CC 2021-08-24_11a NCMA Annual Report_2020MEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, ASSISTANT CITY MANAGER/PUBLIC WORKS
DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: PRESENTATION OF THE 2020 ANNUAL REPORT FOR THE
NORTHERN CITIES MANAGEMENT AREA
D ATE: AUGUST 24, 2021
SUMMARY OF ACTION:
The Annual Report presents an assessment of groundwater conditions based on data
collected during the 2020 calendar year. The document satisfies a requirement of the
“Stipulation and Judgement After Trial” for the Santa Maria Groundwater Basin
Adjudication. This document is also useful for those wishing to understand the
groundwater basin used by the cities of Arroyo Grande, Grover Beach, Pismo Beach,
and the Oceano Community Services District. No action other than receiving and filing
the document is recommended at this time.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
The FY 2020/21 budget for the NCMA was $107,400. Staff time for the NCMA is
approximately 100 hours a year.
RECOMMENDATION:
It is recommended that the City Council receive and file the 2020 Northern Cities
Management Area (NCMA) annual report.
BACKGROUND:
NCMA Annual Report
Due to a California Superior Court Ruling in 2008, the rights to the Santa Maria
Groundwater Basin (SMGB) have been adjudicated to various agencies. Part of that
ruling established three management areas, including the Northern Cities Management
Area (NCMA), the Nipomo Mesa Management Area (NMMA) and the Santa Maria
Valley Management Area (SMVMA). The City of Arroyo Grande is part of the NCMA
along with the cities of Grover Beach and Pismo Beach, and the Oceano Community
Services District. Further, the Ruling mandated that “a monitoring program be
established in each of the three Management Areas to collect and analyze data
regarding water supply and demand conditions,” and that an annual report be filed with
the Court within 120 days after the end of each calendar year.
Item 11.a. - Page 1
CITY COUNCIL
PRESENTATION OF THE 2020 ANNUAL REPORT FOR THE NORTHERN CITIES
MANAGEMENT AREA
AUGUST 24, 2021
PAGE 2
In 2009, a technical group of the NCMA jurisdictions was formed to meet on a monthly
basis and coordinate water sampling and preparation of an annual report required by
the Court’s decision in the Santa Maria Groundwater Basin Adjudication. The NCMA
Technical Group (NCMA TG) jointly selects consultants to provide engineering and
water resource technical services in order to meet the court ordered requirements for
the Santa Maria Groundwater Basin, as well as for overall water resource planning.
Through the NCMA TG, member agencies work together to manage the Northern Cities
Management Area portion of the SMGB and meet the annual reporting requirements of
the Court Order. The 2020 NCMA Annual Report, prepared by GSI Water Solutions,
Inc. (GSI), was filed with the Court after being reviewed by the City’s special water
counsel.
ANALYSIS OF ISSUES:
NCMA Annual Report
The 2005 Stipulation, later affirmed in the 2008 Judgment, for the Santa Maria
Groundwater Basin Adjudication requires that each of the management areas identified
in the adjudication develop a monitoring program that is sufficient to determine the
following:
•Land and water uses in the basin;
•Sources of supply to meet those uses;
•Groundwater conditions (including water levels and water quality);
•Amount and disposition of developed water supplies; and
•Amount and disposition of other sources of water supply in the NCMA.
The Stipulation additionally requires that each of the Management Areas prepare an
annual report, to be submitted to the Court, which summarizes the results of the
monitoring program, changes in groundwater supplies, and any threats to groundwater
supplies.
In 2009, the NCMA TG selected Todd Engineers to initiate the NCMA monitoring
program, which included collection of water quality samples from coastal sentry wells,
and to begin development of the 2009 NCMA Annual Report. GEI Consulting
Engineers and Scientists performed the monitoring and prepared reports for 2010 -
2012, Fugro Consultants for 2013 - 2015, and GSI since 2016; all of which have been
successfully filed with the Court.
The NCMA TG is currently supported by Water Systems Consulting, Inc. (WSC).
Together, the NCMA TG and WSC hired GSI to compile the data gathered during
quarterly groundwater monitoring efforts and to create the 2020 NCMA Annual Report.
Item 11.a. - Page 2
CITY COUNCIL
PRESENTATION OF THE 2020 ANNUAL REPORT FOR THE NORTHERN CITIES
MANAGEMENT AREA
AUGUST 24, 2021
PAGE 3
A copy of the full report is provided as Attachment 1 to this staff report. The following
list is a summary of the report’s highlights and important information:
1.During 2020, water elevations generally decreased slightly throughout most of
the NCMA portion of the basin.
2.The total water used in the NCMA in 2020 (surface, State water, groundwater,
and other water), including applied irrigation and private pumping by rural water
users, was 8,577 acre feet (AF), compared to 8,296 AF in 2019, and is
summarized below in Table ES-1. Total ground water pumping was 3,064 AF
which is 32% of the 9,500 AF current safe yield.
Table ES-1
Total Water Used in the NCMA in 2020 in Acre-Feet (AF)
Lake Lopez State Water Ground
Water
Other
Supplies Total
Arroyo Grande 2,242 0 39 36 2,317
Grover Beach 789 0 500 0 1,289
Pismo Beach 1,045 677 55 0 1,777
OCSD 664 60 19 0 743
Total Urban Use 4,740 737 613 36 6,126
Applied Irrigation 0 0 2,308 0 2,308
Rural Water Users 0 0 82 0 82
Non-potable Irrigation
by Arroyo Grande 0 0 61 0 61
Grand Total Used 4,740 737 3,064 36 8,577
Even with the reduced pumping, water elevations throughout the area declined
by several feet, with some areas finishing the year with water elevations below
sea level. Typically, when pumping is less than the yield of an aquifer, the
remaining volume of groundwater results in increased groundwater in storage,
which is then manifested by rising water levels. The current condition, with
groundwater pumping at 32% of the safe yield and declining water elevations,
illustrates the impacts of the ongoing dry conditions that has reduced recharge.
3.During 2020, there were no indications of seawater intrusion.
4.Rainfall for the 2020 calendar year was approximately 64% of the long-term
average rainfall, with 10.0 inches of rain.
Item 11.a. - Page 3
CITY COUNCIL
PRESENTATION OF THE 2020 ANNUAL REPORT FOR THE NORTHERN CITIES
MANAGEMENT AREA
AUGUST 24, 2021
PAGE 4
5.The deep well index in January 2020 was above the trigger value of 7.5, with a
value of 10.0. In October 2020, the deep well index dropped to 7.5. If the deep
well index drops below 7.5 for six consecutive quarters, this will trigger Stage 1
water restrictions.
Based on the findings of this report, the fragile health of the basin is illustrated by water
elevations at just a few feet above sea level, coupled with the formation of a pumping
depression in the Cienega Valley just west of the NCMA/NMMA boundary. These
findings indicate that the basin has very little ability to withstand droughts, increases in
regional pumping, or other changes that reduce recharge, either directly or through
subsurface inflow from the east.
ALTERNATIVES:
The following alternatives are provided for the Council’s consideration:
1.Receive and file the 2020 NCMA Annual Report; or
2.Provide other direction to staff.
AD VANTAGES:
The NCMA Annual Report is required by the Court and includes important monitoring
information pertinent to the City’s groundwater supply.
DISADVANTAGES:
No disadvantages have been identified.
ENVIRONMENTAL REVIEW:
No environmental review is required for this item.
PUBLIC NOTIFICATION AND COMMENTS:
The Agenda was posted at City Hall and on the City’s website in accordance with
Government Code Section 54954.2.
Attachment:
1.NCMA 2020 Annual Report
Item 11.a. - Page 4
FINAL
Northern Cities Management Area Technical Group
Northern Cities Management Area 2020
Annual Monitoring Report
Prepared for
City of Arroyo Grande City of Grover Beach Oceano Community Services District
City of Pismo Beach
April 9, 2021
Prepared by:
GSI Water Solutions, Inc.
5855 Capistrano Avenue, Suite C, Atascadero, CA 93422
ATTACHMENT 1
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Northern Cities Management Area
2020 Annual Monitoring Report
This report was prepared by the staff of GSI Water Solutions, Inc., in collaboration with GEI Consultants, Inc.,
under the supervision of professionals whose signatures appear below. The findings or professional opinion
were prepared in accordance with generally accepted professional engineering and geologic practice.
Paul A. Sorensen, PG, CHg
Principal Hydrogeologist
Project Manager
Nathan R. Page, PG
Managing Hydrogeologist
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Contents
Executive Summary .................................................................................................................................................. 1
Groundwater Conditions ...................................................................................................................................... 1
Groundwater Levels ......................................................................................................................................... 1
Change in Groundwater in Storage ................................................................................................................. 2
Groundwater Quality ......................................................................................................................................... 3
Water Supply and Production/Deliveries ............................................................................................................ 3
Threats to Water Supply ....................................................................................................................................... 4
SECTION 1: Introduction........................................................................................................................................... 7
1.1 History of Litigation .................................................................................................................................. 7
1.2 Description of the NCMA Technical Group ........................................................................................... 10
1.3 NCMA TG Mission Statement ................................................................................................................ 11
1.4 Coordination with Management Areas ................................................................................................. 11
1.5 Development of Monitoring Program .................................................................................................... 12
1.6 Groundwater Monitoring Network ......................................................................................................... 12
1.7 Recent and Ongoing Strategic Initiatives ............................................................................................. 16
1.7.1 Strategic Plan .................................................................................................................................. 16
1.7.2 Central Coast Blue .......................................................................................................................... 16
1.7.3 Phase 1B Groundwater Model ....................................................................................................... 17
1.7.4 Airborne Electromagnetic Survey .................................................................................................. 17
SECTION 2: Basin Setting....................................................................................................................................... 19
2.1 Setting ..................................................................................................................................................... 19
2.2 Precipitation ........................................................................................................................................... 19
2.3 Evapotranspiration ................................................................................................................................. 23
2.4 Geology and Hydrogeology .................................................................................................................... 23
2.5 Groundwater Flow .................................................................................................................................. 24
SECTION 3: Groundwater Conditions .................................................................................................................... 27
3.1 Groundwater Levels ............................................................................................................................... 27
3.1.1 Groundwater Level Contour Maps ................................................................................................. 27
3.1.2 Historical Water Level Trends ........................................................................................................ 30
3.1.3 Sentry Wells and the Deep Well Index .......................................................................................... 30
3.2 Change in Groundwater in Storage ....................................................................................................... 41
3.3 Water Quality .......................................................................................................................................... 44
3.3.1 Quarterly Groundwater Monitoring ................................................................................................ 44
3.3.2 Analytical Results Summary ........................................................................................................... 47
SECTION 4: Water Supply and Production/Delivery ............................................................................................. 49
4.1 Water Supply .......................................................................................................................................... 49
4.1.1 Lopez Lake ...................................................................................................................................... 49
4.1.2 State Water Project ........................................................................................................................ 51
4.1.3 Groundwater ................................................................................................................................... 52
4.1.4 Developed Water ............................................................................................................................ 55
4.1.5 Other Supplies ................................................................................................................................ 55
4.1.6 Total Water Supply Availability ....................................................................................................... 56
4.2 Water Use ............................................................................................................................................... 58
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4.2.1 Agricultural Water Supply Requirements ...................................................................................... 58
4.2.2 Rural Use ......................................................................................................................................... 65
4.2.3 Urban Production for Potable Use ................................................................................................. 66
4.2.4 2020 Groundwater Pumpage ........................................................................................................ 66
4.2.5 Changes in Water Production ........................................................................................................ 69
SECTION 5: Comparison of Water Supply and Water Production ........................................................................ 73
SECTION 6: Threats to Water Supply ..................................................................................................................... 75
6.1 Threats to Local Groundwater Supply ................................................................................................... 75
6.1.1 Declining Water Levels ................................................................................................................... 75
6.1.2 Seawater Intrusion ......................................................................................................................... 75
6.2 Threats to State Water Project Supply .................................................................................................. 79
6.3 Threats to Lopez Lake Water Supply .................................................................................................... 80
SECTION 7: Management Activities ....................................................................................................................... 81
7.1 Strategic Plan ......................................................................................................................................... 81
7.1.1 Purpose and Background ............................................................................................................... 81
7.1.2 Mission Statement ......................................................................................................................... 81
7.1.3 Objectives of the NCMA TG ............................................................................................................ 81
7.1.4 Strategic Initiatives and Implementation Plan .............................................................................. 82
7.2 Management Objectives ........................................................................................................................ 82
7.2.1 Share Groundwater Resources and Manage Pumping ................................................................ 83
7.2.2 Enhance Management of NCMA Groundwater ............................................................................. 84
7.2.3 Monitor Supply and Demand and Share Information .................................................................. 85
7.2.4 Manage Groundwater Levels and Prevent Seawater Intrusion ................................................... 88
7.2.5 Protect Groundwater Quality .......................................................................................................... 90
7.2.6 Manage Cooperatively .................................................................................................................... 91
7.2.7 Encourage Water Conservation ..................................................................................................... 92
7.2.8 Evaluate Alternative Sources of Supply ........................................................................................ 96
SECTION 8: References .......................................................................................................................................... 99
Tables
Table 1. NCMA TG Representatives ...................................................................................................................... 10
Table 2. Lopez Lake (SLOFCWCD Zone 3 Contractors) Water Allocations (AFY) ................................................ 49
Table 3. Lopez Lake Municipal Diversion LRRP Reduction Strategy .................................................................. 50
Table 4. Lopez Lake Downstream Release LRRP Reduction Strategy ................................................................ 50
Table 5. Lopez Lake Deliveries, 2020 ................................................................................................................... 51
Table 6. NCMA SWP Deliveries, 2020 ................................................................................................................... 52
Table 7. NCMA Groundwater Entitlement and Production from Santa Maria Groundwater Basin, 2020 ....... 55
Table 8. Baseline (Full Entitlement) Available Urban Water Supplies (AFY) ....................................................... 56
Table 9. Available Urban Water Supply, 2020 ...................................................................................................... 57
Table 10. NCMA Crop Acreages and Calculated Evapotranspiration, 2020 ...................................................... 60
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Table 11. Flow Terms Used in Root Zone Routing for IDC Model ....................................................................... 61
Table 12. IDC Model Results of Monthly Applied Water, 2020 ........................................................................... 64
Table 13. Estimated Rural Water Production, 2020 ............................................................................................ 65
Table 14. Historical Urban Water Production for Potable Use (Groundwater and Surface Water) ................... 66
Table 15. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2020 (AF) ............................ 67
Table 16. Historical Total Water Use (Groundwater and Surface Water, AF) ..................................................... 69
Table 17. Water Production by Source, 2020 (AF) ............................................................................................... 73
Figures
Figure 1. Santa Maria Groundwater Basin ............................................................................................................. 8
Figure 2. Northern Cities Management Area .......................................................................................................... 9
Figure 3. Locations of Monitoring Wells ................................................................................................................ 14
Figure 4. Depths of Monitoring Wells .................................................................................................................... 15
Figure 5. Annual Precipitation 1950 to 2020 ...................................................................................................... 20
Figure 6. Location of Precipitation Stations .......................................................................................................... 21
Figure 7. Monthly and Average Precipitation and Evapotranspiration ................................................................ 22
Figure 8. Groundwater Elevation Contours Spring 2020 ..................................................................................... 28
Figure 9. Groundwater Elevation Contours Fall 2020 ......................................................................................... 29
Figure 10. Selected Hydrographs .......................................................................................................................... 31
Figure 11. Sentry Well Hydrographs ...................................................................................................................... 32
Figure 12. Hydrograph of Deep Well Index Elevation ........................................................................................... 34
Figure 13. Water Elevation, Conductivity, and Temperature, Well 24B03 ......................................................... 35
Figure 14. Water Elevation, Conductivity, and Temperature, Well 30F03 ......................................................... 36
Figure 15. Water Elevation, Conductivity, and Temperature, Well 30N02 ......................................................... 37
Figure 16. Water Elevation, Conductivity, and Temperature, Well 36L01 ......................................................... 38
Figure 17. Water Elevation, Conductivity, and Temperature, Well 30N02 ......................................................... 39
Figure 18. Water Elevation, Conductivity, and Temperature, Well 32C03 ......................................................... 40
Figure 19. Change in Groundwater Elevation, Deep Aquifer System, April 2019 to April 2020 ....................... 42
Figure 20. Change in Groundwater Elevation, Alluvial Aquifer, April 2019 to April 2020 ................................. 43
Figure 21. Chloride Concentrations in Monitoring Wells ..................................................................................... 45
Figure 22. Total Dissolved Solids Concentrations in Monitoring Wells ............................................................... 46
Figure 23. Piper Diagram of Water Quality in Select Monitoring Wells ............................................................... 48
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Figure 24. Locations of Municipal Production Wells ............................................................................................ 54
Figure 25. NCMA Agricultural Land 2020 ............................................................................................................. 59
Figure 26. 2020 NCMA Estimated Agricultural Water Demand and Monthly Precipitation at the SLO No. 795
Gauge ...................................................................................................................................................................... 63
Figure 27. Municipal Water Use by Source ........................................................................................................... 68
Figure 28. Total Water Use (Urban, Rural, Agricultural) by Source ..................................................................... 70
Figure 29. Historical TDS, Chloride, and Sodium, Index Wells and 30N03 ........................................................ 77
Figure 30. Historical TDS, Chloride, and Sodium, Wells 30N02, MW-Blue, and 36L01.................................... 78
Appendix
Appendix A NCMA Sentry Well Water Level and Water Quality Data
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Abbreviations and Acronyms
2020 Annual Report Northern Cities Management Area 2020 Annual Monitoring Report
AFY acre-feet per year
Arroyo Grande City of Arroyo Grande
ATF advanced treatment facility
APW advanced purified water
CIMIS California Irrigation Management Information System
County San Luis Obispo County
CSA County Service Area
CUP Consumptive Use Program
DDW Division of Drinking Water
Delta Sacramento-San Joaquin Delta
DRI Desert Research Institute
DWR California Department of Water Resources
ET evapotranspiration
Grover Beach City of Grover Beach
gpcd gallons per capita daily
IDC 2015 Integrated Water Flow Model Demand Calculator
IRWMP Integrated Regional Water Management Plan
IWFM 2015 Integrated Water Flow Model
LRRP Low Reservoir Response Plan
NAVD 88 North American Vertical Datum of 1988
NCMA Monitoring
Program
Monitoring Program for the Northern Cities Management Area
NCMA Northern Cities Management Area
Nipomo station Nipomo Station (No. 202)
NMMA Nipomo Mesa Management Area
NRCS Natural Resources Conservation Service
Oceano CSD Oceano Community Services District
OCSD Oceano Community Services District
PE Professional Engineer
PG&E Pacific Gas & Electric
Pismo Beach City of Pismo Beach
SGMA Sustainable Groundwater Management Act
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SLOFCWCD County of San Luis Obispo Flood Control and Water Conservation District
SMGB Santa Maria River Valley Groundwater Basin
SMGBMA Santa Maria Groundwater Basin Management Area
SMVMA Santa Maria Valley Management Area
SSLOCSD South San Luis Obispo County Sanitation District
SWP California State Water Project
SWRCB State Water Resources Control Board
TDS total dissolved solids
TG NCMA Technical Group
UWMP Urban Water Management Plan
WRAC Water Resources Advisory Committee
WSCP Water Shortage Contingency Plan
WWTP wastewater treatment plant
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Executive Summary
The 2020 Annual Monitoring Report for the Northern Cities Management Area (NCMA) (Annual Report) is
prepared pursuant to the requirements of the 2005 Stipulation for the Santa Maria Groundwater Basin
Adjudication (2005 Stipulation) and the January 25, 2008 Judgment After Trial (2008 Judgment). This 2020
Annual Report provides an assessment of hydrologic conditions for the NCMA based on data collected during
the calendar year of record. As specified in the Judgment, the NCMA agencies, consisting of the City of Arroyo
Grande, City of Grover Beach, City of Pismo Beach, and Oceano Community Services District (OCSD), regularly
monitor groundwater in the NCMA and analyze other data pertinent to water supply and demand, including
the following:
Land and water use in the Santa Maria River Valley Groundwater Basin (SMGB or basin)
Sources of supply to meet water demand
Groundwater conditions (including water levels and water quality)
Amount and disposition of NCMA water supplies that are not groundwater
Results of the data compilation and analysis for calendar year 2020 are documented and discussed in this
2020 Annual Report.
Groundwater Conditions
During 2020, water elevations generally decreased slightly in the NCMA portion of the SMGB in response to
below-average rainfall in 2020. The relatively minor decrease in water levels throughout most of the area,
despite the below-average rainfall conditions, is less than would be expected given the recent rainfall patterns.
That the impacts are not greater is attributed to ongoing efforts by all NCMA agencies to minimize groundwater
extraction and maximize surface water supply sources while maintaining the water conservation practices and
requirements brought on by the recent drought.
Groundwater Levels
The greatest threat to the groundwater supply in the area is seawater intrusion. An indicator of whether the
NCMA agencies and other stakeholders are successfully averting the threat of seawater intrusion is the
groundwater elevation in the NCMA sentry wells near the coastline. The average water elevations of three
sentry wells—24B03, 30F03, and 30N02–make up a Deep Well Index. This index was developed by the NCMA
in 2007 to gauge the ability of the aquifer to withhold potential landward migration of seawater. A Deep Well
Index value above 7.5 feet North American Vertical Datum 1988 (NAVD 88)1 generally indicates that sufficient
freshwater flow occurs from the east to the coastline to prevent seawater intrusion. History has shown that a
prolonged period in which the Deep Well Index level is below 7.5 feet develops groundwater conditions that
pose a risk of seawater intrusion. The following are evaluations of groundwater levels through the seasons in
calendar year 2020.
Spring 2020. In the mostly urbanized areas north of Arroyo Grande Creek, groundwater is extracted from
the deep groundwater aquifers of the Paso Robles Formation and the Careaga Sand. The water elevation
contours in the deep aquifer system in spring of 2020 generally showed a westerly to southwesterly
groundwater flow (see Figure 8). These groundwater flow gradients and positive (above mean sea level)
1 Note that NAVD 88 is 2.72 feet lower than mean sea level, as recorded at the Port San Luis tide station datum (available at
https://tidesandcurrents.noaa.gov/datums.html?id=9412110); however, for the purposes of this report it will be referred to
as sea level.
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groundwater elevations are developed and maintained primarily because the NCMA agencies have
managed this portion of the basin through cooperative water management and conservation efforts. The
proactive management of the basin and collaborative efforts by the agencies was necessary to respond
to lower water levels in the Deep Well Index more than a decade ago. The combined NCMA efforts are to
ensure that fresh groundwater flow to the ocean continues to create a barrier to seawater intrusion. April
2020 groundwater elevations in the deep aquifer system main production zone along the coast ranged
from 8.0 to 12.0 feet above sea level. In the southernmost portion of the area, the groundwater elevations,
flow, and gradient are less well known because there are only a limited number of wells and point sources
of water level data. The groundwater gradient and flow in this area are generally inferred on the basis of
historical records and trends as well as water level data from the Nipomo Mesa Management Area (NMMA)
farther east.
The Cienega Valley is in the central area of the NCMA, generally south of Arroyo Grande Creek. Virtually all
groundwater pumping in this area is from the relatively shallow (less than 100 feet deep) alluvial aquifer.
Agricultural groundwater production typically results in seasonal drawdown of the alluvial aquifer in the
valley. Groundwater elevations in the alluvial aquifer in the Cienega Valley were in the range of below 0
feet to more than 30 feet above sea level in spring 2019. These data show a general decrease in alluvial
groundwater elevations from April 2019 to April 2020. During the recent drought, spring alluvial
groundwater elevations showed a subdued pumping trough in the Cienega Valley, with groundwater
elevations generally below sea level in the center of the depression.
Fall 2020. Groundwater level contours for October 2020 are presented in Figure 9. Groundwater
elevations in the alluvial aquifer within the Cienega Valley in October 2020 were 1 to 23 feet lower than
elevations at the start of the irrigation season in April 2020, which is a typical seasonal response to the
irrigation season. These conditions are consistent with the pumping depressions observed historically
during the fall in the Cienega Valley. The alluvial groundwater elevation in the pumping depression in
October 2020, at 14.4 feet below sea level, was 3.2 feet higher than in October 2019. October 2020
groundwater elevations in the deep aquifer system main production zone along the coast ranged from 4.8
to 7.0 feet above sea level.
Deep Wells. In 2020, the Deep Well Index started the year above the 7.5-foot threshold value with an
index number in January of more than 10 feet. The Deep Well Index continued to rise through the winter
and early spring, reaching a high of more than 12 feet in April, and then began a steady decline into and
throughout the summer season, as is typical. The index value dropped down to the 7.5-foot threshold value
briefly in mid-October and then immediately began to rise. The index value continued to rise throughout
the end of the year and finished 2020 at about 9 feet above sea level.
NCMA/NMMA Boundary. The water elevation in the San Luis Obispo County monitoring well (Well 32C03),
which was installed to monitor aquifer conditions along the NCMA/NMMA boundary, typically exhibits
regular seasonal fluctuations. As in 2019, the water elevation in the well remained above sea level
throughout all of 2020, in contrast to the 2013 through 2016 period when the water levels in the
NCMA/NMMA boundary area typically dropped below sea level in August and remained at a low elevation
until early October.
Change in Groundwater in Storage
The change in groundwater in storage in the NCMA portion of the SMGB between April 2019 and April 2020
is estimated by comparing water level contour maps created for these periods and calculating the volume
change from April 2019 to April 2020. Separate estimates of change in groundwater in storage were computed
for both the deep aquifer system and for the alluvial aquifer and then summed to represent the total NCMA
estimated change in groundwater in storage. Comparison of April water levels was chosen to comply with the
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California Department of Water Resources (DWR) reporting requirements under the Sustainable Groundwater
Management Act (SGMA).2
A decrease of groundwater in storage is a reflection of a net decrease in water levels across the aquifer. During
the period of April 2019 to April 2020, the NCMA portion of the SMGB experienced a net decrease of
groundwater in storage. The net decrease in groundwater levels represented a decrease of groundwater in
storage from April 2019 to April 2020 of approximately 500 acre-feet (AF); that is, there was approximately
500 AF less groundwater stored in the NCMA portion of the SMGB in April 2020 than in April 2019.
Groundwater Quality
Analytical results of key water quality data (chloride, total dissolved solids [TDS], and sodium) in 2020 were
generally consistent with historical concentrations and observed ranges of constituent concentrations. In
general, no water quality results were observed that are a cause of concern.
None of the water quality results from monitoring events throughout 2020 indicate an incipient episode or
immediate threat of seawater intrusion. Water quality degradation through incipient seawater intrusion
occurred in 2009 with measured elevated concentrations of TDS, sodium, and chloride in wells 30N02,
30N03, and MW-Blue, all of which are screened in the Paso Robles Formation. No indications of seawater
intrusion have been observed in wells screened in the underlying Careaga Sand. Once TDS, sodium, and
chloride concentrations declined in the sentry well groundwater following the 2009–2010 season, the location
of the seawater-freshwater interface was unknown, although the interface apparently is and has remained at
some distance offshore since the 2009–2010 season.
Water Supply and Production/Deliveries
Total water use in the NCMA in 2020 (including urban use by the NCMA agencies plus agricultural irrigation
and private pumping by rural water users) was 8,577 AF. Of this amount, Lopez Lake deliveries were 4,740
AF, California State Water Project deliveries totaled 737 AF, and groundwater pumping from the NCMA
portion of the SMGB accounted for approximately 3,064 AF. This is the lowest groundwater production
volume from the SMGB in more than 20 years. The City of Arroyo Grande produced 36 AF from its Pismo
Formation wells, outside the SMGB, in 2020. The breakdown is shown in Table ES- 1 (following page).
Urban water use in 2020 among the NCMA agencies was 6,126 AF, a slight increase from 2019. Urban
water use in the past 20 years has ranged from 5,476 AF (2016) to 8,982 AF (2007). Water use generally
declined from 2007 to 2016—with only slight increases in the trend in 2012 and 2013—and has only
varied slightly since 2016. The decline in pumpage since 2013 was in direct response to a statewide order
by the governor to reduce the amount of water used in urban areas by 25 percent. That goal has been
achieved locally by conservation activities implemented by the NCMA agencies.
Agricultural acreage in the NCMA portion of the SMGB has remained relatively constant for more than 20
years. Thus, the annual applied water requirement for agricultural irrigation has been relatively stable,
although it varies with weather conditions. Acknowledging the variability resulting from weather conditions,
agricultural applied water is not expected to change significantly given the relative stability of applied
irrigation acreage and cropping patterns in the NCMA. Changes in rural domestic pumping have not been
significant.
2 On September 16, 2014, Governor Jerry Brown signed into law a three-bill legislative package, composed of Assembly Bill
1739 (Dickinson), Senate Bill (SB) 1168 (Pavley), and SB 1319 (Pavley), collectively known as the Sustainable Groundwater
Management Act (SGMA).
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Table ES- 1. Water Production by Source (AF), 2020
Agency Lopez Lake State Water
Project
SMGB
Groundwater
Other
Supplies1 Total
Urban Area
Arroyo Grande 2,242 0 39 36 2,317
Grover Beach 789 0 500 0 1,289
Pismo Beach 1045 677 55 0 1,777
Oceano CSD 664 60 19 0 743
Urban Water Use Total 4,740 737 613 36 6,126
Non-Urban Area
Agricultural Irrigation
Applied Water 0 0 2,308 0 2,308
Rural Water Users 0 0 82 0 82
Non-potable Irrigation by
Arroyo Grande 0 0 61 0 61
Total 4,740 737 3,064 36 8,577
Notes
1 Other Supplies includes groundwater pumped from outside the NCMA boundaries.
AF = acre-feet CSD = Community Services District SMGB = Santa Maria Groundwater Basin
Threats to Water Supply
Total groundwater pumping (urban, agriculture, and rural domestic) from the SMGB in the NCMA was
3,064 AF in 2020, which is 32 percent of the court-accepted3 9,500 acre-feet per year (AFY) long-term
safe yield of the NCMA portion of the SMGB.
When pumping is less than the safe yield of an aquifer, groundwater in storage should generally increase
and result in rising groundwater levels. As such, groundwater elevations throughout the NCMA portion of
the SMGB should rise significantly if several consecutive years of groundwater pumping occurs at 30 to
40 percent of the safe yield, which has been the case in the NCMA for the past decade. However, as
illustrated by the slight decline in groundwater levels during 2020, the data show that the aquifer is still
in a tenuous position with respect to the threat of seawater intrusion. The fragile health of the aquifer is
illustrated by water elevations at just a few feet above sea level, coupled with the formation of a pumping
depression in the alluvial aquifer within the Cienega Valley just west of the NCMA/NMMA boundary.
According to the DWR Bulletin 63-3 report, both the Paso Robles Formation aquifer and the lower confined
portion of the Cienega Valley alluvial aquifer are recharged primarily from subsurface groundwater inflow
from the east, where the overlying confining layers are thin to non-existent (DWR, 1970). These recharge
areas to the east include inland reaches of Arroyo Grande Valley and portions of Nipomo Mesa (DWR,
1970). The data indicate that the aquifer has little ability to withstand future droughts. Any increase in
3 The calculated, consensus safe yield value of 9,500 AFY for the NCMA portion of the SMGB was included in the 2002
Settlement Agreement through affirmation of the 2001 Groundwater Management Agreement among the NCMA agencies,
which is described in more detail in Section 1.1 of this report.
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regional pumping, or any other changes that reduce recharge from the east (Nipomo Mesa) will leave the
NCMA with a serious groundwater deficit that threatens seawater intrusion.
Historically, groundwater flowed from higher elevations inland westward towards the ocean, thereby acting
to prevent seawater intrusion. In recent years, the well-documented pumping depression 4 in the deep
aquifer system near Black Lake Canyon within the NMMA appears to have reversed the groundwater
gradient. The apparent development of a landward gradient in the southern portion of the NCMA, because
of the pumping depression in the NMMA, likely reduces the historical recharge volume of subsurface inflow
into the NCMA from Nipomo Mesa. This reduction of subsurface inflow to the NCMA creates conditions
more likely to result in seawater intrusion in the NCMA and NMMA.
During 2020, there were no indications of seawater intrusion but any increase of groundwater pumping
or decrease in rainfall may quickly result in a greater risk of seawater intrusion.
4 As documented in NMMA annual reports, available at https://ncsd.ca.gov/resources/reports-by-subject. (Accessed March 9,
2021.)
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SECTION 1: Introduction
This Northern Cities Management Area 2020 Annual Monitoring Report (2020 Annual Report or Annual
Report) summarizes hydrologic conditions for calendar year 2020 in the Northern Cities Management Area
(NCMA) of the Santa Maria River Valley Groundwater Basin (SMGB or the basin) in San Luis Obispo County
(County), California (Figure 1). This report was prepared on behalf of four public agencies collectively referred
to as the Northern Cities, which include the City of Arroyo Grande (Arroyo Grande), City of Grover Beach (Grover
Beach), City of Pismo Beach (Pismo Beach), and the Oceano Community Services District (OCSD; Oceano
CSD)5,6 (Figure 2). These agencies, along with local landowners, the County, and the County of San Luis Obispo
Flood Control and Water Conservation District (SLOFCWCD) have managed local surface water and
groundwater resources since the late 1970s to preserve the long-term integrity of water supplies.
1.1 History of Litigation
The rights to pump groundwater from the SMGB have been in litigation (adjudication) since the late 1990s.
The physical solution set forth in the 2005 Stipulation for the Santa Maria Groundwater Basin Adjudication
(2005 Stipulation) and the January 25, 2008, Judgment After Trial (2008 Judgment)7 established
requirements and goals for the management of the entire SMGB. The Superior Court of California, County of
Santa Clara (Court) established three separate management areas, including the NCMA, the Nipomo Mesa
Management Area (NMMA), and the Santa Maria Valley Management Area (SMVMA). The Court mandated that
each management area form a technical group to monitor the groundwater conditions of its area, to
continuously assess the hydrologic conditions of each area, and to prepare an annual report each year to
provide the Court with a summary of the previous year’s conditions, actions, and threats.
The requirements for the annual report, as directed by the Court in the 2005 Stipulation (June 30, 2005,
version, paragraph IV.D.3), are as follows:
Within one hundred and twenty days after each Year end, the Management Area Engineers will file an Annual
Report with the Court. The Annual Report will summarize the results of the Monitoring Program, changes in
groundwater supplies, and any threats to Groundwater supplies. The Annual Report shall also include a
tabulation of Management Area water use, including Imported Water availability and use, Return Flow
entitlement and use, other Developed Water availability and use, and Groundwater use. Any Stipulating Party
may object to the Monitoring Program, the reported results, or the Annual Report by motion.
This 2020 Annual Report satisfies the requirements of the Court. The annual report for each calendar year
(January 1 to December 31) is submitted to the Court by April 30 of the following calendar year, pursuant to
the 2005 Stipulation. As a result of legislation passed by the State of California related to the Sustainable
Groundwater Management Act (SGMA) that requires submittal of annual reports and supporting information
and data for each adjudicated groundwater basin by April 1 of each year, the 2020 Annual Report is also
published to the California Department of Water Resources (DWR) adjudicated basin reporting website.8
5 Each agency may also be individually referred to as an NCMA agency.
6 Portions of Arroyo Grande and Pismo Beach extend outside the NCMA.
7 Santa Maria Valley Water Conservation District v. City of Santa Maria, et al., Case #1-97-CV-770214 Filing #G-79046. (Cal.,
2015).
8 The link to the reporting system is available on this DWR page: https://water.ca.gov/Programs/Groundwater-
Management/SGMA-Groundwater-Management/Adjudicated-Areas.
Item 11.a. - Page 21
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Date: January 28, 2020 Data Sources: DWR, NCMA, ESRI
LEGENDNorthern Cities Management AreaNipomo Mesa Management AreaSanta Maria Valley Management AreaSanta Maria Groundwater Basin (DWR, 2019) County Borders
Santa Maria Groundwater Basin
FIGURE 1
Northern Cities Management AreaSan Luis Obispo County, California
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LEGENDNorthern Cities Management AreaNipomo Mesa Management AreaSanta Maria Groundwater Basin (DWR, 2019) Faults (dashed where inferred)Streams
Northern Cities Management Area
FIGURE 2
San Luis Obispo County, California
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The collaborative water supply management approach of the NCMA agencies was recognized by the Court in
the 2001 Groundwater Management Agreement (which was based on the 1983 Gentlemen’s Agreement),
formalized in the Settlement Agreement Between Northern Cities, Northern Cities Landowners, and Other
Parties (2002 Settlement Agreement or Settlement Agreement) and incorporated in the 2005 Stipulation. On
June 30, 2005, the 2005 Stipulation, which included the 2002 Settlement Agreement, was agreed upon by
numerous parties, including the NCMA agencies. The approach then was adopted by the Court in its 2008
Judgment. Although appeals to that decision were filed, a subsequent decision by the Sixth Appellate District
(filed November 21, 2012) upheld the Judgment. On February 13, 2013, the Supreme Court of California
denied a petition to review the decision.
Pursuant to the Court’s continuing jurisdiction, Arroyo Grande, Pismo Beach, and Grover Beach filed a motion
on September 29, 2015, requesting that the Court impose moratoriums on certain water extraction and use
by stipulating parties within the NMMA. Judge Kirwan denied the motion without prejudice. He did, however,
order the parties to meet and confer to address the issues raised in the motion. The meet and confer process
continued throughout 2020 through submittal of several motions and continuation of the case management
conference process. The order by the Court precipitated a series of meetings and collaborative actions
between the NCMA and NMMA agencies, including the tentative formation of a Seawater Intrusion Working
Group to discuss the threat and potential solutions for possible seawater intrusion.
1.2 Description of the NCMA Technical Group
Pursuant to a requirement in the 2005 Stipulation, the NCMA Technical Group (TG) was formed (Paragraph
IV.C and Paragraph VII). The TG is composed of representatives of each of the NCMA agencies, as listed in
Table 1.
Table 1. NCMA TG Representatives
Agency Representative
City of Arroyo Grande
Bill Robeson
Public Works Director
Shane Taylor
Utilities Manager
City of Grover Beach
Gregory A. Ray, PE
Director of Public Works/City Engineer
R.J. (Jim) Garing, PE
Consulting City Engineer for Water and Sewer
City of Pismo Beach Benjamin A. Fine, PE
Director of Public Works/City Engineer
Oceano CSD
Will Clemens
General Manager
Tony Marracino
Utility Systems Supervisor
Notes
CSD = Community Services District PE = Professional Engineer
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The NCMA TG contracts with Water Systems Consulting, Inc. (WSC), to serve as staff extension to assist the
TG in its roles and responsibilities in managing the water supply resources. The TG also contracts with GSI
Water Solutions, Inc., and its subconsulting partner, GEI Consultants, Inc., to conduct the quarterly
groundwater monitoring and sampling tasks, evaluate water demand and available supply, identify threats to
water supply, and assist the TG in preparation of the annual report.
1.3 NCMA TG Mission Statement
The NCMA TG developed the following mission statement to help guide ongoing initiatives and to capture the
requirements outlined in the 2001 Groundwater Management Agreement, 2002 Settlement Agreement, 2005
Stipulation, and 2008 Judgment:
Preserve and enhance the sustainability of water supplies for the Northern Cities Area by:
• Enhancing supply reliability
• Protecting water quality
• Maintaining cost-effective water supplies
• Advancing the legacy of cooperative water resources management
• Promoting conjunctive use
1.4 Coordination with Management Areas
Since 1983, management of the NCMA has been based on cooperative efforts of the four NCMA agencies in
continuing collaboration with the County, SLOFCWCD, and other local and state agencies. Specifically, the
NCMA agencies have jointly monitored and managed their groundwater production and, in cooperation with
the SLOFCWCD, invested in surface water supplies to reduce dependence on groundwater pumping and
protect the groundwater resource. In addition to the efforts discussed in this 2020 Annual Report, cooperative
management occurs through many means, including communication by the NCMA agencies in their respective
public meetings, participation in the SLOFCWCD Zone 3 9 Advisory Committee (related to the management and
operation of Lopez Lake, which is described further in Section 4.1.1), and participation in the Water Resources
Advisory Council (WRAC, the County-wide advisory panel on water issues). The NCMA agencies are active
participants in current and ongoing integrated regional water management efforts and participated in
preparation and adoption of the 2014 update of the San Luis Obispo County Integrated Regional Water
Management Plan (IRWMP). The IRWMP promotes integrated regional water management to ensure
sustainable water uses, reliable water supplies, better water quality, environmental stewardship, efficient
urban development, protection of agriculture, and a strong economy.
Since the 2008 Judgment, the NCMA TG has taken the lead in cooperative management of its management
area. The NCMA TG has met monthly (at a minimum) for many years and continued to do so throughout 2020.
Based on the threat of COVID-19,10 as reflected in the Proclamations of Emergency issued by the Governor of
the State of California, all TG meetings after March 17, 2020, were conducted as a phone-in/web-based
format. The TG also participates in the Santa Maria Groundwater Basin Management Area (SMGBMA)
technical subcommittee, formed in 2009; however, no meetings of the SMGBMA were held in 2020. The
purpose of the SMGBMA technical subcommittee is to coordinate efforts among the three management areas
(NCMA, NMMA, SMVMA) such as sharing data throughout the year and during preparation of the annual report,
9 Flood Control Zone 3 (Lopez Project) is operated by SLOFCWCD to operate Lopez Reservoir for municipal and agricultural
water supplies. It was established to operate the Lopez water supply system and is a wholesale supplier. The contractors in
Zone 3 include the communities of Oceano, Grover Beach, Pismo Beach, Arroyo Grande, and County Service Area 12
(including the Avila Beach area).
10 The abbreviation for coronavirus disease 2019.
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reviewing and commenting on technical work efforts of other management areas, standardizing monitoring
protocols, considering projects and grant opportunities of joint interest and benefit, and sharing information
and data among the managers of the three management areas.
The outcomes of the motion that Arroyo Grande, Pismo Beach, and Grover Beach filed on September 29,
2015, include increased discussion and collaboration between the NCMA and NMMA. One of the initiatives
was the formation of an NCMA-NMMA Management Coordination Committee that has met several times since
2018 to discuss items of mutual concern and develop strategies for addressing the concerns. Another area
of increased mutual collaboration between the NCMA and NMMA was the formation in 2016 of a technical
team to collaboratively develop a single data set of water level data points as part of preparing a consistent
set of semiannual water level contour maps for the NCMA and NMMA. Those efforts continued into and
throughout 2020 and resulted in the development of consistent water level contouring (and enhanced
understanding of groundwater conditions) throughout the NCMA and NMMA.
1.5 Development of Monitoring Program
The 2008 Judgment orders the stipulating parties to comply with all terms of the 2005 Stipulation. As specified
in the Judgment and as outlined in the Monitoring Program for the Northern Cities Management Area (Todd
Groundwater, Inc. [Todd], 2008) (NCMA Monitoring Program), the NCMA agencies are to conduct groundwater
monitoring of wells in the NCMA. In accordance with requirements of the Judgment, the NCMA agencies collect
and analyze data pertinent to water supply and demand, including the following:
Land and water use in the NCMA portion of the SMGB
Sources of supply to meet those uses
Groundwater conditions (including water levels and water quality)
Amount and disposition of other sources of water supply in the NCMA
The NCMA Monitoring Program requires that the NCMA agencies gather and compile pertinent information on
a calendar-year basis; this is accomplished through data collected by NCMA agencies (including necessary
field work), the SLOFCWCD, and by other public agencies. Periodic reports, such as Urban Water Management
Plans (UWMPs) prepared by Arroyo Grande, Grover Beach, and Pismo Beach, provide information about
demand, supply, and water supply facilities. Annual data are added to the comprehensive NCMA database
and analyzed. Results of the data compilation and analysis for 2020 are documented and discussed in this
2020 Annual Report.
As shown in Figure 1, the NCMA represents the northernmost portion of the SMGB as defined in the 2005
Stipulation. Adjoining the NCMA to the south and east is the NMMA; the SMVMA encompasses the remainder
of the SMGB. Figure 2 shows the locations of the four NCMA agencies in the NCMA.
1.6 Groundwater Monitoring Network
The NCMA Monitoring Program includes (1) compilation of groundwater elevation data from the County, (2)
water quality and groundwater elevation monitoring data from the network of sentry and monitoring wells in
the NCMA, (3) water quality data from the State Water Resources Control Board (SWRCB) Division of Drinking
Water (DDW), and (4) groundwater elevation data from municipal pumping wells. Analysis of these data is
summarized below in accordance with the NCMA Monitoring Program (Todd, 2008) and as modified as
additional well data and data sources have become available over the years.
Approximately 150 wells within the NCMA were monitored for water levels by the County at some time during
the past few decades. The County currently monitors the water level in 50 wells within the NCMA on a
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semiannual basis in April and October. The County monitoring program includes four sentry well clusters
(piezometers) along the coast, a four-well cluster in Oceano, and County Monitoring Well No. 3 (12N/35W-
32C03) (County Monitoring Well No. 3 [32C03]) located on the eastern NCMA boundary between the NCMA
and NMMA (Figure 3). The County monitors more than 125 additional wells in the NMMA portion of the SMGB
within the County. Beginning in 2009, the NCMA agencies initiated a quarterly sentry well monitoring program
to supplement the County’s semiannual schedule.
To monitor overall changes in groundwater conditions, representative wells within the NCMA were selected for
preparation of hydrographs and evaluation of water level changes. Wells were selected based on the following
criteria:
The wells must be part of the County’s current monitoring program or part of a public agency’s regular
monitoring program.
Detailed location information must be available.
Construction details of the wells must be available.
The locations of the wells should have a wide geographic distribution.
The historical record of water level data must be long and relatively complete.
Many of the wells that have been used in the program are production wells that were not designed for
monitoring purposes (i.e., the wells are screened across various production zones). Moreover, many of the
wells are active production wells or are located near active wells and are therefore potentially subject to
localized pumping effects that result in measurements that are lower than the regionally representative water
level. These effects are not always apparent at the time of measurement and data cannot easily be identified
as representing static groundwater levels in specific zones (e.g., unconfined or deep confined to semi-
confined). Therefore, data should be considered as a whole in developing a general representation of
groundwater conditions.
The “sentry” wells (32S/12E-24Bxx, 32S/13E-30Fxx, 32S/13E-30Nxx, and 12N/36W-36Lxx) are a critical
element of the groundwater monitoring network and are designed to provide an early warning system to
identify potential seawater intrusion in the aquifer (Figure 3). Each sentry well consists of a cluster of multiple
wells that allows for the measurement of groundwater elevation and quality from discrete depths. Also shown
in Figure 3 is the OCSD observation well cluster, a dedicated monitoring well cluster located just seaward of
OCSD production wells 7 and 8, and County Monitoring Well No. 3 (32C03). Figure 4 shows the depth and well
names of the sentry well clusters, the OCSD observation well cluster, and County Monitoring Well No. 3
(32C03).
Traditionally, the wells were divided into three basic depth categories including shallow, intermediate, and
deep to describe the relative depths of each monitoring well within the cluster. The basic depth categories do
not necessarily describe the geologic unit and relative depth of the unit that the screened portion of the well
monitors. It is important, however, to recognize and identify the geologic unit that each well monitors. The
water level responses and water quality changes are quite different in wells that monitor the shallow alluvial
unit (24B01, 30F01, and 30N01), the Paso Robles Formation (24B02, 30F02, 30N02, 30N03, 36L01, OCSD
MW-Green, OCSD MW-Blue, and 32C03), and the deeper Careaga Sand (24B03, 30F03, 36L02, OCSD MW-
Silver, and OCSD MW-Yellow). The significance of this level of differentiation will be studied more extensively
in the future.
Item 11.a. - Page 27
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Oceano DunesWells 12N/36W-36L01, 02
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Date: February 26, 2020 Data Sources: NCMA, USGS, California Geological Survey, ESRI
LEGEND
!>NCMA Monitoring WellsNorthern Cities Management Area Faults (dashed where inferred)Streams
Locations of Monitoring Wells
FIGURE 3
Northern Cities Management AreaSan Luis Obispo County, California
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FIGURE 4. DEPTHS OF MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California
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Since the sentry well monitoring program began in 2009, 49 monitoring events have been conducted. These
monitoring events include collection of synoptic groundwater elevation data and water quality samples for
laboratory analysis.
1.7 Recent and Ongoing Strategic Initiatives
1.7.1 Strategic Plan
An NCMA Strategic Plan was first developed in 2014 to provide the NCMA TG with a mission statement to
guide future initiatives, provide a framework for identifying and communicating water resource planning goals
and objectives, and formalize a 10-year work plan for implementation of those efforts. Several key objectives
were identified related to enhancing water supply reliability, improving water resource management, and
increasing effective public outreach. Implementation of these efforts continued throughout 2020.
Work began in 2019 to update the 2014 NCMA Strategic Plan (Strategic Plan). The Strategic Plan was
developed over a series of strategic planning sessions and NCMA TG meetings and culminated with the
publication of the Strategic Plan for the NCMA TG in March 2020.
Several key strategies were identified by the TG for improving the sustainability of the water resource. Strategic
initiatives were then developed for each key strategy. The TG then developed an implementation plan for the
key strategies that includes current, short-term, and long-term time frames for initiatives that could be
completed within 1 year, 5 years, and more than 5 years.
A more detailed description of the Strategic Plan is provided in Section 7.1.
1.7.2 Central Coast Blue
Central Coast Blue is a regional recycled water project in the planning and design phase that will develop a
sustainable water supply and help protect the SMGB. The project consists of advanced treatment of water
from the Pismo Beach wastewater treatment plant (WWTP) in Phase I and the South San Luis Obispo County
Sanitation District (SSLOCSD) WWTP in Phase II (should it be deemed feasible and necessary) and injection of
the purified effluent into the SMGB to reduce the risk of seawater intrusion and improve water supply
sustainability for the region. Currently the water from both wastewater treatment plants is being treated and
discharged to the ocean. Central Coast Blue will provide an opportunity to capture this lost water and use it to
recharge the SMGB to create a drought-proof, sustainable water supply for the community by not only
increasing the volume accessible in the aquifer but by creating a barrier to prevent landward migration of
seawater. Tasks related to the development of the project that were performed prior to and throughout 2020
include feasibility study analysis, preliminary design, pilot plant development and operation, funding
appropriation, cost/benefit sharing analysis, groundwater modeling (see Section 1.7.3), airborne geophysics
investigation, and environmental review.
The intent of Central Coast Blue is to enable Pismo Beach and partnering NCMA agencies to construct an
advanced treatment facility (ATF) to produce advanced purified water (APW) to augment its water supply
through injection to recharge the aquifer and develop a seawater intrusion barrier to improve water supply
reliability for the area. In addition to the ATF—which will include microfiltration/ultrafiltration, reverse osmosis,
and ultraviolet disinfection with advanced oxidation treatment processes—the project will include construction
of conveyance pipelines as well as injection and monitoring wells to inject and monitor the APW in the
groundwater basin.
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1.7.3 Phase 1B Groundwater Model
As part of Central Coast Blue planning and technical studies, a localized groundwater flow model (the Phase
1A model) was developed for the northern portion of the NCMA. The Phase 1A model evaluated the concept
of injecting APW into the SMGB to increase aquifer recharge, improve water supply reliability, and help prevent
future occurrences of seawater intrusion. Based on the results of the Phase 1A model and through funding by
the SSLOCSD Supplemental Environmental Program, work was initiated in 2017 and continued through 2018,
2019, and into 2020 for development of the Phase 1B groundwater flow model (Geoscience Support Services,
2019). The domain of the Phase 1B model covers the entire NCMA, NMMA, and the portion of the SMVMA
north of the Santa Maria River.
The purpose of the Phase 1B model was to expand the Phase 1A model and use the expanded model to
evaluate a series of groundwater injection and extraction scenarios to further support Central Coast Blue. The
model has now been used to (1) more completely understand the groundwater conditions of the NCMA portion
of the SMGB, (2) understand the groundwater flow dynamics and components of the groundwater water
balance of the aquifer, (3) identify the locations of the proposed injection wells, (4) quantify the amount of
water that can be injected, (5) evaluate strategies for preventing seawater intrusion, and (6) develop estimates
of the overall yield that the Central Coast Blue stakeholders will be able to receive from the project.
1.7.4 Airborne Electromagnetic Survey
In 2020, the City of Pismo Beach, through funding from the Proposition 1 Planning Grant Activities, contracted
with Ramboll US Consulting, Inc., and SkyTEM Surveys to conduct airborne electromagnetic survey of a large
portion of the NCMA portion of the SMGB utilizing the aerial electromagnetic method (AEM). The goal of the
study is to acquire survey data to characterize and map subsurface geologic structures, define the variability
of the resistivities found in the coastal zone, and gain an understanding of the offshore interface between the
fresh and saline groundwater.
The SkyTEM airborne survey was flown in March 2020. Throughout 2020, the acquired data were compiled
and analyzed. The final report, which summarizes the airborne survey results and provides interpretation of
the data, was delivered in December 2020. The results of the study will enhance the understanding of
groundwater flow within the SMGB, the interconnectedness of different parts of the basin, the geologic
framework that controls groundwater flow, and the nature of the seawater-fresh water interface.
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SECTION 2: Basin Setting
2.1 Setting
The Tri-Cities Mesa 11 in the northern portion of the NCMA is predominantly urban (residential/commercial).
The Cienega Valley, a low-lying coastal stream and valley regime, is the area south of Arroyo Grande Creek in
the central part of the area and is predominantly agricultural. The southern and southwestern portions of the
area are composed of beach dunes and small lakes primarily managed by California Department of Parks and
Recreation as a recreational area and a sensitive species habitat.
2.2 Precipitation
Each year, climatological and hydrologic (stream flow) data for the NCMA are added to the NCMA database.
Annual precipitation from 1950 to 2020 is presented in Figure 5.
Historical rainfall data are compiled on a monthly basis for the following two stations:12
DWR California Irrigation Management Information System (CIMIS) Nipomo Station (No. 202) (Nipomo
station) for 2006 to present
San Luis Obispo County-operated rain gauge (No. SLO 795) in Oceano for 2000 to present
The locations of the two stations are shown in Figure 6. In recent years, it was noted that the CIMIS Nipomo
station may have been recording irrigation overspray as precipitation and the precipitation data from the
station may not be reliable. However, the evapotranspiration data are still considered reliable. For this reason
and because the DRI station was discontinued in 2017, the County-operated gauge (No. SLO 795) is the sole
source of precipitation data used in this 2020 Annual Report. Figure 5 is a composite graph combining data
from the DRI and County stations and illustrating annual rainfall totals from available data from 1950 through
2020 (on a calendar-year basis). Average annual rainfall for the NCMA is approximately 15.6 inches.
Monthly rainfall and evapotranspiration (ET) for 2020 as well as average monthly historical rainfall and ET are
presented in Figure 7. During 2020, below-average rainfall occurred for 10 months and above-average rainfall
occurred during the other 2 months. The total for the year was 10.0 inches, more than 5 inches below the
average annual rainfall for the area.
Figure 5 illustrates annual rainfall and shows several multi-year drought cycles (e.g., 6 years, 1984 through
1990) followed by cycles of above-average rainfall (e.g., 7 years, 1991 through 1998). Except for 2010, the
period 2007 through 2015 (8 years) experienced below-average annual rainfall indicating a dry hydrologic
period. This pattern continued into late 2016, when the hydrologic pattern appeared to have broken the
serious drought that the area (and state) had experienced for the previous 5 years. Annual rainfall totals since
2016 have shown normal fluctuations between wet and dry years, as illustrated in Figure 5.
11 Tri-Cities Mesa is an upland physiographic feature covering approximately four square miles. It is a remnant of the
deposition that was laid down, historically, by Pismo and Arroyo Grande Creeks. Older sand dunes now cover the area (DWR,
1970).
12 The Desert Research Institute (DRI) Western Regional Climate Center Pismo Station (Coop ID: 046943) was discontinued in
August of 2017.
Item 11.a. - Page 33
FIGURE 5. ANNUAL PRECIPITATION 1950 TO 2020
Northern Cities Management Area
San Luis Obispo County, California
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FIGURE 6
Northern Cities Management Area
San Luis Obispo County, California
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Date: January 16, 2019 Data Sources: NCMA, SLO County, DRI, CIMIS, ESRI
21Item 11.a. - Page 35
FIGURE 7. MONTHLY AND AVERAGE PRECIPITATION AND EVAPOTRANSPIRATION
Northern Cities Management Area
San Luis Obispo County, California 22Item 11.a. - Page 36
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2.3 Evapotranspiration
CIMIS maintains weather stations in locations throughout the state to provide real-time wind speed, humidity,
and evapotranspiration data. The nearest CIMIS station to the NCMA is the Nipomo station (see Figure 6). The
Nipomo station has gathered data since 2006. While this station may have been subject to irrigation overspray
in recent years (noted in Section 2.2, Precipitation, above), the apparent irrigation overspray does not have a
significant impact on the measurements used for calculating ET. The monthly ET data for the Nipomo station
is shown in Figure 7 for 2020 and average conditions (over 10 years). The ET rate affects recharge potential
of rainfall and the amount of outdoor water use (irrigation).
2.4 Geology and Hydrogeology
The current understanding of the geologic framework and hydrogeologic setting is based on numerous
previous investigations, particularly Woodring and Bramlette (1950), Worts (1951), Miller and Evenson
(1966), DWR (1970, 1979, and 2002), and Fugro (2015).
The NCMA overlies the northwest portion of the SMGB. There are two principal aquifers in the NCMA portion
of the SMGB. Groundwater pumped from the sedimentary deposits that make up the main municipal
production aquifer underlying the NCMA is derived from the Paso Robles Formation 13 and the underlying
Careaga Sand.14 The Paso Robles Formation and Careaga Sand aquifers together are referred to as the deep
aquifer system in this report. All municipal pumping in the NCMA occurs on the Tri-Cities Mesa and is produced
from the deep aquifer.
The second principal aquifer is the alluvial aquifer, consisting of Quaternary-age alluvial sediments of Arroyo
Grande Creek, Los Berros Creek, and the Cienega Valley. All agricultural groundwater production in the Cienega
Valley is presumed to be extracted from a lower, confined to semi-confined portion of the alluvial aquifer (DWR,
1970).
Several faults either cross or form the boundary of the NCMA, as identified by DWR (2002), Pacific Gas &
Electric (PG&E, 2014) (PG&E), and others. The Oceano Fault (USGS, 2006) trends northwest-southeast across
the central portion of NCMA and has been extensively studied by PG&E (2014). Offshore, the Oceano Fault
connects with the Hosgri and Shoreline fault systems several miles west of the coast. Onshore, the Oceano
Fault consists of two mapped fault splays, including the main trace of the Oceano Fault as well as the Santa
Maria River Fault, which diverges northward of the Oceano Fault through the Cienega Valley before trending
into and across the Nipomo Mesa.
It is unknown the extent to which the Oceano and Santa Maria River faults impede groundwater flow within
the deep aquifer system materials. However, movement on the faults, as mapped by PG&E (2014), may
suggest a possible impediment to flow within the Careaga Sand and possibly the Paso Robles Formation.
PG&E (2014) suggests that the existence of the Santa Maria River Fault is “uncertain.” However, the water
elevation contour maps of the NCMA (Figures 8 and 9, discussed in more detail in Section 3.1.1) may suggest
that the Santa Maria River Fault plays a potential, but unknown, role in groundwater flow across the NCMA.
13 The Plio-Pleistocene-age Paso Robles Formation aquifer consists of unconsolidated deposits ranging from fine to coarse
sand and gravel, silty to clayey sand and gravel, and fine to medium silty sand. Regionally, the formation is
compartmentalized into two to five aquifers zones designated from top to bottom as the A to E Zones. These aquifer zones are
separated by silt and clay confining beds near the coast and are generally merged inland (DWR, 1970).
14 The Pliocene-age Careaga Sand consists of unconsolidated to well-cemented calcareous coarse sand with gravel, fine to
medium sand, and silty sand. The Careaga Sand is of marine origin (DWR, 1970).
Item 11.a. - Page 37
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The Wilmar Avenue Fault generally forms the northern boundary of the NCMA, apparently acting as a barrier
to groundwater flow from the older consolidated materials north of the fault southward into the SMGB. There
is no evidence, however, that the Wilmar Avenue Fault impedes alluvial flow in the Pismo Creek, Meadow
Creek, or Arroyo Grande Creek alluvial valleys.
2.5 Groundwater Flow
The groundwater system of the NCMA has several sources of recharge including precipitation, agricultural
return flow, seepage from stream flow, and subsurface inflow from adjacent areas. Precipitation-driven
recharge is enhanced by several stormwater retention ponds in NCMA.15 According to the DWR Bulletin 63-3
report (DWR, 1970), both the Paso Robles Formation aquifer and the lower confined portion of the Cienega
Valley alluvial aquifer are recharged primarily from subsurface groundwater inflow from the east, where the
overlying confining layers are thin to nonexistent (DWR, 1970). These recharge areas to the east include inland
reaches of Arroyo Grande Valley and portions of Nipomo Mesa (DWR, 1970). The deep aquifer system is also
recharged to a lesser extent by percolation of direct precipitation and agricultural return flow on the Tri-Cities
Mesa (DWR, 1970). In addition, some return flows occur from imported surface supply sources including Lopez
Lake and the California State Water Project (SWP). Discharge in the region is dominated by groundwater
production from pumping wells, but minor discharge certainly occurs through phreatophyte16 consumption
and surface water outflow. Historically, groundwater elevations in wells throughout the NCMA and resulting
hydraulic gradients show that subsurface outflow discharge occurs westward from the groundwater basin to
the ocean. This subsurface outflow is an important control to limit the potential of seawater intrusion. This
westward gradient and direction of groundwater flow still is prevalent throughout the northern portion of
NCMA, although there is some evidence recently that the westward gradient may have reversed in the area
south of Cienega Valley.
The following descriptions of the boundary conditions of the NCMA are derived primarily from Todd (2007). The
eastern boundary is coincident with the SLOFC&WCD Zone 3 management boundary and with the northwestern
boundary of the NMMA. Aquifer materials of similar formation, provenance, and characteristics are present across
most of this boundary, which allows subsurface flow to occur between the NCMA and NMMA.
The northern and northwestern boundary, established by the Court during the 2005 Stipulation, is coincident
with the Wilmar Avenue Fault, which is located approximately along Highway 101 from Pismo Creek to the
southeastern edge of the Arroyo Grande Valley. There is likely insignificant subsurface flow from the
consolidated materials (primarily Pismo Formation) north of the Wilmar Avenue Fault across the boundary into
the SMGB; however, basin inflow occurs within the underflow associated with alluvial valleys of Arroyo Grande
and Pismo creeks.
The southern boundary of the NCMA is an east-west line, roughly located along the trend of Black Lake Canyon
and perpendicular to the coastline. Historically, it appears that groundwater flow is typically roughly parallel to
the boundary. This suggests that little to no subsurface inflow occurs across this boundary.
The western boundary of the NCMA follows the coastline from Pismo Creek in the north to Black Lake Canyon.
Given the generally westward groundwater gradient in the area, this boundary is the site of subsurface outflow
and is an important impediment to seawater intrusion. However, the boundary is susceptible to seawater
15 Within their jurisdictions, Arroyo Grande and Grover Beach each maintain stormwater retention ponds; the SLOFCWCD
maintains the stormwater system, including retention ponds, in OCSD. These ponds collect stormwater runoff, allowing the
runoff to recharge the underlying aquifers.
16 A phreatophyte is a deep-rooted plant that obtains a significant portion of the water that it needs from the water table.
Phreatophytes are plants that are supplied with surface water or the upper portion of the near-surface water table and often
have their roots constantly in touch with moisture.
Item 11.a. - Page 38
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intrusion if groundwater elevations onshore decline, such as may be occurring seasonally in the southeast
portion of NCMA along the boundary with NMMA.
Item 11.a. - Page 39
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Item 11.a. - Page 40
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SECTION 3: Groundwater Conditions
3.1 Groundwater Levels
Groundwater elevation data are gathered from the network of wells throughout the NCMA to monitor the
effects of groundwater use and recharge, and to monitor the threat of seawater intrusion. Over time, analysis
of these groundwater elevation data has included development of groundwater surface contour maps,
hydrographs, and an index of key sentry well water elevations. The historical groundwater elevation data are
provided in Appendix A.
3.1.1 Groundwater Level Contour Maps
Contoured groundwater elevations for the spring (April 2020) and fall (October 2020) monitoring events,
including data from the County monitoring program, are shown in Figures 8 and 9, respectively. From an
increased understanding of the groundwater basin aquifer system and to be consistent with recent work
completed for the Phase 1B model, the groundwater elevation analysis was performed separately for each of
the two principal aquifers. As described earlier (Section 2.4), the two principal aquifers are the deep aquifer
(consisting of the Paso Robles Formation and the Careaga Sand) from which all municipal production is
pumped, and the alluvial aquifer within the Cienega Valley, from which all agricultural production is pumped.
Groundwater level contours for April 2020 are presented in Figure 8. Spring groundwater elevation contours
in the deep aquifer system north of the Santa Maria River Fault show a westerly to southwesterly groundwater
flow. The groundwater gradient and flow in the deep aquifer system in the southern portion of the NCMA are
generally inferred on the basis of historical records, historical trends, and water level data from the NMMA
farther east. This is due to the limited number of wells and water level data in the southernmost portion of the
NCMA that is dominated by sensitive-species dunes and California State Parks land.
Spring groundwater contours in the alluvial aquifer exhibit a gradient and flow direction that generally follows
the alignment of Arroyo Grande Creek. The alluvial groundwater contours also indicate an inflow of
groundwater from the Los Berros Creek drainage (Figure 8).
Agricultural groundwater pumping results in seasonal drawdown of the alluvial aquifer in the Cienega Valley
south and east of Arroyo Grande Creek. As shown on Figure 8, the April 2020 alluvial groundwater elevations
in the Cienega Valley are in the range of below 0 feet to more than 30 feet North American Vertical Datum
1988 (NAVD 88).17 These data show a general decrease in alluvial groundwater elevations from April 2019 to
April 2020 (see Figure 8 from NCMA, 2019) and formation of a subdued pumping trough in the Cienega Valley,
with groundwater elevations generally below sea level in the center of the depression. This formation of a
pumping trough early in the year may be due to a relatively dry January and February preceding the collection
of groundwater elevation measurements in March 2020. Although March 2020 was relatively wet, the
resultant recharge to the alluvial aquifer may have occurred after the March water elevation measurements
were collected.
April 2020 groundwater elevations in the deep aquifer system main production zone along the coast ranged
from 8.0 to 12.0 feet above sea level. A pumping depression occasionally formed in the deep aquifer system
17 Note that NAVD 88 is 2.72 feet lower than mean sea level, as recorded at the Port San Luis tide station datum (available at
https://tidesandcurrents.noaa.gov/datums.html?id=9412110); however, for the purposes of this report it will be referred to
as sea level.
Item 11.a. - Page 41
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Cienega Valley
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Groundwater Elevation Contours Spring 2020
FIGURE 8
Northern Cities Management AreaSan Luis Obispo County, California
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Northern Cities ManagementArea
Cienega Valley
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FIGURE 9
Northern Cities Management AreaSan Luis Obispo County, California
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Groundwater Elevation Contours Fall 2020
29Item 11.a. - Page 43
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north and west of Arroyo Grande Creek in the area of concentrated municipal pumping. This depression
occurred historically mostly in response to the recent drought. This pumping depression has not been observed
since 2017, most likely due to a couple years of above-average rainfall, continued groundwater conservation
efforts, and increased reliance on imported surface water.
Groundwater elevation contours for October 2020 are presented in Figure 9. Fall groundwater contours in the
deep aquifer system north of the Santa Maria River Fault show a generally west-to-southwesterly groundwater
flow, similar to conditions in the spring, but with some minor pumping effects evident in the area of the
municipal wells. Fall groundwater contours in the alluvial aquifer show pumping effects from agricultural
groundwater production, including a pronounced pumping depression in the southeast portion of the Cienega
Valley (Figure 9). Similar to observed trends for spring 2020, the fall alluvial groundwater contours indicate an
inflow of groundwater from the Los Berros Creek drainage (Figure 9).
The alluvial aquifer groundwater conditions in October 2020 shows a decline of approximately 1 to 23 feet
from elevations observed in April 2020. These conditions are consistent with the pumping depressions
observed historically during the fall within the Cienega Valley. The alluvial groundwater elevation in the
pumping depression in October 2020, at 14.4 feet below sea level, was 3.2 feet higher than was present in
October 2019. October 2020 groundwater elevations in the deep aquifer system main production zone along
the coast ranged from 4.8 to 7.0 feet above sea level.
3.1.2 Historical Water Level Trends
Hydrographs of five wells in the NCMA are presented in Figure 10. Two of the wells are completed in the deep
aquifer system (32D03 and 32D11) and three of the wells are completed in the alluvial aquifer within the
Cienega Valley (28K02, 30K03, and 33K03).
The hydrographs for wells 32D03 and 32D11 (Figure 10) are paired hydrographs for deep aquifer system
wells in the vicinity of the municipal wellfields. Depending on the duration of pumping of the municipal wells,
water levels in these wells historically have been below the levels of wells in other areas of the NCMA for
prolonged periods of time. The hydrographs show that, historically, groundwater elevations in these wells
generally have been above mean sea level. In 2007 to 2009, an area of lower groundwater elevations (a
trough) beneath the active wellfield appeared. Groundwater pumping was at its peak in 2007 to 2009 (in
comparison with pumping of the last 30 years) and contributed to the apparent seawater intrusion event in
the coastal wells in 2009.
As illustrated in Figure 10, the water elevations of all the wells, including the paired deep aquifer system wells
32D03 and 32D11, exhibited a steady decline from 2011 to 2016, during which time rainfall was below
normal every year. In this period, groundwater elevations declined to near sea level or, in the case of alluvial
aquifer well 33K03, to below sea level. By October 2016, the groundwater elevations in these wells were
generally below the levels observed in 2009–2010.
However, in 2016 and 2017, all of the wells exhibited an overall increase in water levels (with the exception
of the normal, seasonal decline during the summer). Water levels have remained approximately steady in all
of the wells since 2017. The water level in well 33K03, located near the NCMA/NMMA boundary, is currently
several feet above sea level.
3.1.3 Sentry Wells and the Deep Well Index
Regular monitoring of water elevations in clustered sentry wells located along the coast are an essential tool
for tracking critical groundwater elevation changes at the coast. Groundwater elevations in these wells are
monitored quarterly as part of the sentry well monitoring program. As shown by the hydrographs for the five
sentry well clusters (Figure 11), the sentry wells provide a long history of groundwater elevations.
Item 11.a. - Page 44
FIGURE 10. SELECTED HYDROGRAPHS
Northern Cities Management Area
San Luis Obispo County, California
1990 1995 2000 2005 2010 2015 2020
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P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 10 NCMA Selected Hydrographs.grf *
Well 32D03
Well 32D11
Water Elevation, feet NAVD8832D03 and 32D11
28K02
30K03
33K03
Notes:
NAVD88 - North American Vertical Datum of 1988
31Item 11.a. - Page 45
FIGURE 11. SENTRY WELL HYDROGRAPHS
Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
0
5
10
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Well 24B03
Well 24B02
Water Elevation, feet NAVD88North Beach Campground
Highway 1
Pier Avenue
Oceano Dunes
Well 30F03
Well 30F02
Well 30N02
Well 30N03
Well 36L01
Well 36L02
Flowing Artesian
Flowing Artesian
Flowing Artesian
Notes:
NAVD88 - North American Vertical Datum of 1988
32Item 11.a. - Page 46
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Inspection of the recent data shown in Figure 11 compared with the historical record illustrates some
noteworthy trends:
From 2013 until near the end of 2016, the water level trend of well 30N02—one of the wells that
experienced elevated TDS and chloride levels (i.e., water quality degradation) in 2009–2010—looked quite
similar to the water level trend of the well in 2007–2010, immediately before and during the period of
incipient seawater intrusion. This trend was noteworthy and alarming. However, since the end of 2016
and continuing through 2020, the water level reversed the downward trend and now has water elevations
seasonally fluctuating around 8 feet above sea level.
The decline in water levels from 2005 to 2016 in the Oceano Dunes wells (36L01 and 36L02) was also
notable and potentially significant, particularly in well 36L01, which is screened across the Paso Robles
Formation. In 2016, both wells reached historical low water elevations. However, since late 2016, both
wells have started recovering to less-alarming levels.
The deepest wells in the clusters, 24B03, 30F03, and 30N02, were previously identified as key wells to
monitor for potential seawater intrusion and were suggested to reflect the net effect of changing groundwater
recharge and discharge conditions in the primary production zone of the deep aquifer system. One of the
thresholds to track the status and apparent health of the aquifer is to average the groundwater elevations
from these three deep sentry wells to generate a single, representative index, called the Deep Well Index.
Previous studies suggested a Deep Well Index value of 7.5 feet above sea level as a minimum threshold, or
trigger value, below which the aquifer is at risk for eastward migration of seawater and a subsequent threat
of encroaching seawater intrusion. Historical variation of this index value is represented by the average deep
sentry well elevations in Figure 12.
Inspection of the Deep Well Index in 2008–2009, prior to the period of water quality degradation in wells
30N03 and 30N02, shows that the Deep Well Index dropped below the 7.5-foot trigger value and remained
below that level for almost 2 years. It appears that prolonged levels below the threshold may be causing the
degradation. Since the start of the recent drought in 2011, the Deep Well Index dropped several times below
the threshold, but usually for only a few months at a time.
In 2020, the Deep Well Index started the year above the trigger value with an index value of more than 10 feet
in January. It continued to rise, reached a high more than 12 feet in April, and then began to decline. The index
value dropped down to the 7.5-foot trigger value briefly in mid-October and then immediately began to rise.
The index value continued to rise throughout the end of the year and finished 2020 at about 9 feet above sea
level (Figure 12).
Key wells—including 24B03, 30F03, 30N02, 36L01, 36L02, and 32C03—are instrumented with pressure
transducers equipped with conductivity probes that periodically record water level, water temperature, and
conductivity (Figures 13 through 18). It should be noted that transducer malfunctions have resulted in variable
conductivity data in some of the wells during certain years, including 2015 and 2019. Malfunctioning
transducers have been replaced and continue to be monitored in an ongoing effort to maintain a properly
functioning monitoring network.
Wells 24B03, 30F03, and 30N02 comprise the wells used to calculate the Deep Well Index. Wells 36L01 and
36L02 are adjacent to the coast. Well 32C03 is the easternmost well and adjacent to the boundary between
the NCMA and NMMA. The following discusses 2020 water levels for these key wells:
Deep Well Index Wells: The Deep Well Index wells exhibited a pattern throughout 2020 that is consistent
with previous years. The water levels in wells 24B03, 30F03, and 30N02 generally declined starting in
March or April 2020 and continued to decline into October when they began to rise.
Item 11.a. - Page 47
FIGURE 12. HYDROGRAPH OF DEEP WELL INDEX ELEVATION
Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
-5-4-3-2-101234567891011121314151617181920
Deep Well Index Elevation, feet NAVD88Deep Well Index Elevation
(Wells 24B03, 30F03 and 30N02)
0
100
200
300
400
500
600
700
800
Chloride, mg/LWell 30N02
Well 24B03
Well 30F03
Deep Well Index Threshold: 7.5 feet
Deep Well Index is the average of groundwater
elevations in the deep wells of Sentry Well clusters
24B,30F, and 30N (see Figure 3 for locations of
monitoring wells and Figure 4 for well depths).
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 12 Hydrograph of Deep Well Index Level.grf *
Notes:
NAVD88 - North American Vertical Datum of 1988
mg/L - milligrams per liter
34Item 11.a. - Page 48
FIGURE 13. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 24B03
Northern Cities Management Area
San Luis Obispo County, California
2012 2013 2014 2015 2016 2017 2018 2019 2020
-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880
400
800
1,200
1,600
2,000
SpecificConductivityuS/cmWell 24B03
North Beach Campground Deep Well
Well Depth: 435 feet (Careaga Sand)
Deep Well Index
65
67
69
71
73
TemperatureºFDeep Well Index
Threshold: 7.5 feet
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 13 NCMA Well 24B03.grf
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
35Item 11.a. - Page 49
FIGURE 14. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30F03
Northern Cities Management Area
San Luis Obispo County, California
2012 2013 2014 2015 2016 2017 2018 2019 2020
-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880
400
800
1,200
1,600
2,000
SpecificConductivityuS/cmWell 30F03
Highway 1 Deep Well
Well Depth: 372 feet (Careaga Sand)
Deep Well Index
65
67
69
71
73
TemperatureºFDeep Well Index
Threshold: 7.5 feet
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 14 NCMA Well 30F03.grf *
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
36Item 11.a. - Page 50
FIGURE 15. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30N02
Northern Cities Management Area
San Luis Obispo County, California
-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD882012 2013 2014 2015 2016 2017 2018 2019 2020
0
400
800
1,200
1,600
2,000
SpecificConductivityuS/cmWell 30N02
Pier Avenue Deep Well
Well Depth: 255 feet (Paso Robles Formation)
Deep Well Index
63
65
67
69
71
TemperatureºFP:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 15 NCMA Well 30N02.grf *
Deep Well Index
Threshold: 7.5 feet
Sensor malfunction. Field
measurements indicate that
specific conductivity is stable
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
37Item 11.a. - Page 51
FIGURE 16. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L01
Northern Cities Management Area
San Luis Obispo County, California
2012 2013 2014 2015 2016 2017 2018 2019 2020
-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880
400
800
1,200
1,600
2,000
SpecificConductivityuS/cmWell 36L01
Oceano Dunes Deep Well
Well Depth: 237 feet (Paso Robles Formation)
65
67
69
71
73
TemperatureºFP:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 16 NCMA Well 36L01.grf *
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
38Item 11.a. - Page 52
FIGURE 17. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L02
Northern Cities Management Area
San Luis Obispo County, California
2012 2013 2014 2015 2016 2017 2018 2019 2020
-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880
400
800
1,200
1,600
2,000
SpecificConductivityuS/cmWell 36L02
Oceano Dunes Deep Well
Well Depth: 545 feet (Careaga Sand)
Well 36L02 Manual Measurements
65
67
69
71
73
TemperatureºFP:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 17 NCMA Well 36L02.grf *
Transducer data corrupted
Dashed where inferred
Sensor malfunction. Field measurements indicate that specific conductivity is stable
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
39Item 11.a. - Page 53
FIGURE 18. WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 32C03
Northern Cities Management Area
San Luis Obispo County, California
2012 2013 2014 2015 2016 2017 2018 2019 2020
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Water Elevation, feet NAVD880
400
800
1,200
1,600
2,000
SpecificConductivityuS/cm65
67
69
71
73
TemperatureºFWell 32C03 (County Monitoring Well No. 3)
Well Depth: 170 feet (Paso Robles Formation)
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 18 NCMA Well 32C03.grf *
Notes:
NAVD88 - North American Vertical Datum of 1988
uS/cm - microsiemens per centimeter
40Item 11.a. - Page 54
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GSI Water Solutions, Inc. 41
Also consistent with patterns seen in previous years is the variability of aquifer response among the three
wells. Well 24B03, the northernmost well and located in the North Beach Campground, maintains a
relatively stable and moderated water level throughout the year and consistently sustains groundwater
elevations higher than the Deep Well Index value. The water level in 24B03 mitigates the water levels in
30N02, which typically maintain levels consistently deeper than the Deep Well Index. Well 30F03 generally
closely follows the Deep Well Index value.
Coastal Wells: The groundwater elevation in well 36L01, screened within the Paso Robles Formation,
remained 5 to 9 feet above sea level throughout 2020 and remained stable within the relatively narrow
historical range. The water level in well 36L02, which is screened within the Careaga Sand, illustrates a
much greater seasonal fluctuation than is observed in 36L01. Similar to 2017, 2018, and 2019, the water
elevation in 36L02 remained above sea level throughout 2020, in comparison with 2015 and 2016 when
the water elevation in the well dropped below sea level in late September and remained below sea level
into mid-October.
NCMA/NMMA Boundary: Well 32C03, which shows regular seasonal fluctuations, remained above sea
level throughout all of 2017, 2018, 2019, and 2020, in contrast with the prior 4 years when the water
level dropped below sea level in August and remained at a low elevation until early October.
3.2 Change in Groundwater in Storage
The relative change of groundwater levels and associated change in groundwater in storage in the NCMA
portion of the SMGB between April 2019 and April 2020 were estimated using a comparison of water level
contour maps created for these periods. Separate estimates of change in groundwater in storage were
computed for both the deep aquifer system and for the alluvial aquifer and then summed together to represent
the total NCMA estimated change in groundwater in storage. The comparison of the April water levels was
chosen to comply with DWR reporting requirements and SGMA.
For each aquifer, the groundwater contour lines from each period were compared and the volumetric
difference between the two periods was calculated. The results are presented in Figure 19 and Figure 20,
which show contours of equal difference between April 2019 and April 2020 water elevations in the deep
aquifer system and the alluvial aquifer, respectively. Figure 19 shows that deep aquifer system water
elevations increased in some areas and decreased in others, resulting in a small net increase of groundwater
in storage in the deep aquifer system. Figure 20 shows that alluvial aquifer water elevations generally
decreased within the extent of alluvium in the Cienega Valley, resulting in a net decrease of groundwater in
storage in the alluvial aquifer.
From the change of water levels maps, a volumetric change in groundwater in storage estimate was made for
each aquifer, based on assumed aquifer properties,18 and then summed to represent the total NCMA
estimated change in groundwater in storage. The net changes in groundwater levels in both aquifers
represents a net decrease of groundwater in storage from April 2019 to April 2020 of approximately 500 AF.
18 A storage coefficient of 0.02 was used for the deep aquifer system. This is representative of the Paso Robles Formation
and Careaga Sand in the area, as documented in the SMGB Characterization Project (Fugro, 2015).
A specific yield value for the alluvial aquifer of 0.09 was back-calculated using the 2019 estimated change in alluvial
groundwater in storage represented by the calculated agricultural demand (Section 4.2.1) and an alluvial groundwater
elevation change map representing the total volume change that occurred between April 2019 and October 2019.
Item 11.a. - Page 55
SA
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TPismoCreek
Arroyo Grande Cree kMeadowCreek Los Berros Creek
TarSpringCreek
£¤101
500
00
Date: January 20, 2021 Data Sources: SLO County, USGS, NCMA and NMMA Agencies, California Geological Survey, ESRI
LEGEND
Contour of Equal Difference inWater Level, feet
Area of Net Decline
Area of Net Rise
All Other Features
Northern Cities ManagementArea
Fault (dashed where
inferred)
Interstate
Watercourse
FIGURE 19
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\007_2020_Annual_Report\Annual_Report\Figure19_Water Level Change_April_2019_2020_Deep.mxd
o 0 1
MilesP A C I F I C O C E A N
Change in Groundwater Elevation, Deep Aquifer SystemApril 2019 to April 2020
42Item 11.a. - Page 56
-15SA
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-5-1000PismoCreek
Arroyo Grande Cree kMeadowCreek Los Berros Creek
TarSpringCreek
£¤101
Date: January 20, 2021 Data Sources: SLO County, USGS, NCMA and NMMA Agencies, California Geological Survey, ESRI
LEGEND
Contour of Equal Difference inWater Level, feet
Area of Net Decline
Area of Net Rise
All Other Features
Northern Cities ManagementArea
Fault (dashed where inferred)
Interstate
Watercourse
FIGURE 20
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\007_2020_Annual_Report\Annual_Report\Figure20_Water Level Change_April_2019_2020_Qal.mxd
o 0 1
MilesP A C I F I C O C E A N
Change in Groundwater Elevation, Alluvial AquiferApril 2019 to April 2020
43Item 11.a. - Page 57
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GSI Water Solutions, Inc. 44
3.3 Water Quality
Water is used in several ways in the NCMA, and each use requires a certain minimum water quality. Because
contaminants from seawater intrusion or from anthropogenic sources can potentially impact the quality of
water in the aquifer, water quality is monitored at each of the sentry well locations in the NCMA and County
Monitoring Well No. 3 (32C03).
3.3.1 Quarterly Groundwater Monitoring
Quarterly groundwater monitoring events occurred in January, April, July, and October 2020. During each
event, depths to groundwater were measured, and wells were sampled using procedures, sampling
equipment, and in-field sample preservation protocol pursuant to ASTM International Standard D4448-01.
The water quality data from these events and historical data from these wells are provided in Appendix A.
Graphs of historical chloride and total dissolved solids (TDS) concentrations over time are presented in Figures
21 and 22, respectively, to monitor for trends that may aid in the detection of impending seawater intrusion.
The historical water quality data show that concentration levels of chlorides and TDS, as well as other
constituents, have remained relatively stable within a very narrow historical range since 2009. Improved
management of municipal groundwater use, due to an overall reduction in pumping since 2009, has likely
contributed to the past several years of relatively stable groundwater quality.
Item 11.a. - Page 58
FIGURE 21. CHLORIDE CONCENTRATIONS IN MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
0
100
2000
100
2000
100
2000
100
200
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 21 NCMA Chloride Grouped.grf *
Well 24B03
Well 24B02
Well 30F01Well 30F02
Well 30F03
Well 30N03
Well 30N02
Well 36L02
Well 36L01
Well 32C03Chloride Concentration, mg/LNorth Beach Campground
Highway 1
Pier Avenue
Oceano Dunes and 32C03
Notes:
mg/L - milligrams per liter
45Item 11.a. - Page 59
FIGURE 22. TOTAL DISSOLVED SOLIDS CONCENTRATIONS IN MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
0
500
1,000
1,5000
500
1,000
1,5000
500
1,000
1,5000
500
1,000
1,500
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 22 NCMA TDS Grouped.grf
Well 24B03
Well 24B02
Well 30F01Well
30F02
Well 30F03
Well 30N03
Well 30N02
Well 36L02
Well 36L01
Well 32C03Total Dissolved Solids Concentration, mg/LNorth Beach Campground
Highway 1
Pier Avenue
Oceano Dunes and 32C03
Notes:
mg/L - milligrams per liter
46Item 11.a. - Page 60
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GSI Water Solutions, Inc. 47
3.3.2 Analytical Results Summary
Analytical results of key water quality data, including chloride, TDS, and sodium, were generally consistent with
historical concentrations and observed ranges of constituent concentrations during 2020. In general, no water
quality results were observed that are a cause of concern.
Figure 23 is a Piper diagram, one of several means of graphically representing water quality. There appear to
be three separate water quality types found in the monitoring wells:
1. The Pier Avenue deep well (30N02), screened in the Paso Robles Formation from 175 to 255 feet bgs,
and Oceano Dunes intermediate well (36L01), screened in the Paso Robles Formation from 227 to
237 feet bgs, are screened in the same production zone. This is despite their different nomenclature
as “deep” compared with “intermediate” wells. Relative to the other wells in the area, these two wells
are high in sulfates and have calcium-magnesium-sulfate-rich water. Both wells are relatively low in
chloride. This is significant because this zone, and well 30N02, was the site of an apparent seawater
intrusion event in 2009–2010.
2. The County Monitoring Well No. 3 (32C03), screened from 90 to 170 feet bgs, in the Paso Robles
Formation, has an apparent water quality that is different than any of the other wells in the area. It is
relatively high in sodium, chloride, and potassium. Its location in the right quadrant of the diamond-
shaped part of the Piper diagram (Figure 23) commonly characterizes a sodium-chloride-rich
groundwater representative of marine or deep ancient groundwater, even though it is a relatively
shallow well and screened within the Paso Robles Formation, a Plio-Pleistocene-age alluvial deposit.
Although its overall water quality signature is quite different from seawater, it is more closely
representative of seawater than any of the other wells in the area.
3. All of the other wells in the monitoring network fall into the third category of groundwater water quality.
These wells are all generally a calcium-bicarbonate groundwater that is commonly associated with
shallow groundwater. This grouping of water quality represents groundwater from wells that are
screened in both the Paso Robles Formation and the Careaga Sand (wells 24B03, 30F03, and 36L02
are screened in the Careaga Sand; the others are screened in the Paso Robles Formation).
None of the water quality results from monitoring wells throughout 2020 indicate an incipient episode or
immediate threat of seawater intrusion. Since the decline of TDS, sodium, and chloride concentrations
following the 2009–2010 seasons, it is also clear that the location and inland extent of the seawater-fresh
water interface is not known, except for the apparent indication that it was detected in well 30N02, 30N03,
and OCSD MW-Blue, all of which are screened in the Paso Robles Formation. No indications of seawater
intrusion have been observed in wells screened in the underlying Careaga Sand. At this time, without additional
offshore data, the location of the interface or mixing zone is not known and will not be known unless and until
it intercepts a monitoring well. The airborne electromagnetic survey conducted in 2020 (Section 1.7.4) is
expected to provide important information regarding the seawater-fresh water interface.
Item 11.a. - Page 61
FIGURE 23.
PIPER DIAGRAM OF WATER QUALITY IN SELECT MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 23 NCMA Piper Diagram.grf100806040200Ca10080604020Na+K100
80
60
40
20
0 Mg020406080100Cl
100
80
60
40
20
0SO410080604020HCO3+CO38060402080604020Carbonate (CO3) + Bicarbonate (HCO3)Cal
c
i
um
(Ca)
+ Magnes
i
um
(Mg)Sulfate (SO4) + Chloride (Cl)Sodi
um
(Na)
+ Pot
as
s
i
um
(K)
Seawater Base
Well 24B02
Well 24B03
Well 30F02
Well 30F03
Well 30N02
Well 30N03
Well 36L01
Well 36L02
Well 31H11 (Blue)
Well 32C03
Note: Data include "middle" and "deep" wells from 2020 quarterly sampling events.
48Item 11.a. - Page 62
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GSI Water Solutions, Inc. 49
SECTION 4: Water Supply and Production/Delivery
4.1 Water Supply
The NCMA water supply consists of three major sources including Lopez Lake, the SWP, and groundwater.
Each source of supply has a defined delivery volume that varies from year to year.
4.1.1 Lopez Lake
The Lopez Project consists of Lopez Lake, Lopez Dam, Lopez Terminal Reservoir, and Lopez Water Treatment
Plant and is operated by SLOFCWCD Zone 3. SLOFCWCD Zone 3 provides treated water directly to the Zone 3
contractors and releases water to Arroyo Grande Creek for habitat conservation and agricultural use. The Zone
3 contractors include Arroyo Grande, Grover Beach, Pismo Beach, Oceano CSD, and CSA 12, which serves
Avila Beach and is not in the NCMA.
The operational safe yield of Lopez Lake is 8,730 acre-feet per year (AFY), which reflects the amount of
sustainable water supply during a drought of defined severity. Of this, 4,530 AFY is apportioned to the
contractors and 4,200 AFY is reserved for downstream releases to maintain flows in Arroyo Grande Creek and
provide groundwater recharge. The 2020 SLOFCWCD Zone 3 allocations are shown in Table 2.
Table 2. Lopez Lake (SLOFCWCD Zone 3 Contractors) Water Allocations (AFY)
Contractor Normal Water Allocation,
(AFY)
City of Arroyo Grande 2,290
City of Grover Beach 800
City of Pismo Beach 892
Oceano CSD 303
CSA 12 (not in NCMA) 245
Total 4,530
Downstream Releases 4,200
Safe Yield of Lopez Lake 8,730
Notes
AFY = acre-feet per year, CSA = County Service Area CSD = Community Services District
SLOFCWCD = County of San Luis Obispo Flood Control & Water Conservation District
NCMA = Northern Cities Management Area
In December 2014, SLOFCWCD Zone 3 adopted the Low Reservoir Response Plan (LRRP). The LRRP
establishes actions that SLOFCWCD Zone 3 can take when the amount of water in storage in the reservoir
drops below 20,000 AF, provided that the SLOFCWCD Board of Supervisors declares a drought emergency.
The purpose of the LRRP is to limit downstream releases and municipal diversions from Lopez Lake to preserve
water within the reservoir, above the minimum pool, for a minimum of 3 to 4 years under drought conditions.
The reduction strategies for the LRRP are tied to the amount of water in the reservoir. As the amount of water
in the reservoir drops below the triggers (20,000; 15,000; 10,000; 5,000; and 4,000 AF), the hydrologic
conditions are reviewed, and adaptive management is used to meet the LRRP objectives. The municipal
diversions are to be reduced according to the strategies shown in Table 3.
Item 11.a. - Page 63
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Table 3. Lopez Lake Municipal Diversion LRRP Reduction Strategy
Amount of Water
in Storage (AF)
Municipal Diversion
Reduction AFY
20,000 0% 4,530
15,000 10% 4,077
10,000 20% 3,624
5,000 35% 2,941
4,000 100% 0
Notes
AF= acre-feet, AFY = acre-feet per year
The mandatory actions after the LRRP is enacted include (1) reductions in entitlement water deliveries; (2)
reductions in downstream releases; (3) no new allocations of surplus water from unreleased downstream
releases; and (4) extension of time that agencies can take delivery of existing unused water throughout the
duration of the drought emergency, subject to evaporation losses if the water is not used in the year of original
allocation. Included in the LRRP is an adaptive management provision that allows modification of the terms
of the LRRP to match the initially prescribed reductions based on actual hydrologic conditions.
The downstream releases are to be reduced according to the strategies described in Table 4. The release
strategies represent the maximum amount of water that can be released. The SLOFCWCD Zone 3 controls the
timing of the reduced releases to meet the needs of the agricultural stakeholders and to address
environmental requirements.
Table 4. Lopez Lake Downstream Release LRRP Reduction Strategy
Amount of Water
in Storage (AF)
Downstream Release
Reduction AFY
20,000 9.5% 3,800
15,000 9.5% 3,800
10,000 75.6% 1,026
5,000 92.9% 300
4,000 100% 0
Notes
AF= acre-feet, AFY = acre-feet per year
The LRRP was put into effect on April 1, 2015. Throughout 2015 and all of 2016, SLOFCWCD Zone 3 operated
Lopez Lake pursuant to the 15,000 AF diversion reduction trigger that required a 10 percent reduction in
municipal diversions. The 10,000 AF trigger requiring a 20 percent reduction was avoided because agencies
enacted mandatory water conservation measures and utilized other sources of water including some minimal
rainfall and SWP water. Lopez Lake recovered from a low of 11,000 AF in storage to a peak of more than
30,000 AF in May 2017, ending with approximately 25,000 AF at the start of 2018 because of the relatively
heavy rainfall year of late 2016 and early 2017. Although contractually the LRRP is no longer in effect when
both triggers are rescinded (i.e., the Board of Supervisors declaration of water emergency and reduction of
reservoir levels to below 20,000 AF), the SLOFCWCD Zone 3 agencies resolved to keep the LRRP in effect.
Item 11.a. - Page 64
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Because the reservoir volume was above 20,000 AF, no mandatory reductions in municipal deliveries were
required in 2017, 2018, or 2019.
In 2020, the reservoir storage level stayed above 20,000 AF until December, when it reached a level of 19,826
AF. The 2020 high storage level of the reservoir occurred in April, at 25,696 AF. Although the reservoir dropped
slightly below the 20,000 AF mark in December, there were no mandatory reductions in municipal deliveries
in 2020. The status of the reservoir and management actions related to the LRRP will be monitored throughout
2021 and adjusted accordingly based on winter 2021 rainfall and storage in Lopez Lake.
The total discharge from Lopez Lake in 2020 was 7,834 AF, of which 4,740 AF were delivered to NCMA
contractors, 136 AF were delivered to CSA 12, and 2,958 AF were released downstream to maintain flow in
Arroyo Grande Creek (Table 5).
When management of releases results in a portion of the 4,200 AFY remaining in the reservoir, or the
contractors do not use their full entitlement for the year, the water is offered to the contractors as surplus
water. Surplus water deliveries to the NCMA agencies in 2020 equaled 611 AF (Table 5).
Table 5. Lopez Lake Deliveries, 2020
Contractor 2020 Allocation
Usage (AF)
2020 Surplus
Usage (AF)
2020 Total Lopez
Lake Water
Delivery (AF)
Arroyo Grande 2,242 0 2,242
Grover Beach 789 0 789
Pismo Beach 795 250 1,045
Oceano CSD 303 361 664
Total NCMA 2020 Usage 4,129 611 4,740
CSA 12 (not in NCMA) 136 0 136
Downstream Releases 2,958 -- 2,958
Total 2020 Lopez Lake
Deliveries 7,223 611 7,834
Notes
AF= acre-feet CSD = Community Services District NCMA = Northern Cities Management Area
Source: SLOFCWCD Zone 3 Monthly Operations Reports
4.1.2 State Water Project
Pismo Beach and OCSD have contracts with SLOFCWCD Zone 3 to receive water from the SWP. The SLOFCWCD
serves as the SWP contractor and provides imported water to local retailers through the SWP Coastal Branch
(Coastal Branch) pipeline. Pismo Beach and OCSD, as subcontractors to SLOFCWCD, have annual contractual
water delivery allocations, commonly referred to as Table A water, of 1,240 19 AFY and 750 AFY, respectively
(Table 6). In addition to its Table A allocation, Pismo Beach holds 1,240 AFY of additional allocation known as
“drought buffer” and OCSD holds an additional allocation of 750 AFY of drought buffer. The additional drought
buffer allocation held by the agencies is available to augment the SWP water supply when the SWP annual
19 100 AF of which is owned by a private party.
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allocation, i.e., percentage of SWP water available, is less than 100 percent. The additional allocations also
increase each agency’s water held in storage. In any given year; however, Pismo Beach’s and OCSD’s total
SWP deliveries cannot exceed 1,240 AF and 750 AF, respectively.
Table 6. NCMA SWP Deliveries, 2020
Agency Table A
Allocation, AFY
Drought
Buffer, AFY 2020 Delivery, AF
City of Arroyo Grande -- -- --
City of Grover Beach -- -- --
City of Pismo Beach1 1,140 1,240 677
Oceano CSD 750 750 60
Total Allocation/Usage, AFY 1,850 1,990 737
Notes
1 Pismo Beach contracts for 1,240 AF of Table A water from the SWP, but 100 AF are owned by private parties.
AF=acre feet AFY= acre-feet per year CSD = Community Services District
NCMA = Northern Cities Management Area
The SWP annual allocation for all contractors throughout California (including SLOFCWCD, Pismo Beach and
Oceano CSD) for 2020 was initially set on December 2, 2019, at 10 percent of the Table A contractual
allocation. The 2020 SWP allocation was then increased two times in 2020: to 15 percent on January 24 and
to 20 percent on May 22. SWP contractors can store undelivered Table A water at the SWP facility in San Luis
Reservoir (limitations exist on the amount that can be stored in any one year). This stored water is called
“carryover water” and can be delivered in subsequent years, but total annual deliveries cannot exceed their
Table A allocation due to capacity restrictions in the Coastal Branch. In addition, carryover water can be lost
(or “spilled”) if its storage interferes with storage of current-year SWP water for project needs.
For 2021, the initial allocation of the SWP contractors was set at 10 percent of Table A contractual allocation
amounts on December 1, 2020.
The SWP supply has the potential to be affected by drought and environmental issues, particularly because of
the endangered Delta smelt in the Sacramento-San Joaquin Delta (Delta). However, OCSD and Pismo Beach
as well as the other SLOFCWCD subcontractors have not been negatively affected to date by reduced SWP
supplies because of the SLOFCWCD’s large amount of unsubscribed Table A allocation which has been used
to fulfill subcontractors’ requests, even in dry years. Therefore, even when SWP supplies are decreased, the
SLOFCWCD’s unsubscribed allocation and any carryover water in San Luis Reservoir provides a buffer so that
contracted volumes to subcontractors such as OCSD and Pismo Beach may still be provided in full. During
2020, Pismo Beach took delivery of 677 AF of SWP water and OCSD took delivery of 60 AF of SWP water.
4.1.3 Groundwater
The 2008 Judgment and the 2002 Settlement Agreement govern the use of groundwater in the NCMA and
establish that groundwater will continue to be allotted and independently managed by the NCMA agencies,
NCMA overlying owners, and SLOFCWCD (collectively known as the Northern Parties). Each of the NCMA
agencies has the capability to extract groundwater from municipal water supply wells located in the central
and northern portions of the NCMA (Figure 24). Groundwater also satisfies agricultural irrigation and rural
domestic use throughout the NCMA.
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The calculated, consensus safe yield value of 9,500 AFY for the NCMA portion of the SMGB was included in
the 2002 Settlement Agreement through affirmation of the 2001 Groundwater Management Agreement
among the NCMA agencies. The basis of the safe yield was established in 1982 by a Technical Advisory
Committee, consisting of representatives from Arroyo Grande, Grover Beach, Pismo Beach, OCSD, Avila Beach
Community Water District, Port San Luis Harbor District, the Farm Bureau, and the County to deal with a safe
yield allocation strategy and agreement not to exceed the safe yield of what was then called the Arroyo Grande
Groundwater Basin. The basis for the committee's analysis was DWR (1979). The Technical Advisory
Committee concluded that the safe yield was 9,500 AFY. These findings and the allocation of the safe yield
were incorporated into a voluntary groundwater management plan (1983 Gentlemen’s Agreement) and further
formalized in the 2002 Settlement Agreement and the 2005 Stipulation.
The 9,500 AFY safe yield provides allotments for agricultural irrigation of 5,300 AFY, subsurface outflow to the
ocean of 200 AFY, and urban use entitlement of 4,000 AFY. The volume of the entitlement for urban use was
subdivided as follows:
Arroyo Grande: 1,202 AFY
Grover Beach: 1,198 AFY
Pismo Beach: 700 AFY
OCSD: 900 AFY
The safe yield allotment for agricultural irrigation is significantly higher than the actual historical agricultural
irrigation demand and the calculated amount for subsurface outflow is unreasonably low. Todd (2007)
recognized that maintaining sufficient subsurface outflow to the coast and preservation of a westward
groundwater gradient is essential to preventing seawater intrusion. A regional outflow of 3,000 AFY was
estimated as a reasonable approximation (Todd, 2007) although the minimum subsurface outflow necessary
to prevent seawater intrusion is unknown.
The 2001 Groundwater Management Agreement provides that groundwater entitlements of each of the urban
agencies can be increased when land within the corporate boundaries is converted from agricultural use to
urban use, which is referred to as an agricultural conversion credit. Agricultural conversion credits equal to
121 AFY and 209 AFY were developed in 2011 for Arroyo Grande and Grover Beach, respectively. These
agricultural credits were unchanged during 2020.
Total groundwater production in the NCMA, including agricultural irrigation and rural uses, is shown in Table 7
(descriptions of agricultural irrigation applied water and rural use estimation are provided in Sections 4.2.1
and 4.2.2, respectively). The total estimated groundwater pumpage in 2020 from the NCMA portion of the
SMGB was 3,064 AF.
Item 11.a. - Page 67
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LEGEND
!R City of Arroyo Grande Well
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!R Oceano Community Services District Well
Northern Cities Management Area Faults (dashed where inferred)Streams
Locations of MunicipalProduction Wells
FIGURE 24
Northern Cities Management AreaSan Luis Obispo County, California
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PacificOcean
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Table 7. NCMA Groundwater Entitlement and Production from Santa Maria Groundwater Basin, 2020
Total Entitlement/Use Groundwater Entitlement +
Ag Conversion Credit (AF)
2020
Groundwater Use
from SMGB (AF)
Total Urban Groundwater
Entitlement /Use 4,000 + 330 = 4,330 613
Total NCMA Groundwater
Entitlement /Use 9,500 3,064
Notes
AF= acre-feet Ag = agriculture SMGB = Santa Maria Groundwater Basin CSD = Community Services District
4.1.4 Developed Water
The 2005 Stipulation states that “developed water” is “groundwater derived from human intervention” and
states that this includes infiltration from the following sources: “Lopez Lake water, return flow, and recharge
resulting from storm water percolation ponds.” Return flow results from deep percolation of water used in
irrigation that is more than the requirement of the plant. Return flows have not been estimated recently but
would be considered part of the groundwater basin inflow.
In 2008, Arroyo Grande, Grover Beach, and Pismo Beach prepared stormwater management plans. To control
stormwater runoff and to increase groundwater recharge, each city now requires that new development
construct onsite retention or detention ponds. As these new ponds or basins are constructed, the increase in
groundwater recharge could result in recognition of substantial augmentation of basin yield and provision of
recharge credits to one or more of the NCMA agencies (Todd, 2007). Thus, a re-evaluation of estimated
stormwater recharge is warranted as new recharge facilities are installed and as additional information on
flow rates, pond size, infiltration rates, and tributary watershed area becomes available. Pursuant to the 2001
Groundwater Management Agreement, calculation of recharge credits would be based on a mutually accepted
methodology to evaluate the amount of recharge, including quantification of factors such as Lopez Lake and
SWP recharge, stormwater runoff amounts, determination of effective recharge under various conditions, and
methods to document actual recharge to developed aquifers.
4.1.5 Other Supplies
Arroyo Grande owns three water wells that are located outside the SMGB and pump groundwater from the
Pismo Formation, which is the geologic bedrock unit in the area. Two of the wells are pumped by the City and
used for municipal consumption; the third well is likely to be used in the future. There is no established
allocation that limits the volume of groundwater that Arroyo Grande can pump from these wells, but for
planning purposes the City assumes that they can pump up to 160 AFY for municipal use. The volume that
Arroyo Grande pumps from these wells varies from year to year and is included in summary totals for urban
water use, but the volume is not included in the summary totals for SMGB production.
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4.1.6 Total Water Supply Availability
The baseline, or full allocation, water supply available to the NCMA agencies is summarized in Table 8. The
baseline water supplies include 100 percent Lopez Lake allocation, SMGB groundwater entitlements,
agricultural credits, and 100 percent delivery of SWP allocations. This baseline water supply does not include
Lopez Lake surplus or SWP carryover, because these supplies vary from year to year and are not always
available. The category “Other Supplies” includes groundwater pumped from outside the NCMA boundaries
(outside the SMGB). The baseline supply for the NCMA agencies totals 10,625 AFY.
Table 8. Baseline (Full Entitlement) Available Urban Water Supplies (AFY)
Agency Lopez
Lake
SWP Allocation
(at 100%)
Groundwater
Entitlement Ag Credit Other
Supplies Total
City of Arroyo
Grande 2,290 0 1,202 121 160 3,773
City of Grover Beach 800 0 1,198 209 0 2,207
City of Pismo Beach 892 1,100 700 0 0 2,692
Oceano CSD 303 750 900 0 0 1,953
Total 4,285 1,850 4,000 330 160 10,625
Notes
AFY= acre-feet per year Ag = agriculture CSD = Community Services District SWP = State Water Project
Table 9 summarizes the available water supply to the NCMA agencies in 2020, including Lopez Lake, Lopez
Lake carryover (surplus) water, the 2020 SWP 20 percent Table A delivery schedule, and the available SWP
carryover water. The total available water supply is a compilation of all components of each agency’s portfolio.
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Table 9. Available Urban Water Supply, 2020
Agency Lopez Lake
Allocation
Lopez Lake
Surplus
2020 SWP
Allocation with
Drought Buffer
(at 20% Delivery)
2020
SWP
Carryover
Groundwater
Entitlement
Ag
Credit
Other
Supplies Total, 2020
Arroyo Grande 2,290 911 0 0 1,202 121 160 4,684
Grover Beach 800 318 0 0 1,198 209 0 2,525
Pismo Beach 892 355 4681 1,2402 700 0 0 3,1871
Oceano CSD 303 121 3001 7502 900 0 0 2,0741
Total 4,285 1,705 768 1,990 4,000 330 160 12,470
Notes
All units in acre-feet (AF)
1 In any given year, Pismo Beach’s total SWP deliveries cannot exceed 1,240 AF and OCSD’s deliveries cannot exceed 750 AF. In years when the Table A SWP allocation, plus
drought buffer, plus carryover exceed 1,240 AF for Pismo Beach and 750 AF for OCSD, the total available SWP supply is capped at 1,240 AF for Pismo Beach and 750 AF for OCSD.
2 Based on personal communication with Wes Thomson, SLOFCWCD, on January 13, 2021.
AF = acre-feet CSD = Community Services District SWP = State Water Project
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4.2 Water Use
Water use refers to the total amount of water used to satisfy the needs of all water user groups. In the NCMA,
water use predominantly serves urban production and agricultural applied water; a relatively small component
of rural domestic use, including small community water systems; and domestic, recreational, and agriculture-
related businesses.
4.2.1 Agricultural Water Supply Requirements
For the 2020 Annual Report, the applied irrigation demand estimations were updated using the 2015
Integrated Water Flow Model (IWFM) Demand Calculator (IDC). The IDC is a stand-alone program that
simulates land surface and root zone flow processes, and, importantly for this report, the agricultural water
supply requirements for each crop type. IDC applies user-specified soil, weather, and land-use data to estimate
and track the soil moisture balances. More specifically, available water within the root zone is tracked for each
of the crops to simulate when irrigation events take place based on crop requirements and cultural irrigation
practices. The data used in the IDC program for NCMA along with their respective sources are described below.
Data Used in the IDC
Land-use Information. The San Luis Obispo County Agricultural Commissioner’s Office compiles an annual
estimate of irrigated acres in the County. A view displaying the irrigated agricultural lands within NCMA for
2020 is shown in Figure 25. The 2020 survey indicates a total of 1,474 acres of irrigated agriculture in
the NCMA consisting predominantly of rotational crops. Table 10 lists the crop types and acreages found
in the NCMA that were used in the IDC program.
Climate Data. 2020 weather data from the SLOFCWCD rain gauge in Oceano and the CIMIS Nipomo
Station were used for precipitation and data related to reference ET values, respectively. The data needed
to calculate reference ET values include solar radiation, humidity, air temperature, and wind speed. Both
weather stations are shown in Figure 6.
ET Values by Crop Category. The DWR Consumptive Use Program (CUP) was used to estimate potential ET
values based on specific annual climate data and crop type. The CUP used monthly climate data from the
closest CIMIS station (Nipomo station) and includes crop coefficients to calculate ET values for the
irrigated crop categories.
Item 11.a. - Page 72
ARROYOGRANDEGROVERBEACH
PISMOBEACH
OCEANO
ArroyoGrandeCreekPismoCreekMeadowCreek TarSpringCreek
Los BerrosCreek GovernorEdmundGBrown
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Date: January 26, 2021 Data Sources: SLO County, NCMA, ESRI, USGS
LEGEND
Avocados
Rotational Crops
Strawberries
All Other Features
Highway
Watercourse
Northern Cities Management Area
NCMA Agricultural Land 2020
FIGURE 25
Northern Cities Management AreaSan Luis Obispo County, California
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Assumptions used in the analysis include the following:
As the NCMA is located near the coast, agricultural practices are influenced significantly by the marine
layer, a mass of air that may be of lower temperature and have higher humidity than air over inland areas.
As seen in Figure 6, the Nipomo CIMIS station used for climatological data in both the CUP and IDC is
located farther inland than the easternmost boundary of NCMA and the recorded weather data does not
fully account for the cooling and moisture effects of the marine layer.
Use of an unadjusted calculated ET value results in a higher ET value than that is actually taking place in
the NCMA. Studies 20 have identified that ET values within the influence of the marine layer can be as much
as 20 to 25 percent lower than ET values for the same crop located just outside of the marine layer
influence. The distance the marine layer extends inland can vary from less than one-half mile to as much
as 4 to 5 miles, depending on land topography. Low-lying areas have a higher frequency of marine layer
coverage and for longer periods throughout the day.
The NCMA is considered a low-lying area with boundaries extending between 2 and 5 miles inland.
Recognizing that not all the crops would be affected by the marine layer but accounting for the cooling
influence over some of the area, monthly ET values calculated based on the CIMIS Nipomo Station data
were adjusted lower by 12 percent21 and are shown in Table 10.
Soil Data. The Natural Resources Conservation Service Soil Survey Geographic Database was used to
collect soil parameters in the NCMA for use in the IDC. The soil properties used include saturated hydraulic
conductivity, porosity, and the runoff curve numbers. The field capacity and wilting points were developed
on the basis of the described soil textures (i.e., sand, loam, sandy clay) and industry standards. The IDC
relies on soil properties for estimating water storage, deep percolation, and runoff; all of which lead to a
refined estimation of applied water.
Table 10. NCMA Crop Acreages and Calculated Evapotranspiration, 2020
Crop Type Acreage 2020 Potential ET1
(AF/Acre)
Rotational Crops 1,113 1.92
Strawberries 317 0.8
Avocados 45 1.8
Notes
1 See ET Values by Crop Category, in text section above.
2 Rotational crop ET is based on a rotation of two to three crops.
ET = evapotranspiration AF = acre-feet
Model Development and Computations
The IDC is written in FORTRAN 2003 using an object-oriented programming approach. The program consists
of three main components: (1) input data files, (2) output data files, and (3) the numerical engine that reads
data from input files, computes applied water demands, routes water through the root zone, and exports the
results to the output files. The flow terms used in the root zone routing are defined in Table 11 and shown in
20 Irrigation Training and Research Center <http://www.itrc.org/etdata/etmain.htm> (Cal Poly, 2019) provides typical-year
(1997 Hydrology) ET values using various irrigation methods for Zone 3, the coastal outside marine layer; and Zone 1, the
marine layer. The computed percentage reduction in ET to Zone 3 values range from 11 percent for rotational crops (small
vegetables) to 19 percent for strawberries.
21 A single ET reduction value is used based on changing location and rotation of crop types relative to influence of marine
layer.
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the graphic below the table. Drainage from ponded areas (Dr) was not applicable because there are no ponded
crops in the NCMA; data related to generic soil moisture (G) were not available.
Table 11. Flow Terms Used in Root Zone Routing for IDC Model
Abbreviation Term Notes
P Precipitation User Specified
ET Evapotranspiration IDC Output
G Generic source of moisture (i.e., fog, dew) Data Not Available
Aw Applied water IDC Output
Dr Outflow resulting from drainage of ponded
areas (e.g., rice, refuges) Not Applicable
RP Direct runoff IDC Output
Rf Return flow User Specified (fraction of applied water)
U Re-used portion of return flow User Specified (fraction of return flow)
D Deep percolation IDC Output
Notes
Integrated Water Flow Model (IWFM) Demand Calculator (IDC) (DWR, 2016)
Source: California DWR (2016).
All extracted geospatial information was applied to a computational grid within the IDC framework to simulate
the root zone moisture for 2020 in NCMA agricultural areas. The IDC provides the total water supply
requirement for each crop category met through rainfall and applied irrigation water in agricultural areas based
on user-defined parameters for crop evaporation and transpiration requirements, climate conditions, soil
properties, and agricultural management practices. The sources for data related to crop demands (i.e.,
potential ET), climate conditions, and soil properties are discussed above. The computations for actual crop
ET (versus potential ET), applied water, and deep percolation are described below.
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The potential ET is the amount of water a given crop will consume through evaporation and/or transpiration
under ideal conditions (i.e., fully irrigated 100 percent of the time). Fully irrigated conditions mean that the
water required to meet all crop demands is available. Water is available to the crops when the soil moisture
content within the root zone is between the field capacity and the wilting point. When the soil moisture is above
the field capacity, some water will go to runoff and/or deep percolation; when the soil moisture is below the
wilting point, it is contained in the smallest pore spaces within the root zone and considered unavailable to
the crops.
The difference between the field capacity and the wilting point is the total available water (TAW). In IDC, when
the soil moisture is above one-half of the TAW, the crop ET will be equal to the potential ET. However, if the
soil moisture is below one-half of the TAW, the plants will experience water stress and ET decreases linearly
until it reaches zero at the wilting point. This method of simulating water stress is similar to the method
described in Allen et al. (1998) to compute non-standard crop ET under water stress conditions.
The IDC monitors the moisture content within the root zone and applies water by triggering an irrigation event
when the calculated soil moisture is below a user-specified minimum allowable soil moisture requirement. For
this application of the IDC, the minimum soil moisture requirement was set to trigger an irrigation event when
the soil moisture fell below one-half the TAW to limit water stress in the crops. During an irrigation event, the
soil moisture content in the root zone reaches field capacity. If precipitation occurs, soil moisture may increase
above field capacity, generating deep percolation and potentially runoff, both depending on the quantity and
temporal distribution of rainfall.
Deep percolation is the vertical movement of water through the soil column flowing out of the root zone
resulting in the potential for groundwater recharge. The IDC applies the van Genuchten-Mualem equation
(Mualem, 1976; van Genuchten, 1985) to compute deep percolation using the user-defined saturated
hydraulic conductivity and pore size distribution.
Results
The total agricultural water supply requirements for 2020 was estimated to be 2,308 AF, and the effective
precipitation (i.e., rainwater used by the crop) was 506 AF. Figure 26 illustrates the estimated crop water
requirement in the NCMA as calculated by the IDC and displays the three identified crop types and their
estimated monthly applied water. The rotational crops have the highest water supply requirements because
they cover the greatest area (see Figure 25) and have the greatest annual ET (Table 12).
The estimated agricultural water supply requirement of 2,308 AF in 2020 is comparable to the estimated
2,506 AF in 2019; 2,651 AF in 2018; 2,536 AF in 2017; 2,494 AF in 2016; 3,008 AF in 2015; and 2,955 AF
in 2014. In 2014, the methodology of estimating agricultural water requirements was modified from an
estimated applied rate based on hydrologic conditions to the IWFM IDC methodology described here.
Item 11.a. - Page 76
P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 24 2017 NCMA Estimated Agricultural Water Demand and Monthly Precipitation at the CIMIS Nipomo Station
FIGURE 26.
2020 ESTIMATED AGRICULTURAL WATER DEMAND AND MONTHLY PRECIPITATION AT THE SLO NO. 795 GAUGE
Northern Cities Management Area
San Luis Obispo County, California
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Table 12. IDC Model Results of Monthly Applied Water, 2020
Monthly Applied Water (AF) Annual Total (AF)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rotational Crops -- -- 3 114 239 320 324 356 244 199 193 -- 1,990
Strawberries -- -- -- -- -- 43 45 79 62 44 -- -- 273
Avocados -- -- -- -- -- 4 10 10 8 7 5 2 45
Total 0 0 3 114 239 367 379 444 314 250 198 2 2,308
Monthly Precipitation (inches) Annual Total
(inches) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation 0.55 -- 6.18 1.34 0.24 0.04 -- -- -- 0.04 0.43 1.22 10.04
Monthly Unit Water Demand (AF/Acre) Annual Total
(AF/Acre) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rotational Crops -- -- 0.00 0.10 0.21 0.29 0.29 0.32 0.22 0.18 0.17 -- 1.79
Strawberries -- -- -- -- -- 0.14 0.14 0.25 0.20 0.14 -- -- 0.86
Avocados -- -- -- -- -- 0.09 0.22 0.22 0.18 0.16 0.12 0.04 1.00
Area Weighted Average 0.00 0.00 0.00 0.08 0.16 0.25 0.26 0.30 0.21 0.17 0.13 0.00 1.57
Notes
AF = acre-feet AF/Acre = acre-feet per acre
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4.2.2 Rural Use
In the NCMA, rural water use refers to groundwater pumping not designated as urban use or agricultural
irrigation applied water and includes small community water systems, individual domestic water systems,
recreational uses, and agriculture-related business systems. Small community water systems using
groundwater in the NCMA were identified initially through a review of a list of water purveyors compiled in the
2007 County IRWMP. These include the Halcyon Water System, Ken Mar Gardens, and Pacific Dunes RV
Resort. The Halcyon Water System serves 35 homes in the community of Halcyon, and Ken Mar Gardens
provides water supply to 48 mobile homes on South Halcyon Road. The Pacific Dunes RV Resort, with 215 RV
sites, provides water supply to a largely transitory population and a nearby riding stable. In addition, an
inspection of aerial photographs of rural areas within NCMA has identified about 25 homes and businesses
that are served by private wells. Two mobile home communities, Grande Mobile and Halcyon Estates, are
served by OCSD through the distribution system of Arroyo Grande. Therefore, the production summary of OCSD
includes these two communities. Based on prior reports, it is assumed that the number of private wells is
negligible within the service areas of the NCMA agencies.
The Pismo Beach Golf Course uses an onsite water well for turf irrigation. The pumped water is not metered,
and the golf course operators do not know the total water use. An estimate of water demand for the golf course
is based on the irrigated acreage, sandy soils, near-ocean climate, and water duty factors from the U.S. Golf
Association, Alliance for Water Efficiency, U.S. Golf Courses Organization of America, and several other
sources. The estimated rural water demand is provided in Table 13.
Table 13. Estimated Rural Water Production, 2020
Groundwater User No. of Units
Estimated Water
Production,
AFY per Unit
Estimated Annual
Water Production,
AF
Notes
Halcyon Water System 35 0.40 14 1
Ken Mar Gardens 48 -- 7 2
Pacific Dunes RV Resort 215 0.03 6 3
Pismo Beach Golf Course -- -- 45 4
Rural Users 25 0.40 10 1
Current Estimated Rural Production 82
Notes
1 Water use/unit based on 2000 and 2005 Grover Beach water use per connection, 2005 UWMP.
2 Demand based on metered water usage.
3 Water use/unit assumes 50 percent annual occupancy and 0.06 AFY per occupied site.
4 Estimated golf course demand, based on estimated water duty factor, annual ET, and irrigated acreage.
AF=acre feet AFY = acre-feet per year
ET = evapotranspiration UWMP = Urban Water Management Plan
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4.2.3 Urban Production for Potable Use
Urban water production for potable use is presented in Table 14 for each of the NCMA agencies from 2005
through 2020. These values reflect Lopez Lake deliveries, SWP deliveries, groundwater production data, and
system losses, and represent all water used within the service areas of the four NCMA agencies. In the last 15
years, urban water production has ranged from 5,476 AF (2016) to 8,982 AF (2007). There has been an
overall decline in urban production since 2007, although there were slight increases in 2012, 2013, 2017,
and 2018. The long-term declining trend in production is likely attributed to the relatively slow economy from
2009 through 2012 and conservation activities implemented by the NCMA agencies in response to the
historical drought. Since 2013, when urban production was 7,939 AF, urban production declined dramatically
to 2016 to the lowest level in at least the past 20 years. The urban production increased slightly in 2017 and
2018 but declined in 2019 to 5,660 AF.
Table 14. Historical Urban Water Production for Potable Use (Groundwater and Surface Water)
Year Arroyo
Grande
Grover
Beach
Pismo
Beach
OCSD Total
Urban
Percentage of 2013
Production1
2005 3,460 2,082 2,142 931 8,615 —
2006 3,425 2,025 2,121 882 8,453 —
2007 3,690 2,087 2,261 944 8,982 —
2008 3,579 2,051 2,208 933 8,771 —
2009 3,315 1,941 2,039 885 8,180 —
2010 2,956 1,787 1,944 855 7,542 —
2011 2,922 1,787 1,912 852 7,473 —
2012 3,022 1,757 2,029 838 7,646 —
2013 3,111 1,792 2,148 888 7,939 —
2014 2,752 1,347 1,949 807 6,856 —
2015 2,239 1,265 1,736 703 5,943 75%
2016 1,948 1,210 1,646 672 5,476 69%
2017 2,194 1,248 1,700 718 5,860 74%
2018 2,212 1,221 1,720 725 5,878 74%
2019 2,139 1,193 1,648 680 5,660 71%
2020 2,317 1,289 1,777 743 6,126 77%
Notes
1 On April 1, 2015, California Governor Jerry Brown issued an executive order (B29-2015) mandating statewide reductions in water
use. The order directs the State Water Resources Control Board to implement mandatory water reductions in cities and towns across
California to reduce water usage by 25 percent, compared to the amount used in 2013, through February 2016.
All units in acre-feet (AF)
— = not applicable AF = acre-feet OCSD = Oceano Community Services District
4.2.4 2020 Groundwater Pumpage
Total SMGB groundwater production in the NCMA, including urban production, applied agricultural water
requirements, and rural pumping, is shown in Table 15. Total estimated SMGB groundwater pumpage in the
NCMA in 2020 was 3,064 AF, which represents a decrease from 2019 (3,320 AF) and the lowest volume of
groundwater production from the NCMA portion of the SMGB in at least the last 20 years.
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Table 15. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2020 (AF)
Agency
Groundwater
Entitlement + Ag
Conversion Credit (AF)
2020 Groundwater
Use from SMGB
(AF)
Percent Pumped of
Groundwater
Entitlement
Arroyo Grande 1,202 + 121 = 1,323 39 3%
Grover Beach 1,198 + 209 = 1,407 500 42%
Pismo Beach 700 55 8%
Oceano CSD 900 19 2%
Total Urban Groundwater
Entitlement /Use 4,000 + 330 = 4,330 613 15%
Agricultural Irrigation Applied
Water 5,300 - 330 = 4,970 2,308 50%
Nonpotable Irrigation by Arroyo
Grande -- 61 --
Rural Water Users -- 82 --
Estimated Subsurface Outflow
to Ocean (2001 Groundwater
Management Agreement)
200 -- --
Total NCMA Groundwater
Entitlement /Use 9,500 3,064 32%
Notes
AF = acre-feet Ag = agriculture CSD = Community Services District NCMA = Northern Cities Management Area
The total estimated groundwater pumpage of 3,064 in 2020 represents about 32 percent of the calculated
safe yield of 9,500 AFY for the NCMA portion of the SMGB.
A graphical depiction of water uses by supply source for each NCMA agency since 2000 is presented as Figure
27. The graphs depict changes in water supply availability and use over time, including the increased use of
SWP water during the early years of the period when SWP Table A deliveries were greater. The increased
dependence in 2017, 2018, 2019, and 2020 on Lopez Lake is illustrated in this graphic. Although all four
agencies pumped groundwater as part of their supply portfolios in 2020, groundwater pumped from the SMGB
constituted a minor part of the overall water supply, an amount of 674 AF 22 or 11 percent of overall urban
use.
22 This total includes the 613 AF pumped by NCMA agencies and the 61 AF of non-potable irrigation production in Arroyo
Grande.
Item 11.a. - Page 81
P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 27 NCMA Municipal Water Use by Source.grf
FIGURE 27. MUNICIPAL WATER USE BY SOURCE
Northern Cities Management Area
San Luis Obispo County, California
Notes:
AFY - Acre-feet per year
SWP - California State Water Project
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As shown in Figure 28, groundwater pumpage reached a peak in 2007 and then declined in 2008, 2009, and
2010. From 2010 through 2013, pumpage increased slightly every year, but even so, overall groundwater use
remained significantly lower than previous annual pumpage rates. From 2013 through the present, annual
pumpage totals have been on a downward trend. In 2020, urban potable groundwater use declined to 613
AF, which is 15 percent of the 4,330 AF of combined urban groundwater entitlement and agricultural
conversion credit.
4.2.5 Changes in Water Production
Historical water use for urban uses, agricultural irrigation, and rural uses is shown in Table 16.
Table 16. Historical Total Water Use (Groundwater and Surface Water, AF)
Year Arroyo
Grande
Grover
Beach
Pismo
Beach OCSD Total
Urban
Agricultural
Irrigation1
Rural
Water Total Use
2005 3,460 2,082 2,142 931 8,615 2,056 36 10,707
2006 3,425 2,025 2,121 882 8,453 2,056 36 10,545
2007 3,690 2,087 2,261 944 8,982 2,742 36 11,760
2008 3,579 2,051 2,208 933 8,771 2,742 36 11,549
2009 3,315 1,941 2,039 885 8,180 2,742 36 10,958
2010 2,956 1,787 1,944 855 7,542 2,056 38 9,636
2011 2,922 1,787 1,912 852 7,473 2,742 38 10,253
2012 3,022 1,757 2,029 838 7,646 2,742 41 10,429
2013 3,111 1,792 2,148 888 7,939 2,742 42 10,722
2014 2,752 1,347 1,949 807 6,855 2,955 38 9,848
2015 2,239 1,266 1,736 703 5,943 3,008 38 8,990
2016 1,948 1,210 1,646 672 5,476 2,551 81 8,108
2017 2,194 1,248 1,700 718 5,860 2,579 80 8,519
2018 2,212 1,221 1,720 725 5,878 2,713 81 8,672
2019 2,139 1,193 1,648 680 5,660 2,554 82 8,296
2020 2,317 1,289 1,777 743 6,126 2,369 82 8,577
Notes
1 Irrigation applied water includes agricultural irrigation plus SMGB non-potable irrigation by Arroyo Grande.
AF = acre-feet CSD = Community Services District
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FIGURE 28. TOTAL WATER USE (URBAN, RURAL, AGRICULTURAL) BY SOURCE
Northern Cities Management Area
San Luis Obispo County, California
P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 26 NCMA Total Water Use by Source
Notes:
AFY - Acre-feet per year
SWP - California State Water Project
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In general, urban water production has ranged from 8,982 AF in 2007 (Table 16) to 5,476 AF in 2016. Total
water use since 2007 has been on a general downward trend; this overall decline in water use may be
attributed to conservation activities implemented by the NCMA agencies in response to the drought.
In the agricultural irrigation category, agricultural acreage has remained fairly constant. Thus, annual applied
water for agricultural irrigation varies mostly with weather conditions. Acknowledging the variability caused by
weather conditions, agricultural irrigation applied water is not expected to change significantly given the
relative stability of applied irrigation acreage and cropping patterns in the NCMA south of Arroyo Grande Creek.
Changes in rural domestic pumping have not been significant.
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SECTION 5: Comparison of Water Supply and Water Production
The Baseline Available Urban Water Supplies for each of the NCMA agencies is 10,625 AFY, assuming 100
percent delivery of SWP allocation and assuming no Lopez Lake surplus water or SWP carryover (Table 8). In
2020, because of the availability of Lopez Lake surplus water and SWP carryover water, the total available
urban water supply was 12,470 AF (Table 9).
As described in the 2001 Groundwater Management Agreement and affirmed in the 2002 Settlement
Agreement, the calculated safe yield from the NCMA portion of the SMGB is 9,500 AFY (Tables 8 and 15).
Because all agricultural irrigation water use is supplied by groundwater, the total available agricultural
irrigation supply is a portion of the estimated safe yield; this portion was allocated as 5,300 AFY for agricultural
and rural use. The agricultural conversion of 330 AFY reduces this allocation to 4,970 AFY. Of the estimated
safe yield of 9,500 AFY, other than what is allocated for agricultural irrigation and rural use, the remaining
4,330 AFY is allocated for urban water use (4,330 AFY, including 4,000 AFY groundwater allocation plus 330
AFY in agricultural conversion credit) and an estimated 200 AFY for subsurface outflow to the ocean.
In 2020, the total estimated NCMA water production was 8,577 AF (Table 17). The 2020 water production of
each city and agency is shown by source in Table 17. Note that the production volumes described here are
gross production (if pumped groundwater) and gross deliveries (if surface water deliveries) and equal net
consumptive demand plus losses and return water.
Table 17. Water Production by Source, 2020 (AF)
Agency Lopez
Lake
State
Water
Project
SMGB
Groundwater
Other
Supplies1 Total
Urban Area
Arroyo Grande 2,242 0 39 36 2,317
Grover Beach 789 0 500 0 1,289
Pismo Beach 1045 677 55 0 1,777
Oceano CSD 664 60 19 0 743
Urban Water Use
Total 4,740 737 613 36 6,126
Non-Urban Area
Agricultural Irrigation
Applied Water 0 0 2,308 0 2,308
Rural Water Users 0 0 82 0 82
Non-potable
Irrigation by Arroyo
Grande
0 0 61 0 61
Total 4,740 737 3,064 36 8,577
Notes
1 Other Supplies includes groundwater pumped from outside the NCMA boundaries.
AF = acre-feet CSD = Community Services District SMGB = Santa Maria Groundwater Basin
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As shown in Table 17, water for urban use in 2020 was supplied to the NCMA from 4,740 AF of Lopez Lake
water; 737 AF of SWP water; and 613 AF of groundwater. Arroyo Grande produced 36 AF from its Pismo
Formation wells in 2020.
Based on the calculated yield of the NCMA portion of the SMGB, the baseline, or full allocation, of total
available supply for all uses is 15,595 AFY, which is the sum of 10,625 AFY for urban use plus the allocation
for agricultural irrigation and rural area of 4,970 AFY. In 2020, factoring in the SWP delivery schedule and
availability of SWP carryover water and Lopez Lake surplus, the total available supply for all uses was 12,470
AF (Table 9) compared with actual 2020 NCMA water use of 8,577 AF (Table 17). It must be noted, however,
that this comparative review of available 2020 supply versus production must be viewed with caution because
of the potential threats to the groundwater supply (see Section 6.1, below). As described earlier, the NCMA
agencies pumped only 15 percent of their “available” groundwater entitlement. Even with such minimal
utilization of groundwater resources, a minor decrease of groundwater in storage occurred in the NCMA portion
of the SMGB. It is clear that the NCMA agencies could not have used their entire groundwater entitlement in
2020 without significantly lowering water elevations below current conditions and potentially seriously
exacerbating the threat of seawater intrusion.
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SECTION 6: Threats to Water Supply
Because the NCMA agencies depend on both local and imported water supplies, changes in either state-wide
or local conditions can threaten the NCMA water supply. Water supply imported from other areas of the state
may be threatened by state-wide drought, effects of climate change in the SWP source area, management and
environmental protection issues in the Delta that affect the amount and reliability of SWP deliveries, and risk
of seismic damage to the SWP delivery system. Local threats to the NCMA water supply similarly include
extended drought and climate change that may affect the yield from Lopez Lake and reduced recharge to the
NCMA. In addition, the NCMA is not hydrologically isolated from the NMMA and the rest of the SMGB, and
water supply threats in the NMMA are a potential threat to the water supply sustainability of the NCMA.
There is a potential impact from seawater intrusion if the groundwater system, including the entire SMGB, is
not adequately monitored and managed. In particular, management of the SMGB may need to account for sea
level rise and the relative change in groundwater gradient along the shoreline.
6.1 Threats to Local Groundwater Supply
6.1.1 Declining Water Levels
Water levels in the NCMA portion of the SMGB exhibited an overall declining trend for many years but have
started to recover since about 2016. Important factors for maintaining water levels are managing inflow and
outflow to the aquifer.
Inflow: An important inflow component to the NCMA area is subsurface inflow into the aquifers that supply
water wells serving the NCMA. Historically, subsurface inflow to the NCMA from the Nipomo Mesa along
the southeast boundary of the NCMA has been an important component of groundwater recharge. This
inflow is reduced from historical levels, as first recognized in 2008–2009, to “something approaching no
subsurface flow” because of lower groundwater levels in the NMMA (NMMA 2nd Annual Report CY 2009,
page 43) (NMMA, 2010). This condition continues, as described in all subsequent NMMA annual reports.
Outflow: A major outflow component is groundwater pumpage. Total SMGB groundwater pumping in the
NCMA (urban, agricultural, and rural domestic) was 3,064 AF in 2020, which is 32 percent of the court-
accepted 9,500 AF safe yield of the NCMA portion of the SMGB. Such minimal utilization of the
groundwater resource resulted in only a minor gain of groundwater in storage in the aquifer and a relatively
slight rise in water level elevations. However, it is clear that the NCMA agencies could not have used their
entire groundwater entitlement in 2020 without significantly lowering water elevations below current
conditions and potentially seriously exacerbating the threat of seawater intrusion.
The serious drought from 2011 to 2015 resulted in a steady decline in groundwater in storage in the NCMA
portion of the SMGB. The recent slight increase of groundwater in storage (despite groundwater pumping at
only 35 percent of the safe yield, which seemingly should have resulted in significant increases in groundwater
in storage) illustrates the impacts of the recent drought. However, it also illustrates the impacts of reduced
subsurface inflow recharge from the east (Nipomo Mesa). This condition of a long-term decline in groundwater
in storage in the NCMA, even though total pumping is currently 32 percent of the safe yield, will be exacerbated
if the NCMA agencies are required to increase groundwater withdrawals because of a reduction or total loss
in local surface water supplies or SWP deliveries.
6.1.2 Seawater Intrusion
The NCMA is underlain by an accumulation of alluvial materials that slope gently offshore and extend for many
miles under the ocean (DWR 1970, 1975). Coarser materials within the alluvial materials comprise aquifer
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zones that receive freshwater recharge in areas above sea level. If sufficient outflow from the aquifer occurs,
the dynamic interface between seawater and fresh water will be prevented from moving onshore. Sufficient
differential pressure to maintain a net outflow is indicated by onshore groundwater elevations that are above
mean sea level and establish a seaward gradient to maintain that outflow.
The 2008 NCMA Annual Report documented that a portion of the aquifer underlying the NCMA exhibited water
surface elevations below sea level (NCMA, 2008). Hydrographs for NCMA sentry wells and the Deep Well Index
(Figures 11 through 15) show that coastal groundwater elevations were at relatively low levels for as long as
2 years during that time. Such sustained low levels had not occurred previously in the historical record and
reflected the impact of drought on groundwater levels. The low coastal groundwater levels indicated a potential
for seawater intrusion.
Elevated concentrations of TDS, chloride, and sodium were observed in wells 30N03 and 30N02 beginning in
May 2009, indicating potential seawater intrusion (Figures 29 and 30). OCSD MW-Blue also showed elevated
concentrations of TDS and chlorides, but a concurrent decline in sodium (Figure 30). Concentrations declined
to historical levels in well 30N03 by July 2010 and declined in well 30N02, one of the sentry wells comprising
the Deep Well Index, to historical levels by October 2009. Comparing well 30N02 to the other Deep Well Index
wells, the other Deep Well Index wells showed no elevated concentrations during the same period. However,
comparing well 30N02 to wells with similar screen elevations (Figure 4), wells 36L01 (approximately 12,000
feet south of well 30N02) and the OCSD MW-Blue well, approximately 3,300 feet east-southeast of well
30N02, suggested that seawater intrusion perhaps progressed eastward as far as the OCSD MW-Blue well,
but not as far south as well 36L01 (Figure 30). While the TDS and chloride concentrations were elevated from
August 2009 to July 2011 in the OCSD MW-Blue well, the sodium concentrations remained within historical
levels. During the same period, TDS, chloride, and sodium concentrations remained within historical levels in
well 36L01.
During 2020, there were no indications of seawater intrusion.
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FIGURE 29. HISTORICAL TDS, CHLORIDE AND SODIUM, INDEX WELLS AND 30N03
Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
0
500
1,000
1,500
2,000
2,500
TDS, mg/L20
40
60
80
100
120
140
160
180
200
Chloride, mg/L0
40
80
120
160
200
240
280
Sodium, mg/LP:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 29 NCMA TDS, Cl and Sodium Index Wells and 30N03.grf *
30N02 Chloride
>600 mg/l
in 2009
Notes:
TDS - total dissolved solids
mg/L - milligrams per liter
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FIGURE 30. HISTORICAL TDS, CHLORIDE AND SODIUM, WELLS 30N02, MW-BLUE AND 36L01
Northern Cities Management Area
San Luis Obispo County, California
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
0
500
1,000
1,500
2,000
2,500
TDS, mg/L20
40
60
80
100
120
140
160
180
200
Chloride, mg/L0
40
80
120
160
200
240
280
Sodium, mg/LWell 30N02 (Paso Robles Formation)
Well 31H11 (Blue; Paso Robles Formation)
Well 36L01 (Paso Robles Formation)
P:\Portland\672-Northern Cities Management Area\007-2020 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 30 NCMA TDS, Cl and Sodium Wells 30N02 MW-Blue and 36L01.grf *
Notes:
TDS - total dissolved solids
mg/L - milligrams per liter
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Measures to Avoid Seawater Intrusion
In recognition of the risk of seawater intrusion, the NCMA agencies have developed and implemented a water
quality monitoring program for the sentry wells and OCSD observation wells. The NCMA agencies and
SLOFCWCD have worked cooperatively toward the protection of the sentry wells as long-term monitoring sites.
Several measures are employed by the NCMA agencies to reduce the potential for seawater intrusion.
Specifically, the NCMA agencies have voluntarily reduced coastal groundwater pumping; decreased overall
water use via conservation; and initiated plans, studies, and institutional arrangements to secure additional
surface water supplies. As a result, each of the four major municipal water users in the NCMA reduced
groundwater use between 25 and 95 percent during the past several years. In 2020, municipal groundwater
use was 684 AF, which constitutes 17 percent of the urban users’ groundwater entitlement (including
agricultural conversion credits) of the safe yield (Table 7).
According to the DWR Bulletin 63-3 report (DWR, 1970) both the Paso Robles Formation aquifer and the lower
confined portion of the Cienega Valley alluvial aquifer are recharged primarily from subsurface groundwater
inflow from the east, where the overlying confining layers are thin to nonexistent (DWR, 1970). These recharge
areas to the east include inland reaches of Arroyo Grande Valley and portions of Nipomo Mesa (DWR, 1970).
Any action that results in reduced groundwater recharge, whether it is from drought or reduction of subsurface
inflow from the north and east, reduces overall recharge to the groundwater basin, lowers the gradient (or
head) of the groundwater near the shoreline, and reduces subsurface outflow to the ocean, thereby increasing
the potential threat of seawater intrusion. Alternatively, any action that results in increased groundwater
recharge lessens the threat of seawater intrusion.
A major initiative that will provide significant protection to the threat of seawater intrusion is the development
of Central Coast Blue. Central Coast Blue is a regional recycled water project that includes advanced treatment
of water from the wastewater treatment plants of Pismo Beach and SSLOCSD and injection into the NCMA
portion of the SMGB. Injection of the highly treated effluent will reduce the threat of seawater intrusion and
improve water supply sustainability for the region. Tasks related to the development of the project that were
performed prior to and throughout 2020 include feasibility study analysis, preliminary design, pilot plant
development and operation, funding appropriation, cost/benefit sharing analysis, groundwater modeling, and
environmental review (see additional detail in Section 1.7.3).
6.2 Threats to State Water Project Supply
Both extended drought and long-term reduction in snowpack from climate change can affect SWP deliveries.
Above-average precipitation in 2016, 2017, and 2019 have resulted in a modest reprieve from drought
conditions locally. The storage capacity levels of the state’s two largest reservoirs, Lake Shasta and Lake
Oroville, were 73 and 59 percent capacity, respectively, as of the start of 2020, both up from the previous
year.
Leading into 2021, rainfall during the last 8 months of 2020 resulted in 1.97 inches of rain. The initial
allocation announcement by DWR, announced on December 1, 2020, informed SWP contractors that their
2020 allocation would be 10 percent of requests for deliveries. As the winter rainfall season progresses, the
allocations often increase by March or April. The last 100 percent allocation—difficult to achieve even in wet
years largely because of Delta pumping restrictions to protect threatened and endangered fish species—
occurred in 2006.
The immediate threat of allocation reductions to Pismo Beach and OCSD, the only SWP subcontractors in the
NCMA, has not significantly materialized during the past several years. The SLOFCWCD’s large amount of
unsubscribed Table A allocation provides a buffer, in addition to the agency’s drought buffer, so that
contracted volumes to SWP subcontractors, such as the OCSD and Pismo Beach, still may be provided in full.
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However, the SWP supply has the potential to be affected by drought as well as environmental issues,
particularly involving the Delta smelt.
6.3 Threats to Lopez Lake Water Supply
Extended drought conditions in recent years have contributed to record low water levels in Lopez Lake; the
impacts of climate change may affect future precipitation amounts in the Lopez Creek watershed. As
discussed in Section 4.1.1, the Zone 3 agencies developed and implemented the LRRP in response to reduced
water in storage in the lake. The LRRP is intended to reduce municipal diversions and downstream releases
as water levels drop to preserve water within the reservoir for an extended drought. Despite below-average
precipitation in 2018 and 2020, above-average precipitation in 2016, 2017, and 2019 resulted in a return to
non-drought conditions in the lake. However, even with reduced diversions and releases, water from Lopez
Lake may be significantly reduced or unavailable to the Zone 3 agencies in the event of future drought. Without
access to water from Lopez Lake, the NCMA agencies and local agriculture stakeholders may be forced to rely
more heavily on their groundwater supplies and increase pumping during extended drought conditions, which
could result in lowering water levels in the aquifer and an increased threat from seawater intrusion. Moreover,
a reduction in downstream releases from the reservoir, as mandated by the LRRP, likely will lead to reduced
recharge to the NCMA portion of the SMGB and further contribute to declining groundwater levels.
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SECTION 7: Management Activities
The NCMA and overlying private well users have actively managed surface water and groundwater resources
in the area for more than 40 years. Management objectives and responsibilities were first established in the
1983 Gentlemen’s Agreement, recognized in the 2001 Groundwater Management Agreement, and affirmed
in the 2002 Settlement Agreement. The responsibility and authority of the Northern Parties for NCMA
groundwater management was formally established through the 2002 Settlement Agreement, 2005
Stipulation, and 2008 Judgment. Throughout the long history of collaborative management, which was
formalized through the Agreement, Stipulation, and Judgment, the overall management goal for the NCMA
agencies is to preserve the long-term integrity of water supplies in the NCMA portion of the SMGB.
7.1 Strategic Plan
7.1.1 Purpose and Background
An NCMA Strategic Plan was first developed in 2014 to provide the NCMA TG with a mission statement to
guide future initiatives, provide a framework for identifying and communicating water resource planning goals
and objectives, and formalize a 10-year work plan for implementation of those efforts. Several key objectives
were identified related to enhancing water supply reliability, improving water resource management, and
increasing effective public outreach. Implementation of some of these efforts continued throughout 2020.
Work began in 2019 to update the 2014 NCMA Strategic Plan. The Strategic Plan was developed over a series
of strategic planning sessions and NCMA TG meetings and culminated with the publication of the Strategic
Plan for the NCMA TG in March 2020. The purpose of the Strategic Plan is to provide the NCMA TG with the
following:
• A mission statement to guide future initiatives
• A framework for communicating water resource goals
• A formalized work plan for the next 10 years
7.1.2 Mission Statement
Through the strategic planning process, the NCMA TG developed the following mission statement to guide
ongoing initiatives and plan implementation and capture the requirements outlined in the 1983 Gentlemen’s
Agreement, 2005 Stipulation, and the 2008 Judgment:
Preserve and enhance the sustainability of water supplies for the Northern Cities Area by:
• Enhancing supply reliability
• Protecting water quality
• Maintaining cost-effective water supplies
• Advancing the legacy of cooperative water resources management
• Promoting conjunctive use
7.1.3 Objectives of the NCMA TG
Through the 2020 strategic planning process, the NCMA TG identified several key objectives to guide future
efforts. These objectives include the following:
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A. Enhance Water Supply Reliability
Develop coordinated response plan for salt water intrusion and other supply emergencies
Support implementation of Central Coast Blue
Prepare the Northern Cities for prolonged drought conditions
Analyze impacts of pumping on the groundwater basin
Improve protection against threats to groundwater sustainability
B. Improve Water Resource Management
Improve management/conjunctive use of water resources
Improve coordination between technical/legal/managerial initiatives
Abide by the legal/regulatory groundwater management requirements
Increase understanding of current and historical groundwater conditions to inform water resources
initiatives
C. Increase Effective Outreach
Engage agriculture stakeholders
Improve cooperation, coordination, and information sharing with local and regional agencies to
further the objectives of the NCMA agencies
Reinforce the role of the NCMA TG as the recognized technical expert for water resources within
the Northern Cities Management Area
Increase communication with City Councils and the Board of Directors
Maintain equity among all NCMA agencies
7.1.4 Strategic Initiatives and Implementation Plan
Fifteen key strategies were identified by the TG for improving the sustainability of the water resource. Strategic
initiatives were then developed for each key strategy, and an extensive screening and objective ranking
process was applied. Utilizing the ranked and grouped strategic initiatives, the NCMA TG developed an
implementation plan for the key strategies.
The implementation plan includes a ranking for each initiative, the key participants, the required actions, an
estimated budget, and an implementation time frame. The implementation time frame incorporates three
periods: a current designation that refers to initiatives that the NCMA plans to complete within 1 year, a short-
term designation that refers to initiatives that could be completed within 5 years, and a long-term designation
that refers to initiatives that are anticipated to take longer than 5 years to implement.
7.2 Management Objectives
In addition to the Strategic Plan, the NCMA TG has, over the years, established eight basic Water Management
Objectives for ongoing NCMA groundwater management. Many of these objectives were incorporated into the
Strategic Plan but are repeated here because they form the framework to long-term strategies and objectives
to effectively manage the groundwater resource. The management objectives include the following:
1. Share Groundwater Resources and Manage Pumping
2. Enhance Management of NCMA Groundwater
3. Monitor Supply and Demand and Share Information
4. Manage Groundwater Levels and Prevent Seawater Intrusion
5. Protect Groundwater Quality
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6. Manage Cooperatively
7. Encourage Water Conservation
8. Evaluate Alternative Sources of Supply
Each of these objectives is discussed in the following sections. Under each objective, the NCMA TG has
identified strategies to meet the objectives. These strategies are listed and then discussed under each of the
eight objectives listed below. Other potential objectives are outlined in the final section.
7.2.1 Share Groundwater Resources and Manage Pumping
Strategies:
Continued reduction of groundwater pumping; maintain pumping below safe yield.
Coordinated delivery of Lopez Lake water to the maximum amount available.
Continue to import SWP supplies to OCSD and Pismo Beach.
Maintain surface water delivery infrastructure to maximize capacity.
Utilize Lopez Lake to store additional SWP water within San Luis Obispo County.
Modify Zone 3 agency contracts to incorporate storage provisions in the contract.
Discussion:
Maintain Groundwater Pumping Below Accepted Basin Yield
A longstanding objective of water users in the NCMA has been to cooperatively share and manage groundwater
resources. In 1983, the Northern Parties mutually agreed on an initial safe yield estimate and an entitlement
of pumping between the urban users and agricultural irrigation users of 57 percent and 43 percent,
respectively (see Section 4.1). In this agreement, the NCMA agencies also established pumping entitlements
among themselves (Section 4.1.3). Subsequently, the 2001 Groundwater Management Agreement included
provisions to account for changes such as agricultural land conversions. The agreements provide that any
change in the accepted safe yield based on ongoing assessments would be shared on a pro rata basis.
Pursuant to the 2005 Stipulation, the NCMA agencies conducted a water balance study to update the safe
yield estimate (Todd, 2007). As a result, the NCMA agencies agreed to maintain the existing pumping
entitlement among the urban users and established a consistent methodology to address agricultural land
use conversion.
Maximize Delivery of Lopez Lake Water and Continue Importing State Water Project Water
In addition to cooperatively sharing and managing groundwater resources, the NCMA agencies have
coordinated delivery of water from Lopez Lake. At the same time, Pismo Beach and OCSD have continued to
import SWP water. Both actions maximize use of available surface water supplies. In 2016, in response to the
ongoing drought at that time and the threat of diminishing water supplies, Arroyo Grande approved a measure
authorizing the purchase of SWP water from the SLOFCWCD’s excess entitlement on a temporary basis and
only during a declared local water emergency. That condition was not reached in 2017 nor subsequent years,
and Arroyo Grande has not purchased SWP water to date.
Modify Zone 3 Agency Contracts
An initiative to modify the Zone 3 agency contracts to incorporate storage provisions was started in late 2019
and continued throughout 2020. By the end of 2020, the conceptual contract amendments were developed,
reservoir modeling was completed, and updated contract language had been developed and reviewed by the
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Zone 3 Technical Advisory Committee. Anticipated for 2021 is performance of a California Environmental
Quality Act review to evaluate potential impacts of the proposed amendments, and contract amendment
approval. The contract language changes allow for the following:
Allow for year-over-year individual agency storage
Account for evaporation losses of stored water
Allow for the reduction of entitlements or to utilize stored water to meet downstream release requirements
Develop mechanisms to address the condition when the Zone 3 agencies do not have water to contribute
to downstream release obligations
Clarify Lopez Lake water turnout delivery capacity limitations
Remove antiquated language from the contract that is no longer relevant
Allow for exchanges of Lopez Lake water with SWP water during times when there is a curtailment of
delivery of Lopez Lake water due to maintenance projects
The initiative to modify the contract language will provide each agency the ability to store water for future
drought, improve flexibility of multi-year water supply planning, and provide an incentive for agencies to
preserve water in the reservoir.
7.2.2 Enhance Management of NCMA Groundwater
Strategies:
Develop a groundwater model for the NCMA/NMMA or the entire SMGB.
Coordinate with the County and NMMA to develop new monitoring well(s) in key locations within the SMGB.
Develop a Salt and Nutrient Management Plan (SNMP) for the NCMA/NMMA.
Develop and implement a framework for groundwater storage/conjunctive use, including return flows.
Update the 2001 Management Agreement.
Discussion:
The NCMA agencies participated in the oversight of the performance of the SMGB characterization study
(Fugro, 2015) that was finalized with the distribution of the complete data sets in March 2016. The project
was conducted as part of the County IRWMP 2014 update, in part to prepare for and to provide the
foundational data for development of a numerical groundwater flow model and preparation of a basin-wide
SNMP. To date, the SNMP has not been initiated, but the groundwater flow modeling work has been completed
through Phase 1B, as described below. This groundwater flow model is associated with Central Coast Blue, a
recycled water project formerly known as the Regional Groundwater Sustainability Project.
The intent of Central Coast Blue is to enable Pismo Beach, partnering NCMA agencies, and the SSLOCSD to
construct an ATF to produce APW to augment its water supply through injection to recharge the aquifer and
develop a seawater intrusion barrier to improve water supply reliability for the area. As part of Central Coast
Blue planning and technical studies, a localized groundwater flow model (the Phase 1A model) was developed
for the northern portion of the NCMA that evaluated the concept of injecting APW into the aquifer to increase
recharge, improve water supply reliability, and help prevent future occurrences of seawater intrusion.
Based on the results of the Phase 1A model and through funding by SSLOCSD Supplemental Environmental
Program, work was initiated in 2017 and continued through 2019 and into early 2020 for development of the
Phase 1B groundwater flow model. The model domain of the Phase 1B model covers the entire NCMA, NMMA,
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and the portion of the SMVMA north of the Santa Maria River. The purpose of the Phase 1B model is to
evaluate additional groundwater injection and extraction scenarios to further support Central Coast Blue. It is
being utilized to identify the locations of the proposed injection wells, quantify the amount of water that can
be injected, evaluate strategies for preventing seawater intrusion, and develop estimates of the overall yield
that the Central Coast Blue stakeholders will be able to receive from the project. The Phase 1B model will also
be a tool for the NCMA agencies to further evaluate basin yield and basin management initiatives.
As part of the SLOFCWCD’s SMGB characterization study (Fugro, 2015), continuous monitoring transducers
were installed in 2015 in coastal sentry wells 36L01 and 36L02 (which are part of the NCMA monitoring
program) and in wells 11N/36W-12C01 and 11N/36W-12C02 (located in the NMMA and monitored by the
County and by NMMA). As a result, continuous water level and field-parameter water quality data were
collected from these wells throughout 2020.
Throughout 2020, the TG discussed various components and approaches to updating the 2001 Management
Agreement. These discussions will continue in 2021.
The monthly NCMA TG meetings provide for collaborative development of joint budget proposals for studies
and plans and shared water resources. In addition, the monthly meetings provide a forum for discussing the
data collected as part of the quarterly monitoring reports.
7.2.3 Monitor Supply and Demand and Share Information
Strategies:
Develop a Water Supply, Production, and Delivery Plan (WSPDP).
In conjunction with and through the umbrella of the Zone 3 agencies and SLOFCWCD, continue efforts to
evaluate potential drought emergency options and implement drought emergency actions.
Develop a coordinated Water Shortage Contingency Plan to respond to a severe water shortage condition
in the NCMA.
Share groundwater pumping data at monthly NCMA TG meetings.
Evaluate future water demands through comparison with the following UWMP projections:
Arroyo Grande 2015 UWMP (revised and updated, January 2017; 2020 UWMP update is in process)
Pismo Beach 2015 UWMP (June 2016; 2020 UWMP update is in process)
Grover Beach 2015 UWMP (April 2020)
OCSD is not required to prepare a UWMP because the community population does not meet the
minimum requirement threshold.
Discussion:
Water Supply, Production and Delivery Plan
In January 2015, the NCMA agencies developed a Water Supply, Production, and Delivery Plan (WSPDP) that
applies the strategic objectives to the various supplies available to the area. The NCMA area receives supplies
from Lopez Lake, the SWP, and the SMGB.
The purpose of the WSPDP is to provide the NCMA agencies with a delivery plan that optimizes use of
existing infrastructure and minimizes groundwater pumping from the SMGB. The plan includes the
development of a water supply and delivery modeling tool for the NCMA agencies, evaluation of three
delivery scenarios, and development of recommendations for water delivery.
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The WSPDP made recommendations that were implemented or subject to further study. Components of the
WSPDP and the various recommendations incorporated into the Plan are summarized throughout Section 7.
The recommendations of the WSPDP reinforce the ongoing management efforts by the NCMA and provide
potential projects to improve water supply reliability and protect water quality during periods of drought.
Ongoing work to implement the recommendations includes evaluation of additional delivery facilities to add
operational flexibility to ensure optimum use of all supplies.
Implementing the WSPDP has allowed the NCMA to minimize the use of groundwater thereby protecting
against seawater intrusion while meeting the needs of its customers and other water users.
The WSPDP now provides a framework for the NCMA to manage the groundwater resource actively and
effectively, particularly in years of below-normal rainfall and below “normal” SWP delivery schedules. The
WSPDP outlines a strategy to provide sufficient supplies to NCMA water users in instances of reduced SWP
delivery. Specifically, in 2020, municipal groundwater pumpage totaled 613 AF, which is less than any other
year during the 22-year period from 1999 through 2020 (inclusive). The pumped volume of 613 AF constitutes
approximately 15 percent of the volume allotted to the agencies through the 1983 Gentlemen’s Agreement
and 2005 Stipulation.
Seawater intrusion is the most important potential adverse impact for the NCMA agencies to consider in the
efforts to effectively manage the aquifer. Seawater intrusion, a concern since the 1960s, would degrade the
quality of water in the aquifer and potentially render portions of the SMGB unsuitable for groundwater
production (DWR, 1970).
A Deep Well Index of the three primary deep sentry wells of 7.5 feet above sea level has been recognized as
the threshold, above which it is thought that there is sufficient fresh water (groundwater) outflow to prevent
seawater intrusion. From late 2009 to April 2013, the NCMA agencies’ management of groundwater levels
and groundwater pumpage maintained the Deep Well Index above the 7.5-foot level. Then in mid-to-late 2013,
2014, and 2015, groundwater levels dropped below the target index value on several occasions and often
remained below the target elevation for several months on end. In 2015, the groundwater levels were generally
between 4 and 7 feet below the 7.5-foot target index level. Groundwater elevations dropped below the Deep
Well Index threshold several months in 2016, but this occurred for a shorter duration than in 2015, with
groundwater elevations reaching less than 2 feet below the target value. In 2017, the Deep Well Index
remained above the 7.5-foot threshold value the entire year for the first time since 2012 (except for a very
brief period between August 18 and August 29, 2017, when the agencies were forced to increase groundwater
pumping due to a maintenance shutdown of the Lopez Lake water supply). In 2018, the Deep Well Index
started the year above the trigger value, then dropped below the 7.5-foot threshold in early July. For more than
4 months, the Deep Well Index remained below the index trigger value, reaching an index value of
approximately 6.5 feet in late October. In late November 2018, it rose above the threshold value where it
remained through the end of the year (Figure 12).
In 2019, the Deep Well Index started the year above the trigger value with an index value of more than 9 feet
in January. It continued to rise, reached a high at more than 11 feet in late March, and then began to decline.
The index value dropped down to the 7.5-foot trigger value briefly in late October and then immediately began
to rise. The index value continued to rise throughout the end of the year and finished 2019 at about 10.5 feet
above sea level (Figure 12).
In 2020, the Deep Well Index started the year above the trigger value with an index value of more than 10 feet
in January. It continued to rise, reached a high more than 12 feet in April, and then began to decline. The index
value dropped down to the 7.5-foot trigger value briefly in mid-October and then immediately began to rise.
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The index value continued to rise throughout the end of the year and finished 2020 at about 9 feet above sea
level.
Zone 3 Extended Drought Emergency Options
Management activities have become more closely coordinated among the NCMA agencies as a result of the
2011 through 2015 drought. In particular, the NCMA agencies implemented the LRRP to limit municipal
diversions and downstream releases from Lopez Lake to ensure that water is available for future potentially
dry years. In addition, the Zone 3 agencies (which include the NCMA agencies) initiated a long-term drought
planning effort. The planning effort is intended to prepare water supplies for periods of extended drought
conditions.
The NCMA agencies, in conjunction with the other Zone 3 agencies and SLOFCWCD, continue efforts to
evaluate potential drought emergency options and implement drought emergency actions. This initiative
includes identification, evaluation, and ranking of potential options available to Zone 3 to improve the
reliability of its water supplies. The Zone 3 agencies and the County have pledged to work collaboratively to
continue to evaluate and implement emergency water supply reliability options as required in conditions of
extended drought.
A drought emergency action initiated by Zone 3 is cloud seeding. In 2019, the County Board of Supervisors, in
coordination with the NCMA agencies and other Zone 3 partners, approved a professional services contract
for the 2019–2020 Winter Season Cloud Seeding Program for the Lopez Lake Watershed. The program is
conceived to be a 3-year program. For the 2020 winter season, cloud seeding operations were conducted to
enhance precipitation in the Lake Lopez drainage. The operational period ran from January 9, 2020, to
April 15, 2020. During that operational period, seeding opportunities occurred on 6 days. On November
17, 2020, the County Board of Supervisors approved the Zone 3 Cloud Seeding Program for 2020–2021. The
active program period is from December 1, 2020, to April 15, 2021.
Additional potential drought emergency options that the Zone 3 agencies have evaluated in the past few years
include the following:
State Water Project. Maximize importation of SLOFCWCD SWP supplies, including subcontractor supplies
and the large amount of unsubscribed Table A allocation.
Surplus Nacimiento Water Project (NWP) Water. Investigate transfer/exchange opportunities to obtain
surplus NWP water for the Zone 3 agencies (i.e., exchange agreements with the City of San Luis Obispo
and the Chorro Valley pipeline SWP subcontractors).
Water Market Purchases. Investigate opportunities to obtain additional imported water and deliver it to
the Zone 3 agencies through the SWP infrastructure (e.g., exchange agreements with San
Joaquin/Sacramento Valley farmers, water broker consultation, groundwater banking exchange
agreements, and others).
Morro Bay Desalination Plant Exchanges. Investigate opportunities to obtain SWP water from Morro Bay
by providing incentives for Morro Bay to fully utilize its desalination plant capacity.
Land Fallowing. Evaluate potential agreements with local agriculture representatives to offer financial
incentives to fallow land within the Arroyo Grande and Cienega Valleys to make that irrigation water
available for municipal use.
Enhanced Conservation. Evaluate opportunities for enhanced water conservation by the Zone 3 agencies
(e.g., water rationing, no outdoor watering, agriculture water restrictions) to preserve additional water.
Nacimiento/California Men’s Colony Intertie. Complete design of a pipeline that would connect the NWP
pipeline to the California Men’s Colony (CMC) Water Treatment Plant. Investigate opportunities for Zone 3
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agencies to purchase NWP water and use exchange agreements and existing infrastructure to deliver
additional water to Zone 3 through the Coastal Branch pipeline.
Urban Water Management Plans
Arroyo Grande, Pismo Beach, and Grover Beach prepared updated 2015 UWMPs in 2016, 2017, and 2020,
respectively. All three agencies are in the process of updating UWMPs to meet the 2020 update requirement.
OCSD is not required to prepare an UWMP because the community population does not meet the minimum
requirement threshold; however, many of the aspects of a UWMP are addressed through OCSD’s participation
in the NCMA planning process. The NCMA TG believes that the UWMP process by each individual agency is
adequate and that a coordinated UWMP is not necessary.
Coordinated and Shared Data
Regular monitoring of activities that affect the groundwater basin and sharing of that information have
occurred for many years. The monitoring efforts include gathering data on hydrologic conditions, water supply
and demand, and groundwater pumping, levels, and quality. The current monitoring program is managed by
the NCMA agencies in accordance with the 2005 Stipulation and the 2008 Judgment, guided by the July 2008
Monitoring Program for the NCMA. The monitoring data and a summary of groundwater management activities
are summarized in the annual reports. Arroyo Grande, Grover Beach, and Pismo Beach have each evaluated
their future water demands as part of their respective UWMPs. The NCMA shares information with the two
other management areas (NMMA and SMVMA) through data exchange throughout the annual report
preparation cycle.
7.2.4 Manage Groundwater Levels and Prevent Seawater Intrusion
Strategies:
Use stormwater ponds to capture stormwater runoff and recharge the groundwater basin.
Install transducers in key monitoring wells to provide continuous groundwater elevation data. The following
wells have transducers:
24B03 (North Beach Campground)
30F03 (Highway 1)
30N02 (Pier Avenue)
36L01 (Oceano Dunes)
36L02 (Oceano Dunes)
32C03 (County Monitoring Well No. 3)
Collect and evaluate daily municipal pumping data to determine the impact on local groundwater elevation
levels.
Discussion:
Prevention of seawater intrusion through the management of groundwater levels is essential to protect the
shared resource. The NCMA agencies increase groundwater recharge with stormwater infiltration and closely
monitoring groundwater levels and water quality in sentry wells along the coast.
Arroyo Grande and Grover Beach each maintain stormwater retention ponds within their jurisdictions; the
SLOFCWCD maintains the stormwater system, including retention ponds, in OCSD. These ponds collect
stormwater runoff, allowing it to recharge the underlying aquifers. There are approximately 140 acres of
detention ponds in Arroyo Grande and 48 acres of detention ponds in Grover Beach. The stormwater detention
pond in OCSD is approximately one-half acre. Grover Beach modified its stormwater system in 2012 to direct
additional flow into one of its recharge basins.
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The San Luis Obispo County Stormwater Resource Plan (Stormwater Resource Plan) (SLO Co., 2019) was
submitted to the SWRCB for review on February 28, 2019; final approval of the plan was attained on February
25, 2020. The purpose of the Stormwater Resource Plan is to identify and prioritize stormwater and dry
weather runoff capture projects in the County through detailed analyses of watershed conditions and
processes, surface and groundwater resources, and the multiple benefits that can be achieved through
stormwater-related capital projects and other programmatic actions (SLO Co., 2019). The Stormwater
Resource Plan identifies four proposed projects within the NCMA, including the Pismo Preserve Roads
Improvement Project, the Oceano Drainage Improvement Project (which was completed in 2020), South
Halcyon Green/Complete Street, and a stormwater infiltration basins project. In 2019, Oceano CSD started
design of the Oceano Stormwater Capture and Groundwater Recharge Project These proposed projects
emphasize water supply augmentation, environmental restoration and other community benefits, including an
estimated annual infiltration capacity of 26 AF and an instantaneous floodwater capture capacity of 3.37 AF
(SLO Co., 2019).
Although closely related to the objectives to manage pumping, monitor supply and demand, and share
information, this objective to manage groundwater levels and prevent seawater intrusion also specifically
recognizes the proximity of production wells to the coast and the threat of seawater intrusion. The NCMA
agencies and SLOFCWCD have long cooperated in the monitoring of groundwater levels, including quarterly
measurement by the NCMA of groundwater levels in sentry wells at the coast. Upon assuming responsibility
for the coastal monitoring wells, the NCMA became aware of the need to upgrade the condition of the sentry
wells. In July 2010 the wellheads (surface completions) at the four sentry monitoring well clusters in the NCMA
were renovated (Todd, 2010). The renovations included raising the elevations of the top of each individual
well casing by 2 to 3 feet and resurveying relative to the NAVD 88 standard in late September 2010 (Wallace
Group, 2010). The individual well casings are now above the ground surface and protective locking steel risers
enclose each cluster. As a result of this work, the sentry wells in the NCMA now are protected from surface
contamination and tampering.
Quarterly measurement of groundwater levels aids in assessing the risk of seawater intrusion along the coast.
To enhance the data collection and assessment efforts, the NCMA installed transducers in four of the key
sentry monitoring wells (24B03, 30F03, 30N02, and 24B01) to provide continuous groundwater levels at key
locations (the transducer in the shallow completion 24B01 was later removed). By combining these data with
the collection and evaluation of daily municipal pumping data, the NCMA is better able to determine the
response of local groundwater levels to extractions and, therefore, can better manage the aquifer and NCMA
portion of the SMGB.
To gain insight into water level fluctuation and water quality variation in the area between the NCMA and
NMMA, a continuous monitor was installed in County Monitoring Well #3 (32C03), which was constructed and
is owned by the County as part of the County-wide groundwater monitoring network. Water level monitoring
was initiated in April 2012, when sensors were installed to document water level, temperature, and specific
conductivity.
In 2015, continuous monitoring sensors were installed in coastal monitoring wells 36L01 and 36L02 located
in the Oceano Dunes. Data from the transducers in these wells now are collected on a quarterly basis along
with the other sentry wells.
Additional studies to enhance basin management efforts that have been discussed by the NCMA TG include
the following:
Consider implementation of a monthly water level elevation data analysis of the sentry wells during periods
when the Deep Well Index value is below the index target of 7.5 feet above sea level for an extended
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period. Given that the index value generally has remained steady because of reduced groundwater
pumping, the NCMA has deferred the issue of monthly analysis.
Consider implementation of a monthly analysis of electrical conductivity data from the wells with downhole
transducers during periods when the Deep Well Index value is below the index target of 7.5 feet to track
potential water quality degradation (an enhanced monitoring schedule of County Monitoring Well No. 3 is
not necessary because background water quality does not change or fluctuate significantly). If electrical
conductivity data suggest water quality degradation, implement a monthly sampling and monitoring
program. Given that the index value generally has remained steady because of reductions in groundwater
pumping, the NCMA has deferred the issue of monthly analysis.
Assess the potential impacts on sentry well groundwater elevations from extended periods of increased
groundwater pumping by conducting analytical modeling analyses to predict water level responses given
certain pumping scenarios. These analyses may prove fruitful as scenarios unfold regarding decreased
SWP deliveries or short-term emergency cuts to Lopez Lake deliveries. Utilization of the Phase 1B model
may be used for this purpose in the future.
7.2.5 Protect Groundwater Quality
Strategies:
Perform quarterly water quality monitoring at all sentry wells and County Well No. 3.
Gather continuous (every 4 hours) pressure (converts to depth to water), temperature, and electrical
conductivity data from select monitoring wells to track water quality indicators for seawater intrusion.
Prepare an SNMP pursuant to state policy using the results of the SMGB characterization study (Fugro,
2015).
Construct the Central Coast Blue facility.
Support regional recycled water project planning through performance of a Recycled Water Facility
Planning Study (RWFPS) by the SSLOCSD. The RWFPS was completed in 2017.
Discussion:
The objective to protect groundwater quality is closely linked with the objective for monitoring and data sharing.
To meet this objective, all sources of water quality degradation, including the threat of seawater intrusion,
need to be recognized. Water quality threats and possible degradation affect the integrity of the groundwater
basin, potentially resulting in loss of use or the need for expensive water treatment processes. Sentry wells
are monitored quarterly for water quality and data from other NCMA production wells are assessed annually.
The monitoring program includes evaluation of potential contaminants in addition to those that might indicate
seawater intrusion. Temperature and electrical conductivity probes have been installed in six monitoring wells
to provide continuous water quality tracking for early indication of seawater intrusion.
The NCMA agencies participated in the oversight of the performance of the SMGB characterization study
(Fugro, 2015). The project was conducted, in part, to prepare for and to provide the foundational data for
preparation of a basinwide SNMP. To date, the SNMP has not been initiated.
Investigations continued throughout 2020 for work associated with the Central Coast Blue project. These
efforts continue to follow up on Pismo Beach’s RWFPS to investigate alternatives for constructing a recycled
water system that will enable the NCMA agencies to beneficially use recycled water to augment their
groundwater supply and provide a new, drought-proof source of water supply for the area.
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7.2.6 Manage Cooperatively
Strategies:
Improve outreach to the agricultural community by enhancing coordination with local growers.
Coordinate groundwater monitoring data sharing and annual report preparation with the NCMA, NMMA,
and the SMVMA.
Improve interagency coordination among the NCMA agencies and include the County.
Discussion:
Since 1983, NCMA management has been based on cooperative efforts of the affected parties, including the
NCMA agencies, private agricultural groundwater users, the County, the SLOFCWCD, and other local and state
agencies. Specifically, the NCMA agencies have limited their pumping and, in cooperation with SLOFCWCD,
invested in surface water supplies to reduce groundwater pumping to not exceed the safe yield of the NCMA
portion of the SMGB. Other organizations participate as appropriate. In addition to the efforts discussed in this
2020 Annual Report, cooperative management occurs through many other venues and forums, including
communication by the NCMA agencies in their respective public meetings and participation in the WRAC.
The NCMA agencies participated in preparation and adoption of the 2014 update of the County IRWMP. The
IRWMP promotes integrated regional water management to ensure sustainable water uses, reliable water
supplies, better water quality, environmental stewardship, efficient urban development, protection of
agriculture, and a strong economy. The IRWMP integrates all the programs, plans, and projects within the
region into water supply, water quality, ecosystem preservation and restoration, groundwater monitoring and
management, and flood management programs.
Since the 2008 Judgment, the NCMA has taken the lead in cooperative management of its management area.
The NCMA TG met monthly (at a minimum) throughout 2020 and has been a willing and active participant in
the SMGBMA technical subcommittee, which first met in 2009 (the SMGBMA technical subcommittee did not
meet in 2020). The purpose of the SMGBMA technical subcommittee is to coordinate efforts such as enhanced
monitoring of groundwater levels and improved sharing of data among the management areas. With the
current threats to water supply in all management areas, greater communication, analytical collaboration, and
data sharing are encouraged, especially between NCMA and NMMA.
Actions initiated by NCMA in early 2016 resulted in increased discussion and collaboration between the NCMA
and NMMA that is ongoing. The NCMA-NMMA Management Coordination Committee has met several times
since 2017 to discuss items of mutual concern and develop strategies for addressing the concerns.
Another area of increased mutual collaboration between the NCMA and NMMA was the formation of a
technical team, consisting of representatives from the NCMA and NMMA, to collaboratively develop a single
data set of water level data points to prepare a consistent set of semiannual water level contour maps for the
NCMA and NMMA, so that the maps from each management area would represent a mutually agreed upon
condition at the NCMA/NMMA boundary. This collaboration continued throughout 2020 through continued
assessment and evaluation of the water level database, sharing of new data, and discussions of knowledge
of hydrogeologic conditions gained. The result has been a series of groundwater elevation contour maps of
both the NCMA and the NMMA that reflect water level conditions at the NCMA/NMMA boundary.
A Modeling Subcommittee, composed of representatives from the NCMA and NMMA, was formed to discuss
the development of a numerical groundwater flow model of the portion of the SMGB north of the Santa Maria
River. When the Phase 1B groundwater flow model project was initiated in 2017, representatives from this
subcommittee formed a technical review and advisory committee to provide input to the modeling consultant
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and monitor progress. An NMMA representative participated in the technical review and in an advisory capacity
throughout the development of the Phase 1B model. The Modeling Subcommittee has not met since
completion of the Phase 1B modeling project.
7.2.7 Encourage Water Conservation
Strategies:
Share updated water conservation information.
Implement UWMPs.
Discussion:
Water conservation, or water use efficiency, is linked to the monitoring of supply and demand and the
management of pumping. Water conservation reduces overall demand on all sources, including groundwater,
and supports management objectives to manage groundwater levels and prevent seawater intrusion. In
addition, water conservation is consistent with state policies seeking to achieve a 20 percent reduction in
water use by the year 2020 (DWR et al., 2010). Water conservation activities in the NCMA are summarized in
various documents produced by the NCMA agencies, including the 2015 UWMPs of Arroyo Grande, Pismo
Beach, and Grover Beach. (OCSD is not required to prepare an UWMP.)
In addition to ongoing water conservation efforts, the drought conditions that extended throughout 2016 led the
NCMA agencies to increase their efforts to reduce water use. The statewide mandatory water conservation
requirements (signed into law on April 1, 2015, by the governor [Executive Order B-29-15]) that enacted mandatory
water conservation requirements because of statewide drought conditions and the historic low Sierra snowpack
measurements were continued throughout 2016 and into early 2017. On April 7, 2017, the State of California
lifted the drought emergency and mandated water use restrictions throughout the state.
The water conservation measures instituted by each NCMA agency are summarized below.
Arroyo Grande
On April 7, 2017, the State of California took action to lift the drought emergency and mandated water use
restrictions throughout the state. The action also eliminated the State’s mandate for Arroyo Grande to save
28 percent of its water use. In response, the Arroyo Grande City Council approved and adopted a resolution in
May 2017, rescinding the Stage 1 Water Shortage Emergency in the City, which removes the temporary water
use limitations that established individualized water budgets for all residential customers. During the State-
mandated Stage 1 restrictions, Arroyo Grande’s water use reduction was, on average, 42 percent compared
with 2013, thereby meeting and exceeding the state mandates.
The City Council’s action was based on a determination that there is no immediate or imminent threat to the
City’s ability to meet the community’s water supply needs. However, all established mandatory water use
restrictions remained in effect, including limitations on outdoor irrigation and continued adherence to four-day
outdoor irrigation based on the property address. These mandatory water use restrictions remain in place.
Mandatory water conservation measures include the following:
Use of water that results in excessive gutter runoff is prohibited.
No water will be used for cleaning driveways, patios, parking lots, sidewalks, streets, or other such use
except where necessary to protect the public health and safety.
Outdoor water use for washing vehicles will be attended and have hand-controlled water devices.
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Outdoor irrigation is prohibited between 10 a.m. and 4 p.m.
Irrigation of private and public landscaping, turf areas, and gardens is permitted at even-numbered
addresses only on Mondays and Thursdays, and at odd-numbered addresses only on Tuesdays and
Fridays.
No irrigation of private and public landscaping, turf areas, and gardens is permitted on Wednesdays.
Irrigation is permitted at all addresses on Saturdays and Sundays.
In all cases, customers are directed to use no more water than necessary to maintain landscaping.
Emptying and refilling swimming pools and commercial spas is prohibited except to prevent structural
damage and/or to provide for the public health and safety.
Use of potable water for soil compaction or dust control purposes in construction activities is prohibited.
New swimming pools may be constructed; however, they will have a cover that conforms to the size and
shape of the pool and acts as an effective barrier to evaporation. The cover must be in place during periods
when use of the pool is not reasonably expected to occur.
Hotel, motel, or other commercial lodging establishments will offer patrons the option to forego the daily
laundering of towels, sheets, and other linens.
Restaurants or other commercial food service establishments will not serve water except upon the request
of a patron.
To help manage the use of water, the City offers water conservation incentive programs designed to decrease
overall water use. The conservation and incentive programs include the following:
Plumbing Retrofit Program. This program includes installation or adjustment of showerheads, toilets,
faucet aerators, and pressure regulators for single-family and multi-family residential units constructed
before 1992. This program has been in place since 2004 at an expense to the City of more than $1.55
million.
Water-Wise Landscaping Program. This program provides resources for designing and installing water-
wise landscaping in San Luis Obispo County, selecting climate-appropriate plants, and irrigation and
drainage improvements that will help residents improve their landscaping and protect the watershed.
Washing Machine Rebate. This program pays water customers a one-time rebate for the installation of a
certified energy-efficient Tier 3 washing machine.
Mandatory Plumbing Retrofit. Upon change of ownership of any residential property, the seller must
retrofit the property’s plumbing fixtures to meet defined low-water-use criteria.
Water Conservation Hotline.
Pismo Beach
In 2014, Pismo Beach introduced the first-in-the-state waterless urinal mandate and a 0.5-gallon per minute
(gpm) restroom aerator retrofit requirement. The components of this program include the following:
Waterless urinal retrofits. All existing urinals in the City were retrofitted to waterless urinals before
February 14, 2016.
Faucet aerators. New residential restroom construction requires faucets that are fitted with aerators that
emit no more than 0.5 gpm. Restroom faucets in all publicly accessible restrooms, including those in hotel
rooms, lobbies and restrooms, restaurants, schools, commercial and retail buildings, public buildings, and
similar publicly accessible restrooms were retrofitted to install aerators that emit no more than 0.5 gpm.
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Sub-meters in new construction. All new multi-unit buildings, regardless of proposed use, were required
to have a separate sub-meter capable of measuring the water use of every usable unit, separate common
space, and landscaping that is expected to use at least 25 gallons of water per day on average for the
course of a year, regardless of the overall size of the building. Buildings that have a separate water meter
for each unit are exempt.
Also in 2014, Pismo Beach adopted several Water Conservation Incentive Programs to help reduce water
consumption and ensure reliable future water supply. On February 16, 2016, the Pismo Beach City Council
updated the Water Conservation Incentive Programs list to include the following:
Cash for Grass. This program reimburses residents for each square foot of lawn removed (minimum 300
square feet) and replaced with drought-tolerant landscaping, which is required to have an automatic timer
and drip or micro-spray irrigation.
Free Catch Bucket Program. This program gives residents one free shower catch bucket for capturing
unused shower water and re-purposing it for irrigation or utility purposes.
Rain Barrel Rebate Program. This program reimburses residents up to $100 ($50 per rain barrel) when
up to two rain barrels are purchased and installed to use rainwater, conserve potable water, and reduce
stormwater runoff.
Water-Wise Landscaping Program. This program provides resources for designing and installing water-
wise landscaping in San Luis Obispo County, selecting climate-appropriate plants, and irrigation and
drainage improvements that will help residents improve their landscaping and protect the watershed.
High Efficiency Toilet Rebate Program. This program provides a one-time rebate for each 3.5-gallon-per-
flush or higher toilet replaced with a 1.28-gallon-per-flush or lower toilet.
Water Conservation Hotline.
In January 2017, Pismo Beach adopted an updated schedule of development impact fees to include new
recycled water fees for all new development, redevelopment, and additions to existing buildings that create
additional dwelling units or additional non-residential floor area, to help fund the cost of the Central Coast
Blue project.
In June 2017, in response to the State of California action to lift the drought emergency and State-mandated
water use restrictions throughout the state, Pismo Beach declared a “Normal Water Supply” and adopted an
Urgency Ordinance O-2017-003, revising the restrictions associated with each water supply status to conform
to State mandates. The restrictions for a Normal Water Supply include the following:
Use of water that causes runoff onto adjacent properties, non-irrigated areas, private and public walkways,
roadways, gutters, parking lots or structures is prohibited.
Outdoor water use for washing vehicles, boats, paved surfaces, buildings, and similar uses shall be
attended and have hand-controlled water devices, which shut off the water immediately when not in use.
No water will be used for cleaning driveways, patios, parking lots, sidewalks, streets, or other such uses
except as found necessary by the city to protect the public health or safety.
Outdoor Irrigation:
Outdoor irrigation is prohibited between 10 a.m. and 4 p.m.
Applying water to outdoor landscapes during and within 48 hours following measurable precipitation
is prohibited.
Restaurants will serve drinking water only in response to a specific request by a customer.
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Using water in a fountain or other decorative water feature, except where the water is part of a recirculating
system, is prohibited.
The use of outdoor irrigation during, and 48 hours following, measurable precipitation is prohibited.
Grover Beach
Between 2011 and 2014, Grover Beach declared Stage I and Stage II water shortage conditions and
implemented conservation measures including public outreach and education and voluntary prohibitions on
water use. In June 2014, Grover Beach declared a Stage III Water Shortage that required all water customers
to reduce their water usage by 10 percent. Many of the prohibitions that had previously been voluntary since
declaration of the Stage II Water Shortage Declaration became mandatory with the Stage III declaration. The
declaration also provided the City with the authority to impose penalties for failure to comply with the water
reduction or use prohibitions. Declaration of the Stage III Water Shortage in 2014 made mandatory many of
the conservation measures and prohibitions that had previously been implemented prior to 2014. Although
the drought declaration was lifted in 2017, all established mandatory water use restrictions remained in effect
to encourage conservation. These prohibitions include:
Washing of sidewalks, driveways, or roadways where air blowers or sweeping provides a reasonable
alternative.
Refilling of private pools except to maintain water levels.
Planting of turf and other new landscaping, unless it consists of drought-tolerant plants.
Washing vehicles, boats, etc. without a quick-acting shut-off nozzle on the hose.
Washing any exterior surfaces unless using a quick-acting shut-off nozzle on the hose.
Restaurant water service, unless requested.
Use of potable water for construction purposes, unless no other source of water or method can be used.
Operation of ornamental fountain or car wash unless water is re-circulated.
In 2020, Grover Beach made changes to its water conservation program through preparation and adoption of
a Water Shortage Contingency Plan (WSCP),23 enacted when water supplies are insufficient to support
demand. As droughts and other events impacting water supply occur more frequently and intensely, the WSCP
helps prepare for and respond to water shortages. The changes include six stages of action tied to actual
water shortage conditions in 10 percent increments. Each stage relates a supply reduction range to an
associated demand reduction target, which may vary based on the nature of triggering conditions that are
dependent on the cause, severity, and anticipated duration of the water supply shortage. Grover Beach city
staff continuously monitor the availability of water supply sources 24 and, if one or more set of triggering
conditions are met, the Public Works Director notifies the City Council and recommends declaration of the
appropriate stage of water shortage.
23 The WSCP is a component of the City of Grover Beach’s 2015 UWMP, finalized and submitted in April 2020.
24 Including monitoring of Lopez Lake supplies and monitoring of groundwater availability based on the Deep Well Index value
as compared with its threshold value of 7.5 feet NAVD 88.
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In addition to mandatory water use prohibitions, Grover Beach has implemented water conservation incentive
programs including the following:
Cash for Grass Rebate Program
Smart Irrigation Controller and Sensor Rebate Program
Toilet Fixture, Showerhead, and Sink Aerator Retrofit Rebate Program
Washing Machine Rebate Program
Oceano CSD
Given the population of its service area, OCSD is not required to prepare an UWMP nor was it required to
reduce water consumption as mandated by the Governor for urban water suppliers during the recent drought.
Outdoor water use restrictions have been adopted, as required. In April 2015, OCSD adopted a rate increase
that included tiered rates to promote water conservation. These rates were reduced in July 2017, upon
adoption of the Post Drought Consumption Charges and Supplemental Water Charge Ordinance. In October
2020, the OCSD increased water rates and a new water rate structure was adopted that reduced the number
of consumption tiers from five to two. This brought the OCSD rates more closely into conformance with
Proposition 218 requirements. The Tier 1 rate is tied directly to the cost of the Lopez Water supply and the
Tier 2 rate is tied directly to the cost of the State Water supply. In addition, the new rate structure eliminated
the six units of water previously included in the base rate so that customers now pay a consumption charge
for every unit of water used, which further promotes conservation.
OCSD pumped only 2 percent of its groundwater entitlement in 2020 and is using Lopez Lake surplus water
in addition to its Lopez Lake allocation and SWP supply. Meanwhile, OCSD’s conservation efforts continue to
exceed the Governor’s drought-mandated goal (since rescinded) of 25 percent.
Strategies exist in the event of temporary non-delivery of SWP and Lopez Lake water and other unforeseen
circumstances. Post-drought strategies include resumption of groundwater pumping, resumption of Lopez
Lake deliveries, and storage of SWP water as provided in SWP contracts.
7.2.8 Evaluate Alternative Sources of Supply
Strategies:
Evaluate expanded use of recycled water, including implementation of Central Coast Blue.
Analyze the capacity of the Lopez Lake and Coastal Branch pipelines to maximize deliveries of surface
water. The following analyses have been completed:
Lopez Lake Pipeline Capacity Evaluation (WSC, 2011a)
Lopez Lake Pipeline Capacity Re-Evaluation (WSC, 2011b)
Coastal Branch Capacity Assessment (WSC, 2011a)
Lopez Bypass and State Water Delivery Evaluation (WSC, 2017)
Optimize existing surface water supplies, including surface water storage, through the development of a
framework for interagency exchanges and transfers, including SWP and Lopez Lake supplies.
Maximize Lopez Lake pipeline capacity.
Discussion:
The NCMA agencies continue to evaluate alternative sources of water supply that could provide a more reliable
and sustainable water supply for the NCMA. An expanded portfolio of water supply sources will support
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sustainable management of the groundwater resource and help to reduce the risk of water shortages. These
alternative sources include the following:
State Water Project. OCSD and Pismo Beach are currently SWP customers. Both agencies increased their
SWP allocations by securing “drought buffers” to increase the availability of supply during periods of SWP
shortfalls. Grover Beach and Arroyo Grande are not SWP customers. However, Arroyo Grande approved a
measure in 2016 authorizing the City to purchase SWP water from the SLOFCWCD’s excess entitlement
on a temporary basis and only during a declared local water emergency. To date, Arroyo Grande has not
declared such an emergency and has not purchased SWP water.
Water Recycling. As discussed in Section 7.2.5, Pismo Beach and the SSLOCSD both prepared RWFPSs
to evaluate alternatives for a recycled water program that could provide a supplemental water supply
source and improve the water supply reliability for the Pismo Beach and the SSLOCSD member agencies
(Arroyo Grande, Grover Beach, and OCSD).
Section 7.2.5 also describes ongoing efforts for Central Coast Blue that will enable the NCMA agencies to
produce recycled water to augment their water supplies. Construction of the new facility will allow for the
use of recycled water to recharge the groundwater basin and provide a new, drought-proof source of water
supply for the area. As conceived, the project includes construction of a distribution system that will inject
advanced purified water into the SMGB and will allow the NCMA agencies to increase recharge to the
aquifer, improve water supply reliability, and help prevent future occurrences of seawater intrusion.
Lopez Lake Expansion. In 2008, the County sponsored a preliminary assessment of the concept of
installing an inflatable rubber dam at the Lopez Dam spillway. Subsequently, the SLOFCWCD CSA 12 and
Arroyo Grande, Grover Beach, and Pismo Beach funded a study to further analyze the feasibility of
increasing the yield of Lopez Lake by raising the spillway height with an inflatable dam or permanent
extension. The study was finalized in 2013 and identified the potential to increase the annual yield from
Lopez Lake by 500 AFY with a spillway height increase of 6 feet (Stetson, 2013). The NCMA agencies and
Zone 3 are continuing to evaluate other aspects of the project, including impacts on the Habitat
Conservation Plan process.
Desalination. In 2006, Arroyo Grande, Grover Beach, and OCSD used Proposition 50 funds to complete a
feasibility study on desalination as an additional water supply option for the NCMA. This alternative supply
is not considered to be a viable option at this time.
When PG&E announced plans to close its Diablo Canyon Power Plant, previous efforts by the SLOFCWCD
to (1) evaluate the potential to expand the existing desalination facility at the PG&E Diablo Canyon Power
Plant and (2) connect it to the Lopez Lake pipeline to provide a supplemental water supply for the Zone 3
agencies were terminated.
Nacimiento Pipeline Extension. In 2006, Arroyo Grande, Grover Beach, and OCSD completed an
evaluation of a Nacimiento pipeline extension to determine the feasibility of delivery of water from the
Nacimiento reservoir to the NCMA. This alternative supply is not considered to be a viable option at this
time.
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SECTION 8: References
Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. 1998. Crop Evapotranspiration: Guidelines for Computing
Crop Water Requirements: Food and Agriculture Organization of the United Nations, Irrigation and
Drainage Paper 56, 300p.
Cal Poly. 2019. California Evapotranspiration Data for Irrigation District Water Balances, Irrigation Training &
Research Center, San Luis Obispo, CA 93407-0730.
Carollo Engineers. 2011. City of Pismo Beach 2010 Urban Water Management Plan.
City of Arroyo Grande. 2017. Amended Final Draft, 2015 Urban Water Management Plan, City of Arroyo
Grande.
City of Grover Beach. 2010. City of Grover Beach 2010 Urban Water Management Plan.
DWR. 1970. Sea-Water Intrusion: Pismo-Guadalupe Area. Bulletin No. 63-3, 76 p. Prepared by the California
Department of Water Resources.
DWR. 1975. Sea-Water Intrusion in California, Inventory of Coastal Ground Water Basins, Bulletin No. 63-5.
Prepared by the California Department of Water Resources.
DWR. 1979. Ground Water in the Arroyo Grande Area, Southern District Report. Prepared by the California
Department of Water Resources.
DWR. 2002. Water Resources of the Arroyo Grande – Nipomo Mesa Area: Southern District Report. Prepared
by the California Department of Water Resources.
DWR. 2016. IWFM Demand Calculator IDC 2015: Theoretical Documentation and User’s Manual. Central
Valley Modeling Unit. Prepared by the California Department of Water Resources Bay Delta Office.
DWR et al. 2010. 20X2020 Water Conservation Plan. Prepared by the California Department of Water
Resources, State Water Resources Control Board, California Bay-Delta Authority, California Energy
Commission, California Department of Public Health, California Public Utilities Commission, California
Air Resources Board.
Fugro. 2015. Santa Maria Groundwater Basin Characterization and Planning Activities Study, Final Report.
Prepared for San Luis Obispo County Flood Control and Water Conservation District, December 30,
2015. Prepared by Fugro Consultants, Inc.
Geoscience Support Services. 2019. City of Pismo Beach and South San Luis Obispo County Sanitation
District, Central Coast Blue Phase 1B Hydrogeologic Evaluation. Prepared for Water Systems
Consulting, Inc., November 25, 2019. Prepared by Geoscience Support Services, Inc.
Miller, G. A. and R.E. Evenson. 1966. Utilization of Groundwater in the Santa Maria Valley Area, California.
USGS Water Supply Paper 1819-A.
Mualem, Y. 1976. “A new model for predicting the hydraulic conductivity of unsaturated porous media.”
Water Resources Res., 12, 513-522.
Northern Cities Management Area. 2008. Annual Monitoring Report, prepared by Todd Engineers. April
2009.
Northern Cities Management Area. 2009. Annual Monitoring Report, prepared by Todd Engineers. April
2010.
Northern Cities Management Area. 2010. Annual Monitoring Report, prepared by GEI Consultants. April
2011.
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Northern Cities Management Area. 2011. Annual Monitoring Report, prepared by GEI Consultants. May
2012.
Northern Cities Management Area. 2012. Annual Monitoring Report, prepared by GEI Consultants. April
2013.
Northern Cities Management Area. 2013. Annual Monitoring Report, prepared by Fugro Consultants. April
2014.
Northern Cities Management Area. 2014. Annual Monitoring Report, prepared by Fugro Consultants. April
2015.
Northern Cities Management Area. 2015. Annual Monitoring Report, prepared by Fugro Consultants. April
2016.
Northern Cities Management Area. 2016. Annual Monitoring Report, prepared by GSI Water Solutions, Inc.
April 2017.
Northern Cities Management Area. 2017. Annual Monitoring Report, prepared by GSI Water Solutions, Inc.
April 2018.
Northern Cities Management Area. 2018. Annual Monitoring Report, prepared by GSI Water Solutions, Inc.
April 2019.
Nipomo Mesa Management Area. 2010. 2nd Annual Report, Calendar Year 2009, prepared by the NMMA
Technical Group, April 2010.
Nipomo Mesa Management Area. 2011. 3rd Annual Report, Calendar Year 2010, prepared by the NMMA
Technical Group, April 2011.
Nipomo Mesa Management Area. 2012. 4th Annual Report, Calendar Year 2011, prepared by the NMMA
Technical Group, April 2012.
Nipomo Mesa Management Area. 2013. 5th Annual Report, Calendar Year 2012, prepared by the NMMA
Technical Group, April 2013.
Nipomo Mesa Management Area. 2014. 6th Annual Report, Calendar Year 2013, prepared by the NMMA
Technical Group, April 2014.
Nipomo Mesa Management Area. 2015. 7th Annual Report, Calendar Year 2014, prepared by the NMMA
Technical Group, April 2015.
Nipomo Mesa Management Area. 2016. 8th Annual Report, Calendar Year 2015, prepared by the NMMA
Technical Group, April 2016.
Nipomo Mesa Management Area, 9th Annual Report, Calendar Year 2016, prepared by the NMMA Technical
Group, April 2017.
PG&E. 2014. Central Coastal California Seismic Imaging Project (CCSIP), report to the California Public
Utilities Commission. http://www.pge.com/en/safety/systemworks/dcpp/seismicsafety/report.page
Prepared by Pacific Gas and Electric Company.
SLO Co. 2019. San Luis Obispo County Stormwater Resource Plan. Submitted to the State Water Resources
Control Board on February 28, 2019. Prepared by San Luis Obispo County.
SLOFCWCD. 2014. Low Reservoir Response Plan for the San Luis Obispo County Flood Control and Water
Conservation District Zone 3. Prepared by the San Luis Obispo County Flood Control and Water
Conservation District Zone 3.
Stetson. 2013. Lopez Lake Spillway Raise Project Report. Prepared by Stetson Engineers, Inc.
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Todd. 2007. Water Balance Study for the Northern Cities Area. Prepared by Todd Engineers.
Todd. 2008. Monitoring Program for the Northern Cities Management Area. Prepared by Todd Engineers.
Todd. 2010. Summary of Renovations for the Northern Cities Management Area Sentry Wells, San Luis
Obispo County, California. Prepared by Todd Engineers.
U.S. Geological Survey. 2006. Quaternary fault and fold database for the United States.
http://earthquake.usgs.gov/regional/qfaults
van Genuchten, M.T. 1985. “A closed-form solution for predicting the conductivity of unsaturated soils.” Soil
Sci. Soc. Am. J., 44, 892-898.
Wallace Group. 2010. Survey Report on the “Sentry” Well Elevation Establishment for Cities of Arroyo
Grande, Grover Beach, Pismo Beach and the Oceano Community Services District.
WSC. 2011a. Capacity Assessment of the Coastal Branch, Chorro Valley, & Lopez Pipelines. Prepared by
Water Systems Consulting, Inc. for the San Luis Obispo County Flood Control and Water Conservation
District and the Central Coast Water Authority. Prepared by Water Systems Consulting, Inc.
WSC. 2011b. Lopez Pipeline Re-Evaluation Technical Memorandum. Prepared by Water Systems Consulting,
Inc. for the San Luis Obispo County Flood Control and Water Conservation District and the Central
Coast Water Authority. Prepared by Water Systems Consulting, Inc.
WSC. 2014. Final Draft Strategic Plan for the Northern Cities Management Area Technical Group, June
2014. Prepared by Water Systems Consulting, Inc.
WSC. 2015. Recycled Water Facilities Planning Study – Final: prepared for the City of Pismo Beach, April
2015. Prepared by Water Systems Consulting, Inc.
WSC. 2017. Lopez Bypass & State Water Delivery Evaluation. Prepared for the San Luis Obispo County Flood
Control and Water Conservation District. Prepared by Water Systems Consulting, Inc.
Woodring, W.P and M.N. Bramlette. 1950. “Geology and Paleontology of the Santa Maria District, California.”
U.S. Geological Survey, Professional Paper 222, 142 p.
Worts, G.G., Jr. 1951. “Geology and Ground-water Resources of the Santa Maria Valley Area, California.” U.S.
Geological Survey Water-Supply Paper 1000, 176 p.
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APPENDIX A
NCMA Sentry Well Water Level and Water Quality Data
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Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B01 North Beach Shallow Alluvium 10/7/2020 6.27 Stove Pipe Top of Steel 13.58 7.31
32S/12E-24B01 North Beach Shallow Alluvium 7/6/2020 5.94 Stove Pipe Top of Steel 13.58 7.64
32S/12E-24B01 North Beach Shallow Alluvium 4/17/2020 5.93 Stove Pipe Top of Steel 13.58 7.65
32S/12E-24B01 North Beach Shallow Alluvium 1/7/2020 5.80 Stove Pipe Top of Steel 13.58 7.78
32S/12E-24B01 North Beach Shallow Alluvium 10/9/2019 6.22 Stove Pipe Top of Steel 13.58 7.36
32S/12E-24B01 North Beach Shallow Alluvium 7/9/2019 6.07
Stove Pipe Top of Steel 13.58 7.51
32S/12E-24B01 North Beach Shallow Alluvium 4/9/2019 6.40
Stove Pipe Top of Steel 13.58 7.18
32S/12E-24B01 North Beach Shallow Alluvium 1/8/2019 5.95
Stove Pipe Top of Steel 13.58 7.63
32S/12E-24B01 North Beach Shallow Alluvium 10/9/2018 6.29 Stove Pipe Top of Steel 13.58 7.29
32S/12E-24B01 North Beach Shallow Alluvium 7/10/2018 7.00 Stove Pipe Top of Steel 13.58 6.58
32S/12E-24B01 North Beach Shallow Alluvium 4/10/2018 6.48 Stove Pipe Top of Steel 13.58 7.10
32S/12E-24B01 North Beach Shallow Alluvium 1/10/2018 6.00 Stove Pipe Top of Steel 13.58 7.58
32S/12E-24B01 North Beach Shallow Alluvium 10/10/2017 6.12 Stove Pipe Top of Steel 13.58 7.46
32S/12E-24B01 North Beach Shallow Alluvium 7/11/2017 6.74 Stove Pipe Top of Steel 13.58 6.84
32S/12E-24B01 North Beach Shallow Alluvium 4/11/2017 6.30 Stove Pipe Top of Steel 13.58 7.28
32S/12E-24B01 North Beach Shallow Alluvium 1/10/2017 5.54 Stove Pipe Top of Steel 13.58 8.04
32S/12E-24B01 North Beach Shallow Alluvium 10/12/2016 6.54 Stove Pipe Top of Steel 13.58 7.04
32S/12E-24B01 North Beach Shallow Alluvium 7/19/2016 6.78 Stove Pipe Top of Steel 13.58 6.80
32S/12E-24B01 North Beach Shallow Alluvium 4/12/2016 6.35 Stove Pipe Top of Steel 13.58 7.23
32S/12E-24B01 North Beach Shallow Alluvium 1/12/2016 5.17 Stove Pipe Top of Steel 13.58 8.41
32S/12E-24B01 North Beach Shallow Alluvium 10/13/2015 5.73 Stove Pipe Top of Steel 13.58 7.85
32S/12E-24B01 North Beach Shallow Alluvium 7/14/2015 6.06 Stove Pipe Top of Steel 13.58 7.52
32S/12E-24B01 North Beach Shallow Alluvium 4/14/2015 6.22 Stove Pipe Top of Steel 13.58 7.36
32S/12E-24B01 North Beach Shallow Alluvium 1/13/2015 5.83 Stove Pipe Top of Steel 13.58 7.75
32S/12E-24B01 North Beach Shallow Alluvium 10/14/2014 5.76 Stove Pipe Top of Steel 13.58 7.82
32S/12E-24B01 North Beach Shallow Alluvium 7/29/2014 5.99 Stove Pipe Top of Steel 13.58 7.59
32S/12E-24B01 North Beach Shallow Alluvium 6/4/2014 6.52 Stove Pipe Top of Steel 13.58 7.06
32S/12E-24B01 North Beach Shallow Alluvium 4/15/2014 5.95 Stove Pipe Top of Steel 13.58 7.63
32S/12E-24B01 North Beach Shallow Alluvium 1/14/2014 5.75 Stove Pipe Top of Steel 13.58 7.83
32S/12E-24B01 North Beach Shallow Alluvium 10/14/2013 6.07 Stove Pipe Top of Steel 13.58 7.51
32S/12E-24B01 North Beach Shallow Alluvium 7/9/2013 6.09 Stove Pipe Top of Steel 13.58 7.49
32S/12E-24B01 North Beach Shallow Alluvium 4/10/2013 7.00 Stove Pipe Top of Steel 13.58 6.58
32S/12E-24B01 North Beach Shallow Alluvium 1/14/2013 5.72 Stove Pipe Top of Steel 13.58 7.86
32S/12E-24B01 North Beach Shallow Alluvium 10/29/2012 5.92 Stove Pipe Top of Steel 13.58 7.66
32S/12E-24B01 North Beach Shallow Alluvium 7/23/2012 5.79 Stove Pipe Top of Steel 13.58 7.79
32S/12E-24B01 North Beach Shallow Alluvium 4/18/2012 5.58 Stove Pipe Top of Steel 13.58 8.00
32S/12E-24B01 North Beach Shallow Alluvium 1/11/2012 5.72 Stove Pipe Top of Steel 13.58 7.86
32S/12E-24B01 North Beach Shallow Alluvium 11/21/2011 5.80 Stove Pipe Top of Steel 13.58 7.78
32S/12E-24B01 North Beach Shallow Alluvium 7/26/2011 6.38 Stove Pipe Top of Steel 13.58 7.20
32S/12E-24B01 North Beach Shallow Alluvium 4/20/2011 6.40 Stove Pipe Top of Steel 13.58 7.18
32S/12E-24B01 North Beach Shallow Alluvium 1/24/2011 5.78 Stove Pipe Top of Steel 13.58 7.80
32S/12E-24B01 North Beach Shallow Alluvium 10/21/2010 6.37 Stove Pipe Top of Steel 13.58 7.21
32S/12E-24B01 North Beach Shallow Alluvium 7/27/2010 6.48 Stove Pipe Top of Steel 13.58 7.1
32S/12E-24B01 North Beach Shallow Alluvium 4/27/2010 3.84 Flush Top Flush Mount 10.70 6.86
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Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B01 North Beach Shallow Alluvium 1/27/2010 3.13 Flush Top Flush Mount 10.70 7.57
32S/12E-24B01 North Beach Shallow Alluvium 10/19/2009 2.28 Flush Top Flush Mount 10.70 8.42
32S/12E-24B01 North Beach Shallow Alluvium 8/20/2009 3.25 Flush Top Flush Mount 10.70 7.45
32S/12E-24B01 North Beach Shallow Alluvium 5/12/2009 3.58 Flush Top Flush Mount 10.70 7.12
32S/12E-24B01 North Beach Shallow Alluvium 4/7/2009 1.61 Flush Top Flush Mount 10.70 9.09
32S/12E-24B01 North Beach Shallow Alluvium 10/15/2008 4.72 Flush Top Flush Mount 10.70 5.98
32S/12E-24B01 North Beach Shallow Alluvium 4/15/2008 2.65 Flush Top Flush Mount 10.70 8.05
32S/12E-24B01 North Beach Shallow Alluvium 10/18/2007 5.15 Flush Top Flush Mount 10.70 5.55
32S/12E-24B01 North Beach Shallow Alluvium 10/19/2006 0.75 Flush Top Flush Mount 10.70 9.95
32S/12E-24B01 North Beach Shallow Alluvium 4/25/2006 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 10/7/2005 4.30 Flush Top Flush Mount 10.70 6.40
32S/12E-24B01 North Beach Shallow Alluvium 4/29/2005 2.65 Flush Top Flush Mount 10.70 8.05
32S/12E-24B01 North Beach Shallow Alluvium 10/29/2004 4.70 Flush Top Flush Mount 10.70 6.00
32S/12E-24B01 North Beach Shallow Alluvium 4/8/2004 0.80 Flush Top Flush Mount 10.70 9.90
32S/12E-24B01 North Beach Shallow Alluvium 10/8/2003 1.20 Flush Top Flush Mount 10.70 9.50
32S/12E-24B01 North Beach Shallow Alluvium 10/14/2002 3.60 Flush Top Flush Mount 10.70 7.10
32S/12E-24B01 North Beach Shallow Alluvium 4/9/2002 0.80 Flush Top Flush Mount 10.70 9.90
32S/12E-24B01 North Beach Shallow Alluvium 10/5/2001 2.70 Flush Top Flush Mount 10.70 8.00
32S/12E-24B01 North Beach Shallow Alluvium 4/23/2001 2.20 Flush Top Flush Mount 10.70 8.50
32S/12E-24B01 North Beach Shallow Alluvium 4/24/2000 3.50 Flush Top Flush Mount 10.70 7.20
32S/12E-24B01 North Beach Shallow Alluvium 10/29/1999 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B01 North Beach Shallow Alluvium 4/15/1999 1.78 Flush Top Flush Mount 10.70 8.92
32S/12E-24B01 North Beach Shallow Alluvium 10/20/1998 2.20 Flush Top Flush Mount 10.70 8.50
32S/12E-24B01 North Beach Shallow Alluvium 4/23/1998 1.00 Flush Top Flush Mount 10.70 9.70
32S/12E-24B01 North Beach Shallow Alluvium 10/22/1997 3.16 Flush Top Flush Mount 10.70 7.54
32S/12E-24B01 North Beach Shallow Alluvium 4/29/1997 3.13 Flush Top Flush Mount 10.70 7.57
32S/12E-24B01 North Beach Shallow Alluvium 10/23/1996 4.50 Flush Top Flush Mount 10.70 6.20
32S/12E-24B01 North Beach Shallow Alluvium 4/29/1996 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B01 North Beach Shallow Alluvium 10/10/1995 3.30 Flush Top Flush Mount 10.70 7.40
32S/12E-24B01 North Beach Shallow Alluvium 4/19/1995 1.89 Flush Top Flush Mount 10.70 8.81
32S/12E-24B01 North Beach Shallow Alluvium 11/1/1994 4.70 Flush Top Flush Mount 10.70 6.00
32S/12E-24B01 North Beach Shallow Alluvium 4/11/1994 3.96 Flush Top Flush Mount 10.70 6.74
32S/12E-24B01 North Beach Shallow Alluvium 10/13/1993 3.95 Flush Top Flush Mount 10.70 6.75
32S/12E-24B01 North Beach Shallow Alluvium 4/8/1993 2.89 Flush Top Flush Mount 10.70 7.81
32S/12E-24B01 North Beach Shallow Alluvium 11/4/1992 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B01 North Beach Shallow Alluvium 4/21/1992 3.90 Flush Top Flush Mount 10.70 6.80
32S/12E-24B01 North Beach Shallow Alluvium 10/11/1991 4.51 Flush Top Flush Mount 10.70 6.19
32S/12E-24B01 North Beach Shallow Alluvium 4/19/1991 4.35 Flush Top Flush Mount 10.70 6.35
32S/12E-24B01 North Beach Shallow Alluvium 10/11/1990 4.34 Flush Top Flush Mount 10.70 6.36
32S/12E-24B01 North Beach Shallow Alluvium 4/24/1990 4.54 Flush Top Flush Mount 10.70 6.16
32S/12E-24B01 North Beach Shallow Alluvium 10/4/1989 3.51 Flush Top Flush Mount 10.70 7.19
32S/12E-24B01 North Beach Shallow Alluvium 4/17/1989 4.31 Flush Top Flush Mount 10.70 6.39
32S/12E-24B01 North Beach Shallow Alluvium 10/20/1988 4.40 Flush Top Flush Mount 10.70 6.30
32S/12E-24B01 North Beach Shallow Alluvium 4/29/1988 4.26 Flush Top Flush Mount 10.70 6.44
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Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B01 North Beach Shallow Alluvium 4/21/1988 4.34 Flush Top Flush Mount 10.70 6.36
32S/12E-24B01 North Beach Shallow Alluvium 10/19/1987 4.45 Flush Top Flush Mount 10.70 6.25
32S/12E-24B01 North Beach Shallow Alluvium 4/13/1987 3.18 Flush Top Flush Mount 10.70 7.52
32S/12E-24B01 North Beach Shallow Alluvium 10/31/1986 3.88 Flush Top Flush Mount 10.70 6.82
32S/12E-24B01 North Beach Shallow Alluvium 4/27/1986 4.18 Flush Top Flush Mount 10.70 6.52
32S/12E-24B01 North Beach Shallow Alluvium 10/18/1985 3.41 Flush Top Flush Mount 10.70 7.29
32S/12E-24B01 North Beach Shallow Alluvium 4/22/1985 2.10 Flush Top Flush Mount 10.70 8.60
32S/12E-24B01 North Beach Shallow Alluvium 10/29/1984 2.12 Flush Top Flush Mount 10.70 8.58
32S/12E-24B01 North Beach Shallow Alluvium 10/28/1983 1.92 Flush Top Flush Mount 10.70 8.78
32S/12E-24B01 North Beach Shallow Alluvium 5/6/1982 2.15 Flush Top Flush Mount 10.70 8.55
32S/12E-24B01 North Beach Shallow Alluvium 10/19/1981 2.08 Flush Top Flush Mount 10.70 8.62
32S/12E-24B01 North Beach Shallow Alluvium 4/21/1981 2.06 Flush Top Flush Mount 10.70 8.64
32S/12E-24B01 North Beach Shallow Alluvium 10/21/1980 2.59 Flush Top Flush Mount 10.70 8.11
32S/12E-24B01 North Beach Shallow Alluvium 5/9/1980 2.08 Flush Top Flush Mount 10.70 8.62
32S/12E-24B01 North Beach Shallow Alluvium 11/7/1979 2.60 Flush Top Flush Mount 10.70 8.10
32S/12E-24B01 North Beach Shallow Alluvium 4/17/1979 2.13 Flush Top Flush Mount 10.70 8.57
32S/12E-24B01 North Beach Shallow Alluvium 5/17/1977 2.39 Flush Top Flush Mount 10.70 8.31
32S/12E-24B01 North Beach Shallow Alluvium 6/9/1976 14.00 Flush Top Flush Mount 10.70 -3.30
32S/12E-24B01 North Beach Shallow Alluvium 5/21/1976 4.00 Flush Top Flush Mount 10.70 6.70
32S/12E-24B01 North Beach Shallow Alluvium 1/14/1976 2.00 Flush Top Flush Mount 10.70 8.70
32S/12E-24B01 North Beach Shallow Alluvium 7/7/1975 2.00 Flush Top Flush Mount 10.70 8.70
32S/12E-24B01 North Beach Shallow Alluvium 4/1/1975 2.08 Flush Top Flush Mount 10.70 8.62
32S/12E-24B01 North Beach Shallow Alluvium 6/7/1974 1.00 Flush Top Flush Mount 10.70 9.70
32S/12E-24B01 North Beach Shallow Alluvium 4/1/1974 2.00 Flush Top Flush Mount 10.70 8.70
32S/12E-24B01 North Beach Shallow Alluvium 9/20/1973 2.16 Flush Top Flush Mount 10.70 8.54
32S/12E-24B01 North Beach Shallow Alluvium 6/29/1972 2.57 Flush Top Flush Mount 10.70 8.13
32S/12E-24B01 North Beach Shallow Alluvium 2/29/1972 1.00 Flush Top Flush Mount 10.70 9.70
32S/12E-24B01 North Beach Shallow Alluvium 2/21/1972 1.45 Flush Top Flush Mount 10.70 9.25
32S/12E-24B01 North Beach Shallow Alluvium 11/29/1971 2.36 Flush Top Flush Mount 10.70 8.34
32S/12E-24B01 North Beach Shallow Alluvium 8/28/1971 2.25 Flush Top Flush Mount 10.70 8.45
32S/12E-24B01 North Beach Shallow Alluvium 6/2/1971 2.59 Flush Top Flush Mount 10.70 8.11
32S/12E-24B01 North Beach Shallow Alluvium 3/2/1971 1.81 Flush Top Flush Mount 10.70 8.89
32S/12E-24B01 North Beach Shallow Alluvium 12/15/1970 2.42 Flush Top Flush Mount 10.70 8.28
32S/12E-24B01 North Beach Shallow Alluvium 8/4/1970 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 6/3/1970 2.30 Flush Top Flush Mount 10.70 8.40
32S/12E-24B01 North Beach Shallow Alluvium 3/27/1970 2.16 Flush Top Flush Mount 10.70 8.54
32S/12E-24B01 North Beach Shallow Alluvium 1/29/1970 2.23 Flush Top Flush Mount 10.70 8.47
32S/12E-24B01 North Beach Shallow Alluvium 10/3/1969 2.55 Flush Top Flush Mount 10.70 8.15
32S/12E-24B01 North Beach Shallow Alluvium 7/23/1969 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 6/24/1969 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 5/22/1969 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 4/18/1969 2.13 Flush Top Flush Mount 10.70 8.57
32S/12E-24B01 North Beach Shallow Alluvium 1/15/1969 2.71 Flush Top Flush Mount 10.70 7.99
32S/12E-24B01 North Beach Shallow Alluvium 12/12/1968 2.81 Flush Top Flush Mount 10.70 7.89
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 121
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B01 North Beach Shallow Alluvium 11/14/1968 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B01 North Beach Shallow Alluvium 10/17/1968 3.47 Flush Top Flush Mount 10.70 7.23
32S/12E-24B01 North Beach Shallow Alluvium 9/14/1968 3.64 Flush Top Flush Mount 10.70 7.06
32S/12E-24B01 North Beach Shallow Alluvium 8/13/1968 3.23 Flush Top Flush Mount 10.70 7.47
32S/12E-24B01 North Beach Shallow Alluvium 7/22/1968 3.68 Flush Top Flush Mount 10.70 7.02
32S/12E-24B01 North Beach Shallow Alluvium 6/24/1968 3.70 Flush Top Flush Mount 10.70 7.00
32S/12E-24B01 North Beach Shallow Alluvium 5/30/1968 3.69 Flush Top Flush Mount 10.70 7.01
32S/12E-24B01 North Beach Shallow Alluvium 4/20/1968 2.84 Flush Top Flush Mount 10.70 7.86
32S/12E-24B01 North Beach Shallow Alluvium 3/21/1968 2.99 Flush Top Flush Mount 10.70 7.71
32S/12E-24B01 North Beach Shallow Alluvium 2/22/1968 2.67 Flush Top Flush Mount 10.70 8.03
32S/12E-24B01 North Beach Shallow Alluvium 1/16/1968 2.34 Flush Top Flush Mount 10.70 8.36
32S/12E-24B01 North Beach Shallow Alluvium 12/8/1967 2.66 Flush Top Flush Mount 10.70 8.04
32S/12E-24B01 North Beach Shallow Alluvium 11/13/1967 2.99 Flush Top Flush Mount 10.70 7.71
32S/12E-24B01 North Beach Shallow Alluvium 10/11/1967 3.86 Flush Top Flush Mount 10.70 6.84
32S/12E-24B01 North Beach Shallow Alluvium 9/5/1967 3.35 Flush Top Flush Mount 10.70 7.35
32S/12E-24B01 North Beach Shallow Alluvium 8/8/1967 3.57 Flush Top Flush Mount 10.70 7.13
32S/12E-24B01 North Beach Shallow Alluvium 7/12/1967 3.69 Flush Top Flush Mount 10.70 7.01
32S/12E-24B01 North Beach Shallow Alluvium 6/1/1967 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B01 North Beach Shallow Alluvium 5/2/1967 3.10 Flush Top Flush Mount 10.70 7.60
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 122
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B02 North Beach Middle Paso Robles 10/7/2020 6.64 Stove Pipe Top of Steel 13.58 6.94
32S/12E-24B02 North Beach Middle Paso Robles 7/6/2020 6.35 Stove Pipe Top of Steel 13.58 7.23
32S/12E-24B02 North Beach Middle Paso Robles 4/7/2020 5.54 Stove Pipe Top of Steel 13.58 8.04
32S/12E-24B02 North Beach Middle Paso Robles 1/7/2020 5.93 Stove Pipe Top of Steel 13.58 7.65
32S/12E-24B02 North Beach Middle Paso Robles 10/9/2019 6.52 Stove Pipe Top of Steel 13.58 7.06
32S/12E-24B02 North Beach Middle Paso Robles 7/9/2019 6.40 Stove Pipe Top of Steel 13.58 7.18
32S/12E-24B02 North Beach Middle Paso Robles 4/9/2019 6.50 Stove Pipe Top of Steel 13.58 7.08
32S/12E-24B02 North Beach Middle Paso Robles 1/8/2019 6.00 Stove Pipe Top of Steel 13.58 7.58
32S/12E-24B02 North Beach Middle Paso Robles 10/9/2018 6.65 Stove Pipe Top of Steel 13.58 6.93
32S/12E-24B02 North Beach Middle Paso Robles 7/10/2018 7.17 Stove Pipe Top of Steel 13.58 6.41
32S/12E-24B02 North Beach Middle Paso Robles 4/10/2018 6.02 Stove Pipe Top of Steel 13.58 7.56
32S/12E-24B02 North Beach Middle Paso Robles 1/10/2018 5.57 Stove Pipe Top of Steel 13.58 8.01
32S/12E-24B02 North Beach Middle Paso Robles 10/10/2017 6.46 Stove Pipe Top of Steel 13.58 7.12
32S/12E-24B02 North Beach Middle Paso Robles 7/11/2017 6.93 Stove Pipe Top of Steel 13.58 6.65
32S/12E-24B02 North Beach Middle Paso Robles 4/11/2017 6.26 Stove Pipe Top of Steel 13.58 7.32
32S/12E-24B02 North Beach Middle Paso Robles 1/10/2017 5.33 Stove Pipe Top of Steel 13.58 8.25
32S/12E-24B02 North Beach Middle Paso Robles 10/12/2016 7.05 Stove Pipe Top of Steel 13.58 6.53
32S/12E-24B02 North Beach Middle Paso Robles 7/19/2016 7.61 Stove Pipe Top of Steel 13.58 5.97
32S/12E-24B02 North Beach Middle Paso Robles 4/12/2016 6.37 Stove Pipe Top of Steel 13.58 7.21
32S/12E-24B02 North Beach Middle Paso Robles 1/12/2016 5.51 Stove Pipe Top of Steel 13.58 8.07
32S/12E-24B02 North Beach Middle Paso Robles 10/13/2015 6.61 Stove Pipe Top of Steel 13.58 6.97
32S/12E-24B02 North Beach Middle Paso Robles 7/14/2015 6.97 Stove Pipe Top of Steel 13.58 6.61
32S/12E-24B02 North Beach Middle Paso Robles 4/14/2015 7.13 Stove Pipe Top of Steel 13.58 6.45
32S/12E-24B02 North Beach Middle Paso Robles 1/13/2015 6.28 Stove Pipe Top of Steel 13.58 7.30
32S/12E-24B02 North Beach Middle Paso Robles 10/14/2014 6.61 Stove Pipe Top of Steel 13.58 6.97
32S/12E-24B02 North Beach Middle Paso Robles 7/29/2014 7.05 Stove Pipe Top of Steel 13.58 6.53
32S/12E-24B02 North Beach Middle Paso Robles 6/4/2014 8.25 Stove Pipe Top of Steel 13.58 5.33
32S/12E-24B02 North Beach Middle Paso Robles 4/15/2014 6.55 Stove Pipe Top of Steel 13.58 7.03
32S/12E-24B02 North Beach Middle Paso Robles 1/14/2014 6.34 Stove Pipe Top of Steel 13.58 7.24
32S/12E-24B02 North Beach Middle Paso Robles 10/14/2013 7.08 Stove Pipe Top of Steel 13.58 6.50
32S/12E-24B02 North Beach Middle Paso Robles 7/9/2013 7.17 Stove Pipe Top of Steel 13.58 6.41
32S/12E-24B02 North Beach Middle Paso Robles 4/10/2013 6.33 Stove Pipe Top of Steel 13.58 7.25
32S/12E-24B02 North Beach Middle Paso Robles 1/14/2013 5.61 Stove Pipe Top of Steel 13.58 7.97
32S/12E-24B02 North Beach Middle Paso Robles 10/29/2012 5.88 Stove Pipe Top of Steel 13.58 7.7
32S/12E-24B02 North Beach Middle Paso Robles 7/23/2012 6.12 Stove Pipe Top of Steel 13.58 7.46
32S/12E-24B02 North Beach Middle Paso Robles 4/18/2012 5.48 Stove Pipe Top of Steel 13.58 8.1
32S/12E-24B02 North Beach Middle Paso Robles 1/11/2012 5.47 Stove Pipe Top of Steel 13.58 8.11
32S/12E-24B02 North Beach Middle Paso Robles 11/21/2011 5.69 Stove Pipe Top of Steel 13.58 7.89
32S/12E-24B02 North Beach Middle Paso Robles 7/26/2011 6.51 Stove Pipe Top of Steel 13.58 7.07
32S/12E-24B02 North Beach Middle Paso Robles 4/20/2011 6.30 Stove Pipe Top of Steel 13.58 7.28
32S/12E-24B02 North Beach Middle Paso Robles 1/24/2011 5.69 Stove Pipe Top of Steel 13.58 7.89
32S/12E-24B02 North Beach Middle Paso Robles 10/21/2010 6.79 Stove Pipe Top of Steel 13.58 6.79
32S/12E-24B02 North Beach Middle Paso Robles 7/27/2010 7.05 Stove Pipe Top of Steel 13.58 6.53
32S/12E-24B02 North Beach Middle Paso Robles 4/27/2010 4.34 Flush Top Flush Mount 10.70 6.36
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 123
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B02 North Beach Middle Paso Robles 1/27/2010 3.38 Flush Top Flush Mount 10.70 7.32
32S/12E-24B02 North Beach Middle Paso Robles 10/19/2009 2.26 Flush Top Flush Mount 10.70 8.44
32S/12E-24B02 North Beach Middle Paso Robles 8/20/2009 4.09 Flush Top Flush Mount 10.70 6.61
32S/12E-24B02 North Beach Middle Paso Robles 5/12/2009 4.74 Flush Top Flush Mount 10.70 5.96
32S/12E-24B02 North Beach Middle Paso Robles 10/15/2008 4.54 Flush Top Flush Mount 10.70 6.16
32S/12E-24B02 North Beach Middle Paso Robles 4/15/2008 3.17 Flush Top Flush Mount 10.70 7.53
32S/12E-24B02 North Beach Middle Paso Robles 10/18/2007 3.75 Flush Top Flush Mount 10.70 6.95
32S/12E-24B02 North Beach Middle Paso Robles 4/17/2007 3.34 Flush Top Flush Mount 10.70 7.36
32S/12E-24B02 North Beach Middle Paso Robles 10/19/2006 3.40 Flush Top Flush Mount 10.70 7.30
32S/12E-24B02 North Beach Middle Paso Robles 4/25/2006 2.65 Flush Top Flush Mount 10.70 8.05
32S/12E-24B02 North Beach Middle Paso Robles 10/7/2005 3.10 Flush Top Flush Mount 10.70 7.60
32S/12E-24B02 North Beach Middle Paso Robles 4/28/2005 0.92 Flush Top Flush Mount 10.70 9.78
32S/12E-24B02 North Beach Middle Paso Robles 10/29/2004 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 4/8/2004 3.50 Flush Top Flush Mount 10.70 7.20
32S/12E-24B02 North Beach Middle Paso Robles 10/14/2002 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 4/9/2002 3.30 Flush Top Flush Mount 10.70 7.40
32S/12E-24B02 North Beach Middle Paso Robles 10/5/2001 2.40 Flush Top Flush Mount 10.70 8.30
32S/12E-24B02 North Beach Middle Paso Robles 4/23/2001 2.80 Flush Top Flush Mount 10.70 7.90
32S/12E-24B02 North Beach Middle Paso Robles 4/24/2000 3.40 Flush Top Flush Mount 10.70 7.30
32S/12E-24B02 North Beach Middle Paso Robles 10/29/1999 2.90 Flush Top Flush Mount 10.70 7.80
32S/12E-24B02 North Beach Middle Paso Robles 4/15/1999 2.30 Flush Top Flush Mount 10.70 8.40
32S/12E-24B02 North Beach Middle Paso Robles 10/20/1998 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B02 North Beach Middle Paso Robles 4/23/1998 2.30 Flush Top Flush Mount 10.70 8.40
32S/12E-24B02 North Beach Middle Paso Robles 10/22/1997 2.70 Flush Top Flush Mount 10.70 8.00
32S/12E-24B02 North Beach Middle Paso Robles 4/29/1997 3.59 Flush Top Flush Mount 10.70 7.11
32S/12E-24B02 North Beach Middle Paso Robles 10/23/1996 3.68 Flush Top Flush Mount 10.70 7.02
32S/12E-24B02 North Beach Middle Paso Robles 4/29/1996 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B02 North Beach Middle Paso Robles 10/10/1995 3.80 Flush Top Flush Mount 10.70 6.90
32S/12E-24B02 North Beach Middle Paso Robles 4/19/1995 3.39 Flush Top Flush Mount 10.70 7.31
32S/12E-24B02 North Beach Middle Paso Robles 11/1/1994 3.88 Flush Top Flush Mount 10.70 6.82
32S/12E-24B02 North Beach Middle Paso Robles 4/11/1994 3.54 Flush Top Flush Mount 10.70 7.16
32S/12E-24B02 North Beach Middle Paso Robles 10/13/1993 3.49 Flush Top Flush Mount 10.70 7.21
32S/12E-24B02 North Beach Middle Paso Robles 4/8/1993 3.23 Flush Top Flush Mount 10.70 7.47
32S/12E-24B02 North Beach Middle Paso Robles 11/4/1992 4.60 Flush Top Flush Mount 10.70 6.10
32S/12E-24B02 North Beach Middle Paso Robles 4/21/1992 4.35 Flush Top Flush Mount 10.70 6.35
32S/12E-24B02 North Beach Middle Paso Robles 10/11/1991 4.86 Flush Top Flush Mount 10.70 5.84
32S/12E-24B02 North Beach Middle Paso Robles 4/19/1991 4.22 Flush Top Flush Mount 10.70 6.48
32S/12E-24B02 North Beach Middle Paso Robles 10/11/1990 4.66 Flush Top Flush Mount 10.70 6.04
32S/12E-24B02 North Beach Middle Paso Robles 4/24/1990 4.54 Flush Top Flush Mount 10.70 6.16
32S/12E-24B02 North Beach Middle Paso Robles 10/4/1989 4.31 Flush Top Flush Mount 10.70 6.39
32S/12E-24B02 North Beach Middle Paso Robles 4/17/1989 4.13 Flush Top Flush Mount 10.70 6.57
32S/12E-24B02 North Beach Middle Paso Robles 10/20/1988 4.40 Flush Top Flush Mount 10.70 6.30
32S/12E-24B02 North Beach Middle Paso Robles 4/29/1988 3.86 Flush Top Flush Mount 10.70 6.84
32S/12E-24B02 North Beach Middle Paso Robles 4/21/1988 3.93 Flush Top Flush Mount 10.70 6.77
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 124
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B02 North Beach Middle Paso Robles 10/19/1987 3.97 Flush Top Flush Mount 10.70 6.73
32S/12E-24B02 North Beach Middle Paso Robles 4/13/1987 2.68 Flush Top Flush Mount 10.70 8.02
32S/12E-24B02 North Beach Middle Paso Robles 10/31/1986 3.70 Flush Top Flush Mount 10.70 7.00
32S/12E-24B02 North Beach Middle Paso Robles 4/27/1986 3.65 Flush Top Flush Mount 10.70 7.05
32S/12E-24B02 North Beach Middle Paso Robles 10/18/1985 3.50 Flush Top Flush Mount 10.70 7.20
32S/12E-24B02 North Beach Middle Paso Robles 4/22/1985 3.30 Flush Top Flush Mount 10.70 7.40
32S/12E-24B02 North Beach Middle Paso Robles 10/29/1984 3.26 Flush Top Flush Mount 10.70 7.44
32S/12E-24B02 North Beach Middle Paso Robles 10/28/1983 2.68 Flush Top Flush Mount 10.70 8.02
32S/12E-24B02 North Beach Middle Paso Robles 5/6/1982 3.05 Flush Top Flush Mount 10.70 7.65
32S/12E-24B02 North Beach Middle Paso Robles 10/19/1981 3.51 Flush Top Flush Mount 10.70 7.19
32S/12E-24B02 North Beach Middle Paso Robles 4/21/1981 3.04 Flush Top Flush Mount 10.70 7.66
32S/12E-24B02 North Beach Middle Paso Robles 10/21/1980 3.50 Flush Top Flush Mount 10.70 7.20
32S/12E-24B02 North Beach Middle Paso Robles 5/9/1980 3.51 Flush Top Flush Mount 10.70 7.19
32S/12E-24B02 North Beach Middle Paso Robles 11/7/1979 2.72 Flush Top Flush Mount 10.70 7.98
32S/12E-24B02 North Beach Middle Paso Robles 4/17/1979 2.90 Flush Top Flush Mount 10.70 7.80
32S/12E-24B02 North Beach Middle Paso Robles 12/4/1978 2.55 Flush Top Flush Mount 10.70 8.15
32S/12E-24B02 North Beach Middle Paso Robles 5/4/1978 2.00 Flush Top Flush Mount 10.70 8.70
32S/12E-24B02 North Beach Middle Paso Robles 11/7/1977 3.45 Flush Top Flush Mount 10.70 7.25
32S/12E-24B02 North Beach Middle Paso Robles 5/17/1977 3.52 Flush Top Flush Mount 10.70 7.18
32S/12E-24B02 North Beach Middle Paso Robles 6/9/1976 9.89 Flush Top Flush Mount 10.70 0.81
32S/12E-24B02 North Beach Middle Paso Robles 1/14/1976 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 7/7/1975 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 4/17/1975 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 6/7/1974 2.00 Flush Top Flush Mount 10.70 8.70
32S/12E-24B02 North Beach Middle Paso Robles 9/20/1973 3.32 Flush Top Flush Mount 10.70 7.38
32S/12E-24B02 North Beach Middle Paso Robles 6/29/1972 3.05 Flush Top Flush Mount 10.70 7.65
32S/12E-24B02 North Beach Middle Paso Robles 3/2/1972 2.80 Flush Top Flush Mount 10.70 7.90
32S/12E-24B02 North Beach Middle Paso Robles 2/29/1972 2.62 Flush Top Flush Mount 10.70 8.08
32S/12E-24B02 North Beach Middle Paso Robles 11/29/1971 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 8/25/1971 3.40 Flush Top Flush Mount 10.70 7.30
32S/12E-24B02 North Beach Middle Paso Robles 6/2/1971 3.10 Flush Top Flush Mount 10.70 7.60
32S/12E-24B02 North Beach Middle Paso Robles 12/15/1970 2.65 Flush Top Flush Mount 10.70 8.05
32S/12E-24B02 North Beach Middle Paso Robles 8/4/1970 3.19 Flush Top Flush Mount 10.70 7.51
32S/12E-24B02 North Beach Middle Paso Robles 6/3/1970 3.17 Flush Top Flush Mount 10.70 7.53
32S/12E-24B02 North Beach Middle Paso Robles 3/27/1970 2.70 Flush Top Flush Mount 10.70 8.00
32S/12E-24B02 North Beach Middle Paso Robles 1/29/1970 2.62 Flush Top Flush Mount 10.70 8.08
32S/12E-24B02 North Beach Middle Paso Robles 10/3/1969 3.33 Flush Top Flush Mount 10.70 7.37
32S/12E-24B02 North Beach Middle Paso Robles 7/23/1969 4.00 Flush Top Flush Mount 10.70 6.70
32S/12E-24B02 North Beach Middle Paso Robles 6/24/1969 4.00 Flush Top Flush Mount 10.70 6.70
32S/12E-24B02 North Beach Middle Paso Robles 5/22/1969 4.00 Flush Top Flush Mount 10.70 6.70
32S/12E-24B02 North Beach Middle Paso Robles 4/18/1969 2.58 Flush Top Flush Mount 10.70 8.12
32S/12E-24B02 North Beach Middle Paso Robles 1/15/1969 2.55 Flush Top Flush Mount 10.70 8.15
32S/12E-24B02 North Beach Middle Paso Robles 12/12/1968 3.00 Flush Top Flush Mount 10.70 7.70
32S/12E-24B02 North Beach Middle Paso Robles 11/14/1968 2.89 Flush Top Flush Mount 10.70 1.97
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 125
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B02 North Beach Middle Paso Robles 10/17/1968 3.26 Flush Top Flush Mount 10.70 7.44
32S/12E-24B02 North Beach Middle Paso Robles 9/14/1968 4.25 Flush Top Flush Mount 10.70 6.45
32S/12E-24B02 North Beach Middle Paso Robles 8/13/1968 3.52 Flush Top Flush Mount 10.70 7.18
32S/12E-24B02 North Beach Middle Paso Robles 7/22/1968 3.65 Flush Top Flush Mount 10.70 7.05
32S/12E-24B02 North Beach Middle Paso Robles 6/24/1968 3.50 Flush Top Flush Mount 10.70 7.20
32S/12E-24B02 North Beach Middle Paso Robles 5/30/1968 4.65 Flush Top Flush Mount 10.70 6.05
32S/12E-24B02 North Beach Middle Paso Robles 4/20/1968 3.05 Flush Top Flush Mount 10.70 7.65
32S/12E-24B02 North Beach Middle Paso Robles 3/21/1968 2.51 Flush Top Flush Mount 10.70 8.19
32S/12E-24B02 North Beach Middle Paso Robles 2/22/1968 2.32 Flush Top Flush Mount 10.70 8.38
32S/12E-24B02 North Beach Middle Paso Robles 1/17/1968 1.75 Flush Top Flush Mount 10.70 8.95
32S/12E-24B02 North Beach Middle Paso Robles 12/8/1967 2.45 Flush Top Flush Mount 10.70 8.25
32S/12E-24B02 North Beach Middle Paso Robles 11/13/1967 2.95 Flush Top Flush Mount 10.70 7.75
32S/12E-24B02 North Beach Middle Paso Robles 10/11/1967 3.70 Flush Top Flush Mount 10.70 7.00
32S/12E-24B02 North Beach Middle Paso Robles 9/5/1967 3.21 Flush Top Flush Mount 10.70 7.49
32S/12E-24B02 North Beach Middle Paso Robles 8/8/1967 3.34 Flush Top Flush Mount 10.70 7.36
32S/12E-24B02 North Beach Middle Paso Robles 7/12/1967 2.71 Flush Top Flush Mount 10.70 7.99
32S/12E-24B02 North Beach Middle Paso Robles 6/1/1967 2.20 Flush Top Flush Mount 10.70 8.50
32S/12E-24B02 North Beach Middle Paso Robles 5/2/1967 2.20 Flush Top Flush Mount 10.70 8.50
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 126
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B03 North Beach Deep Careaga 10/7/2020 4.16 Stove Pipe Top of Steel 13.58 9.42
32S/12E-24B03 North Beach Deep Careaga 7/6/2020 3.00 Stove Pipe Top of Steel 13.58 10.58
32S/12E-24B03 North Beach Deep Careaga 4/7/2020 2.22 Stove Pipe Top of Steel 13.58 11.36
32S/12E-24B03 North Beach Deep Careaga 1/7/2020 2.77 Stove Pipe Top of Steel 13.58 10.81
32S/12E-24B03 North Beach Deep Careaga 10/9/2019 3.36 Stove Pipe Top of Steel 13.58 10.22
32S/12E-24B03 North Beach Deep Careaga 7/9/2019 3.39 Stove Pipe Top of Steel 13.58 10.19
32S/12E-24B03 North Beach Deep Careaga 4/9/2019 3.08 Stove Pipe Top of Steel 13.58 10.50
32S/12E-24B03 North Beach Deep Careaga 1/8/2019 3.12 Stove Pipe Top of Steel 13.58 10.46
32S/12E-24B03 North Beach Deep Careaga 10/9/2018 3.80 Stove Pipe Top of Steel 13.58 9.78
32S/12E-24B03 North Beach Deep Careaga 7/10/2018 4.18 Stove Pipe Top of Steel 13.58 9.40
32S/12E-24B03 North Beach Deep Careaga 4/10/2018 2.55 Stove Pipe Top of Steel 13.58 11.03
32S/12E-24B03 North Beach Deep Careaga 1/10/2018 2.51 Stove Pipe Top of Steel 13.58 11.07
32S/12E-24B03 North Beach Deep Careaga 10/10/2017 3.60 Stove Pipe Top of Steel 13.58 9.98
32S/12E-24B03 North Beach Deep Careaga 7/11/2017 3.75 Stove Pipe Top of Steel 13.58 9.83
32S/12E-24B03 North Beach Deep Careaga 4/11/2017 2.90 Stove Pipe Top of Steel 13.58 10.68
32S/12E-24B03 North Beach Deep Careaga 1/10/2017 2.59 Stove Pipe Top of Steel 13.58 10.99
32S/12E-24B03 North Beach Deep Careaga 10/12/2016 4.70 Stove Pipe Top of Steel 13.58 8.88
32S/12E-24B03 North Beach Deep Careaga 7/19/2016 5.10 Stove Pipe Top of Steel 13.58 8.48
32S/12E-24B03 North Beach Deep Careaga 4/12/2016 3.81 Stove Pipe Top of Steel 13.58 9.77
32S/12E-24B03 North Beach Deep Careaga 1/12/2016 3.01 Stove Pipe Top of Steel 13.58 10.57
32S/12E-24B03 North Beach Deep Careaga 10/13/2015 4.62 Stove Pipe Top of Steel 13.58 8.96
32S/12E-24B03 North Beach Deep Careaga 7/14/2015 4.76 Stove Pipe Top of Steel 13.58 8.82
32S/12E-24B03 North Beach Deep Careaga 4/14/2015 4.86 Stove Pipe Top of Steel 13.58 8.72
32S/12E-24B03 North Beach Deep Careaga 1/13/2015 3.59 Stove Pipe Top of Steel 13.58 9.99
32S/12E-24B03 North Beach Deep Careaga 10/14/2014 4.60 Stove Pipe Top of Steel 13.58 8.98
32S/12E-24B03 North Beach Deep Careaga 7/29/2014 4.78 Stove Pipe Top of Steel 13.58 8.80
32S/12E-24B03 North Beach Deep Careaga 6/4/2014 7.33 Stove Pipe Top of Steel 13.58 6.25
32S/12E-24B03 North Beach Deep Careaga 5/5/2014 5.36 Stove Pipe Top of Steel 13.58 8.22
32S/12E-24B03 North Beach Deep Careaga 4/15/2014 3.94 Stove Pipe Top of Steel 13.58 9.64
32S/12E-24B03 North Beach Deep Careaga 1/14/2014 3.81 Stove Pipe Top of Steel 13.58 9.77
32S/12E-24B03 North Beach Deep Careaga 10/14/2013 4.50 Stove Pipe Top of Steel 13.58 9.08
32S/12E-24B03 North Beach Deep Careaga 7/9/2013 4.48 Stove Pipe Top of Steel 13.58 9.1
32S/12E-24B03 North Beach Deep Careaga 4/10/2013 3.41 Stove Pipe Top of Steel 13.58 10.17
32S/12E-24B03 North Beach Deep Careaga 1/14/2013 2.48 Stove Pipe Top of Steel 13.58 11.1
32S/12E-24B03 North Beach Deep Careaga 10/29/2012 3.01 Stove Pipe Top of Steel 13.58 10.57
32S/12E-24B03 North Beach Deep Careaga 7/23/2012 2.98 Stove Pipe Top of Steel 13.58 10.6
32S/12E-24B03 North Beach Deep Careaga 4/18/2012 1.93 Stove Pipe Top of Steel 13.58 11.65
32S/12E-24B03 North Beach Deep Careaga 1/12/2012 2.15 Stove Pipe Top of Steel 13.58 11.43
32S/12E-24B03 North Beach Deep Careaga 11/21/2011 2.93 Stove Pipe Top of Steel 13.58 10.65
32S/12E-24B03 North Beach Deep Careaga 7/26/2011 3.17 Stove Pipe Top of Steel 13.58 10.41
32S/12E-24B03 North Beach Deep Careaga 4/20/2011 3.25 Stove Pipe Top of Steel 13.58 10.33
32S/12E-24B03 North Beach Deep Careaga 1/24/2011 2.65 Stove Pipe Top of Steel 13.58 10.93
32S/12E-24B03 North Beach Deep Careaga 10/21/2010 4.60 Stove Pipe Top of Steel 13.58 8.98
32S/12E-24B03 North Beach Deep Careaga 7/27/2010 4.54 Stove Pipe Top of Steel 13.58 9.04
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 127
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B03 North Beach Deep Careaga 4/27/2010 1.43 Flush Top Flush Mount 10.70 9.27
32S/12E-24B03 North Beach Deep Careaga 1/27/2010 0.94 Flush Top Flush Mount 10.70 9.76
32S/12E-24B03 North Beach Deep Careaga 10/19/2009 0.81 Flush Top Flush Mount 10.70 9.89
32S/12E-24B03 North Beach Deep Careaga 8/19/2009 4.18 Flush Top Flush Mount 10.70 6.52
32S/12E-24B03 North Beach Deep Careaga 5/12/2009 3.18 Flush Top Flush Mount 10.70 7.52
32S/12E-24B03 North Beach Deep Careaga 10/15/2008 3.13 Flush Top Flush Mount 10.70 7.57
32S/12E-24B03 North Beach Deep Careaga 4/15/2008 3.80 Flush Top Flush Mount 10.70 6.90
32S/12E-24B03 North Beach Deep Careaga 10/18/2007 5.40 Flush Top Flush Mount 10.70 5.30
32S/12E-24B03 North Beach Deep Careaga 4/17/2007 3.80 Flush Top Flush Mount 10.70 6.90
32S/12E-24B03 North Beach Deep Careaga 10/19/2006 2.45 Flush Top Flush Mount 10.70 8.25
32S/12E-24B03 North Beach Deep Careaga 4/25/2006 0.15 Flush Top Flush Mount 10.70 10.55
32S/12E-24B03 North Beach Deep Careaga 10/7/2005 3.20 Flush Top Flush Mount 10.70 7.50
32S/12E-24B03 North Beach Deep Careaga 4/28/2005 3.15 Flush Top Flush Mount 10.70 7.55
32S/12E-24B03 North Beach Deep Careaga 10/27/2004 4.00 Flush Top Flush Mount 10.70 6.70
32S/12E-24B03 North Beach Deep Careaga 4/8/2004 0.90 Flush Top Flush Mount 10.70 9.80
32S/12E-24B03 North Beach Deep Careaga 10/14/2002 2.80 Flush Top Flush Mount 10.70 7.90
32S/12E-24B03 North Beach Deep Careaga 4/9/2002 2.90 Flush Top Flush Mount 10.70 7.80
32S/12E-24B03 North Beach Deep Careaga 10/5/2001 0.20 Flush Top Flush Mount 10.70 10.50
32S/12E-24B03 North Beach Deep Careaga 4/23/2001 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/24/2000 2.70 Flush Top Flush Mount 10.70 8.00
32S/12E-24B03 North Beach Deep Careaga 10/29/1999 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/15/1999 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/20/1998 1.80 Flush Top Flush Mount 10.70 8.90
32S/12E-24B03 North Beach Deep Careaga 10/29/1997 2.15 Flush Top Flush Mount 10.70 8.55
32S/12E-24B03 North Beach Deep Careaga 4/29/1997 2.68 Flush Top Flush Mount 10.70 8.02
32S/12E-24B03 North Beach Deep Careaga 10/23/1996 3.68 Flush Top Flush Mount 10.70 7.02
32S/12E-24B03 North Beach Deep Careaga 4/29/1996 1.60 Flush Top Flush Mount 10.70 9.10
32S/12E-24B03 North Beach Deep Careaga 10/10/1995 2.80 Flush Top Flush Mount 10.70 7.90
32S/12E-24B03 North Beach Deep Careaga 4/19/1995 0.50 Flush Top Flush Mount 10.70 10.20
32S/12E-24B03 North Beach Deep Careaga 11/1/1994 2.95 Flush Top Flush Mount 10.70 7.75
32S/12E-24B03 North Beach Deep Careaga 4/11/1994 1.31 Flush Top Flush Mount 10.70 9.39
32S/12E-24B03 North Beach Deep Careaga 10/13/1993 2.28 Flush Top Flush Mount 10.70 8.42
32S/12E-24B03 North Beach Deep Careaga 4/8/1993 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/4/1992 4.30 Flush Top Flush Mount 10.70 6.40
32S/12E-24B03 North Beach Deep Careaga 4/21/1992 1.70 Flush Top Flush Mount 10.70 9.00
32S/12E-24B03 North Beach Deep Careaga 10/11/1991 3.60 Flush Top Flush Mount 10.70 7.10
32S/12E-24B03 North Beach Deep Careaga 4/19/1991 2.74 Flush Top Flush Mount 10.70 7.96
32S/12E-24B03 North Beach Deep Careaga 10/11/1990 2.65 Flush Top Flush Mount 10.70 8.05
32S/12E-24B03 North Beach Deep Careaga 4/24/1990 2.39 Flush Top Flush Mount 10.70 8.31
32S/12E-24B03 North Beach Deep Careaga 10/4/1989 2.22 Flush Top Flush Mount 10.70 8.48
32S/12E-24B03 North Beach Deep Careaga 4/17/1989 2.73 Flush Top Flush Mount 10.70 7.97
32S/12E-24B03 North Beach Deep Careaga 10/20/1988 2.62 Flush Top Flush Mount 10.70 8.08
32S/12E-24B03 North Beach Deep Careaga 4/29/1988 2.26 Flush Top Flush Mount 10.70 8.44
32S/12E-24B03 North Beach Deep Careaga 10/19/1987 3.36 Flush Top Flush Mount 10.70 7.34
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 128
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B03 North Beach Deep Careaga 4/13/1987 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/31/1986 3.18 Flush Top Flush Mount 10.70 7.52
32S/12E-24B03 North Beach Deep Careaga 4/27/1986 3.07 Flush Top Flush Mount 10.70 7.63
32S/12E-24B03 North Beach Deep Careaga 10/18/1985 0.82 Flush Top Flush Mount 10.70 9.88
32S/12E-24B03 North Beach Deep Careaga 4/22/1985 0.40 Flush Top Flush Mount 10.70 10.30
32S/12E-24B03 North Beach Deep Careaga 10/29/1984 1.69 Flush Top Flush Mount 10.70 9.01
32S/12E-24B03 North Beach Deep Careaga 10/19/1981 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/21/1981 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/21/1980 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 5/9/1980 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/7/1979 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/17/1979 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 12/4/1978 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 5/4/1978 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/7/1977 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 5/17/1977 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/9/1976 1.90 Flush Top Flush Mount 10.70 8.80
32S/12E-24B03 North Beach Deep Careaga 5/21/1976 1.33 Flush Top Flush Mount 10.70 9.37
32S/12E-24B03 North Beach Deep Careaga 1/14/1976 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 7/7/1975 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/1/1975 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/7/1974 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 9/20/1973 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/29/1972 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 2/29/1972 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/29/1971 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 8/28/1971 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/2/1971 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 3/2/1971 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 12/15/1970 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 8/4/1970 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/3/1970 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 3/27/1970 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 1/29/1970 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/3/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 7/23/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/24/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 5/22/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 4/18/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 2/21/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 1/15/1969 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 12/12/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/14/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/17/1968 0.72 Flush Top Flush Mount 10.70 9.98
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 129
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/12E-24B03 North Beach Deep Careaga 9/14/1968 0.60 Flush Top Flush Mount 10.70 10.10
32S/12E-24B03 North Beach Deep Careaga 8/13/1968 0.28 Flush Top Flush Mount 10.70 10.42
32S/12E-24B03 North Beach Deep Careaga 7/22/1968 0.48 Flush Top Flush Mount 10.70 10.22
32S/12E-24B03 North Beach Deep Careaga 6/24/1968 0.32 Flush Top Flush Mount 10.70 10.38
32S/12E-24B03 North Beach Deep Careaga 5/30/1968 0.38 Flush Top Flush Mount 10.70 10.32
32S/12E-24B03 North Beach Deep Careaga 4/20/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 3/21/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 2/22/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 1/17/1968 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 12/8/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 11/13/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 10/11/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 9/5/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 8/8/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 7/12/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 6/1/1967 0.00 Flush Top Flush Mount 10.70 10.70
32S/12E-24B03 North Beach Deep Careaga 5/2/1967 0.00 Flush Top Flush Mount 10.70 10.70
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 130
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 10/7/2020 14.89 Stove Pipe Top of Steel 23.16 8.27
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 7/6/2020 13.98 Stove Pipe Top of Steel 23.16 9.18
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 4/7/2020 13.04 Stove Pipe Top of Steel 23.16 10.12
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 1/7/2020 13.80 Stove Pipe Top of Steel 23.16 9.36
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 10/9/2019 14.78 Stove Pipe Top of Steel 23.16 8.38
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 7/9/2019 13.60 Stove Pipe Top of Steel 23.16 9.56
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 4/9/2019 13.03 Stove Pipe Top of Steel 23.16 10.13
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 1/8/2019 14.54 Stove Pipe Top of Steel 23.16 8.62
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/9/2018 15.23 Stove Pipe Top of Steel 23.16 7.93
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/10/2018 14.81 Stove Pipe Top of Steel 23.16 8.35
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/10/2018 14.03 Stove Pipe Top of Steel 23.16 9.13
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/10/2018 14.40 Stove Pipe Top of Steel 23.16 8.76
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/10/2017 14.65 Stove Pipe Top of Steel 23.16 8.51
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/11/2017 13.73 Stove Pipe Top of Steel 23.16 9.43
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/11/2017 13.25 Stove Pipe Top of Steel 23.16 9.91
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/10/2017 13.99 Stove Pipe Top of Steel 23.16 9.17
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/12/2016 17.08 Stove Pipe Top of Steel 23.16 6.08
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/19/2016 16.42 Stove Pipe Top of Steel 23.16 6.74
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/12/2016 14.83 Stove Pipe Top of Steel 23.16 8.33
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/12/2016 15.00 Stove Pipe Top of Steel 23.16 8.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/13/2015 17.11 Stove Pipe Top of Steel 23.16 6.05
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/14/2015 16.93 Stove Pipe Top of Steel 23.16 6.23
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/14/2015 16.01 Stove Pipe Top of Steel 23.16 7.15
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/13/2015 15.41 Stove Pipe Top of Steel 23.16 7.75
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/14/2014 17.05 Stove Pipe Top of Steel 23.16 6.11
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/29/2014 17.11 Stove Pipe Top of Steel 23.16 6.05
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/4/2014 16.82 Stove Pipe Top of Steel 23.16 6.34
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/15/2014 15.56 Stove Pipe Top of Steel 23.16 7.60
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/14/2014 16.58 Stove Pipe Top of Steel 23.16 6.58
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/14/2013 17.07 Stove Pipe Top of Steel 23.16 6.09
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/9/2013 16.17 Stove Pipe Top of Steel 23.16 6.99
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/10/2013 14.58 Stove Pipe Top of Steel 23.16 8.58
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/14/2013 14.36 Stove Pipe Top of Steel 23.16 8.8
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/30/2012 14.95 Stove Pipe Top of Steel 23.16 8.21
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/24/2012 14.00 Stove Pipe Top of Steel 23.16 9.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/18/2012 13.42 Stove Pipe Top of Steel 23.16 9.74
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/10/2012 13.80 Stove Pipe Top of Steel 23.16 9.36
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/21/2011 13.78 Stove Pipe Top of Steel 23.16 9.38
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/26/2011 13.50 Stove Pipe Top of Steel 23.16 9.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/20/2011 12.82 Stove Pipe Top of Steel 23.16 10.34
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/24/2011 13.33 Stove Pipe Top of Steel 23.16 9.83
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/21/2010 16.55 Stove Pipe Top of Steel 23.16 6.61
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/26/2010 15.68 Stove Pipe Top of Steel 23.16 7.48
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/27/2010 11.02 Stove Pipe Top of Steel 23.16 12.14
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Item 11.a. - Page 131
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/28/2010 12.73 Stove Pipe Top of Steel 23.16 10.43
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/19/2009 14.33 Stove Pipe Top of Steel 23.16 8.83
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
8/19/2009 14.34 Stove Pipe Top of Steel 23.16 8.82
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/12/2009 12.38 Stove Pipe Top of Steel 23.16 10.78
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/7/2009 11.67 Stove Pipe Top of Steel 23.16 11.49
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/15/2008 15.53 Stove Pipe Top of Steel 23.16 7.63
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/19/2006 12.45 Stove Pipe Top of Steel 23.16 10.71
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/25/2006 11.55 Stove Pipe Top of Steel 23.16 11.61
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/7/2005 12.75 Stove Pipe Top of Steel 23.16 10.41
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/28/2005 10.25 Stove Pipe Top of Steel 23.16 12.91
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/27/2004 14.20 Stove Pipe Top of Steel 23.16 8.96
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/8/2004 10.90 Stove Pipe Top of Steel 23.16 12.26
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/8/2003 14.90 Stove Pipe Top of Steel 23.16 8.26
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/14/2002 14.20 Stove Pipe Top of Steel 23.16 8.96
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/9/2002 10.00 Stove Pipe Top of Steel 23.16 13.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/5/2001 11.50 Stove Pipe Top of Steel 23.16 11.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/23/2001 8.90 Stove Pipe Top of Steel 23.16 14.26
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/16/2000 11.60 Stove Pipe Top of Steel 23.16 11.56
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/24/2000 10.00 Stove Pipe Top of Steel 23.16 13.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/29/1999 11.50 Stove Pipe Top of Steel 23.16 11.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/15/1999 8.40 Stove Pipe Top of Steel 23.16 14.76
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/20/1998 10.70 Stove Pipe Top of Steel 23.16 12.46
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/23/1998 8.80 Stove Pipe Top of Steel 23.16 14.36
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/22/1997 12.07 Stove Pipe Top of Steel 23.16 11.09
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/29/1997 10.21 Stove Pipe Top of Steel 23.16 12.95
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/23/1996 11.70 Stove Pipe Top of Steel 23.16 11.46
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/29/1996 10.50 Stove Pipe Top of Steel 23.16 12.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/11/1995 11.70 Stove Pipe Top of Steel 23.16 11.46
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/19/1995 9.20 Stove Pipe Top of Steel 23.16 13.96
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/1/1994 12.50 Stove Pipe Top of Steel 23.16 10.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/11/1994 10.90 Stove Pipe Top of Steel 23.16 12.26
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/13/1993 11.86 Stove Pipe Top of Steel 23.16 11.30
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/8/1993 10.01 Stove Pipe Top of Steel 23.16 13.15
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/4/1992 12.50 Stove Pipe Top of Steel 23.16 10.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/21/1992 10.70 Stove Pipe Top of Steel 23.16 12.46
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/11/1991 13.37 Stove Pipe Top of Steel 23.16 9.79
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/19/1991 12.05 Stove Pipe Top of Steel 23.16 11.11
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/11/1990 14.90 Stove Pipe Top of Steel 23.16 8.26
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/24/1990 12.35 Stove Pipe Top of Steel 23.16 10.81
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/4/1989 13.52 Stove Pipe Top of Steel 23.16 9.64
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/17/1989 11.82 Stove Pipe Top of Steel 23.16 11.34
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/20/1988 13.36 Stove Pipe Top of Steel 23.16 9.80
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/29/1988 11.66 Stove Pipe Top of Steel 23.16 11.50
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/21/1988 11.73 Stove Pipe Top of Steel 23.16 11.43
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Item 11.a. - Page 132
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/19/1987 13.09 Stove Pipe Top of Steel 23.16 10.07
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/13/1987 11.31 Stove Pipe Top of Steel 23.16 11.85
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/31/1986 12.19 Stove Pipe Top of Steel 23.16 10.97
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/15/1986 11.05 Stove Pipe Top of Steel 23.16 12.11
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/18/1985 13.15 Stove Pipe Top of Steel 23.16 10.01
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/22/1985 11.10 Stove Pipe Top of Steel 23.16 12.06
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/15/1984 11.32 Stove Pipe Top of Steel 23.16 11.84
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/28/1983 10.05 Stove Pipe Top of Steel 23.16 13.11
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/6/1982 10.14 Stove Pipe Top of Steel 23.16 13.02
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/19/1981 11.43 Stove Pipe Top of Steel 23.16 11.73
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/21/1981 10.04 Stove Pipe Top of Steel 23.16 13.12
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/10/1980 11.40 Stove Pipe Top of Steel 23.16 11.76
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/9/1980 10.53 Stove Pipe Top of Steel 23.16 12.63
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/7/1979 11.21 Stove Pipe Top of Steel 23.16 11.95
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/17/1979 10.19 Stove Pipe Top of Steel 23.16 12.97
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
12/4/1978 10.41 Stove Pipe Top of Steel 23.16 12.75
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/24/1978 9.50 Stove Pipe Top of Steel 23.16 13.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/7/1977 12.97 Stove Pipe Top of Steel 23.16 10.19
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/17/1977 12.09 Stove Pipe Top of Steel 23.16 11.07
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/9/1976 12.25 Stove Pipe Top of Steel 23.16 10.91
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/14/1976 11.40 Stove Pipe Top of Steel 23.16 11.76
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/4/1976 11.00 Stove Pipe Top of Steel 23.16 12.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/7/1975 13.42 Stove Pipe Top of Steel 23.16 9.74
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/1/1975 10.00 Stove Pipe Top of Steel 23.16 13.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/7/1974 10.00 Stove Pipe Top of Steel 23.16 13.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/1/1974 10.50 Stove Pipe Top of Steel 23.16 12.66
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/20/1973 11.67 Stove Pipe Top of Steel 23.16 11.49
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/29/1972 16.00 Stove Pipe Top of Steel 23.16 7.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
2/23/1972 10.00 Stove Pipe Top of Steel 23.16 13.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/29/1971 11.10 Stove Pipe Top of Steel 23.16 12.06
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
8/26/1971 11.43 Stove Pipe Top of Steel 23.16 11.73
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/2/1971 10.94 Stove Pipe Top of Steel 23.16 12.22
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
3/2/1971 10.29 Stove Pipe Top of Steel 23.16 12.87
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
12/15/1970 10.56 Stove Pipe Top of Steel 23.16 12.60
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
8/4/1970 19.00 Stove Pipe Top of Steel 23.16 4.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/3/1970 14.00 Stove Pipe Top of Steel 23.16 9.16
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
3/27/1970 12.07 Stove Pipe Top of Steel 23.16 11.09
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/29/1970 11.80 Stove Pipe Top of Steel 23.16 11.36
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/3/1969 14.60 Stove Pipe Top of Steel 23.16 8.56
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/23/1969 13.75 Stove Pipe Top of Steel 23.16 9.41
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/24/1969 12.93 Stove Pipe Top of Steel 23.16 10.23
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/22/1969 12.16 Stove Pipe Top of Steel 23.16 11.00
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/18/1969 11.24 Stove Pipe Top of Steel 23.16 11.92
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
3/20/1969 10.33 Stove Pipe Top of Steel 23.16 12.83
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Item 11.a. - Page 133
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
2/21/1969 11.63 Stove Pipe Top of Steel 23.16 11.53
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/15/1969 13.60 Stove Pipe Top of Steel 23.16 9.56
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
12/12/1968 15.07 Stove Pipe Top of Steel 23.16 8.09
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/14/1968 16.28 Stove Pipe Top of Steel 23.16 6.88
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/17/1968 17.37 Stove Pipe Top of Steel 23.16 5.79
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
9/14/1968 18.80 Stove Pipe Top of Steel 23.16 4.36
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
8/13/1968 17.96 Stove Pipe Top of Steel 23.16 5.20
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/22/1968 17.70 Stove Pipe Top of Steel 23.16 5.46
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/24/1968 16.95 Stove Pipe Top of Steel 23.16 6.21
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/30/1968 5.47 Stove Pipe Top of Steel 23.16 17.69
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
4/20/1968 13.51 Stove Pipe Top of Steel 23.16 9.65
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
3/21/1968 12.10 Stove Pipe Top of Steel 23.16 11.06
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
2/22/1968 12.29 Stove Pipe Top of Steel 23.16 10.87
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
1/17/1968 12.67 Stove Pipe Top of Steel 23.16 10.49
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
12/8/1967 13.37 Stove Pipe Top of Steel 23.16 9.79
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
11/13/1967 15.36 Stove Pipe Top of Steel 23.16 7.80
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
10/9/1967 15.41 Stove Pipe Top of Steel 23.16 7.75
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
9/5/1967 15.34 Stove Pipe Top of Steel 23.16 7.82
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
8/8/1967 15.04 Stove Pipe Top of Steel 23.16 8.12
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
7/12/1967 14.29 Stove Pipe Top of Steel 23.16 8.87
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
6/1/1967 13.20 Stove Pipe Top of Steel 23.16 9.96
32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles
5/2/1967 12.20 Stove Pipe Top of Steel 23.16 10.96
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Item 11.a. - Page 134
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F02 Highway 1 Middle Paso Robles 10/7/2020 15.80 Stove Pipe Top of Steel 23.16 7.37
32S/13E-30F02 Highway 1 Middle Paso Robles 7/6/2020 14.19 Stove Pipe Top of Steel 23.16 8.98
32S/13E-30F02 Highway 1 Middle Paso Robles 4/7/2020 14.23 Stove Pipe Top of Steel 23.16 8.94
32S/13E-30F02 Highway 1 Middle Paso Robles 1/7/2020 14.99 Stove Pipe Top of Steel 23.16 8.17
32S/13E-30F02 Highway 1 Middle Paso Robles 10/9/2019 15.55 Stove Pipe Top of Steel 23.16 7.61
32S/13E-30F02 Highway 1 Middle Paso Robles 7/9/2019 14.90 Stove Pipe Top of Steel 23.16 8.26
32S/13E-30F02 Highway 1 Middle Paso Robles 4/9/2019 14.87 Stove Pipe Top of Steel 23.16 8.29
32S/13E-30F02 Highway 1 Middle Paso Robles 1/8/2019 15.11 Stove Pipe Top of Steel 23.16 8.05
32S/13E-30F02 Highway 1 Middle Paso Robles 10/9/2018 15.94 Stove Pipe Top of Steel 23.16 7.22
32S/13E-30F02 Highway 1 Middle Paso Robles 7/10/2018 15.90 Stove Pipe Top of Steel 23.16 7.26
32S/13E-30F02 Highway 1 Middle Paso Robles 4/10/2018 14.62 Stove Pipe Top of Steel 23.16 8.54
32S/13E-30F02 Highway 1 Middle Paso Robles 1/10/2018 14.79 Stove Pipe Top of Steel 23.16 8.37
32S/13E-30F02 Highway 1 Middle Paso Robles 10/10/2017 15.45 Stove Pipe Top of Steel 23.16 7.71
32S/13E-30F02 Highway 1 Middle Paso Robles 7/11/2017 15.30 Stove Pipe Top of Steel 23.16 7.86
32S/13E-30F02 Highway 1 Middle Paso Robles 4/11/2017 14.27 Stove Pipe Top of Steel 23.16 8.89
32S/13E-30F02 Highway 1 Middle Paso Robles 1/10/2017 14.53 Stove Pipe Top of Steel 23.16 8.63
32S/13E-30F02 Highway 1 Middle Paso Robles 10/12/2016 17.35 Stove Pipe Top of Steel 23.16 5.81
32S/13E-30F02 Highway 1 Middle Paso Robles 7/19/2016 17.63 Stove Pipe Top of Steel 23.16 5.53
32S/13E-30F02 Highway 1 Middle Paso Robles 4/12/2016 15.98 Stove Pipe Top of Steel 23.16 7.18
32S/13E-30F02 Highway 1 Middle Paso Robles 1/12/2016 15.29 Stove Pipe Top of Steel 23.16 7.87
32S/13E-30F02 Highway 1 Middle Paso Robles 10/13/2015 17.29 Stove Pipe Top of Steel 23.16 5.87
32S/13E-30F02 Highway 1 Middle Paso Robles 7/14/2015 17.44 Stove Pipe Top of Steel 23.16 5.72
32S/13E-30F02 Highway 1 Middle Paso Robles 4/14/2015 16.94 Stove Pipe Top of Steel 23.16 6.22
32S/13E-30F02 Highway 1 Middle Paso Robles 1/13/2015 16.41 Stove Pipe Top of Steel 23.16 6.75
32S/13E-30F02 Highway 1 Middle Paso Robles 10/14/2014 17.33 Stove Pipe Top of Steel 23.16 5.83
32S/13E-30F02 Highway 1 Middle Paso Robles 7/29/2014 17.31 Stove Pipe Top of Steel 23.16 5.85
32S/13E-30F02 Highway 1 Middle Paso Robles 6/4/2014 18.00 Stove Pipe Top of Steel 23.16 5.16
32S/13E-30F02 Highway 1 Middle Paso Robles 4/15/2014 16.27 Stove Pipe Top of Steel 23.16 6.89
32S/13E-30F02 Highway 1 Middle Paso Robles 1/14/2014 17.01 Stove Pipe Top of Steel 23.16 6.15
32S/13E-30F02 Highway 1 Middle Paso Robles 10/14/2013 17.52 Stove Pipe Top of Steel 23.16 5.64
32S/13E-30F02 Highway 1 Middle Paso Robles 7/9/2013 17.15 Stove Pipe Top of Steel 23.16 6.01
32S/13E-30F02 Highway 1 Middle Paso Robles 4/10/2013 15.76 Stove Pipe Top of Steel 23.16 7.4
32S/13E-30F02 Highway 1 Middle Paso Robles 1/14/2013 15.01 Stove Pipe Top of Steel 23.16 8.15
32S/13E-30F02 Highway 1 Middle Paso Robles 10/30/2012 15.27 Stove Pipe Top of Steel 23.16 7.89
32S/13E-30F02 Highway 1 Middle Paso Robles 7/24/2012 14.82 Stove Pipe Top of Steel 23.16 8.34
32S/13E-30F02 Highway 1 Middle Paso Robles 4/18/2012 14.38 Stove Pipe Top of Steel 23.16 8.78
32S/13E-30F02 Highway 1 Middle Paso Robles 1/12/2012 14.31 Stove Pipe Top of Steel 23.16 8.85
32S/13E-30F02 Highway 1 Middle Paso Robles 11/21/2011 14.94 Stove Pipe Top of Steel 23.16 8.22
32S/13E-30F02 Highway 1 Middle Paso Robles 7/26/2011 14.46 Stove Pipe Top of Steel 23.16 8.7
32S/13E-30F02 Highway 1 Middle Paso Robles 4/20/2011 14.23 Stove Pipe Top of Steel 23.16 8.93
32S/13E-30F02 Highway 1 Middle Paso Robles 1/24/2011 14.36 Stove Pipe Top of Steel 23.16 8.80
32S/13E-30F02 Highway 1 Middle Paso Robles 10/21/2010 7.39 Stove Pipe Top of Steel 23.16 15.77
32S/13E-30F02 Highway 1 Middle Paso Robles 7/26/2010 16.21 Stove Pipe Top of Steel 23.16 6.95
32S/13E-30F02 Highway 1 Middle Paso Robles 4/27/2010 12.14 Flush Top Flush Mount 20.36 8.22
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Item 11.a. - Page 135
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F02 Highway 1 Middle Paso Robles 1/28/2010 13.09 Flush Top Flush Mount 20.36 7.27
32S/13E-30F02 Highway 1 Middle Paso Robles 10/19/2009 14.36 Flush Top Flush Mount 20.36 6.00
32S/13E-30F02 Highway 1 Middle Paso Robles 8/19/2009 14.81 Flush Top Flush Mount 20.36 5.55
32S/13E-30F02 Highway 1 Middle Paso Robles 5/12/2009 14.34 Flush Top Flush Mount 20.36 6.02
32S/13E-30F02 Highway 1 Middle Paso Robles 4/7/2009 12.28 Flush Top Flush Mount 20.36 8.08
32S/13E-30F02 Highway 1 Middle Paso Robles 10/15/2008 15.34 Flush Top Flush Mount 20.36 5.02
32S/13E-30F02 Highway 1 Middle Paso Robles 4/15/2008 12.40 Flush Top Flush Mount 20.36 7.96
32S/13E-30F02 Highway 1 Middle Paso Robles 10/18/2007 15.35 Flush Top Flush Mount 20.36 5.01
32S/13E-30F02 Highway 1 Middle Paso Robles 4/17/2007 12.43 Flush Top Flush Mount 20.36 7.93
32S/13E-30F02 Highway 1 Middle Paso Robles 10/19/2006 12.85 Flush Top Flush Mount 20.36 7.51
32S/13E-30F02 Highway 1 Middle Paso Robles 4/25/2006 9.85 Flush Top Flush Mount 20.36 10.51
32S/13E-30F02 Highway 1 Middle Paso Robles 10/7/2005 12.15 Flush Top Flush Mount 20.36 8.21
32S/13E-30F02 Highway 1 Middle Paso Robles 4/28/2005 11.35 Flush Top Flush Mount 20.36 9.01
32S/13E-30F02 Highway 1 Middle Paso Robles 10/27/2004 14.50 Flush Top Flush Mount 20.36 5.86
32S/13E-30F02 Highway 1 Middle Paso Robles 4/8/2004 10.40 Flush Top Flush Mount 20.36 9.96
32S/13E-30F02 Highway 1 Middle Paso Robles 10/14/2002 14.30 Flush Top Flush Mount 20.36 6.06
32S/13E-30F02 Highway 1 Middle Paso Robles 4/9/2002 11.10 Flush Top Flush Mount 20.36 9.26
32S/13E-30F02 Highway 1 Middle Paso Robles 10/5/2001 12.30 Flush Top Flush Mount 20.36 8.06
32S/13E-30F02 Highway 1 Middle Paso Robles 4/23/2001 10.10 Flush Top Flush Mount 20.36 10.26
32S/13E-30F02 Highway 1 Middle Paso Robles 10/16/2000 12.30 Flush Top Flush Mount 20.36 8.06
32S/13E-30F02 Highway 1 Middle Paso Robles 4/24/2000 11.00 Flush Top Flush Mount 20.36 9.36
32S/13E-30F02 Highway 1 Middle Paso Robles 10/29/1999 12.20 Flush Top Flush Mount 20.36 8.16
32S/13E-30F02 Highway 1 Middle Paso Robles 4/15/1999 10.30 Flush Top Flush Mount 20.36 10.06
32S/13E-30F02 Highway 1 Middle Paso Robles 10/20/1998 10.70 Flush Top Flush Mount 20.36 9.66
32S/13E-30F02 Highway 1 Middle Paso Robles 4/23/1998 8.30 Flush Top Flush Mount 20.36 12.06
32S/13E-30F02 Highway 1 Middle Paso Robles 10/22/1997 12.30 Flush Top Flush Mount 20.36 8.06
32S/13E-30F02 Highway 1 Middle Paso Robles 4/29/1997 11.20 Flush Top Flush Mount 20.36 9.16
32S/13E-30F02 Highway 1 Middle Paso Robles 10/23/1996 12.05 Flush Top Flush Mount 20.36 8.31
32S/13E-30F02 Highway 1 Middle Paso Robles 4/29/1996 10.80 Flush Top Flush Mount 20.36 9.56
32S/13E-30F02 Highway 1 Middle Paso Robles 10/11/1995 11.90 Flush Top Flush Mount 20.36 8.46
32S/13E-30F02 Highway 1 Middle Paso Robles 4/19/1995 10.05 Flush Top Flush Mount 20.36 10.31
32S/13E-30F02 Highway 1 Middle Paso Robles 11/1/1994 13.90 Flush Top Flush Mount 20.36 6.46
32S/13E-30F02 Highway 1 Middle Paso Robles 4/11/1994 11.79 Flush Top Flush Mount 20.36 8.57
32S/13E-30F02 Highway 1 Middle Paso Robles 10/13/1993 12.76 Flush Top Flush Mount 20.36 7.60
32S/13E-30F02 Highway 1 Middle Paso Robles 4/8/1993 10.48 Flush Top Flush Mount 20.36 9.88
32S/13E-30F02 Highway 1 Middle Paso Robles 11/4/1992 13.30 Flush Top Flush Mount 20.36 7.06
32S/13E-30F02 Highway 1 Middle Paso Robles 4/21/1992 9.45 Flush Top Flush Mount 20.36 10.91
32S/13E-30F02 Highway 1 Middle Paso Robles 10/11/1991 13.42 Flush Top Flush Mount 20.36 6.94
32S/13E-30F02 Highway 1 Middle Paso Robles 4/19/1991 13.05 Flush Top Flush Mount 20.36 7.31
32S/13E-30F02 Highway 1 Middle Paso Robles 10/11/1990 14.71 Flush Top Flush Mount 20.36 5.65
32S/13E-30F02 Highway 1 Middle Paso Robles 4/24/1990 13.15 Flush Top Flush Mount 20.36 7.21
32S/13E-30F02 Highway 1 Middle Paso Robles 10/4/1989 13.71 Flush Top Flush Mount 20.36 6.65
32S/13E-30F02 Highway 1 Middle Paso Robles 4/17/1989 14.50 Flush Top Flush Mount 20.36 5.86
32S/13E-30F02 Highway 1 Middle Paso Robles 10/20/1988 14.00 Flush Top Flush Mount 20.36 6.36
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Item 11.a. - Page 136
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F02 Highway 1 Middle Paso Robles 4/29/1988 12.85 Flush Top Flush Mount 20.36 7.51
32S/13E-30F02 Highway 1 Middle Paso Robles 4/21/1988 13.23 Flush Top Flush Mount 20.36 7.13
32S/13E-30F02 Highway 1 Middle Paso Robles 10/19/1987 13.97 Flush Top Flush Mount 20.36 6.39
32S/13E-30F02 Highway 1 Middle Paso Robles 4/13/1987 11.96 Flush Top Flush Mount 20.36 8.40
32S/13E-30F02 Highway 1 Middle Paso Robles 10/31/1986 12.56 Flush Top Flush Mount 20.36 7.80
32S/13E-30F02 Highway 1 Middle Paso Robles 4/15/1986 11.97 Flush Top Flush Mount 20.36 8.39
32S/13E-30F02 Highway 1 Middle Paso Robles 10/18/1985 13.40 Flush Top Flush Mount 20.36 6.96
32S/13E-30F02 Highway 1 Middle Paso Robles 4/22/1985 11.80 Flush Top Flush Mount 20.36 8.56
32S/13E-30F02 Highway 1 Middle Paso Robles 10/15/1984 11.48 Flush Top Flush Mount 20.36 8.88
32S/13E-30F02 Highway 1 Middle Paso Robles 10/28/1983 10.10 Flush Top Flush Mount 20.36 10.26
32S/13E-30F02 Highway 1 Middle Paso Robles 5/6/1982 10.95 Flush Top Flush Mount 20.36 9.41
32S/13E-30F02 Highway 1 Middle Paso Robles 10/19/1981 11.70 Flush Top Flush Mount 20.36 8.66
32S/13E-30F02 Highway 1 Middle Paso Robles 4/21/1981 10.73 Flush Top Flush Mount 20.36 9.63
32S/13E-30F02 Highway 1 Middle Paso Robles 10/10/1980 11.75 Flush Top Flush Mount 20.36 8.61
32S/13E-30F02 Highway 1 Middle Paso Robles 5/9/1980 11.88 Flush Top Flush Mount 20.36 8.48
32S/13E-30F02 Highway 1 Middle Paso Robles 11/7/1979 11.20 Flush Top Flush Mount 20.36 9.16
32S/13E-30F02 Highway 1 Middle Paso Robles 4/17/1979 11.25 Flush Top Flush Mount 20.36 9.11
32S/13E-30F02 Highway 1 Middle Paso Robles 12/4/1978 10.45 Flush Top Flush Mount 20.36 9.91
32S/13E-30F02 Highway 1 Middle Paso Robles 4/24/1978 10.15 Flush Top Flush Mount 20.36 10.21
32S/13E-30F02 Highway 1 Middle Paso Robles 11/7/1977 13.65 Flush Top Flush Mount 20.36 6.71
32S/13E-30F02 Highway 1 Middle Paso Robles 5/17/1977 13.19 Flush Top Flush Mount 20.36 7.17
32S/13E-30F02 Highway 1 Middle Paso Robles 6/9/1976 12.80 Flush Top Flush Mount 20.36 7.56
32S/13E-30F02 Highway 1 Middle Paso Robles 1/14/1976 12.00 Flush Top Flush Mount 20.36 8.36
32S/13E-30F02 Highway 1 Middle Paso Robles 7/7/1975 12.00 Flush Top Flush Mount 20.36 8.36
32S/13E-30F02 Highway 1 Middle Paso Robles 4/1/1975 10.00 Flush Top Flush Mount 20.36 10.36
32S/13E-30F02 Highway 1 Middle Paso Robles 6/7/1974 10.94 Flush Top Flush Mount 20.36 9.42
32S/13E-30F02 Highway 1 Middle Paso Robles 9/20/1973 11.85 Flush Top Flush Mount 20.36 8.51
32S/13E-30F02 Highway 1 Middle Paso Robles 6/29/1972 15.00 Flush Top Flush Mount 20.36 5.36
32S/13E-30F02 Highway 1 Middle Paso Robles 2/23/1972 11.00 Flush Top Flush Mount 20.36 9.36
32S/13E-30F02 Highway 1 Middle Paso Robles 11/29/1971 12.35 Flush Top Flush Mount 20.36 8.01
32S/13E-30F02 Highway 1 Middle Paso Robles 8/26/1971 12.10 Flush Top Flush Mount 20.36 8.26
32S/13E-30F02 Highway 1 Middle Paso Robles 6/2/1971 12.15 Flush Top Flush Mount 20.36 8.21
32S/13E-30F02 Highway 1 Middle Paso Robles 3/2/1971 11.35 Flush Top Flush Mount 20.36 9.01
32S/13E-30F02 Highway 1 Middle Paso Robles 12/15/1970 11.39 Flush Top Flush Mount 20.36 8.97
32S/13E-30F02 Highway 1 Middle Paso Robles 6/3/1970 14.81 Flush Top Flush Mount 20.36 5.55
32S/13E-30F02 Highway 1 Middle Paso Robles 3/27/1970 13.65 Flush Top Flush Mount 20.36 6.71
32S/13E-30F02 Highway 1 Middle Paso Robles 1/29/1970 12.72 Flush Top Flush Mount 20.36 7.64
32S/13E-30F02 Highway 1 Middle Paso Robles 10/3/1969 14.81 Flush Top Flush Mount 20.36 5.55
32S/13E-30F02 Highway 1 Middle Paso Robles 7/23/1969 14.90 Flush Top Flush Mount 20.36 5.46
32S/13E-30F02 Highway 1 Middle Paso Robles 6/24/1969 13.99 Flush Top Flush Mount 20.36 6.37
32S/13E-30F02 Highway 1 Middle Paso Robles 5/22/1969 13.83 Flush Top Flush Mount 20.36 6.53
32S/13E-30F02 Highway 1 Middle Paso Robles 4/18/1969 12.78 Flush Top Flush Mount 20.36 7.58
32S/13E-30F02 Highway 1 Middle Paso Robles 3/20/1969 12.08 Flush Top Flush Mount 20.36 8.28
32S/13E-30F02 Highway 1 Middle Paso Robles 2/21/1969 12.62 Flush Top Flush Mount 20.36 7.74
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Item 11.a. - Page 137
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F02 Highway 1 Middle Paso Robles 1/15/1969 14.92 Flush Top Flush Mount 20.36 5.44
32S/13E-30F02 Highway 1 Middle Paso Robles 11/14/1968 16.19 Flush Top Flush Mount 20.36 4.17
32S/13E-30F02 Highway 1 Middle Paso Robles 10/17/1968 17.30 Flush Top Flush Mount 20.36 3.06
32S/13E-30F02 Highway 1 Middle Paso Robles 9/14/1968 18.18 Flush Top Flush Mount 20.36 2.18
32S/13E-30F02 Highway 1 Middle Paso Robles 8/13/1968 17.40 Flush Top Flush Mount 20.36 2.96
32S/13E-30F02 Highway 1 Middle Paso Robles 7/22/1968 17.37 Flush Top Flush Mount 20.36 2.99
32S/13E-30F02 Highway 1 Middle Paso Robles 6/24/1968 17.17 Flush Top Flush Mount 20.36 3.19
32S/13E-30F02 Highway 1 Middle Paso Robles 5/30/1968 16.94 Flush Top Flush Mount 20.36 3.42
32S/13E-30F02 Highway 1 Middle Paso Robles 4/20/1968 15.24 Flush Top Flush Mount 20.36 5.12
32S/13E-30F02 Highway 1 Middle Paso Robles 3/21/1968 14.70 Flush Top Flush Mount 20.36 5.66
32S/13E-30F02 Highway 1 Middle Paso Robles 2/22/1968 13.85 Flush Top Flush Mount 20.36 6.51
32S/13E-30F02 Highway 1 Middle Paso Robles 1/17/1968 13.32 Flush Top Flush Mount 20.36 7.04
32S/13E-30F02 Highway 1 Middle Paso Robles 12/22/1967 13.99 Flush Top Flush Mount 20.36 6.37
32S/13E-30F02 Highway 1 Middle Paso Robles 11/13/1967 15.77 Flush Top Flush Mount 20.36 4.59
32S/13E-30F02 Highway 1 Middle Paso Robles 10/9/1967 14.98 Flush Top Flush Mount 20.36 5.38
32S/13E-30F02 Highway 1 Middle Paso Robles 9/5/1967 15.32 Flush Top Flush Mount 20.36 5.04
32S/13E-30F02 Highway 1 Middle Paso Robles 8/8/1967 15.65 Flush Top Flush Mount 20.36 4.71
32S/13E-30F02 Highway 1 Middle Paso Robles 7/12/1967 14.94 Flush Top Flush Mount 20.36 5.42
32S/13E-30F02 Highway 1 Middle Paso Robles 6/1/1967 14.50 Flush Top Flush Mount 20.36 5.86
32S/13E-30F02 Highway 1 Middle Paso Robles 5/2/1967 13.40 Flush Top Flush Mount 20.36 6.96
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Item 11.a. - Page 138
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F03 Highway 1 Deep Careaga 10/7/2020 16.15 Stove Pipe Top of Steel 23.16 7.01
32S/13E-30F03 Highway 1 Deep Careaga 7/6/2020 13.68 Stove Pipe Top of Steel 23.16 9.48
32S/13E-30F03 Highway 1 Deep Careaga 4/7/2020 11.19 Stove Pipe Top of Steel 23.16 11.97
32S/13E-30F03 Highway 1 Deep Careaga 1/7/2020 12.13 Stove Pipe Top of Steel 23.16 11.03
32S/13E-30F03 Highway 1 Deep Careaga 10/9/2019 14.40 Stove Pipe Top of Steel 23.16 8.76
32S/13E-30F03 Highway 1 Deep Careaga 7/9/2019 13.38 Stove Pipe Top of Steel 23.16 9.78
32S/13E-30F03 Highway 1 Deep Careaga 4/9/2019 12.55 Stove Pipe Top of Steel 23.16 10.61
32S/13E-30F03 Highway 1 Deep Careaga 1/8/2019 14.27 Stove Pipe Top of Steel 23.16 8.89
32S/13E-30F03 Highway 1 Deep Careaga 10/9/2018 15.48 Stove Pipe Top of Steel 23.16 7.68
32S/13E-30F03 Highway 1 Deep Careaga 7/10/2018 16.11 Stove Pipe Top of Steel 23.16 7.05
32S/13E-30F03 Highway 1 Deep Careaga 4/10/2018 12.16 Stove Pipe Top of Steel 23.16 11.00
32S/13E-30F03 Highway 1 Deep Careaga 1/10/2018 12.85 Stove Pipe Top of Steel 23.16 10.31
32S/13E-30F03 Highway 1 Deep Careaga 10/10/2017 14.70 Stove Pipe Top of Steel 23.16 8.46
32S/13E-30F03 Highway 1 Deep Careaga 7/11/2017 13.64 Stove Pipe Top of Steel 23.16 9.52
32S/13E-30F03 Highway 1 Deep Careaga 4/11/2017 12.36 Stove Pipe Top of Steel 23.16 10.80
32S/13E-30F03 Highway 1 Deep Careaga 1/10/2017 14.25 Stove Pipe Top of Steel 23.16 8.91
32S/13E-30F03 Highway 1 Deep Careaga 10/12/2016 17.82 Stove Pipe Top of Steel 23.16 5.34
32S/13E-30F03 Highway 1 Deep Careaga 7/19/2016 17.22 Stove Pipe Top of Steel 23.16 5.94
32S/13E-30F03 Highway 1 Deep Careaga 4/12/2016 14.90 Stove Pipe Top of Steel 23.16 8.26
32S/13E-30F03 Highway 1 Deep Careaga 1/12/2016 14.84 Stove Pipe Top of Steel 23.16 8.32
32S/13E-30F03 Highway 1 Deep Careaga 10/13/2015 18.87 Stove Pipe Top of Steel 23.16 4.29
32S/13E-30F03 Highway 1 Deep Careaga 7/14/2015 18.87 Stove Pipe Top of Steel 23.16 4.29
32S/13E-30F03 Highway 1 Deep Careaga 4/14/2015 17.92 Stove Pipe Top of Steel 23.16 5.24
32S/13E-30F03 Highway 1 Deep Careaga 1/13/2015 14.13 Stove Pipe Top of Steel 23.16 9.03
32S/13E-30F03 Highway 1 Deep Careaga 10/14/2014 18.98 Stove Pipe Top of Steel 23.16 4.18
32S/13E-30F03 Highway 1 Deep Careaga 7/29/2014 18.62 Stove Pipe Top of Steel 23.16 4.54
32S/13E-30F03 Highway 1 Deep Careaga 6/4/2014 22.27 Stove Pipe Top of Steel 23.16 0.89
32S/13E-30F03 Highway 1 Deep Careaga 5/5/2014 21.34 Stove Pipe Top of Steel 23.16 1.82
32S/13E-30F03 Highway 1 Deep Careaga 4/15/2014 16.14 Stove Pipe Top of Steel 23.16 7.02
32S/13E-30F03 Highway 1 Deep Careaga 1/14/2014 15.35 Stove Pipe Top of Steel 23.16 7.81
32S/13E-30F03 Highway 1 Deep Careaga 10/14/2013 17.30 Stove Pipe Top of Steel 23.16 5.86
32S/13E-30F03 Highway 1 Deep Careaga 7/9/2013 16.61 Stove Pipe Top of Steel 23.16 6.55
32S/13E-30F03 Highway 1 Deep Careaga 4/10/2013 14.69 Stove Pipe Top of Steel 23.16 8.47
32S/13E-30F03 Highway 1 Deep Careaga 1/14/2013 12.62 Stove Pipe Top of Steel 23.16 10.54
32S/13E-30F03 Highway 1 Deep Careaga 10/30/2012 14.61 Stove Pipe Top of Steel 23.16 8.55
32S/13E-30F03 Highway 1 Deep Careaga 7/24/2012 14.50 Stove Pipe Top of Steel 23.16 8.66
32S/13E-30F03 Highway 1 Deep Careaga 4/18/2012 10.43 Stove Pipe Top of Steel 23.16 12.73
32S/13E-30F03 Highway 1 Deep Careaga 1/12/2012 12.37 Stove Pipe Top of Steel 23.16 10.79
32S/13E-30F03 Highway 1 Deep Careaga 11/21/2011 13.24 Stove Pipe Top of Steel 23.16 9.92
32S/13E-30F03 Highway 1 Deep Careaga 7/26/2011 14.22 Stove Pipe Top of Steel 23.16 8.94
32S/13E-30F03 Highway 1 Deep Careaga 4/20/2011 12.51 Stove Pipe Top of Steel 23.16 10.65
32S/13E-30F03 Highway 1 Deep Careaga 1/24/2011 12.67 Stove Pipe Top of Steel 23.16 10.49
32S/13E-30F03 Highway 1 Deep Careaga 10/21/2010 6.62 Stove Pipe Top of Steel 23.16 16.54
32S/13E-30F03 Highway 1 Deep Careaga 7/26/2010 17.32 Stove Pipe Top of Steel 23.16 5.84
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Item 11.a. - Page 139
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F03 Highway 1 Deep Careaga 4/27/2010 11.38 Flush Top Flush Mount 20.36 8.98
32S/13E-30F03 Highway 1 Deep Careaga 1/28/2010 10.98 Flush Top Flush Mount 20.36 9.38
32S/13E-30F03 Highway 1 Deep Careaga 10/19/2009 14.18 Flush Top Flush Mount 20.36 6.18
32S/13E-30F03 Highway 1 Deep Careaga 8/19/2009 20.23 Flush Top Flush Mount 20.36 0.13
32S/13E-30F03 Highway 1 Deep Careaga 5/12/2009 17.68 Flush Top Flush Mount 20.36 2.68
32S/13E-30F03 Highway 1 Deep Careaga 10/15/2008 22.52 Flush Top Flush Mount 20.36 -2.16
32S/13E-30F03 Highway 1 Deep Careaga 4/15/2008 17.86 Flush Top Flush Mount 20.36 2.50
32S/13E-30F03 Highway 1 Deep Careaga 10/18/2007 22.35 Flush Top Flush Mount 20.36 -1.99
32S/13E-30F03 Highway 1 Deep Careaga 4/17/2007 21.75 Flush Top Flush Mount 20.36 -1.39
32S/13E-30F03 Highway 1 Deep Careaga 10/19/2006 13.65 Flush Top Flush Mount 20.36 6.71
32S/13E-30F03 Highway 1 Deep Careaga 4/26/2006 10.45 Flush Top Flush Mount 20.36 9.91
32S/13E-30F03 Highway 1 Deep Careaga 10/7/2005 14.65 Flush Top Flush Mount 20.36 5.71
32S/13E-30F03 Highway 1 Deep Careaga 4/28/2005 13.40 Flush Top Flush Mount 20.36 6.96
32S/13E-30F03 Highway 1 Deep Careaga 10/27/2004 20.00 Flush Top Flush Mount 20.36 0.36
32S/13E-30F03 Highway 1 Deep Careaga 4/8/2004 13.90 Flush Top Flush Mount 20.36 6.46
32S/13E-30F03 Highway 1 Deep Careaga 10/14/2002 16.10 Flush Top Flush Mount 20.36 4.26
32S/13E-30F03 Highway 1 Deep Careaga 4/9/2002 13.50 Flush Top Flush Mount 20.36 6.86
32S/13E-30F03 Highway 1 Deep Careaga 10/5/2001 13.40 Flush Top Flush Mount 20.36 6.96
32S/13E-30F03 Highway 1 Deep Careaga 4/23/2001 8.10 Flush Top Flush Mount 20.36 12.26
32S/13E-30F03 Highway 1 Deep Careaga 10/16/2000 12.10 Flush Top Flush Mount 20.36 8.26
32S/13E-30F03 Highway 1 Deep Careaga 4/24/2000 16.20 Flush Top Flush Mount 20.36 4.16
32S/13E-30F03 Highway 1 Deep Careaga 10/29/1999 11.50 Flush Top Flush Mount 20.36 8.86
32S/13E-30F03 Highway 1 Deep Careaga 4/15/1999 7.09 Flush Top Flush Mount 20.36 13.27
32S/13E-30F03 Highway 1 Deep Careaga 10/20/1998 14.70 Flush Top Flush Mount 20.36 5.66
32S/13E-30F03 Highway 1 Deep Careaga 4/22/1998 8.75 Flush Top Flush Mount 20.36 11.61
32S/13E-30F03 Highway 1 Deep Careaga 10/22/1997 17.86 Flush Top Flush Mount 20.36 2.50
32S/13E-30F03 Highway 1 Deep Careaga 4/29/1997 17.86 Flush Top Flush Mount 20.36 2.50
32S/13E-30F03 Highway 1 Deep Careaga 10/23/1996 19.34 Flush Top Flush Mount 20.36 1.02
32S/13E-30F03 Highway 1 Deep Careaga 4/29/1996 16.20 Flush Top Flush Mount 20.36 4.16
32S/13E-30F03 Highway 1 Deep Careaga 10/11/1995 23.00 Flush Top Flush Mount 20.36 -2.64
32S/13E-30F03 Highway 1 Deep Careaga 4/19/1995 11.60 Flush Top Flush Mount 20.36 8.76
32S/13E-30F03 Highway 1 Deep Careaga 11/1/1994 17.60 Flush Top Flush Mount 20.36 2.76
32S/13E-30F03 Highway 1 Deep Careaga 4/11/1994 14.05 Flush Top Flush Mount 20.36 6.31
32S/13E-30F03 Highway 1 Deep Careaga 10/13/1993 17.28 Flush Top Flush Mount 20.36 3.08
32S/13E-30F03 Highway 1 Deep Careaga 4/8/1993 10.25 Flush Top Flush Mount 20.36 10.11
32S/13E-30F03 Highway 1 Deep Careaga 11/4/1992 18.30 Flush Top Flush Mount 20.36 2.06
32S/13E-30F03 Highway 1 Deep Careaga 4/21/1992 15.20 Flush Top Flush Mount 20.36 5.16
32S/13E-30F03 Highway 1 Deep Careaga 10/11/1991 20.02 Flush Top Flush Mount 20.36 0.34
32S/13E-30F03 Highway 1 Deep Careaga 4/19/1991 16.82 Flush Top Flush Mount 20.36 3.54
32S/13E-30F03 Highway 1 Deep Careaga 10/11/1990 18.12 Flush Top Flush Mount 20.36 2.24
32S/13E-30F03 Highway 1 Deep Careaga 4/24/1990 15.03 Flush Top Flush Mount 20.36 5.33
32S/13E-30F03 Highway 1 Deep Careaga 10/4/1989 15.96 Flush Top Flush Mount 20.36 4.40
32S/13E-30F03 Highway 1 Deep Careaga 4/17/1989 16.40 Flush Top Flush Mount 20.36 3.96
32S/13E-30F03 Highway 1 Deep Careaga 10/20/1988 17.03 Flush Top Flush Mount 20.36 3.33
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 140
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F03 Highway 1 Deep Careaga 4/29/1988 14.70 Flush Top Flush Mount 20.36 5.66
32S/13E-30F03 Highway 1 Deep Careaga 10/19/1987 18.77 Flush Top Flush Mount 20.36 1.59
32S/13E-30F03 Highway 1 Deep Careaga 4/13/1987 12.89 Flush Top Flush Mount 20.36 7.47
32S/13E-30F03 Highway 1 Deep Careaga 10/31/1986 19.05 Flush Top Flush Mount 20.36 1.31
32S/13E-30F03 Highway 1 Deep Careaga 4/15/1986 15.83 Flush Top Flush Mount 20.36 4.53
32S/13E-30F03 Highway 1 Deep Careaga 10/18/1985 15.23 Flush Top Flush Mount 20.36 5.13
32S/13E-30F03 Highway 1 Deep Careaga 4/22/1985 12.00 Flush Top Flush Mount 20.36 8.36
32S/13E-30F03 Highway 1 Deep Careaga 10/15/1984 16.88 Flush Top Flush Mount 20.36 3.48
32S/13E-30F03 Highway 1 Deep Careaga 10/27/1983 7.48 Flush Top Flush Mount 20.36 12.88
32S/13E-30F03 Highway 1 Deep Careaga 5/6/1982 9.15 Flush Top Flush Mount 20.36 11.21
32S/13E-30F03 Highway 1 Deep Careaga 10/19/1981 11.12 Flush Top Flush Mount 20.36 9.24
32S/13E-30F03 Highway 1 Deep Careaga 4/21/1981 6.83 Flush Top Flush Mount 20.36 13.53
32S/13E-30F03 Highway 1 Deep Careaga 10/10/1980 9.75 Flush Top Flush Mount 20.36 10.61
32S/13E-30F03 Highway 1 Deep Careaga 5/9/1980 7.02 Flush Top Flush Mount 20.36 13.34
32S/13E-30F03 Highway 1 Deep Careaga 11/7/1979 7.88 Flush Top Flush Mount 20.36 12.48
32S/13E-30F03 Highway 1 Deep Careaga 4/17/1979 5.09 Flush Top Flush Mount 20.36 15.27
32S/13E-30F03 Highway 1 Deep Careaga 12/4/1978 6.02 Flush Top Flush Mount 20.36 14.34
32S/13E-30F03 Highway 1 Deep Careaga 4/24/1978 4.70 Flush Top Flush Mount 20.36 15.66
32S/13E-30F03 Highway 1 Deep Careaga 11/7/1977 10.75 Flush Top Flush Mount 20.36 9.61
32S/13E-30F03 Highway 1 Deep Careaga 5/17/1977 8.95 Flush Top Flush Mount 20.36 11.41
32S/13E-30F03 Highway 1 Deep Careaga 6/9/1976 14.24 Flush Top Flush Mount 20.36 6.12
32S/13E-30F03 Highway 1 Deep Careaga 1/14/1976 7.24 Flush Top Flush Mount 20.36 13.12
32S/13E-30F03 Highway 1 Deep Careaga 7/7/1975 8.42 Flush Top Flush Mount 20.36 11.94
32S/13E-30F03 Highway 1 Deep Careaga 4/1/1975 5.58 Flush Top Flush Mount 20.36 14.78
32S/13E-30F03 Highway 1 Deep Careaga 6/7/1974 5.54 Flush Top Flush Mount 20.36 14.82
32S/13E-30F03 Highway 1 Deep Careaga 9/20/1973 7.18 Flush Top Flush Mount 20.36 13.18
32S/13E-30F03 Highway 1 Deep Careaga 6/29/1972 9.62 Flush Top Flush Mount 20.36 10.74
32S/13E-30F03 Highway 1 Deep Careaga 2/23/1972 5.65 Flush Top Flush Mount 20.36 14.71
32S/13E-30F03 Highway 1 Deep Careaga 11/29/1971 6.78 Flush Top Flush Mount 20.36 13.58
32S/13E-30F03 Highway 1 Deep Careaga 8/26/1971 8.20 Flush Top Flush Mount 20.36 12.16
32S/13E-30F03 Highway 1 Deep Careaga 6/2/1971 7.34 Flush Top Flush Mount 20.36 13.02
32S/13E-30F03 Highway 1 Deep Careaga 3/2/1971 5.76 Flush Top Flush Mount 20.36 14.60
32S/13E-30F03 Highway 1 Deep Careaga 12/15/1970 5.79 Flush Top Flush Mount 20.36 14.57
32S/13E-30F03 Highway 1 Deep Careaga 8/4/1970 10.11 Flush Top Flush Mount 20.36 10.25
32S/13E-30F03 Highway 1 Deep Careaga 6/3/1970 9.88 Flush Top Flush Mount 20.36 10.48
32S/13E-30F03 Highway 1 Deep Careaga 3/27/1970 6.83 Flush Top Flush Mount 20.36 13.53
32S/13E-30F03 Highway 1 Deep Careaga 1/29/1970 6.35 Flush Top Flush Mount 20.36 14.01
32S/13E-30F03 Highway 1 Deep Careaga 10/3/1969 9.44 Flush Top Flush Mount 20.36 10.92
32S/13E-30F03 Highway 1 Deep Careaga 7/23/1969 10.05 Flush Top Flush Mount 20.36 10.31
32S/13E-30F03 Highway 1 Deep Careaga 6/24/1969 9.04 Flush Top Flush Mount 20.36 11.32
32S/13E-30F03 Highway 1 Deep Careaga 5/22/1969 7.91 Flush Top Flush Mount 20.36 12.45
32S/13E-30F03 Highway 1 Deep Careaga 4/18/1969 6.53 Flush Top Flush Mount 20.36 13.83
32S/13E-30F03 Highway 1 Deep Careaga 3/20/1969 6.57 Flush Top Flush Mount 20.36 13.79
32S/13E-30F03 Highway 1 Deep Careaga 2/21/1969 7.18 Flush Top Flush Mount 20.36 13.18
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Item 11.a. - Page 141
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30F03 Highway 1 Deep Careaga 1/15/1969 9.37 Flush Top Flush Mount 20.36 10.99
32S/13E-30F03 Highway 1 Deep Careaga 12/12/1968 10.33 Flush Top Flush Mount 20.36 10.03
32S/13E-30F03 Highway 1 Deep Careaga 11/14/1968 11.75 Flush Top Flush Mount 20.36 8.61
32S/13E-30F03 Highway 1 Deep Careaga 10/17/1968 13.55 Flush Top Flush Mount 20.36 6.81
32S/13E-30F03 Highway 1 Deep Careaga 9/14/1968 14.20 Flush Top Flush Mount 20.36 6.16
32S/13E-30F03 Highway 1 Deep Careaga 8/13/1968 13.65 Flush Top Flush Mount 20.36 6.71
32S/13E-30F03 Highway 1 Deep Careaga 6/24/1968 12.92 Flush Top Flush Mount 20.36 7.44
32S/13E-30F03 Highway 1 Deep Careaga 5/30/1968 11.91 Flush Top Flush Mount 20.36 8.45
32S/13E-30F03 Highway 1 Deep Careaga 4/20/1968 9.35 Flush Top Flush Mount 20.36 11.01
32S/13E-30F03 Highway 1 Deep Careaga 3/21/1968 8.25 Flush Top Flush Mount 20.36 12.11
32S/13E-30F03 Highway 1 Deep Careaga 2/22/1968 7.67 Flush Top Flush Mount 20.36 12.69
32S/13E-30F03 Highway 1 Deep Careaga 1/17/1968 7.61 Flush Top Flush Mount 20.36 12.75
32S/13E-30F03 Highway 1 Deep Careaga 12/8/1967 8.57 Flush Top Flush Mount 20.36 11.79
32S/13E-30F03 Highway 1 Deep Careaga 11/13/1967 9.93 Flush Top Flush Mount 20.36 10.43
32S/13E-30F03 Highway 1 Deep Careaga 10/9/1967 10.12 Flush Top Flush Mount 20.36 10.24
32S/13E-30F03 Highway 1 Deep Careaga 9/5/1967 10.45 Flush Top Flush Mount 20.36 9.91
32S/13E-30F03 Highway 1 Deep Careaga 8/8/1967 10.16 Flush Top Flush Mount 20.36 10.20
32S/13E-30F03 Highway 1 Deep Careaga 7/12/1967 9.40 Flush Top Flush Mount 20.36 10.96
32S/13E-30F03 Highway 1 Deep Careaga 6/1/1967 8.30 Flush Top Flush Mount 20.36 12.06
32S/13E-30F03 Highway 1 Deep Careaga 5/2/1967 7.13 Flush Top Flush Mount 20.36 13.23
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Item 11.a. - Page 142
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N01 Pier Ave Shallow Alluvium 10/7/2020 9.31 Stove Pipe Top of Steel 16.13 6.83
32S/13E-30N01 Pier Ave Shallow Alluvium 7/6/2020 9.17 Stove Pipe Top of Steel 16.13 6.97
32S/13E-30N01 Pier Ave Shallow Alluvium 4/7/2020 8.92 Stove Pipe Top of Steel 16.13 7.22
32S/13E-30N01 Pier Ave Shallow Alluvium 1/7/2020 8.95 Stove Pipe Top of Steel 16.13 7.18
32S/13E-30N01 Pier Ave Shallow Alluvium 10/9/2019 9.63 Stove Pipe Top of Steel 16.13 6.50
32S/13E-30N01 Pier Ave Shallow Alluvium 7/9/2019 9.25 Stove Pipe Top of Steel 16.13 6.88
32S/13E-30N01 Pier Ave Shallow Alluvium 4/9/2019 8.91 Stove Pipe Top of Steel 16.13 7.22
32S/13E-30N01 Pier Ave Shallow Alluvium 1/8/2019 8.60 Stove Pipe Top of Steel 16.13 7.53
32S/13E-30N01 Pier Ave Shallow Alluvium 10/9/2018 9.35 Stove Pipe Top of Steel 16.13 6.78
32S/13E-30N01 Pier Ave Shallow Alluvium 7/10/2018 9.46 Stove Pipe Top of Steel 16.13 6.67
32S/13E-30N01 Pier Ave Shallow Alluvium 4/10/2018 9.04 Stove Pipe Top of Steel 16.13 7.09
32S/13E-30N01 Pier Ave Shallow Alluvium 1/10/2018 8.97 Stove Pipe Top of Steel 16.13 7.16
32S/13E-30N01 Pier Ave Shallow Alluvium 10/10/2017 9.35 Stove Pipe Top of Steel 16.13 6.78
32S/13E-30N01 Pier Ave Shallow Alluvium 7/11/2017 9.00 Stove Pipe Top of Steel 16.13 7.13
32S/13E-30N01 Pier Ave Shallow Alluvium 4/11/2017 8.70 Stove Pipe Top of Steel 16.13 7.43
32S/13E-30N01 Pier Ave Shallow Alluvium 1/10/2017 7.89 Stove Pipe Top of Steel 16.13 8.24
32S/13E-30N01 Pier Ave Shallow Alluvium 10/12/2016 10.21 Stove Pipe Top of Steel 16.13 5.92
32S/13E-30N01 Pier Ave Shallow Alluvium 7/19/2016 9.91 Stove Pipe Top of Steel 16.13 6.22
32S/13E-30N01 Pier Ave Shallow Alluvium 4/12/2016 8.93 Stove Pipe Top of Steel 16.13 7.20
32S/13E-30N01 Pier Ave Shallow Alluvium 1/12/2016 8.73 Stove Pipe Top of Steel 16.13 7.40
32S/13E-30N01 Pier Ave Shallow Alluvium 10/13/2015 10.11 Stove Pipe Top of Steel 16.13 6.02
32S/13E-30N01 Pier Ave Shallow Alluvium 7/14/2015 9.91 Stove Pipe Top of Steel 16.13 6.22
32S/13E-30N01 Pier Ave Shallow Alluvium 4/14/2015 9.51 Stove Pipe Top of Steel 16.13 6.62
32S/13E-30N01 Pier Ave Shallow Alluvium 1/13/2015 9.03 Stove Pipe Top of Steel 16.13 7.10
32S/13E-30N01 Pier Ave Shallow Alluvium 10/14/2014 9.95 Stove Pipe Top of Steel 16.13 6.18
32S/13E-30N01 Pier Ave Shallow Alluvium 7/29/2014 9.88 Stove Pipe Top of Steel 16.13 6.25
32S/13E-30N01 Pier Ave Shallow Alluvium 6/4/2014 9.54 Stove Pipe Top of Steel 16.13 6.59
32S/13E-30N01 Pier Ave Shallow Alluvium 4/15/2014 9.17 Stove Pipe Top of Steel 16.13 6.96
32S/13E-30N01 Pier Ave Shallow Alluvium 1/14/2014 9.61 Stove Pipe Top of Steel 16.13 6.52
32S/13E-30N01 Pier Ave Shallow Alluvium 10/14/2013 9.86 Stove Pipe Top of Steel 16.13 6.27
32S/13E-30N01 Pier Ave Shallow Alluvium 7/9/2013 9.40 Stove Pipe Top of Steel 16.13 6.73
32S/13E-30N01 Pier Ave Shallow Alluvium 4/10/2013 8.98 Stove Pipe Top of Steel 16.13 7.15
32S/13E-30N01 Pier Ave Shallow Alluvium 1/14/2013 8.60 Stove Pipe Top of Steel 16.13 7.53
32S/13E-30N01 Pier Ave Shallow Alluvium 10/29/2012 8.96 Stove Pipe Top of Steel 16.13 7.17
32S/13E-30N01 Pier Ave Shallow Alluvium 7/23/2012 8.54 Stove Pipe Top of Steel 16.13 7.59
32S/13E-30N01 Pier Ave Shallow Alluvium 4/18/2012 8.53 Stove Pipe Top of Steel 16.13 7.60
32S/13E-30N01 Pier Ave Shallow Alluvium 1/9/2012 8.74 Stove Pipe Top of Steel 16.13 7.39
32S/13E-30N01 Pier Ave Shallow Alluvium 11/21/2011 8.78 Stove Pipe Top of Steel 16.13 7.35
32S/13E-30N01 Pier Ave Shallow Alluvium 7/26/2011 9.01 Stove Pipe Top of Steel 16.13 7.12
32S/13E-30N01 Pier Ave Shallow Alluvium 4/20/2011 8.59 Stove Pipe Top of Steel 16.13 7.54
32S/13E-30N01 Pier Ave Shallow Alluvium 1/24/2011 8.18 Stove Pipe Top of Steel 16.13 7.95
32S/13E-30N01 Pier Ave Shallow Alluvium 10/21/2010 9.99 Stove Pipe Top of Steel 16.13 6.14
32S/13E-30N01 Pier Ave Shallow Alluvium 7/27/2010 8.97 Stove Pipe Top of Steel 16.13 7.16
32S/13E-30N01 Pier Ave Shallow Alluvium 4/27/2010 6.14 Flush Top Flush Mount 13.53 7.39
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Item 11.a. - Page 143
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N01 Pier Ave Shallow Alluvium 1/26/2010 4.90 Flush Top Flush Mount 13.53 8.63
32S/13E-30N01 Pier Ave Shallow Alluvium 10/20/2009 6.53 Flush Top Flush Mount 13.53 7.00
32S/13E-30N01 Pier Ave Shallow Alluvium 8/20/2009 6.71 Flush Top Flush Mount 13.53 6.82
32S/13E-30N01 Pier Ave Shallow Alluvium 5/11/2009 6.03 Flush Top Flush Mount 13.53 7.50
32S/13E-30N01 Pier Ave Shallow Alluvium 4/7/2009 5.83 Flush Top Flush Mount 13.53 7.70
32S/13E-30N01 Pier Ave Shallow Alluvium 10/15/2008 7.19 Flush Top Flush Mount 13.53 6.34
32S/13E-30N01 Pier Ave Shallow Alluvium 4/15/2008 6.20 Flush Top Flush Mount 13.53 7.33
32S/13E-30N01 Pier Ave Shallow Alluvium 10/18/2007 7.20 Flush Top Flush Mount 13.53 6.33
32S/13E-30N01 Pier Ave Shallow Alluvium 4/25/2006 5.55 Flush Top Flush Mount 13.53 7.98
32S/13E-30N01 Pier Ave Shallow Alluvium 10/7/2005 6.85 Flush Top Flush Mount 13.53 6.68
32S/13E-30N01 Pier Ave Shallow Alluvium 4/29/2005 5.35 Flush Top Flush Mount 13.53 8.18
32S/13E-30N01 Pier Ave Shallow Alluvium 10/27/2004 6.50 Flush Top Flush Mount 13.53 7.03
32S/13E-30N01 Pier Ave Shallow Alluvium 4/8/2004 5.80 Flush Top Flush Mount 13.53 7.73
32S/13E-30N01 Pier Ave Shallow Alluvium 10/14/2002 6.60 Flush Top Flush Mount 13.53 6.93
32S/13E-30N01 Pier Ave Shallow Alluvium 4/9/2002 5.70 Flush Top Flush Mount 13.53 7.83
32S/13E-30N01 Pier Ave Shallow Alluvium 10/5/2001 5.80 Flush Top Flush Mount 13.53 7.73
32S/13E-30N01 Pier Ave Shallow Alluvium 4/23/2001 5.00 Flush Top Flush Mount 13.53 8.53
32S/13E-30N01 Pier Ave Shallow Alluvium 10/16/2000 5.90 Flush Top Flush Mount 13.53 7.63
32S/13E-30N01 Pier Ave Shallow Alluvium 4/24/2000 5.20 Flush Top Flush Mount 13.53 8.33
32S/13E-30N01 Pier Ave Shallow Alluvium 10/29/1999 6.10 Flush Top Flush Mount 13.53 7.43
32S/13E-30N01 Pier Ave Shallow Alluvium 4/15/1999 5.50 Flush Top Flush Mount 13.53 8.03
32S/13E-30N01 Pier Ave Shallow Alluvium 10/20/1998 6.20 Flush Top Flush Mount 13.53 7.33
32S/13E-30N01 Pier Ave Shallow Alluvium 4/22/1998 4.90 Flush Top Flush Mount 13.53 8.63
32S/13E-30N01 Pier Ave Shallow Alluvium 10/22/1997 6.02 Flush Top Flush Mount 13.53 7.51
32S/13E-30N01 Pier Ave Shallow Alluvium 4/29/1997 6.10 Flush Top Flush Mount 13.53 7.43
32S/13E-30N01 Pier Ave Shallow Alluvium 10/23/1996 6.15 Flush Top Flush Mount 13.53 7.38
32S/13E-30N01 Pier Ave Shallow Alluvium 4/29/1996 5.80 Flush Top Flush Mount 13.53 7.73
32S/13E-30N01 Pier Ave Shallow Alluvium 10/10/1995 6.20 Flush Top Flush Mount 13.53 7.33
32S/13E-30N01 Pier Ave Shallow Alluvium 4/19/1995 5.20 Flush Top Flush Mount 13.53 8.33
32S/13E-30N01 Pier Ave Shallow Alluvium 11/1/1994 6.60 Flush Top Flush Mount 13.53 6.93
32S/13E-30N01 Pier Ave Shallow Alluvium 4/11/1994 5.80 Flush Top Flush Mount 13.53 7.73
32S/13E-30N01 Pier Ave Shallow Alluvium 10/13/1993 6.33 Flush Top Flush Mount 13.53 7.20
32S/13E-30N01 Pier Ave Shallow Alluvium 4/8/1993 5.40 Flush Top Flush Mount 13.53 8.13
32S/13E-30N01 Pier Ave Shallow Alluvium 11/4/1992 6.10 Flush Top Flush Mount 13.53 7.43
32S/13E-30N01 Pier Ave Shallow Alluvium 4/21/1992 5.17 Flush Top Flush Mount 13.53 8.36
32S/13E-30N01 Pier Ave Shallow Alluvium 4/11/1991 5.16 Flush Top Flush Mount 13.53 8.37
32S/13E-30N01 Pier Ave Shallow Alluvium 10/11/1990 6.93 Flush Top Flush Mount 13.53 6.60
32S/13E-30N01 Pier Ave Shallow Alluvium 4/24/1990 6.10 Flush Top Flush Mount 13.53 7.43
32S/13E-30N01 Pier Ave Shallow Alluvium 10/4/1989 6.65 Flush Top Flush Mount 13.53 6.88
32S/13E-30N01 Pier Ave Shallow Alluvium 4/17/1989 6.23 Flush Top Flush Mount 13.53 7.30
32S/13E-30N01 Pier Ave Shallow Alluvium 10/20/1988 6.77 Flush Top Flush Mount 13.53 6.76
32S/13E-30N01 Pier Ave Shallow Alluvium 4/28/1988 6.13 Flush Top Flush Mount 13.53 7.40
32S/13E-30N01 Pier Ave Shallow Alluvium 4/21/1988 5.77 Flush Top Flush Mount 13.53 7.76
32S/13E-30N01 Pier Ave Shallow Alluvium 10/19/1987 6.61 Flush Top Flush Mount 13.53 6.92
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 144
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N01 Pier Ave Shallow Alluvium 4/13/1987 5.99 Flush Top Flush Mount 13.53 7.54
32S/13E-30N01 Pier Ave Shallow Alluvium 11/5/1986 6.26 Flush Top Flush Mount 13.53 7.27
32S/13E-30N01 Pier Ave Shallow Alluvium 4/15/1986 4.89 Flush Top Flush Mount 13.53 8.64
32S/13E-30N01 Pier Ave Shallow Alluvium 4/22/1985 5.40 Flush Top Flush Mount 13.53 8.13
32S/13E-30N01 Pier Ave Shallow Alluvium 10/24/1984 6.00 Flush Top Flush Mount 13.53 7.53
32S/13E-30N01 Pier Ave Shallow Alluvium 10/28/1983 6.00 Flush Top Flush Mount 13.53 7.53
32S/13E-30N01 Pier Ave Shallow Alluvium 5/6/1982 4.03 Flush Top Flush Mount 13.53 9.50
32S/13E-30N01 Pier Ave Shallow Alluvium 10/20/1981 6.18 Flush Top Flush Mount 13.53 7.35
32S/13E-30N01 Pier Ave Shallow Alluvium 4/21/1981 5.35 Flush Top Flush Mount 13.53 8.18
32S/13E-30N01 Pier Ave Shallow Alluvium 10/10/1980 5.95 Flush Top Flush Mount 13.53 7.58
32S/13E-30N01 Pier Ave Shallow Alluvium 5/9/1980 4.97 Flush Top Flush Mount 13.53 8.56
32S/13E-30N01 Pier Ave Shallow Alluvium 11/7/1979 5.89 Flush Top Flush Mount 13.53 7.64
32S/13E-30N01 Pier Ave Shallow Alluvium 4/17/1979 5.63 Flush Top Flush Mount 13.53 7.90
32S/13E-30N01 Pier Ave Shallow Alluvium 12/4/1978 5.64 Flush Top Flush Mount 13.53 7.89
32S/13E-30N01 Pier Ave Shallow Alluvium 4/24/1978 5.25 Flush Top Flush Mount 13.53 8.28
32S/13E-30N01 Pier Ave Shallow Alluvium 11/7/1977 6.16 Flush Top Flush Mount 13.53 7.37
32S/13E-30N01 Pier Ave Shallow Alluvium 5/17/1977 6.41 Flush Top Flush Mount 13.53 7.12
32S/13E-30N01 Pier Ave Shallow Alluvium 6/7/1976 6.52 Flush Top Flush Mount 13.53 7.01
32S/13E-30N01 Pier Ave Shallow Alluvium 5/21/1976 6.50 Flush Top Flush Mount 13.53 7.03
32S/13E-30N01 Pier Ave Shallow Alluvium 1/14/1976 6.15 Flush Top Flush Mount 13.53 7.38
32S/13E-30N01 Pier Ave Shallow Alluvium 7/7/1975 6.33 Flush Top Flush Mount 13.53 7.20
32S/13E-30N01 Pier Ave Shallow Alluvium 4/1/1975 6.18 Flush Top Flush Mount 13.53 7.35
32S/13E-30N01 Pier Ave Shallow Alluvium 6/7/1974 6.12 Flush Top Flush Mount 13.53 7.41
32S/13E-30N01 Pier Ave Shallow Alluvium 9/20/1973 6.75 Flush Top Flush Mount 13.53 6.78
32S/13E-30N01 Pier Ave Shallow Alluvium 6/29/1972 6.48 Flush Top Flush Mount 13.53 7.05
32S/13E-30N01 Pier Ave Shallow Alluvium 2/29/1972 6.80 Flush Top Flush Mount 13.53 6.73
32S/13E-30N01 Pier Ave Shallow Alluvium 11/29/1971 6.31 Flush Top Flush Mount 13.53 7.22
32S/13E-30N01 Pier Ave Shallow Alluvium 8/26/1971 6.23 Flush Top Flush Mount 13.53 7.30
32S/13E-30N01 Pier Ave Shallow Alluvium 6/2/1971 6.12 Flush Top Flush Mount 13.53 7.41
32S/13E-30N01 Pier Ave Shallow Alluvium 3/2/1971 5.49 Flush Top Flush Mount 13.53 8.04
32S/13E-30N01 Pier Ave Shallow Alluvium 12/15/1970 5.73 Flush Top Flush Mount 13.53 7.80
32S/13E-30N01 Pier Ave Shallow Alluvium 5/22/1969 6.28 Flush Top Flush Mount 13.53 7.25
32S/13E-30N01 Pier Ave Shallow Alluvium 4/18/1969 5.94 Flush Top Flush Mount 13.53 7.59
32S/13E-30N01 Pier Ave Shallow Alluvium 3/20/1969 5.42 Flush Top Flush Mount 13.53 8.11
32S/13E-30N01 Pier Ave Shallow Alluvium 2/21/1969 4.96 Flush Top Flush Mount 13.53 8.57
32S/13E-30N01 Pier Ave Shallow Alluvium 1/5/1969 6.66 Flush Top Flush Mount 13.53 6.87
32S/13E-30N01 Pier Ave Shallow Alluvium 12/12/1968 7.24 Flush Top Flush Mount 13.53 6.29
32S/13E-30N01 Pier Ave Shallow Alluvium 11/14/1968 7.46 Flush Top Flush Mount 13.53 6.07
32S/13E-30N01 Pier Ave Shallow Alluvium 10/17/1968 7.81 Flush Top Flush Mount 13.53 5.72
32S/13E-30N01 Pier Ave Shallow Alluvium 9/14/1968 7.88 Flush Top Flush Mount 13.53 5.65
32S/13E-30N01 Pier Ave Shallow Alluvium 8/13/1968 7.50 Flush Top Flush Mount 13.53 6.03
32S/13E-30N01 Pier Ave Shallow Alluvium 3/21/1968 6.15 Flush Top Flush Mount 13.53 7.38
32S/13E-30N01 Pier Ave Shallow Alluvium 2/22/1968 6.23 Flush Top Flush Mount 13.53 7.30
32S/13E-30N01 Pier Ave Shallow Alluvium 1/17/1968 6.68 Flush Top Flush Mount 13.53 6.85
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 145
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N01 Pier Ave Shallow Alluvium 12/8/1967 6.45 Flush Top Flush Mount 13.53 7.08
32S/13E-30N01 Pier Ave Shallow Alluvium 11/13/1967 7.02 Flush Top Flush Mount 13.53 6.51
32S/13E-30N01 Pier Ave Shallow Alluvium 10/9/1967 7.30 Flush Top Flush Mount 13.53 6.23
32S/13E-30N01 Pier Ave Shallow Alluvium 9/5/1967 7.18 Flush Top Flush Mount 13.53 6.35
32S/13E-30N01 Pier Ave Shallow Alluvium 8/8/1967 7.04 Flush Top Flush Mount 13.53 6.49
32S/13E-30N01 Pier Ave Shallow Alluvium 7/12/1967 7.02 Flush Top Flush Mount 13.53 6.51
32S/13E-30N01 Pier Ave Shallow Alluvium 6/1/1967 6.75 Flush Top Flush Mount 13.53 6.78
32S/13E-30N01 Pier Ave Shallow Alluvium 5/2/1967 6.40 Flush Top Flush Mount 13.53 7.13
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Item 11.a. - Page 146
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N03 Pier Ave Middle Paso Robles 10/7/2020 9.00 Stove Pipe Top of Steel 16.13 7.13
32S/13E-30N03 Pier Ave Middle Paso Robles 7/6/2020 8.37 Stove Pipe Top of Steel 16.13 7.76
32S/13E-30N03 Pier Ave Middle Paso Robles 4/7/2020 7.42 Stove Pipe Top of Steel 16.13 8.71
32S/13E-30N03 Pier Ave Middle Paso Robles 1/7/2020 7.89 Stove Pipe Top of Steel 16.13 8.24
32S/13E-30N03 Pier Ave Middle Paso Robles 10/9/2019 8.29 Stove Pipe Top of Steel 16.13 7.84
32S/13E-30N03 Pier Ave Middle Paso Robles 7/9/2019 8.35 Stove Pipe Top of Steel 16.13 7.78
32S/13E-30N03 Pier Ave Middle Paso Robles 4/9/2019 8.25 Stove Pipe Top of Steel 16.13 7.88
32S/13E-30N03 Pier Ave Middle Paso Robles 1/8/2019 7.90 Stove Pipe Top of Steel 16.13 8.23
32S/13E-30N03 Pier Ave Middle Paso Robles 10/9/2018 8.37 Stove Pipe Top of Steel 16.13 7.76
32S/13E-30N03 Pier Ave Middle Paso Robles 7/10/2018 9.12 Stove Pipe Top of Steel 16.13 7.01
32S/13E-30N03 Pier Ave Middle Paso Robles 4/10/2018 7.50 Stove Pipe Top of Steel 16.13 8.63
32S/13E-30N03 Pier Ave Middle Paso Robles 1/10/2018 7.61 Stove Pipe Top of Steel 16.13 8.52
32S/13E-30N03 Pier Ave Middle Paso Robles 10/10/2017 8.61 Stove Pipe Top of Steel 16.13 7.52
32S/13E-30N03 Pier Ave Middle Paso Robles 7/11/2017 8.84 Stove Pipe Top of Steel 16.13 7.29
32S/13E-30N03 Pier Ave Middle Paso Robles 4/11/2017 7.55 Stove Pipe Top of Steel 16.13 8.58
32S/13E-30N03 Pier Ave Middle Paso Robles 1/10/2017 7.11 Stove Pipe Top of Steel 16.13 9.02
32S/13E-30N03 Pier Ave Middle Paso Robles 10/12/2016 10.13 Stove Pipe Top of Steel 16.13 6.00
32S/13E-30N03 Pier Ave Middle Paso Robles 7/19/2016 10.62 Stove Pipe Top of Steel 16.13 5.51
32S/13E-30N03 Pier Ave Middle Paso Robles 4/12/2016 9.21 Stove Pipe Top of Steel 16.13 6.92
32S/13E-30N03 Pier Ave Middle Paso Robles 1/12/2016 7.98 Stove Pipe Top of Steel 16.13 8.15
32S/13E-30N03 Pier Ave Middle Paso Robles 10/13/2015 10.48 Stove Pipe Top of Steel 16.13 5.65
32S/13E-30N03 Pier Ave Middle Paso Robles 7/14/2015 10.88 Stove Pipe Top of Steel 16.13 5.25
32S/13E-30N03 Pier Ave Middle Paso Robles 4/14/2015 11.88 Stove Pipe Top of Steel 16.13 4.25
32S/13E-30N03 Pier Ave Middle Paso Robles 1/13/2015 9.40 Stove Pipe Top of Steel 16.13 6.73
32S/13E-30N03 Pier Ave Middle Paso Robles 10/14/2014 10.52 Stove Pipe Top of Steel 16.13 5.61
32S/13E-30N03 Pier Ave Middle Paso Robles 7/29/2014 10.22 Stove Pipe Top of Steel 16.13 5.91
32S/13E-30N03 Pier Ave Middle Paso Robles 6/4/2014 11.33 Stove Pipe Top of Steel 16.13 4.80
32S/13E-30N03 Pier Ave Middle Paso Robles 4/15/2014 9.31 Stove Pipe Top of Steel 16.13 6.82
32S/13E-30N03 Pier Ave Middle Paso Robles 1/14/2014 10.26 Stove Pipe Top of Steel 16.13 5.87
32S/13E-30N03 Pier Ave Middle Paso Robles 10/14/2013 10.72 Stove Pipe Top of Steel 16.13 5.41
32S/13E-30N03 Pier Ave Middle Paso Robles 7/9/2013 10.36 Stove Pipe Top of Steel 16.13 5.77
32S/13E-30N03 Pier Ave Middle Paso Robles 4/10/2013 8.26 Stove Pipe Top of Steel 16.13 7.87
32S/13E-30N03 Pier Ave Middle Paso Robles 1/14/2013 7.71 Stove Pipe Top of Steel 16.13 8.42
32S/13E-30N03 Pier Ave Middle Paso Robles 10/29/2012 8.01 Stove Pipe Top of Steel 16.13 8.12
32S/13E-30N03 Pier Ave Middle Paso Robles 7/23/2012 9.15 Stove Pipe Top of Steel 16.13 6.98
32S/13E-30N03 Pier Ave Middle Paso Robles 4/18/2012 6.72 Stove Pipe Top of Steel 16.13 9.41
32S/13E-30N03 Pier Ave Middle Paso Robles 1/11/2012 7.17 Stove Pipe Top of Steel 16.13 8.96
32S/13E-30N03 Pier Ave Middle Paso Robles 11/21/2011 6.45 Stove Pipe Top of Steel 16.13 9.68
32S/13E-30N03 Pier Ave Middle Paso Robles 7/26/2011 7.59 Stove Pipe Top of Steel 16.13 8.54
32S/13E-30N03 Pier Ave Middle Paso Robles 4/20/2011 6.65 Stove Pipe Top of Steel 16.13 9.48
32S/13E-30N03 Pier Ave Middle Paso Robles 1/24/2011 6.68 Stove Pipe Top of Steel 16.13 9.45
32S/13E-30N03 Pier Ave Middle Paso Robles 10/21/2010 10.76 Stove Pipe Top of Steel 16.13 5.37
32S/13E-30N03 Pier Ave Middle Paso Robles 7/27/2010 9.53 Stove Pipe Top of Steel 16.13 6.60
32S/13E-30N03 Pier Ave Middle Paso Robles 4/27/2010 5.26 Flush Top Flush Mount 13.53 8.27
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 147
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N03 Pier Ave Middle Paso Robles 1/26/2010 5.88 Flush Top Flush Mount 13.53 7.65
32S/13E-30N03 Pier Ave Middle Paso Robles 10/20/2009 6.56 Flush Top Flush Mount 13.53 6.97
32S/13E-30N03 Pier Ave Middle Paso Robles 8/20/2009 7.50 Flush Top Flush Mount 13.53 6.03
32S/13E-30N03 Pier Ave Middle Paso Robles 5/12/2009 6.33 Flush Top Flush Mount 13.53 7.20
32S/13E-30N03 Pier Ave Middle Paso Robles 4/15/2008 5.50 Flush Top Flush Mount 13.53 8.03
32S/13E-30N03 Pier Ave Middle Paso Robles 10/18/2007 8.15 Flush Top Flush Mount 13.53 5.38
32S/13E-30N03 Pier Ave Middle Paso Robles 4/17/2007 5.50 Flush Top Flush Mount 13.53 8.03
32S/13E-30N03 Pier Ave Middle Paso Robles 10/19/2006 5.47 Flush Top Flush Mount 13.53 8.06
32S/13E-30N03 Pier Ave Middle Paso Robles 4/25/2006 3.25 Flush Top Flush Mount 13.53 10.28
32S/13E-30N03 Pier Ave Middle Paso Robles 10/7/2005 6.15 Flush Top Flush Mount 13.53 7.38
32S/13E-30N03 Pier Ave Middle Paso Robles 4/29/2005 5.42 Flush Top Flush Mount 13.53 8.11
32S/13E-30N03 Pier Ave Middle Paso Robles 10/27/2004 6.70 Flush Top Flush Mount 13.53 6.83
32S/13E-30N03 Pier Ave Middle Paso Robles 4/8/2004 4.90 Flush Top Flush Mount 13.53 8.63
32S/13E-30N03 Pier Ave Middle Paso Robles 10/8/2003 3.20 Flush Top Flush Mount 13.53 10.33
32S/13E-30N03 Pier Ave Middle Paso Robles 10/14/2002 7.10 Flush Top Flush Mount 13.53 6.43
32S/13E-30N03 Pier Ave Middle Paso Robles 4/9/2002 4.60 Flush Top Flush Mount 13.53 8.93
32S/13E-30N03 Pier Ave Middle Paso Robles 10/5/2001 5.00 Flush Top Flush Mount 13.53 8.53
32S/13E-30N03 Pier Ave Middle Paso Robles 4/23/2001 3.20 Flush Top Flush Mount 13.53 10.33
32S/13E-30N03 Pier Ave Middle Paso Robles 10/16/2000 4.80 Flush Top Flush Mount 13.53 8.73
32S/13E-30N03 Pier Ave Middle Paso Robles 4/24/2000 4.10 Flush Top Flush Mount 13.53 9.43
32S/13E-30N03 Pier Ave Middle Paso Robles 10/28/1999 5.80 Flush Top Flush Mount 13.53 7.73
32S/13E-30N03 Pier Ave Middle Paso Robles 4/15/1999 3.35 Flush Top Flush Mount 13.53 10.18
32S/13E-30N03 Pier Ave Middle Paso Robles 10/20/1998 3.50 Flush Top Flush Mount 13.53 10.03
32S/13E-30N03 Pier Ave Middle Paso Robles 4/22/1998 1.20 Flush Top Flush Mount 13.53 12.33
32S/13E-30N03 Pier Ave Middle Paso Robles 10/22/1997 4.93 Flush Top Flush Mount 13.53 8.60
32S/13E-30N03 Pier Ave Middle Paso Robles 4/29/1997 4.60 Flush Top Flush Mount 13.53 8.93
32S/13E-30N03 Pier Ave Middle Paso Robles 10/23/1996 5.05 Flush Top Flush Mount 13.53 8.48
32S/13E-30N03 Pier Ave Middle Paso Robles 4/29/1996 3.70 Flush Top Flush Mount 13.53 9.83
32S/13E-30N03 Pier Ave Middle Paso Robles 10/10/1995 4.70 Flush Top Flush Mount 13.53 8.83
32S/13E-30N03 Pier Ave Middle Paso Robles 4/19/1995 3.10 Flush Top Flush Mount 13.53 10.43
32S/13E-30N03 Pier Ave Middle Paso Robles 11/1/1994 7.20 Flush Top Flush Mount 13.53 6.33
32S/13E-30N03 Pier Ave Middle Paso Robles 4/11/1994 4.88 Flush Top Flush Mount 13.53 8.65
32S/13E-30N03 Pier Ave Middle Paso Robles 10/13/1993 5.98 Flush Top Flush Mount 13.53 7.55
32S/13E-30N03 Pier Ave Middle Paso Robles 4/8/1993 3.35 Flush Top Flush Mount 13.53 10.18
32S/13E-30N03 Pier Ave Middle Paso Robles 11/4/1992 6.40 Flush Top Flush Mount 13.53 7.13
32S/13E-30N03 Pier Ave Middle Paso Robles 4/21/1992 4.51 Flush Top Flush Mount 13.53 9.02
32S/13E-30N03 Pier Ave Middle Paso Robles 10/11/1991 6.59 Flush Top Flush Mount 13.53 6.94
32S/13E-30N03 Pier Ave Middle Paso Robles 4/11/1991 7.14 Flush Top Flush Mount 13.53 6.39
32S/13E-30N03 Pier Ave Middle Paso Robles 10/11/1990 7.61 Flush Top Flush Mount 13.53 5.92
32S/13E-30N03 Pier Ave Middle Paso Robles 4/24/1990 5.89 Flush Top Flush Mount 13.53 7.64
32S/13E-30N03 Pier Ave Middle Paso Robles 10/4/1989 6.54 Flush Top Flush Mount 13.53 6.99
32S/13E-30N03 Pier Ave Middle Paso Robles 4/17/1989 6.65 Flush Top Flush Mount 13.53 6.88
32S/13E-30N03 Pier Ave Middle Paso Robles 10/20/1988 7.29 Flush Top Flush Mount 13.53 6.24
32S/13E-30N03 Pier Ave Middle Paso Robles 4/28/1988 6.45 Flush Top Flush Mount 13.53 7.08
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 148
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N03 Pier Ave Middle Paso Robles 4/21/1988 6.45 Flush Top Flush Mount 13.53 7.08
32S/13E-30N03 Pier Ave Middle Paso Robles 10/19/1987 7.12 Flush Top Flush Mount 13.53 6.41
32S/13E-30N03 Pier Ave Middle Paso Robles 4/13/1987 5.09 Flush Top Flush Mount 13.53 8.44
32S/13E-30N03 Pier Ave Middle Paso Robles 11/5/1986 5.06 Flush Top Flush Mount 13.53 8.47
32S/13E-30N03 Pier Ave Middle Paso Robles 4/15/1986 5.61 Flush Top Flush Mount 13.53 7.92
32S/13E-30N03 Pier Ave Middle Paso Robles 4/22/1985 4.80 Flush Top Flush Mount 13.53 8.73
32S/13E-30N03 Pier Ave Middle Paso Robles 10/24/1984 5.70 Flush Top Flush Mount 13.53 7.83
32S/13E-30N03 Pier Ave Middle Paso Robles 10/28/1982 3.04 Flush Top Flush Mount 13.53 10.49
32S/13E-30N03 Pier Ave Middle Paso Robles 5/6/1982 5.53 Flush Top Flush Mount 13.53 8.00
32S/13E-30N03 Pier Ave Middle Paso Robles 10/20/1981 5.23 Flush Top Flush Mount 13.53 8.30
32S/13E-30N03 Pier Ave Middle Paso Robles 4/21/1981 3.09 Flush Top Flush Mount 13.53 10.44
32S/13E-30N03 Pier Ave Middle Paso Robles 10/10/1980 4.70 Flush Top Flush Mount 13.53 8.83
32S/13E-30N03 Pier Ave Middle Paso Robles 5/9/1980 5.30 Flush Top Flush Mount 13.53 8.23
32S/13E-30N03 Pier Ave Middle Paso Robles 11/7/1979 3.85 Flush Top Flush Mount 13.53 9.68
32S/13E-30N03 Pier Ave Middle Paso Robles 4/17/1979 4.48 Flush Top Flush Mount 13.53 9.05
32S/13E-30N03 Pier Ave Middle Paso Robles 12/4/1978 3.25 Flush Top Flush Mount 13.53 10.28
32S/13E-30N03 Pier Ave Middle Paso Robles 4/24/1978 3.32 Flush Top Flush Mount 13.53 10.21
32S/13E-30N03 Pier Ave Middle Paso Robles 11/7/1977 6.67 Flush Top Flush Mount 13.53 6.86
32S/13E-30N03 Pier Ave Middle Paso Robles 5/17/1977 6.67 Flush Top Flush Mount 13.53 6.86
32S/13E-30N03 Pier Ave Middle Paso Robles 6/7/1976 6.28 Flush Top Flush Mount 13.53 7.25
32S/13E-30N03 Pier Ave Middle Paso Robles 5/21/1976 6.07 Flush Top Flush Mount 13.53 7.46
32S/13E-30N03 Pier Ave Middle Paso Robles 1/14/1976 5.00 Flush Top Flush Mount 13.53 8.53
32S/13E-30N03 Pier Ave Middle Paso Robles 7/7/1975 5.00 Flush Top Flush Mount 13.53 8.53
32S/13E-30N03 Pier Ave Middle Paso Robles 4/1/1975 4.00 Flush Top Flush Mount 13.53 9.53
32S/13E-30N03 Pier Ave Middle Paso Robles 6/7/1974 4.00 Flush Top Flush Mount 13.53 9.53
32S/13E-30N03 Pier Ave Middle Paso Robles 9/20/1973 5.00 Flush Top Flush Mount 13.53 8.53
32S/13E-30N03 Pier Ave Middle Paso Robles 6/29/1972 11.00 Flush Top Flush Mount 13.53 2.53
32S/13E-30N03 Pier Ave Middle Paso Robles 2/29/1972 3.00 Flush Top Flush Mount 13.53 10.53
32S/13E-30N03 Pier Ave Middle Paso Robles 11/29/1971 5.81 Flush Top Flush Mount 13.53 7.72
32S/13E-30N03 Pier Ave Middle Paso Robles 8/26/1971 6.00 Flush Top Flush Mount 13.53 7.53
32S/13E-30N03 Pier Ave Middle Paso Robles 6/2/1971 6.00 Flush Top Flush Mount 13.53 7.53
32S/13E-30N03 Pier Ave Middle Paso Robles 3/2/1971 4.62 Flush Top Flush Mount 13.53 8.91
32S/13E-30N03 Pier Ave Middle Paso Robles 12/15/1970 6.03 Flush Top Flush Mount 13.53 7.50
32S/13E-30N03 Pier Ave Middle Paso Robles 6/24/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N03 Pier Ave Middle Paso Robles 5/22/1969 7.00 Flush Top Flush Mount 13.53 6.53
32S/13E-30N03 Pier Ave Middle Paso Robles 4/18/1969 6.23 Flush Top Flush Mount 13.53 7.30
32S/13E-30N03 Pier Ave Middle Paso Robles 3/20/1969 5.24 Flush Top Flush Mount 13.53 8.29
32S/13E-30N03 Pier Ave Middle Paso Robles 2/21/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N03 Pier Ave Middle Paso Robles 1/15/1969 8.24 Flush Top Flush Mount 13.53 5.29
32S/13E-30N03 Pier Ave Middle Paso Robles 12/12/1968 7.82 Flush Top Flush Mount 13.53 5.71
32S/13E-30N03 Pier Ave Middle Paso Robles 11/14/1968 9.05 Flush Top Flush Mount 13.53 4.48
32S/13E-30N03 Pier Ave Middle Paso Robles 10/17/1968 10.07 Flush Top Flush Mount 13.53 3.46
32S/13E-30N03 Pier Ave Middle Paso Robles 9/14/1968 10.77 Flush Top Flush Mount 13.53 2.76
32S/13E-30N03 Pier Ave Middle Paso Robles 8/23/1968 11.59 Flush Top Flush Mount 13.53 1.94
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 149
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N03 Pier Ave Middle Paso Robles 4/20/1968 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N03 Pier Ave Middle Paso Robles 3/21/1968 8.64 Flush Top Flush Mount 13.53 4.89
32S/13E-30N03 Pier Ave Middle Paso Robles 2/22/1968 7.20 Flush Top Flush Mount 13.53 6.33
32S/13E-30N03 Pier Ave Middle Paso Robles 1/17/1968 7.67 Flush Top Flush Mount 13.53 5.86
32S/13E-30N03 Pier Ave Middle Paso Robles 12/8/1967 6.95 Flush Top Flush Mount 13.53 6.58
32S/13E-30N03 Pier Ave Middle Paso Robles 11/13/1967 9.03 Flush Top Flush Mount 13.53 4.50
32S/13E-30N03 Pier Ave Middle Paso Robles 10/9/1967 8.05 Flush Top Flush Mount 13.53 5.48
32S/13E-30N03 Pier Ave Middle Paso Robles 9/5/1967 8.07 Flush Top Flush Mount 13.53 5.46
32S/13E-30N03 Pier Ave Middle Paso Robles 8/8/1967 9.14 Flush Top Flush Mount 13.53 4.39
32S/13E-30N03 Pier Ave Middle Paso Robles 7/12/1967 8.92 Flush Top Flush Mount 13.53 4.61
32S/13E-30N03 Pier Ave Middle Paso Robles 6/1/1967 6.70 Flush Top Flush Mount 13.53 6.83
32S/13E-30N03 Pier Ave Middle Paso Robles 5/2/1967 6.15 Flush Top Flush Mount 13.53 7.38
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 150
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N02 Pier Ave Deep Paso Robles 10/7/2020 11.33 Stove Pipe Top of Steel 16.13 4.80
32S/13E-30N02 Pier Ave Deep Paso Robles 7/6/2020 9.18 Stove Pipe Top of Steel 16.13 6.95
32S/13E-30N02 Pier Ave Deep Paso Robles 4/7/2020 5.01 Stove Pipe Top of Steel 16.13 11.12
32S/13E-30N02 Pier Ave Deep Paso Robles 1/7/2020 5.92 Stove Pipe Top of Steel 16.13 10.21
32S/13E-30N02 Pier Ave Deep Paso Robles 10/9/2019 10.00 Stove Pipe Top of Steel 16.13 6.13
32S/13E-30N02 Pier Ave Deep Paso Robles 7/9/2019 8.05 Stove Pipe Top of Steel 16.13 8.08
32S/13E-30N02 Pier Ave Deep Paso Robles 4/9/2019 5.23 Stove Pipe Top of Steel 16.13 10.90
32S/13E-30N02 Pier Ave Deep Paso Robles 1/8/2019 7.60 Stove Pipe Top of Steel 16.13 8.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/9/2018 10.77 Stove Pipe Top of Steel 16.13 5.36
32S/13E-30N02 Pier Ave Deep Paso Robles 7/10/2018 10.23 Stove Pipe Top of Steel 16.13 5.90
32S/13E-30N02 Pier Ave Deep Paso Robles 4/10/2018 5.96 Stove Pipe Top of Steel 16.13 10.17
32S/13E-30N02 Pier Ave Deep Paso Robles 1/10/2018 7.43 Stove Pipe Top of Steel 16.13 8.70
32S/13E-30N02 Pier Ave Deep Paso Robles 10/10/2017 10.40 Stove Pipe Top of Steel 16.13 5.73
32S/13E-30N02 Pier Ave Deep Paso Robles 7/11/2017 8.38 Stove Pipe Top of Steel 16.13 7.75
32S/13E-30N02 Pier Ave Deep Paso Robles 4/11/2017 5.35 Stove Pipe Top of Steel 16.13 10.78
32S/13E-30N02 Pier Ave Deep Paso Robles 1/10/2017 7.34 Stove Pipe Top of Steel 16.13 8.79
32S/13E-30N02 Pier Ave Deep Paso Robles 10/12/2016 13.44 Stove Pipe Top of Steel 16.13 2.69
32S/13E-30N02 Pier Ave Deep Paso Robles 7/19/2016 12.40 Stove Pipe Top of Steel 16.13 3.73
32S/13E-30N02 Pier Ave Deep Paso Robles 4/12/2016 8.57 Stove Pipe Top of Steel 16.13 7.56
32S/13E-30N02 Pier Ave Deep Paso Robles 1/12/2016 7.48 Stove Pipe Top of Steel 16.13 8.65
32S/13E-30N02 Pier Ave Deep Paso Robles 10/13/2015 14.14 Stove Pipe Top of Steel 16.13 1.99
32S/13E-30N02 Pier Ave Deep Paso Robles 7/14/2015 13.55 Stove Pipe Top of Steel 16.13 2.58
32S/13E-30N02 Pier Ave Deep Paso Robles 4/14/2015 10.02 Stove Pipe Top of Steel 16.13 6.11
32S/13E-30N02 Pier Ave Deep Paso Robles 1/13/2015 7.85 Stove Pipe Top of Steel 16.13 8.28
32S/13E-30N02 Pier Ave Deep Paso Robles 10/14/2014 13.69 Stove Pipe Top of Steel 16.13 2.44
32S/13E-30N02 Pier Ave Deep Paso Robles 7/29/2014 13.27 Stove Pipe Top of Steel 16.13 2.86
32S/13E-30N02 Pier Ave Deep Paso Robles 6/4/2014 15.20 Stove Pipe Top of Steel 16.13 0.93
32S/13E-30N02 Pier Ave Deep Paso Robles 5/5/2014 13.19 Stove Pipe Top of Steel 16.13 2.94
32S/13E-30N02 Pier Ave Deep Paso Robles 4/15/2014 8.57 Stove Pipe Top of Steel 16.13 7.56
32S/13E-30N02 Pier Ave Deep Paso Robles 1/14/2014 9.30 Stove Pipe Top of Steel 16.13 6.83
32S/13E-30N02 Pier Ave Deep Paso Robles 10/14/2013 12.13 Stove Pipe Top of Steel 16.13 4.00
32S/13E-30N02 Pier Ave Deep Paso Robles 7/9/2013 11.05 Stove Pipe Top of Steel 16.13 5.08
32S/13E-30N02 Pier Ave Deep Paso Robles 4/10/2013 7.06 Stove Pipe Top of Steel 16.13 9.07
32S/13E-30N02 Pier Ave Deep Paso Robles 1/14/2013 4.98 Stove Pipe Top of Steel 16.13 11.15
32S/13E-30N02 Pier Ave Deep Paso Robles 10/29/2012 8.52 Stove Pipe Top of Steel 16.13 7.61
32S/13E-30N02 Pier Ave Deep Paso Robles 7/23/2012 8.31 Stove Pipe Top of Steel 16.13 7.82
32S/13E-30N02 Pier Ave Deep Paso Robles 4/18/2012 3.45 Stove Pipe Top of Steel 16.13 12.68
32S/13E-30N02 Pier Ave Deep Paso Robles 1/11/2012 4.88 Stove Pipe Top of Steel 16.13 11.25
32S/13E-30N02 Pier Ave Deep Paso Robles 11/21/2011 5.35 Stove Pipe Top of Steel 16.13 10.78
32S/13E-30N02 Pier Ave Deep Paso Robles 7/26/2011 7.25 Stove Pipe Top of Steel 16.13 8.88
32S/13E-30N02 Pier Ave Deep Paso Robles 4/20/2011 3.53 Flush Top Flush Mount 13.53 10.00
32S/13E-30N02 Pier Ave Deep Paso Robles 1/24/2011 3.67 Flush Top Flush Mount 13.53 9.86
32S/13E-30N02 Pier Ave Deep Paso Robles 10/21/2010 10.42 Flush Top Flush Mount 13.53 3.11
32S/13E-30N02 Pier Ave Deep Paso Robles 7/27/2010 10.02 Flush Top Flush Mount 13.53 3.51
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 151
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N02 Pier Ave Deep Paso Robles 4/27/2010 6.14 Flush Top Flush Mount 13.53 7.39
32S/13E-30N02 Pier Ave Deep Paso Robles 2/25/2010 1.72 Flush Top Flush Mount 13.53 11.81
32S/13E-30N02 Pier Ave Deep Paso Robles 2/25/2010 1.72 Flush Top Flush Mount 13.53 11.81
32S/13E-30N02 Pier Ave Deep Paso Robles 1/26/2010 3.72 Flush Top Flush Mount 13.53 9.81
32S/13E-30N02 Pier Ave Deep Paso Robles 10/20/2009 7.38 Flush Top Flush Mount 13.53 6.15
32S/13E-30N02 Pier Ave Deep Paso Robles 8/20/2009 11.94 Flush Top Flush Mount 13.53 1.59
32S/13E-30N02 Pier Ave Deep Paso Robles 5/11/2009 6.98 Flush Top Flush Mount 13.53 6.55
32S/13E-30N02 Pier Ave Deep Paso Robles 10/15/2008 12.23 Flush Top Flush Mount 13.53 1.30
32S/13E-30N02 Pier Ave Deep Paso Robles 4/15/2008 5.60 Flush Top Flush Mount 13.53 7.93
32S/13E-30N02 Pier Ave Deep Paso Robles 10/18/2007 10.35 Flush Top Flush Mount 13.53 3.18
32S/13E-30N02 Pier Ave Deep Paso Robles 4/17/2007 6.80 Flush Top Flush Mount 13.53 6.73
32S/13E-30N02 Pier Ave Deep Paso Robles 10/19/2006 5.07 Flush Top Flush Mount 13.53 8.46
32S/13E-30N02 Pier Ave Deep Paso Robles 4/25/2006 0.35 Flush Top Flush Mount 13.53 13.18
32S/13E-30N02 Pier Ave Deep Paso Robles 10/7/2005 2.50 Flush Top Flush Mount 13.53 11.03
32S/13E-30N02 Pier Ave Deep Paso Robles 4/29/2005 1.80 Flush Top Flush Mount 13.53 11.73
32S/13E-30N02 Pier Ave Deep Paso Robles 10/27/2004 8.40 Flush Top Flush Mount 13.53 5.13
32S/13E-30N02 Pier Ave Deep Paso Robles 4/8/2004 3.90 Flush Top Flush Mount 13.53 9.63
32S/13E-30N02 Pier Ave Deep Paso Robles 10/17/2002 6.20 Flush Top Flush Mount 13.53 7.33
32S/13E-30N02 Pier Ave Deep Paso Robles 4/9/2002 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/5/2001 3.70 Flush Top Flush Mount 13.53 9.83
32S/13E-30N02 Pier Ave Deep Paso Robles 4/23/2001 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/16/2000 2.90 Flush Top Flush Mount 13.53 10.63
32S/13E-30N02 Pier Ave Deep Paso Robles 4/24/2000 1.90 Flush Top Flush Mount 13.53 11.63
32S/13E-30N02 Pier Ave Deep Paso Robles 10/28/1999 2.98 Flush Top Flush Mount 13.53 10.55
32S/13E-30N02 Pier Ave Deep Paso Robles 4/15/1999 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/20/1998 3.30 Flush Top Flush Mount 13.53 10.23
32S/13E-30N02 Pier Ave Deep Paso Robles 4/22/1998 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/22/1997 5.45 Flush Top Flush Mount 13.53 8.08
32S/13E-30N02 Pier Ave Deep Paso Robles 4/29/1997 5.19 Flush Top Flush Mount 13.53 8.34
32S/13E-30N02 Pier Ave Deep Paso Robles 10/23/1996 5.91 Flush Top Flush Mount 13.53 7.62
32S/13E-30N02 Pier Ave Deep Paso Robles 4/29/1996 3.10 Flush Top Flush Mount 13.53 10.43
32S/13E-30N02 Pier Ave Deep Paso Robles 10/10/1995 9.15 Flush Top Flush Mount 13.53 4.38
32S/13E-30N02 Pier Ave Deep Paso Robles 4/19/1995 1.60 Flush Top Flush Mount 13.53 11.93
32S/13E-30N02 Pier Ave Deep Paso Robles 11/1/1994 7.10 Flush Top Flush Mount 13.53 6.43
32S/13E-30N02 Pier Ave Deep Paso Robles 4/11/1994 3.61 Flush Top Flush Mount 13.53 9.92
32S/13E-30N02 Pier Ave Deep Paso Robles 10/13/1993 8.45 Flush Top Flush Mount 13.53 5.08
32S/13E-30N02 Pier Ave Deep Paso Robles 4/8/1993 1.31 Flush Top Flush Mount 13.53 12.22
32S/13E-30N02 Pier Ave Deep Paso Robles 11/4/1992 7.10 Flush Top Flush Mount 13.53 6.43
32S/13E-30N02 Pier Ave Deep Paso Robles 4/21/1992 3.27 Flush Top Flush Mount 13.53 10.26
32S/13E-30N02 Pier Ave Deep Paso Robles 10/11/1991 8.79 Flush Top Flush Mount 13.53 4.74
32S/13E-30N02 Pier Ave Deep Paso Robles 4/11/1991 7.14 Flush Top Flush Mount 13.53 6.39
32S/13E-30N02 Pier Ave Deep Paso Robles 10/11/1990 8.70 Flush Top Flush Mount 13.53 4.83
32S/13E-30N02 Pier Ave Deep Paso Robles 4/24/1990 5.40 Flush Top Flush Mount 13.53 8.13
32S/13E-30N02 Pier Ave Deep Paso Robles 10/4/1989 6.34 Flush Top Flush Mount 13.53 7.19
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 152
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N02 Pier Ave Deep Paso Robles 4/17/1989 4.48 Flush Top Flush Mount 13.53 9.05
32S/13E-30N02 Pier Ave Deep Paso Robles 10/20/1988 7.28 Flush Top Flush Mount 13.53 6.25
32S/13E-30N02 Pier Ave Deep Paso Robles 4/29/1988 2.72 Flush Top Flush Mount 13.53 10.81
32S/13E-30N02 Pier Ave Deep Paso Robles 4/21/1988 3.78 Flush Top Flush Mount 13.53 9.75
32S/13E-30N02 Pier Ave Deep Paso Robles 10/19/1987 6.10 Flush Top Flush Mount 13.53 7.43
32S/13E-30N02 Pier Ave Deep Paso Robles 4/13/1987 1.22 Flush Top Flush Mount 13.53 12.31
32S/13E-30N02 Pier Ave Deep Paso Robles 11/5/1986 4.85 Flush Top Flush Mount 13.53 8.68
32S/13E-30N02 Pier Ave Deep Paso Robles 4/15/1986 0.88 Flush Top Flush Mount 13.53 12.65
32S/13E-30N02 Pier Ave Deep Paso Robles 4/22/1985 0.07 Flush Top Flush Mount 13.53 13.46
32S/13E-30N02 Pier Ave Deep Paso Robles 10/24/1984 3.38 Flush Top Flush Mount 13.53 10.15
32S/13E-30N02 Pier Ave Deep Paso Robles 10/28/1983 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 5/6/1982 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/20/1981 3.54 Flush Top Flush Mount 13.53 9.99
32S/13E-30N02 Pier Ave Deep Paso Robles 4/21/1981 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 10/10/1980 2.48 Flush Top Flush Mount 13.53 11.05
32S/13E-30N02 Pier Ave Deep Paso Robles 5/9/1980 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 11/7/1979 1.73 Flush Top Flush Mount 13.53 11.80
32S/13E-30N02 Pier Ave Deep Paso Robles 4/17/1979 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 12/4/1978 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 4/24/1978 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 11/7/1977 4.89 Flush Top Flush Mount 13.53 8.64
32S/13E-30N02 Pier Ave Deep Paso Robles 5/17/1977 2.80 Flush Top Flush Mount 13.53 10.73
32S/13E-30N02 Pier Ave Deep Paso Robles 6/7/1976 4.70 Flush Top Flush Mount 13.53 8.83
32S/13E-30N02 Pier Ave Deep Paso Robles 5/21/1976 3.79 Flush Top Flush Mount 13.53 9.74
32S/13E-30N02 Pier Ave Deep Paso Robles 11/14/1975 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 7/7/1975 2.53 Flush Top Flush Mount 13.53 11.00
32S/13E-30N02 Pier Ave Deep Paso Robles 4/1/1975 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 6/7/1974 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 9/20/1973 1.03 Flush Top Flush Mount 13.53 12.50
32S/13E-30N02 Pier Ave Deep Paso Robles 6/29/1972 4.35 Flush Top Flush Mount 13.53 9.18
32S/13E-30N02 Pier Ave Deep Paso Robles 2/29/1972 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 11/29/1971 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 8/26/1971 3.00 Flush Top Flush Mount 13.53 10.53
32S/13E-30N02 Pier Ave Deep Paso Robles 6/2/1971 0.88 Flush Top Flush Mount 13.53 12.65
32S/13E-30N02 Pier Ave Deep Paso Robles 3/2/1971 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 12/15/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 6/24/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 5/22/1969 1.48 Flush Top Flush Mount 13.53 12.05
32S/13E-30N02 Pier Ave Deep Paso Robles 4/18/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 3/20/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 2/21/1969 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 1/15/1969 2.41 Flush Top Flush Mount 13.53 11.12
32S/13E-30N02 Pier Ave Deep Paso Robles 12/12/1968 4.12 Flush Top Flush Mount 13.53 9.41
32S/13E-30N02 Pier Ave Deep Paso Robles 11/14/1968 5.48 Flush Top Flush Mount 13.53 8.05
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 153
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-30N02 Pier Ave Deep Paso Robles 10/17/1968 8.06 Flush Top Flush Mount 13.53 5.47
32S/13E-30N02 Pier Ave Deep Paso Robles 9/14/1968 9.22 Flush Top Flush Mount 13.53 4.31
32S/13E-30N02 Pier Ave Deep Paso Robles 8/13/1968 8.47 Flush Top Flush Mount 13.53 5.06
32S/13E-30N02 Pier Ave Deep Paso Robles 4/20/1968 0.00 Flush Top Flush Mount 13.53 13.53
32S/13E-30N02 Pier Ave Deep Paso Robles 3/21/1968 1.37 Flush Top Flush Mount 13.53 12.16
32S/13E-30N02 Pier Ave Deep Paso Robles 2/22/1968 0.74 Flush Top Flush Mount 13.53 12.79
32S/13E-30N02 Pier Ave Deep Paso Robles 1/17/1968 1.02 Flush Top Flush Mount 13.53 12.51
32S/13E-30N02 Pier Ave Deep Paso Robles 12/8/1967 2.14 Flush Top Flush Mount 13.53 11.39
32S/13E-30N02 Pier Ave Deep Paso Robles 11/13/1967 4.04 Flush Top Flush Mount 13.53 9.49
32S/13E-30N02 Pier Ave Deep Paso Robles 10/9/1967 4.46 Flush Top Flush Mount 13.53 9.07
32S/13E-30N02 Pier Ave Deep Paso Robles 9/5/1967 5.03 Flush Top Flush Mount 13.53 8.50
32S/13E-30N02 Pier Ave Deep Paso Robles 8/8/1967 4.71 Flush Top Flush Mount 13.53 8.82
32S/13E-30N02 Pier Ave Deep Paso Robles 7/12/1967 1.77 Flush Top Flush Mount 13.53 11.76
32S/13E-30N02 Pier Ave Deep Paso Robles 6/1/1967 1.90 Flush Top Flush Mount 13.53 11.63
32S/13E-30N02 Pier Ave Deep Paso Robles 5/2/1967 0.00 Flush Top Flush Mount 13.53 13.53
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 154
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H10 Oceano Green Paso Robles 10/7/2020 28.77 Manhole Top Flush Mount 34.63 5.86
32S/13E-31H10 Oceano Green Paso Robles 7/6/2020 25.99 Manhole Top Flush Mount 34.63 8.64
32S/13E-31H10 Oceano Green Paso Robles 4/7/2020 22.54 Manhole Top Flush Mount 34.63 12.09
32S/13E-31H10 Oceano Green Paso Robles 1/7/2020 24.03 Manhole Top Flush Mount 34.63 10.60
32S/13E-31H10 Oceano Green Paso Robles 10/9/2019 27.50 Manhole Top Flush Mount 34.63 7.13
32S/13E-31H10 Oceano Green Paso Robles 7/9/2019 28.68 Manhole Top Flush Mount 34.63 5.95
32S/13E-31H10 Oceano Green Paso Robles 4/9/2019 22.35 Manhole Top Flush Mount 34.63 12.28
32S/13E-31H10 Oceano Green Paso Robles 1/8/2019 24.48 Manhole Top Flush Mount 34.63 10.15
32S/13E-31H10 Oceano Green Paso Robles 10/9/2018 27.35 Manhole Top Flush Mount 34.63 7.28
32S/13E-31H10 Oceano Green Paso Robles 7/10/2018 27.94 Manhole Top Flush Mount 34.63 6.69
32S/13E-31H10 Oceano Green Paso Robles 4/10/2018 24.15 Manhole Top Flush Mount 34.63 10.48
32S/13E-31H10 Oceano Green Paso Robles 1/10/2018 24.15 Manhole Top Flush Mount 34.63 10.48
32S/13E-31H10 Oceano Green Paso Robles 10/10/2017 26.53 Manhole Top Flush Mount 34.63 8.10
32S/13E-31H10 Oceano Green Paso Robles 7/11/2017 25.11 Manhole Top Flush Mount 34.63 9.52
32S/13E-31H10 Oceano Green Paso Robles 4/11/2017 21.98 Manhole Top Flush Mount 34.63 12.65
32S/13E-31H10 Oceano Green Paso Robles 1/10/2017 24.50 Manhole Top Flush Mount 34.63 10.13
32S/13E-31H10 Oceano Green Paso Robles 10/12/2016 30.74 Manhole Top Flush Mount 34.63 3.89
32S/13E-31H10 Oceano Green Paso Robles 7/19/2016 29.77 Manhole Top Flush Mount 34.63 4.86
32S/13E-31H10 Oceano Green Paso Robles 4/12/2016 25.64 Manhole Top Flush Mount 34.63 8.99
32S/13E-31H10 Oceano Green Paso Robles 1/12/2016 20.83 Manhole Top of Casing 30.49 9.66
32S/13E-31H10 Oceano Green Paso Robles 10/13/2015 31.88 Manhole Top Flush Mount 34.63 2.75
32S/13E-31H10 Oceano Green Paso Robles 7/14/2015 31.61 Manhole Top Flush Mount 34.63 3.02
32S/13E-31H10 Oceano Green Paso Robles 4/14/2015 28.81 Manhole Top Flush Mount 34.63 5.82
32S/13E-31H10 Oceano Green Paso Robles 1/13/2015 26.11 Manhole Top Flush Mount 34.63 8.52
32S/13E-31H10 Oceano Green Paso Robles 10/14/2014 31.64 Manhole Top Flush Mount 34.63 2.99
32S/13E-31H10 Oceano Green Paso Robles 7/29/2014 32.30 Manhole Top Flush Mount 34.63 2.33
32S/13E-31H10 Oceano Green Paso Robles 6/4/2014 32.82 Manhole Top Flush Mount 34.63 1.81
32S/13E-31H10 Oceano Green Paso Robles 4/15/2014 27.98 Manhole Top Flush Mount 34.63 6.65
32S/13E-31H10 Oceano Green Paso Robles 1/14/2014 28.55 Manhole Top Flush Mount 34.63 6.08
32S/13E-31H10 Oceano Green Paso Robles 10/14/2013 30.31 Manhole Top Flush Mount 34.63 4.32
32S/13E-31H10 Oceano Green Paso Robles 7/9/2013 29.98 Manhole Top Flush Mount 34.63 4.65
32S/13E-31H10 Oceano Green Paso Robles 4/10/2013 23.30 Manhole Top Flush Mount 34.63 11.33
32S/13E-31H10 Oceano Green Paso Robles 1/14/2013 23.59 Manhole Top Flush Mount 34.63 11.04
32S/13E-31H10 Oceano Green Paso Robles 10/30/2012 27.31 Manhole Top Flush Mount 34.63 7.32
32S/13E-31H10 Oceano Green Paso Robles 7/25/2012 27.15 Manhole Top Flush Mount 34.63 7.48
32S/13E-31H10 Oceano Green Paso Robles 4/18/2012 21.65 Manhole Top Flush Mount 34.63 12.98
32S/13E-31H10 Oceano Green Paso Robles 1/12/2012 23.29 Manhole Top Flush Mount 34.63 11.34
32S/13E-31H10 Oceano Green Paso Robles 11/21/2011 22.46 Manhole Top Flush Mount 34.63 12.17
32S/13E-31H10 Oceano Green Paso Robles 7/26/2011 25.51 Manhole Top Flush Mount 34.63 9.12
32S/13E-31H10 Oceano Green Paso Robles 4/20/2011 114.79 Manhole Top Flush Mount 34.63 -80.16
32S/13E-31H10 Oceano Green Paso Robles 1/24/2011 106.59 Manhole Top Flush Mount 34.63 -71.96
32S/13E-31H10 Oceano Green Paso Robles 10/21/2010 112.71 Manhole Top of Casing 30.49 -82.22
32S/13E-31H10 Oceano Green Paso Robles 7/26/2010 95.61 Manhole Top of Casing 30.49 -65.12
32S/13E-31H10 Oceano Green Paso Robles 4/26/2010 63.90 Manhole Top of Casing 30.49 -33.41
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 155
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H10 Oceano Green Paso Robles 1/27/2010 43.71 Manhole Top of Casing 30.49 -13.22
32S/13E-31H10 Oceano Green Paso Robles 10/20/2009 29.20 Manhole Top of Casing 30.49 1.29
32S/13E-31H10 Oceano Green Paso Robles 8/19/2009 24.55 Manhole Top of Casing 30.49 5.94
32S/13E-31H10 Oceano Green Paso Robles 4/7/2009 28.12 Manhole Top of Casing 30.49 2.37
32S/13E-31H10 Oceano Green Paso Robles 10/15/2008 27.84 Manhole Top of Casing 30.49 2.65
32S/13E-31H10 Oceano Green Paso Robles 4/16/2008 26.82 Manhole Top of Casing 30.49 3.67
32S/13E-31H10 Oceano Green Paso Robles 10/18/2007 27.10 Manhole Top of Casing 30.49 3.39
32S/13E-31H10 Oceano Green Paso Robles 4/18/2007 25.15 Manhole Top of Casing 30.49 5.34
32S/13E-31H10 Oceano Green Paso Robles 10/16/2006 25.40 Manhole Top of Casing 30.49 5.09
32S/13E-31H10 Oceano Green Paso Robles 4/11/2006 25.60 Manhole Top of Casing 30.49 4.89
32S/13E-31H10 Oceano Green Paso Robles 10/31/2005 26.50 Manhole Top of Casing 30.49 3.99
32S/13E-31H10 Oceano Green Paso Robles 10/5/2001 20.10 Manhole Top of Casing 30.49 10.39
32S/13E-31H10 Oceano Green Paso Robles 4/25/2001 20.00 Manhole Top of Casing 30.49 10.49
32S/13E-31H10 Oceano Green Paso Robles 10/4/2000 20.90 Manhole Top of Casing 30.49 9.59
32S/13E-31H10 Oceano Green Paso Robles 4/14/2000 16.10 Manhole Top of Casing 30.49 14.39
32S/13E-31H10 Oceano Green Paso Robles 10/27/1999 21.40 Manhole Top of Casing 30.49 9.09
32S/13E-31H10 Oceano Green Paso Robles 10/23/1998 19.80 Manhole Top of Casing 30.49 10.69
32S/13E-31H10 Oceano Green Paso Robles 10/21/1998 19.50 Manhole Top of Casing 30.49 10.99
32S/13E-31H10 Oceano Green Paso Robles 4/28/1997 20.30 Manhole Top of Casing 30.49 10.19
32S/13E-31H10 Oceano Green Paso Robles 4/16/1996 20.70 Manhole Top of Casing 30.49 9.79
32S/13E-31H10 Oceano Green Paso Robles 10/4/1995 211.90 Manhole Top of Casing 30.49 -181.41
32S/13E-31H10 Oceano Green Paso Robles 4/7/1995 22.50 Manhole Top of Casing 30.49 7.99
32S/13E-31H10 Oceano Green Paso Robles 4/13/1994 20.20 Manhole Top of Casing 30.49 10.29
32S/13E-31H10 Oceano Green Paso Robles 10/5/1993 21.10 Manhole Top of Casing 30.49 9.39
32S/13E-31H10 Oceano Green Paso Robles 4/6/1993 19.73 Manhole Top of Casing 30.49 10.76
32S/13E-31H10 Oceano Green Paso Robles 10/14/1992 23.69 Manhole Top of Casing 30.49 6.8
32S/13E-31H10 Oceano Green Paso Robles 4/15/1992 24.20 Manhole Top of Casing 30.49 6.29
32S/13E-31H10 Oceano Green Paso Robles 10/7/1991 26.10 Manhole Top of Casing 30.49 4.39
32S/13E-31H10 Oceano Green Paso Robles 4/4/1991 25.50 Manhole Top of Casing 30.49 4.99
32S/13E-31H10 Oceano Green Paso Robles 10/4/1990 25.70 Manhole Top of Casing 30.49 4.79
32S/13E-31H10 Oceano Green Paso Robles 4/11/1990 23.00 Manhole Top of Casing 30.49 7.49
32S/13E-31H10 Oceano Green Paso Robles 10/4/1989 24.60 Manhole Top of Casing 30.49 5.89
32S/13E-31H10 Oceano Green Paso Robles 10/3/1984 21.90 Manhole Top of Casing 30.49 8.59
32S/13E-31H10 Oceano Green Paso Robles 10/14/1983 17.55 Manhole Top of Casing 30.49 12.94
32S/13E-31H10 Oceano Green Paso Robles 5/16/1983 15.80 Manhole Top of Casing 30.49 14.69
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 156
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H11 Oceano Blue Paso Robles 10/7/2020 29.71 Manhole Top Flush Mount 34.63 4.92
32S/13E-31H11 Oceano Blue Paso Robles 7/6/2020 27.07 Manhole Top Flush Mount 34.63 7.56
32S/13E-31H11 Oceano Blue Paso Robles 4/7/2020 22.42 Manhole Top Flush Mount 34.63 12.21
32S/13E-31H11 Oceano Blue Paso Robles 1/7/2020 23.73 Manhole Top Flush Mount 34.63 10.9
32S/13E-31H11 Oceano Blue Paso Robles 10/9/2019 28.31 Manhole Top Flush Mount 34.63 6.32
32S/13E-31H11 Oceano Blue Paso Robles 7/9/2019 26.69 Manhole Top Flush Mount 34.63 7.94
32S/13E-31H11 Oceano Blue Paso Robles 4/9/2019 22.61 Manhole Top Flush Mount 34.63 12.02
32S/13E-31H11 Oceano Blue Paso Robles 1/8/2019 25.18 Manhole Top Flush Mount 34.63 9.45
32S/13E-31H11 Oceano Blue Paso Robles 10/9/2018 28.82 Manhole Top Flush Mount 34.63 5.81
32S/13E-31H11 Oceano Blue Paso Robles 7/10/2018 28.60 Manhole Top Flush Mount 34.63 6.03
32S/13E-31H11 Oceano Blue Paso Robles 4/10/2018 23.98 Manhole Top Flush Mount 34.63 10.65
32S/13E-31H11 Oceano Blue Paso Robles 1/10/2018 25.08 Manhole Top Flush Mount 34.63 9.55
32S/13E-31H11 Oceano Blue Paso Robles 10/10/2017 28.03 Manhole Top Flush Mount 34.63 6.6
32S/13E-31H11 Oceano Blue Paso Robles 7/11/2017 26.18 Manhole Top Flush Mount 34.63 8.45
32S/13E-31H11 Oceano Blue Paso Robles 4/11/2017 21.90 Manhole Top Flush Mount 34.63 12.73
32S/13E-31H11 Oceano Blue Paso Robles 1/10/2017 25.00 Manhole Top Flush Mount 34.63 9.63
32S/13E-31H11 Oceano Blue Paso Robles 10/12/2016 30.74 Manhole Top Flush Mount 34.63 3.89
32S/13E-31H11 Oceano Blue Paso Robles 7/19/2016 29.62 Manhole Top Flush Mount 34.63 5.01
32S/13E-31H11 Oceano Blue Paso Robles 4/12/2016 25.13 Manhole Top Flush Mount 34.63 9.50
32S/13E-31H11 Oceano Blue Paso Robles 1/12/2016 22.00 Manhole Top of Casing 30.54 8.54
32S/13E-31H11 Oceano Blue Paso Robles 10/13/2015 32.70 Manhole Top Flush Mount 34.63 1.93
32S/13E-31H11 Oceano Blue Paso Robles 7/14/2015 32.21 Manhole Top Flush Mount 34.63 2.42
32S/13E-31H11 Oceano Blue Paso Robles 4/14/2015 28.41 Manhole Top Flush Mount 34.63 6.22
32S/13E-31H11 Oceano Blue Paso Robles 1/13/2015 25.98 Manhole Top Flush Mount 34.63 8.65
32S/13E-31H11 Oceano Blue Paso Robles 10/14/2014 32.70 Manhole Top Flush Mount 34.63 1.93
32S/13E-31H11 Oceano Blue Paso Robles 7/29/2014 32.69 Manhole Top Flush Mount 34.63 1.94
32S/13E-31H11 Oceano Blue Paso Robles 6/4/2014 34.02 Manhole Top Flush Mount 34.63 0.61
32S/13E-31H11 Oceano Blue Paso Robles 4/15/2014 27.07 Manhole Top Flush Mount 34.63 7.56
32S/13E-31H11 Oceano Blue Paso Robles 1/14/2014 27.86 Manhole Top Flush Mount 34.63 6.77
32S/13E-31H11 Oceano Blue Paso Robles 10/14/2013 30.98 Manhole Top Flush Mount 34.63 3.65
32S/13E-31H11 Oceano Blue Paso Robles 7/9/2013 29.36 Manhole Top Flush Mount 34.63 5.27
32S/13E-31H11 Oceano Blue Paso Robles 4/10/2013 24.45 Manhole Top Flush Mount 34.63 10.18
32S/13E-31H11 Oceano Blue Paso Robles 1/14/2013 23.14 Manhole Top Flush Mount 34.63 11.49
32S/13E-31H11 Oceano Blue Paso Robles 10/30/2012 27.68 Manhole Top Flush Mount 34.63 6.95
32S/13E-31H11 Oceano Blue Paso Robles 7/25/2012 27.18 Manhole Top Flush Mount 34.63 7.45
32S/13E-31H11 Oceano Blue Paso Robles 4/18/2012 20.10 Manhole Top Flush Mount 34.63 14.53
32S/13E-31H11 Oceano Blue Paso Robles 1/12/2012 22.26 Manhole Top Flush Mount 34.63 12.37
32S/13E-31H11 Oceano Blue Paso Robles 11/21/2011 22.73 Manhole Top Flush Mount 34.63 11.90
32S/13E-31H11 Oceano Blue Paso Robles 7/26/2011 25.29 Manhole Top Flush Mount 34.63 9.34
32S/13E-31H11 Oceano Blue Paso Robles 4/20/2011 22.59 Manhole Top Flush Mount 34.63 12.04
32S/13E-31H11 Oceano Blue Paso Robles 1/24/2011 24.87 Manhole Top Flush Mount 34.63 9.76
32S/13E-31H11 Oceano Blue Paso Robles 10/21/2010 30.11 Manhole Top of Casing 30.54 0.43
32S/13E-31H11 Oceano Blue Paso Robles 7/26/2010 24.74 Manhole Top of Casing 30.54 5.80
32S/13E-31H11 Oceano Blue Paso Robles 4/26/2010 18.52 Manhole Top of Casing 30.54 12.02
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 157
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H11 Oceano Blue Paso Robles 1/27/2010 22.06 Manhole Top of Casing 30.54 8.48
32S/13E-31H11 Oceano Blue Paso Robles 10/20/2009 27.50 Manhole Top of Casing 30.54 3.04
32S/13E-31H11 Oceano Blue Paso Robles 8/19/2009 24.65 Manhole Top of Casing 30.54 5.89
32S/13E-31H11 Oceano Blue Paso Robles 4/7/2009 27.65 Manhole Top of Casing 30.54 2.89
32S/13E-31H11 Oceano Blue Paso Robles 10/15/2008 29.29 Manhole Top of Casing 30.54 1.25
32S/13E-31H11 Oceano Blue Paso Robles 4/16/2008 26.98 Manhole Top of Casing 30.54 3.56
32S/13E-31H11 Oceano Blue Paso Robles 10/18/2007 28.20 Manhole Top of Casing 30.54 2.34
32S/13E-31H11 Oceano Blue Paso Robles 4/18/2007 24.75 Manhole Top of Casing 30.54 5.79
32S/13E-31H11 Oceano Blue Paso Robles 10/16/2006 25.60 Manhole Top of Casing 30.54 4.94
32S/13E-31H11 Oceano Blue Paso Robles 4/11/2006 24.10 Manhole Top of Casing 30.54 6.44
32S/13E-31H11 Oceano Blue Paso Robles 10/31/2005 26.35 Manhole Top of Casing 30.54 4.19
32S/13E-31H11 Oceano Blue Paso Robles 10/5/2001 18.20 Manhole Top of Casing 30.54 12.34
32S/13E-31H11 Oceano Blue Paso Robles 4/25/2001 16.80 Manhole Top of Casing 30.54 13.74
32S/13E-31H11 Oceano Blue Paso Robles 10/4/2000 19.10 Manhole Top of Casing 30.54 11.44
32S/13E-31H11 Oceano Blue Paso Robles 4/14/2000 12.40 Manhole Top of Casing 30.54 18.14
32S/13E-31H11 Oceano Blue Paso Robles 10/27/1999 17.10 Manhole Top of Casing 30.54 13.44
32S/13E-31H11 Oceano Blue Paso Robles 10/21/1998 16.20 Manhole Top of Casing 30.54 14.34
32S/13E-31H11 Oceano Blue Paso Robles 4/23/1998 14.70 Manhole Top of Casing 30.54 15.84
32S/13E-31H11 Oceano Blue Paso Robles 10/22/1997 23.20 Manhole Top of Casing 30.54 7.34
32S/13E-31H11 Oceano Blue Paso Robles 4/28/1997 18.00 Manhole Top of Casing 30.54 12.54
32S/13E-31H11 Oceano Blue Paso Robles 4/16/1996 17.90 Manhole Top of Casing 30.54 12.64
32S/13E-31H11 Oceano Blue Paso Robles 10/4/1995 20.00 Manhole Top of Casing 30.54 10.54
32S/13E-31H11 Oceano Blue Paso Robles 4/7/1995 16.60 Manhole Top of Casing 30.54 13.94
32S/13E-31H11 Oceano Blue Paso Robles 4/13/1994 20.90 Manhole Top of Casing 30.54 9.64
32S/13E-31H11 Oceano Blue Paso Robles 10/5/1993 21.80 Manhole Top of Casing 30.54 8.74
32S/13E-31H11 Oceano Blue Paso Robles 4/6/1993 18.92 Manhole Top of Casing 30.54 11.62
32S/13E-31H11 Oceano Blue Paso Robles 10/14/1992 25.46 Manhole Top of Casing 30.54 5.08
32S/13E-31H11 Oceano Blue Paso Robles 4/14/1992 21.90 Manhole Top of Casing 30.54 8.64
32S/13E-31H11 Oceano Blue Paso Robles 10/7/1991 25.30 Manhole Top of Casing 30.54 5.24
32S/13E-31H11 Oceano Blue Paso Robles 4/4/1991 24.10 Manhole Top of Casing 30.54 6.44
32S/13E-31H11 Oceano Blue Paso Robles 10/4/1990 27.00 Manhole Top of Casing 30.54 3.54
32S/13E-31H11 Oceano Blue Paso Robles 4/11/1990 22.50 Manhole Top of Casing 30.54 8.04
32S/13E-31H11 Oceano Blue Paso Robles 10/4/1989 23.70 Manhole Top of Casing 30.54 6.84
32S/13E-31H11 Oceano Blue Paso Robles 10/13/1984 23.30 Manhole Top of Casing 30.54 7.24
32S/13E-31H11 Oceano Blue Paso Robles 10/3/1984 23.30 Manhole Top of Casing 30.54 7.24
32S/13E-31H11 Oceano Blue Paso Robles 10/14/1983 16.18 Manhole Top of Casing 30.54 14.36
32S/13E-31H11 Oceano Blue Paso Robles 5/16/1983 13.30 Manhole Top of Casing 30.54 17.24
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 158
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H12 Oceano Silver Careaga 10/7/2020 28.34 Manhole Top Flush Mount 34.63 6.29
32S/13E-31H12 Oceano Silver Careaga 7/6/2020 24.92 Manhole Top Flush Mount 34.63 9.71
32S/13E-31H12 Oceano Silver Careaga 4/7/2020 21.35 Manhole Top Flush Mount 34.63 13.28
32S/13E-31H12 Oceano Silver Careaga 1/7/2020 22.71 Manhole Top Flush Mount 34.63 11.92
32S/13E-31H12 Oceano Silver Careaga 10/9/2019 26.50 Manhole Top Flush Mount 34.63 8.13
32S/13E-31H12 Oceano Silver Careaga 7/9/2019 24.59 Manhole Top Flush Mount 34.63 10.04
32S/13E-31H12 Oceano Silver Careaga 4/9/2019 27.90 Manhole Top Flush Mount 34.63 6.73
32S/13E-31H12 Oceano Silver Careaga 1/8/2019 28.15 Manhole Top Flush Mount 34.63 6.48
32S/13E-31H12 Oceano Silver Careaga 10/9/2018 39.15 Manhole Top Flush Mount 34.63 -4.52
32S/13E-31H12 Oceano Silver Careaga 7/10/2018 28.92 Manhole Top Flush Mount 34.63 5.71
32S/13E-31H12 Oceano Silver Careaga 4/10/2018 23.50 Manhole Top Flush Mount 34.63 11.13
32S/13E-31H12 Oceano Silver Careaga 1/10/2018 23.90 Manhole Top Flush Mount 34.63 10.73
32S/13E-31H12 Oceano Silver Careaga 10/10/2017 28.06 Manhole Top Flush Mount 34.63 6.57
32S/13E-31H12 Oceano Silver Careaga 7/11/2017 24.09 Manhole Top Flush Mount 34.63 10.54
32S/13E-31H12 Oceano Silver Careaga 4/11/2017 21.14 Manhole Top Flush Mount 34.63 13.49
32S/13E-31H12 Oceano Silver Careaga 1/10/2017 24.80 Manhole Top Flush Mount 34.63 9.83
32S/13E-31H12 Oceano Silver Careaga 10/12/2016 31.00 Manhole Top Flush Mount 34.63 3.63
32S/13E-31H12 Oceano Silver Careaga 7/19/2016 26.95 Manhole Top of Casing 30.48 3.53
32S/13E-31H12 Oceano Silver Careaga 4/12/2016 25.32 Manhole Top Flush Mount 34.63 9.31
32S/13E-31H12 Oceano Silver Careaga 1/12/2016 21.44 Manhole Top of Casing 30.48 9.04
32S/13E-31H12 Oceano Silver Careaga 10/13/2015 32.30 Manhole Top Flush Mount 34.63 2.33
32S/13E-31H12 Oceano Silver Careaga 7/14/2015 32.58 Manhole Top Flush Mount 34.63 2.05
32S/13E-31H12 Oceano Silver Careaga 4/14/2015 30.38 Manhole Top Flush Mount 34.63 4.25
32S/13E-31H12 Oceano Silver Careaga 1/13/2015 26.19 Manhole Top Flush Mount 34.63 8.44
32S/13E-31H12 Oceano Silver Careaga 10/14/2014 43.01 Manhole Top Flush Mount 34.63 -8.38
32S/13E-31H12 Oceano Silver Careaga 7/29/2014 33.65 Manhole Top Flush Mount 34.63 0.98
32S/13E-31H12 Oceano Silver Careaga 6/4/2014 36.33 Manhole Top Flush Mount 34.63 -1.70
32S/13E-31H12 Oceano Silver Careaga 4/15/2014 42.20 Manhole Top Flush Mount 34.63 -7.57
32S/13E-31H12 Oceano Silver Careaga 1/14/2014 27.78 Manhole Top Flush Mount 34.63 6.85
32S/13E-31H12 Oceano Silver Careaga 10/14/2013 30.92 Manhole Top Flush Mount 34.63 3.71
32S/13E-31H12 Oceano Silver Careaga 7/9/2013 30.91 Manhole Top Flush Mount 34.63 3.72
32S/13E-31H12 Oceano Silver Careaga 4/10/2013 26.08 Manhole Top Flush Mount 34.63 8.55
32S/13E-31H12 Oceano Silver Careaga 1/14/2013 23.12 Manhole Top Flush Mount 34.63 11.51
32S/13E-31H12 Oceano Silver Careaga 10/30/2012 27.14 Manhole Top Flush Mount 34.63 7.49
32S/13E-31H12 Oceano Silver Careaga 7/25/2012 27.68 Manhole Top Flush Mount 34.63 6.95
32S/13E-31H12 Oceano Silver Careaga 4/18/2012 20.13 Manhole Top Flush Mount 34.63 14.5
32S/13E-31H12 Oceano Silver Careaga 1/11/2012 23.00 Manhole Top Flush Mount 34.63 11.63
32S/13E-31H12 Oceano Silver Careaga 11/21/2011 22.85 Manhole Top Flush Mount 34.63 11.78
32S/13E-31H12 Oceano Silver Careaga 7/26/2011 25.23 Manhole Top Flush Mount 34.63 9.4
32S/13E-31H12 Oceano Silver Careaga 4/20/2011 21.27 Manhole Top Flush Mount 34.63 13.36
32S/13E-31H12 Oceano Silver Careaga 1/24/2011 22.02 Manhole Top Flush Mount 34.63 12.61
32S/13E-31H12 Oceano Silver Careaga 10/21/2010 29.11 Manhole Top Flush Mount 34.63 5.52
32S/13E-31H12 Oceano Silver Careaga 7/26/2010 24.24 Manhole Well Casing 30.48 6.24
32S/13E-31H12 Oceano Silver Careaga 4/26/2010 19.04 Manhole Well Casing 30.48 11.44
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 159
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H12 Oceano Silver Careaga 1/27/2010 21.05 Manhole Well Casing 30.48 9.43
32S/13E-31H12 Oceano Silver Careaga 10/20/2009 27.52 Manhole Well Casing 30.48 2.96
32S/13E-31H12 Oceano Silver Careaga 8/19/2009 29.34 Manhole Well Casing 30.48 1.14
32S/13E-31H12 Oceano Silver Careaga 4/7/2009 31.32 Manhole Well Casing 30.48 -0.84
32S/13E-31H12 Oceano Silver Careaga 10/15/2008 41.62 Manhole Well Casing 30.48 -11.14
32S/13E-31H12 Oceano Silver Careaga 4/16/2008 29.70 Manhole Well Casing 30.48 0.78
32S/13E-31H12 Oceano Silver Careaga 10/19/2007 33.15 Manhole Well Casing 30.48 -2.67
32S/13E-31H12 Oceano Silver Careaga 4/18/2007 26.30 Manhole Well Casing 30.48 4.18
32S/13E-31H12 Oceano Silver Careaga 10/16/2006 27.30 Manhole Well Casing 30.48 3.18
32S/13E-31H12 Oceano Silver Careaga 4/11/2006 22.70 Manhole Well Casing 30.48 7.78
32S/13E-31H12 Oceano Silver Careaga 10/31/2005 30.10 Manhole Well Casing 30.48 0.38
32S/13E-31H12 Oceano Silver Careaga 10/5/2001 18.10 Manhole Well Casing 30.48 12.38
32S/13E-31H12 Oceano Silver Careaga 4/25/2001 15.90 Manhole Well Casing 30.48 14.58
32S/13E-31H12 Oceano Silver Careaga 10/4/2000 21.60 Manhole Well Casing 30.48 8.88
32S/13E-31H12 Oceano Silver Careaga 4/14/2000 17.00 Manhole Well Casing 30.48 13.48
32S/13E-31H12 Oceano Silver Careaga 10/27/1999 24.10 Manhole Well Casing 30.48 6.38
32S/13E-31H12 Oceano Silver Careaga 10/21/1998 26.60 Manhole Well Casing 30.48 3.88
32S/13E-31H12 Oceano Silver Careaga 4/23/1998 16.80 Manhole Well Casing 30.48 13.68
32S/13E-31H12 Oceano Silver Careaga 10/22/1997 32.20 Manhole Well Casing 30.48 -1.72
32S/13E-31H12 Oceano Silver Careaga 4/28/1997 33.50 Manhole Well Casing 30.48 -3.02
32S/13E-31H12 Oceano Silver Careaga 4/16/1996 29.20 Manhole Well Casing 30.48 1.28
32S/13E-31H12 Oceano Silver Careaga 10/4/1995 34.90 Manhole Well Casing 30.48 -4.42
32S/13E-31H12 Oceano Silver Careaga 4/7/1995 29.50 Manhole Well Casing 30.48 0.98
32S/13E-31H12 Oceano Silver Careaga 4/13/1994 35.30 Manhole Well Casing 30.48 -4.82
32S/13E-31H12 Oceano Silver Careaga 10/5/1993 28.30 Manhole Well Casing 30.48 2.18
32S/13E-31H12 Oceano Silver Careaga 4/6/1993 19.47 Manhole Well Casing 30.48 11.01
32S/13E-31H12 Oceano Silver Careaga 10/14/1992 30.34 Manhole Well Casing 30.48 0.14
32S/13E-31H12 Oceano Silver Careaga 4/14/1992 25.23 Manhole Well Casing 30.48 5.25
32S/13E-31H12 Oceano Silver Careaga 10/7/1991 30.50 Manhole Well Casing 30.48 -0.02
32S/13E-31H12 Oceano Silver Careaga 4/4/1991 23.12 Manhole Well Casing 30.48 7.36
32S/13E-31H12 Oceano Silver Careaga 10/4/1990 29.70 Manhole Well Casing 30.48 0.78
32S/13E-31H12 Oceano Silver Careaga 4/11/1990 44.00 Manhole Well Casing 30.48 -13.52
32S/13E-31H12 Oceano Silver Careaga 10/4/1989 25.80 Manhole Well Casing 30.48 4.68
32S/13E-31H12 Oceano Silver Careaga 10/3/1984 26.80 Manhole Well Casing 30.48 3.68
32S/13E-31H12 Oceano Silver Careaga 5/16/1983 13.50 Manhole Well Casing 30.48 16.98
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 160
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H13 Oceano Yellow Careaga 10/7/2020 28.13 Manhole Top Flush Mount 34.63 6.5
32S/13E-31H13 Oceano Yellow Careaga 7/6/2020 24.64 Manhole Top Flush Mount 34.63 9.99
32S/13E-31H13 Oceano Yellow Careaga 4/7/2020 21.03 Manhole Top Flush Mount 34.63 13.6
32S/13E-31H13 Oceano Yellow Careaga 1/7/2020 22.63 Manhole Top Flush Mount 34.63 12
32S/13E-31H13 Oceano Yellow Careaga 10/9/2019 26.35 Manhole Top Flush Mount 34.63 8.28
32S/13E-31H13 Oceano Yellow Careaga 7/9/2019 24.47 Manhole Top Flush Mount 34.63 10.16
32S/13E-31H13 Oceano Yellow Careaga 4/9/2019 28.05 Manhole Top Flush Mount 34.63 6.58
32S/13E-31H13 Oceano Yellow Careaga 1/8/2019 28.35 Manhole Top Flush Mount 34.63 6.28
32S/13E-31H13 Oceano Yellow Careaga 10/9/2018 37.38 Manhole Top Flush Mount 34.63 -2.75
32S/13E-31H13 Oceano Yellow Careaga 7/10/2018 28.90 Manhole Top Flush Mount 34.63 5.73
32S/13E-31H13 Oceano Yellow Careaga 4/10/2018 23.55 Manhole Top Flush Mount 34.63 11.08
32S/13E-31H13 Oceano Yellow Careaga 1/10/2018 23.85 Manhole Top Flush Mount 34.63 10.78
32S/13E-31H13 Oceano Yellow Careaga 10/10/2017 27.96 Manhole Top Flush Mount 34.63 6.67
32S/13E-31H13 Oceano Yellow Careaga 7/11/2017 23.68 Manhole Top Flush Mount 34.63 10.95
32S/13E-31H13 Oceano Yellow Careaga 4/11/2017 21.18 Manhole Top Flush Mount 34.63 13.45
32S/13E-31H13 Oceano Yellow Careaga 1/10/2017 24.79 Manhole Top Flush Mount 34.63 9.84
32S/13E-31H13 Oceano Yellow Careaga 10/12/2016 30.91 Manhole Top Flush Mount 34.63 3.72
32S/13E-31H13 Oceano Yellow Careaga 7/19/2016 29.58 Manhole Top Flush Mount 34.63 5.05
32S/13E-31H13 Oceano Yellow Careaga 4/12/2016 25.25 Manhole Top Flush Mount 34.63 9.38
32S/13E-31H13 Oceano Yellow Careaga 1/12/2016 21.66 Manhole Top of Casing 30.52 8.86
32S/13E-31H13 Oceano Yellow Careaga 10/13/2015 32.28 Manhole Top Flush Mount 34.63 2.35
32S/13E-31H13 Oceano Yellow Careaga 7/14/2015 32.60 Manhole Top Flush Mount 34.63 2.03
32S/13E-31H13 Oceano Yellow Careaga 4/14/2015 30.42 Manhole Top Flush Mount 34.63 4.21
32S/13E-31H13 Oceano Yellow Careaga 1/13/2015 26.32 Manhole Top Flush Mount 34.63 8.31
32S/13E-31H13 Oceano Yellow Careaga 10/14/2014 41.12 Manhole Top Flush Mount 34.63 -6.49
32S/13E-31H13 Oceano Yellow Careaga 7/29/2014 33.72 Manhole Top Flush Mount 34.63 0.91
32S/13E-31H13 Oceano Yellow Careaga 6/4/2014 36.55 Manhole Top Flush Mount 34.63 -1.92
32S/13E-31H13 Oceano Yellow Careaga 4/15/2014 39.06 Manhole Top Flush Mount 34.63 -4.43
32S/13E-31H13 Oceano Yellow Careaga 1/14/2014 27.80 Manhole Top Flush Mount 34.63 6.83
32S/13E-31H13 Oceano Yellow Careaga 10/14/2013 30.83 Manhole Top Flush Mount 34.63 3.80
32S/13E-31H13 Oceano Yellow Careaga 7/9/2013 30.41 Manhole Top Flush Mount 34.63 4.22
32S/13E-31H13 Oceano Yellow Careaga 4/10/2013 26.09 Manhole Top Flush Mount 34.63 8.54
32S/13E-31H13 Oceano Yellow Careaga 1/14/2013 23.25 Manhole Top Flush Mount 34.63 11.38
32S/13E-31H13 Oceano Yellow Careaga 10/30/2012 27.23 Manhole Top Flush Mount 34.63 7.40
32S/13E-31H13 Oceano Yellow Careaga 7/25/2012 27.69 Manhole Top Flush Mount 34.63 6.94
32S/13E-31H13 Oceano Yellow Careaga 4/18/2012 20.05 Manhole Top Flush Mount 34.63 14.58
32S/13E-31H13 Oceano Yellow Careaga 1/12/2012 23.08 Manhole Top Flush Mount 34.63 11.55
32S/13E-31H13 Oceano Yellow Careaga 11/21/2011 22.98 Manhole Top Flush Mount 34.63 11.65
32S/13E-31H13 Oceano Yellow Careaga 7/26/2011 26.73 Manhole Top Flush Mount 34.63 7.90
32S/13E-31H13 Oceano Yellow Careaga 4/20/2011 21.30 Manhole Top Flush Mount 34.63 13.33
32S/13E-31H13 Oceano Yellow Careaga 1/24/2011 22.01 Manhole Top Flush Mount 34.63 12.62
32S/13E-31H13 Oceano Yellow Careaga 10/21/2010 28.22 Manhole Well Casing 30.52 2.30
32S/13E-31H13 Oceano Yellow Careaga 7/26/2010 25.50 Manhole Well Casing 30.52 5.02
32S/13E-31H13 Oceano Yellow Careaga 4/26/2010 19.17 Manhole Well Casing 30.52 11.35
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 161
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
32S/13E-31H13 Oceano Yellow Careaga 1/27/2010 20.58 Manhole Well Casing 30.52 9.94
32S/13E-31H13 Oceano Yellow Careaga 10/20/2009 25.80 Manhole Well Casing 30.52 4.72
32S/13E-31H13 Oceano Yellow Careaga 8/19/2009 31.04 Manhole Well Casing 30.52 -0.52
32S/13E-31H13 Oceano Yellow Careaga 4/7/2009 34.78 Manhole Well Casing 30.52 -4.26
32S/13E-31H13 Oceano Yellow Careaga 10/15/2008 37.72 Manhole Well Casing 30.52 -7.20
32S/13E-31H13 Oceano Yellow Careaga 4/16/2008 29.80 Manhole Well Casing 30.52 0.72
32S/13E-31H13 Oceano Yellow Careaga 10/19/2007 33.95 Manhole Well Casing 30.52 -3.43
32S/13E-31H13 Oceano Yellow Careaga 4/18/2007 27.50 Manhole Well Casing 30.52 3.02
32S/13E-31H13 Oceano Yellow Careaga 10/16/2006 27.50 Manhole Well Casing 30.52 3.02
32S/13E-31H13 Oceano Yellow Careaga 4/11/2006 26.85 Manhole Well Casing 30.52 3.67
32S/13E-31H13 Oceano Yellow Careaga 10/31/2005 28.05 Manhole Well Casing 30.52 2.47
32S/13E-31H13 Oceano Yellow Careaga 10/5/2001 22.80 Manhole Well Casing 30.52 7.72
32S/13E-31H13 Oceano Yellow Careaga 4/25/2001 22.60 Manhole Well Casing 30.52 7.92
32S/13E-31H13 Oceano Yellow Careaga 10/4/2000 26.50 Manhole Well Casing 30.52 4.02
32S/13E-31H13 Oceano Yellow Careaga 10/27/1999 34.80 Manhole Well Casing 30.52 -4.28
32S/13E-31H13 Oceano Yellow Careaga 10/21/1998 24.80 Manhole Well Casing 30.52 5.72
32S/13E-31H13 Oceano Yellow Careaga 4/23/1998 21.60 Manhole Well Casing 30.52 8.92
32S/13E-31H13 Oceano Yellow Careaga 10/22/1997 30.20 Manhole Well Casing 30.52 0.32
32S/13E-31H13 Oceano Yellow Careaga 4/28/1997 25.60 Manhole Well Casing 30.52 4.92
32S/13E-31H13 Oceano Yellow Careaga 4/16/1996 23.80 Manhole Well Casing 30.52 6.72
32S/13E-31H13 Oceano Yellow Careaga 10/4/1995 25.90 Manhole Well Casing 30.52 4.62
32S/13E-31H13 Oceano Yellow Careaga 4/7/1995 22.40 Manhole Well Casing 30.52 8.12
32S/13E-31H13 Oceano Yellow Careaga 4/13/1994 26.50 Manhole Well Casing 30.52 4.02
32S/13E-31H13 Oceano Yellow Careaga 10/5/1993 31.10 Manhole Well Casing 30.52 -0.58
32S/13E-31H13 Oceano Yellow Careaga 4/6/1993 26.90 Manhole Well Casing 30.52 3.62
32S/13E-31H13 Oceano Yellow Careaga 10/14/1992 34.05 Manhole Well Casing 30.52 -3.53
32S/13E-31H13 Oceano Yellow Careaga 4/14/1992 24.90 Manhole Well Casing 30.52 5.62
32S/13E-31H13 Oceano Yellow Careaga 10/7/1991 31.20 Manhole Well Casing 30.52 -0.68
32S/13E-31H13 Oceano Yellow Careaga 4/4/1991 24.60 Manhole Well Casing 30.52 5.92
32S/13E-31H13 Oceano Yellow Careaga 10/4/1990 34.20 Manhole Well Casing 30.52 -3.68
32S/13E-31H13 Oceano Yellow Careaga 4/11/1990 26.10 Manhole Well Casing 30.52 4.42
32S/13E-31H13 Oceano Yellow Careaga 10/4/1989 30.40 Manhole Well Casing 30.52 0.12
32S/13E-31H13 Oceano Yellow Careaga 10/3/1984 26.60 Manhole Well Casing 30.52 3.92
32S/13E-31H13 Oceano Yellow Careaga 5/16/1983 14.30 Manhole Well Casing 30.52 16.22
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 162
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L01 Oceano Dunes Middle Paso Robles 10/7/2020 21.30 Stove Pipe Top of Steel 26.77 5.47
12N/36W-36L01 Oceano Dunes Middle Paso Robles 4/7/2020 18.35 Stove Pipe Top of Steel 26.77 8.42
12N/36W-36L01 Oceano Dunes Middle Paso Robles 1/7/2020 19.02 Stove Pipe Top of Steel 26.77 7.75
12N/36W-36L01 Oceano Dunes Middle Paso Robles 10/9/2019 20.85 Stove Pipe Top of Steel 26.77 5.92
12N/36W-36L01 Oceano Dunes Middle Paso Robles 7/9/2019 20.39 Stove Pipe Top of Steel 26.77 6.38
12N/36W-36L01 Oceano Dunes Middle Paso Robles 4/9/2019 19.93 Stove Pipe Top of Steel 26.77 6.84
12N/36W-36L01 Oceano Dunes Middle Paso Robles 1/8/2019 19.00 Stove Pipe Top of Steel 26.77 7.77
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/9/2018 20.80 Stove Pipe Top of Steel 26.77 5.97
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/10/2018 20.74 Stove Pipe Top of Steel 26.77 6.03
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/10/2018 19.11 Stove Pipe Top of Steel 26.77 7.66
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/10/2018 19.32 Stove Pipe Top of Steel 26.77 7.45
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/10/2017 21.23 Stove Pipe Top of Steel 26.77 5.54
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/11/2017 21.59 Stove Pipe Top of Steel 26.77 5.18
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/11/2017 19.38 Stove Pipe Top of Steel 26.77 7.39
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/10/2017 19.70 Stove Pipe Top of Steel 26.77 7.07
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/12/2016 21.86 Stove Pipe Top of Steel 26.77 4.91
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/19/2016 22.21 Stove Pipe Top of Steel 26.77 4.56
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/12/2016 20.56 Stove Pipe Top of Steel 26.77 6.21
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/12/2016 18.76 Stove Pipe Top of Steel 26.77 8.01
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/13/2015 22.14 Stove Pipe Top of Steel 26.77 4.63
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/14/2015 21.84 Stove Pipe Top of Steel 26.77 4.93
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/14/2015 21.18 Stove Pipe Top of Steel 26.77 5.59
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/13/2015 19.89 Stove Pipe Top of Steel 26.77 6.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/14/2014 21.75 Stove Pipe Top of Steel 26.77 5.02
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/29/2014 21.57 Stove Pipe Top of Steel 26.77 5.20
12N/36W-36L01 Oceano Dunes Middle Paso Robles
6/4/2014 22.36 Stove Pipe Top of Steel 26.77 4.41
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/15/2014 19.89 Stove Pipe Top of Steel 26.77 6.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/14/2014 20.38 Stove Pipe Top of Steel 26.77 6.39
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/14/2013 21.71 Stove Pipe Top of Steel 26.77 5.06
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/9/2013 21.37 Stove Pipe Top of Steel 26.77 5.4
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/10/2013 20.10 Stove Pipe Top of Steel 26.77 6.67
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/14/2013 18.62 Stove Pipe Top of Steel 26.77 8.15
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/31/2012 20.11 Stove Pipe Top of Steel 26.77 6.66
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/24/2012 19.42 Stove Pipe Top of Steel 26.77 7.35
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/20/2012 18.26 Stove Pipe Top of Steel 26.77 8.51
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/18/2012 23.83 Stove Pipe Top of Steel 26.77 2.94
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/11/2012 17.68 Stove Pipe Top of Steel 26.77 9.09
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/21/2011 18.08 Stove Pipe Top of Steel 26.77 8.69
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/26/2011 19.63 Stove Pipe Top of Steel 26.77 7.14
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/20/2011 18.26 Stove Pipe Top of Steel 26.77 8.51
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/24/2011 17.61 Stove Pipe Top of Steel 26.77 9.16
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/21/2010 20.75 Stove Pipe Top of Steel 26.77 6.02
12N/36W-36L01 Oceano Dunes Middle Paso Robles
7/27/2010 21.18 Stove Pipe Top of Steel 26.77 5.59
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/26/2010 15.94 Flush Top Flush Mount 23.98 8.04
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 163
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/21/2009 17.72 Flush Top Flush Mount 23.98 6.26
12N/36W-36L01 Oceano Dunes Middle Paso Robles
8/20/2009 19.16 Flush Top Flush Mount 23.98 4.82
12N/36W-36L01 Oceano Dunes Middle Paso Robles
5/11/2009 17.68 Flush Top Flush Mount 23.98 6.30
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/18/2009 15.95 Flush Top Flush Mount 23.98 8.03
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/23/2008 18.75 Flush Top Flush Mount 23.98 5.23
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/23/2008 16.87 Flush Top Flush Mount 23.98 7.11
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/18/2007 17.80 Flush Top Flush Mount 23.98 6.18
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/18/2007 16.45 Flush Top Flush Mount 23.98 7.53
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/12/2006 16.44 Flush Top Flush Mount 23.98 7.54
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/20/2006 15.40 Flush Top Flush Mount 23.98 8.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/28/2005 16.56 Flush Top Flush Mount 23.98 7.42
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/29/2005 16.60 Flush Top Flush Mount 23.98 7.38
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/15/2004 17.00 Flush Top Flush Mount 23.98 6.98
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/29/2004 15.00 Flush Top Flush Mount 23.98 8.98
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/28/2003 15.43 Flush Top Flush Mount 23.98 8.55
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/17/2002 17.20 Flush Top Flush Mount 23.98 6.78
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/18/2002 17.10 Flush Top Flush Mount 23.98 6.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/5/2001 15.70 Flush Top Flush Mount 23.98 8.28
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/24/2001 14.60 Flush Top Flush Mount 23.98 9.38
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/13/2000 15.50 Flush Top Flush Mount 23.98 8.48
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/28/2000 15.40 Flush Top Flush Mount 23.98 8.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/29/1998 16.32 Flush Top Flush Mount 23.98 7.66
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/26/1996 18.10 Flush Top Flush Mount 23.98 5.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/24/1996 17.40 Flush Top Flush Mount 23.98 6.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/19/1995 15.45 Flush Top Flush Mount 23.98 8.53
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/1/1994 18.40 Flush Top Flush Mount 23.98 5.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/11/1994 16.60 Flush Top Flush Mount 23.98 7.38
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/20/1993 17.55 Flush Top Flush Mount 23.98 6.43
12N/36W-36L01 Oceano Dunes Middle Paso Robles
5/3/1993 17.00 Flush Top Flush Mount 23.98 6.98
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/20/1993 16.30 Flush Top Flush Mount 23.98 7.68
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/4/1992 17.95 Flush Top Flush Mount 23.98 6.03
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/30/1992 16.80 Flush Top Flush Mount 23.98 7.18
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/11/1991 17.54 Flush Top Flush Mount 23.98 6.44
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/19/1991 17.78 Flush Top Flush Mount 23.98 6.20
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/11/1990 18.91 Flush Top Flush Mount 23.98 5.07
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/24/1990 17.38 Flush Top Flush Mount 23.98 6.60
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/12/1989 17.69 Flush Top Flush Mount 23.98 6.29
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/20/1989 17.02 Flush Top Flush Mount 23.98 6.96
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/25/1988 17.24 Flush Top Flush Mount 23.98 6.74
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/21/1988 17.42 Flush Top Flush Mount 23.98 6.56
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/19/1987 16.81 Flush Top Flush Mount 23.98 7.17
12N/36W-36L01 Oceano Dunes Middle Paso Robles
8/5/1987 18.00 Flush Top Flush Mount 23.98 5.98
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/13/1987 15.39 Flush Top Flush Mount 23.98 8.59
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/31/1986 16.10 Flush Top Flush Mount 23.98 7.88
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 164
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/27/1986 16.61 Flush Top Flush Mount 23.98 7.37
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/4/1985 15.90 Flush Top Flush Mount 23.98 8.08
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/24/1984 16.82 Flush Top Flush Mount 23.98 7.16
12N/36W-36L01 Oceano Dunes Middle Paso Robles
5/4/1982 14.80 Flush Top Flush Mount 23.98 9.18
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/19/1981 16.78 Flush Top Flush Mount 23.98 7.20
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/21/1981 15.00 Flush Top Flush Mount 23.98 8.98
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/20/1980 17.10 Flush Top Flush Mount 23.98 6.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
10/10/1980 17.10 Flush Top Flush Mount 23.98 6.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
12/11/1979 16.50 Flush Top Flush Mount 23.98 7.48
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/13/1979 16.40 Flush Top Flush Mount 23.98 7.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
4/16/1979 15.25 Flush Top Flush Mount 23.98 8.73
12N/36W-36L01 Oceano Dunes Middle Paso Robles
12/4/1978 14.84 Flush Top Flush Mount 23.98 9.14
12N/36W-36L01 Oceano Dunes Middle Paso Robles
5/4/1978 15.10 Flush Top Flush Mount 23.98 8.88
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/7/1977 18.05 Flush Top Flush Mount 23.98 5.93
12N/36W-36L01 Oceano Dunes Middle Paso Robles
5/17/1977 17.23 Flush Top Flush Mount 23.98 6.75
12N/36W-36L01 Oceano Dunes Middle Paso Robles
6/8/1976 19.15 Flush Top Flush Mount 23.98 4.83
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/14/1976 16.83 Flush Top Flush Mount 23.98 7.15
12N/36W-36L01 Oceano Dunes Middle Paso Robles
1/8/1976 13.70 Flush Top Flush Mount 23.98 10.28
12N/36W-36L01 Oceano Dunes Middle Paso Robles
12/25/1975 16.40 Flush Top Flush Mount 23.98 7.58
12N/36W-36L01 Oceano Dunes Middle Paso Robles
12/25/1975 16.20 Flush Top Flush Mount 23.98 7.78
12N/36W-36L01 Oceano Dunes Middle Paso Robles
11/25/1975 16.20 Flush Top Flush Mount 23.98 7.78
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 165
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L02 Oceano Dunes Deep Careaga 10/7/2020 25.28 Stove Pipe Top of Steel 26.77 1.50
12N/36W-36L02 Oceano Dunes Deep Careaga 4/7/2020 14.90 Stove Pipe Top of Steel 26.77 11.88
12N/36W-36L02 Oceano Dunes Deep Careaga 1/7/2020 15.06 Stove Pipe Top of Steel 26.77 11.71
12N/36W-36L02 Oceano Dunes Deep Careaga 10/9/2019 24.32 Stove Pipe Top of Steel 26.77 2.45
12N/36W-36L02 Oceano Dunes Deep Careaga 7/9/2019 21.30 Stove Pipe Top of Steel 26.77 5.47
12N/36W-36L02 Oceano Dunes Deep Careaga 4/9/2019 15.72 Stove Pipe Top of Steel 26.77 11.05
12N/36W-36L02 Oceano Dunes Deep Careaga 1/8/2019 17.45 Stove Pipe Top of Steel 26.77 9.32
12N/36W-36L02 Oceano Dunes Deep Careaga 10/9/2018 25.10 Stove Pipe Top of Steel 26.77 1.67
12N/36W-36L02 Oceano Dunes Deep Careaga 7/10/2018 24.11 Stove Pipe Top of Steel 26.77 2.66
12N/36W-36L02 Oceano Dunes Deep Careaga 4/10/2018 16.02 Stove Pipe Top of Steel 26.77 10.75
12N/36W-36L02 Oceano Dunes Deep Careaga 1/10/2018 19.11 Stove Pipe Top of Steel 26.77 7.66
12N/36W-36L02 Oceano Dunes Deep Careaga 10/10/2017 24.70 Stove Pipe Top of Steel 26.77 2.07
12N/36W-36L02 Oceano Dunes Deep Careaga 7/11/2017 23.65 Stove Pipe Top of Steel 26.77 3.12
12N/36W-36L02 Oceano Dunes Deep Careaga 4/10/2017 15.00 Stove Pipe Top of Steel 26.77 11.77
12N/36W-36L02 Oceano Dunes Deep Careaga 1/10/2017 16.15 Stove Pipe Top of Steel 26.77 10.62
12N/36W-36L02 Oceano Dunes Deep Careaga 10/12/2016 27.86 Stove Pipe Top of Steel 26.77 -1.09
12N/36W-36L02 Oceano Dunes Deep Careaga 7/19/2016 25.76 Stove Pipe Top of Steel 26.77 1.01
12N/36W-36L02 Oceano Dunes Deep Careaga 4/12/2016 18.43 Stove Pipe Top of Steel 26.77 8.34
12N/36W-36L02 Oceano Dunes Deep Careaga 1/12/2016 16.27 Stove Pipe Top of Steel 26.77 10.50
12N/36W-36L02 Oceano Dunes Deep Careaga 10/13/2015 27.17 Stove Pipe Top of Steel 26.77 -0.40
12N/36W-36L02 Oceano Dunes Deep Careaga 7/14/2015 26.11 Stove Pipe Top of Steel 26.77 0.66
12N/36W-36L02 Oceano Dunes Deep Careaga 4/14/2015 22.24 Stove Pipe Top of Steel 26.77 4.53
12N/36W-36L02 Oceano Dunes Deep Careaga 1/13/2015 16.91 Stove Pipe Top of Steel 26.77 9.86
12N/36W-36L02 Oceano Dunes Deep Careaga 10/14/2014 26.30 Stove Pipe Top of Steel 26.77 0.47
12N/36W-36L02 Oceano Dunes Deep Careaga 7/29/2014 25.64 Stove Pipe Top of Steel 26.77 1.13
12N/36W-36L02 Oceano Dunes Deep Careaga 6/4/2014 25.22 Stove Pipe Top of Steel 26.77 1.55
12N/36W-36L02 Oceano Dunes Deep Careaga 4/15/2014 16.94 Stove Pipe Top of Steel 26.77 9.83
12N/36W-36L02 Oceano Dunes Deep Careaga 1/14/2014 18.76 Stove Pipe Top of Steel 26.77 8.01
12N/36W-36L02 Oceano Dunes Deep Careaga 10/14/2013 23.94 Stove Pipe Top of Steel 26.77 2.83
12N/36W-36L02 Oceano Dunes Deep Careaga 7/9/2013 23.15 Stove Pipe Top of Steel 26.77 3.62
12N/36W-36L02 Oceano Dunes Deep Careaga 4/10/2013 15.35 Stove Pipe Top of Steel 26.77 11.42
12N/36W-36L02 Oceano Dunes Deep Careaga 1/14/2013 11.24 Stove Pipe Top of Steel 26.77 15.53
12N/36W-36L02 Oceano Dunes Deep Careaga 10/31/2012 18.81 Stove Pipe Top of Steel 26.77 7.96
12N/36W-36L02 Oceano Dunes Deep Careaga 7/24/2012 19.05 Stove Pipe Top of Steel 26.77 7.72
12N/36W-36L02 Oceano Dunes Deep Careaga 4/18/2012 10.81 Stove Pipe Top of Steel 26.77 15.96
12N/36W-36L02 Oceano Dunes Deep Careaga 1/11/2012 11.18 Stove Pipe Top of Steel 26.77 15.59
12N/36W-36L02 Oceano Dunes Deep Careaga 11/21/2011 13.99 Stove Pipe Top of Steel 26.77 12.78
12N/36W-36L02 Oceano Dunes Deep Careaga 7/26/2011 18.03 Stove Pipe Top of Steel 26.77 8.74
12N/36W-36L02 Oceano Dunes Deep Careaga 1/24/2011 9.37 Stove Pipe Top of Steel 26.77 17.40
12N/36W-36L02 Oceano Dunes Deep Careaga 10/21/2010 19.77 Stove Pipe Top of Steel 26.77 7.00
12N/36W-36L02 Oceano Dunes Deep Careaga 7/27/2010 20.53 Stove Pipe Top of Steel 26.77 6.24
12N/36W-36L02 Oceano Dunes Deep Careaga 4/26/2010 9.24 Flush Top Flush Mount 23.98 14.74
12N/36W-36L02 Oceano Dunes Deep Careaga 10/21/2009 17.65 Flush Top Flush Mount 23.98 6.33
12N/36W-36L02 Oceano Dunes Deep Careaga 8/20/2009 19.15 Flush Top Flush Mount 23.98 4.83
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 166
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L02 Oceano Dunes Deep Careaga 5/11/2009 14.38 Flush Top Flush Mount 23.98 9.60
12N/36W-36L02 Oceano Dunes Deep Careaga 10/23/2008 18.73 Flush Top Flush Mount 23.98 5.25
12N/36W-36L02 Oceano Dunes Deep Careaga 4/23/2008 11.55 Flush Top Flush Mount 23.98 12.43
12N/36W-36L02 Oceano Dunes Deep Careaga 10/18/2007 17.70 Flush Top Flush Mount 23.98 6.28
12N/36W-36L02 Oceano Dunes Deep Careaga 4/18/2007 10.30 Flush Top Flush Mount 23.98 13.68
12N/36W-36L02 Oceano Dunes Deep Careaga 10/12/2006 14.36 Flush Top Flush Mount 23.98 9.62
12N/36W-36L02 Oceano Dunes Deep Careaga 4/20/2006 3.41 Flush Top Flush Mount 23.98 20.57
12N/36W-36L02 Oceano Dunes Deep Careaga 10/28/2005 14.10 Flush Top Flush Mount 23.98 9.88
12N/36W-36L02 Oceano Dunes Deep Careaga 4/29/2005 6.50 Flush Top Flush Mount 23.98 17.48
12N/36W-36L02 Oceano Dunes Deep Careaga 10/15/2004 16.57 Flush Top Flush Mount 23.98 7.41
12N/36W-36L02 Oceano Dunes Deep Careaga 4/29/2004 3.80 Flush Top Flush Mount 23.98 20.18
12N/36W-36L02 Oceano Dunes Deep Careaga 10/28/2003 11.73 Flush Top Flush Mount 23.98 12.25
12N/36W-36L02 Oceano Dunes Deep Careaga 10/17/2002 12.00 Flush Top Flush Mount 23.98 11.98
12N/36W-36L02 Oceano Dunes Deep Careaga 4/18/2002 5.80 Flush Top Flush Mount 23.98 18.18
12N/36W-36L02 Oceano Dunes Deep Careaga 10/5/2001 9.80 Flush Top Flush Mount 23.98 14.18
12N/36W-36L02 Oceano Dunes Deep Careaga 4/24/2001 1.80 Flush Top Flush Mount 23.98 22.18
12N/36W-36L02 Oceano Dunes Deep Careaga 10/13/2000 9.00 Flush Top Flush Mount 23.98 14.98
12N/36W-36L02 Oceano Dunes Deep Careaga 4/28/2000 3.40 Flush Top Flush Mount 23.98 20.58
12N/36W-36L02 Oceano Dunes Deep Careaga 4/23/1999 10.80 Flush Top Flush Mount 23.98 13.18
12N/36W-36L02 Oceano Dunes Deep Careaga 10/29/1998 10.19 Flush Top Flush Mount 23.98 13.79
12N/36W-36L02 Oceano Dunes Deep Careaga 10/24/1996 13.80 Flush Top Flush Mount 23.98 10.18
12N/36W-36L02 Oceano Dunes Deep Careaga 10/26/1995 14.50 Flush Top Flush Mount 23.98 9.48
12N/36W-36L02 Oceano Dunes Deep Careaga 4/19/1995 6.25 Flush Top Flush Mount 23.98 17.73
12N/36W-36L02 Oceano Dunes Deep Careaga 11/1/1994 15.50 Flush Top Flush Mount 23.98 8.48
12N/36W-36L02 Oceano Dunes Deep Careaga 4/11/1994 9.38 Flush Top Flush Mount 23.98 14.60
12N/36W-36L02 Oceano Dunes Deep Careaga 10/20/1993 16.10 Flush Top Flush Mount 23.98 7.88
12N/36W-36L02 Oceano Dunes Deep Careaga 5/3/1993 11.60 Flush Top Flush Mount 23.98 12.38
12N/36W-36L02 Oceano Dunes Deep Careaga 4/20/1993 9.50 Flush Top Flush Mount 23.98 14.48
12N/36W-36L02 Oceano Dunes Deep Careaga 11/4/1992 16.90 Flush Top Flush Mount 23.98 7.08
12N/36W-36L02 Oceano Dunes Deep Careaga 4/30/1992 11.50 Flush Top Flush Mount 23.98 12.48
12N/36W-36L02 Oceano Dunes Deep Careaga 10/11/1991 16.80 Flush Top Flush Mount 23.98 7.18
12N/36W-36L02 Oceano Dunes Deep Careaga 4/16/1991 10.83 Flush Top Flush Mount 23.98 13.15
12N/36W-36L02 Oceano Dunes Deep Careaga 10/11/1990 17.05 Flush Top Flush Mount 23.98 6.93
12N/36W-36L02 Oceano Dunes Deep Careaga 4/24/1990 11.39 Flush Top Flush Mount 23.98 12.59
12N/36W-36L02 Oceano Dunes Deep Careaga 10/12/1989 13.54 Flush Top Flush Mount 23.98 10.44
12N/36W-36L02 Oceano Dunes Deep Careaga 4/20/1989 8.90 Flush Top Flush Mount 23.98 15.08
12N/36W-36L02 Oceano Dunes Deep Careaga 10/25/1988 12.98 Flush Top Flush Mount 23.98 11.00
12N/36W-36L02 Oceano Dunes Deep Careaga 4/21/1988 8.40 Flush Top Flush Mount 23.98 15.58
12N/36W-36L02 Oceano Dunes Deep Careaga 10/19/1987 11.40 Flush Top Flush Mount 23.98 12.58
12N/36W-36L02 Oceano Dunes Deep Careaga 8/5/1987 11.40 Flush Top Flush Mount 23.98 12.58
12N/36W-36L02 Oceano Dunes Deep Careaga 4/13/1987 3.24 Flush Top Flush Mount 23.98 20.74
12N/36W-36L02 Oceano Dunes Deep Careaga 10/31/1986 7.51 Flush Top Flush Mount 23.98 16.47
12N/36W-36L02 Oceano Dunes Deep Careaga 4/27/1986 3.56 Flush Top Flush Mount 23.98 20.42
12N/36W-36L02 Oceano Dunes Deep Careaga 4/4/1985 4.10 Flush Top Flush Mount 23.98 19.88
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Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/36W-36L02 Oceano Dunes Deep Careaga 10/24/1984 8.32 Flush Top Flush Mount 23.98 15.66
12N/36W-36L02 Oceano Dunes Deep Careaga 5/4/1982 3.12 Flush Top Flush Mount 23.98 20.86
12N/36W-36L02 Oceano Dunes Deep Careaga 10/19/1981 11.75 Flush Top Flush Mount 23.98 12.23
12N/36W-36L02 Oceano Dunes Deep Careaga 4/21/1981 4.14 Flush Top Flush Mount 23.98 19.84
12N/36W-36L02 Oceano Dunes Deep Careaga 10/20/1980 10.40 Flush Top Flush Mount 23.98 13.58
12N/36W-36L02 Oceano Dunes Deep Careaga 12/11/1979 9.30 Flush Top Flush Mount 23.98 14.68
12N/36W-36L02 Oceano Dunes Deep Careaga 11/13/1979 10.00 Flush Top Flush Mount 23.98 13.98
12N/36W-36L02 Oceano Dunes Deep Careaga 4/16/1979 5.46 Flush Top Flush Mount 23.98 18.52
12N/36W-36L02 Oceano Dunes Deep Careaga 12/4/1978 9.90 Flush Top Flush Mount 23.98 14.08
12N/36W-36L02 Oceano Dunes Deep Careaga 5/4/1978 6.84 Flush Top Flush Mount 23.98 17.14
12N/36W-36L02 Oceano Dunes Deep Careaga 11/7/1977 16.20 Flush Top Flush Mount 23.98 7.78
12N/36W-36L02 Oceano Dunes Deep Careaga 5/17/1977 13.31 Flush Top Flush Mount 23.98 10.67
12N/36W-36L02 Oceano Dunes Deep Careaga 6/8/1976 12.75 Flush Top Flush Mount 23.98 11.23
12N/36W-36L02 Oceano Dunes Deep Careaga 1/14/1976 7.03 Flush Top Flush Mount 23.98 16.95
12N/36W-36L02 Oceano Dunes Deep Careaga 1/8/1976 6.50 Flush Top Flush Mount 23.98 17.48
12N/36W-36L02 Oceano Dunes Deep Careaga 11/25/1975 7.50 Flush Top Flush Mount 23.98 16.48
P:\Portland\672-Northern Cities Management Area\NCMA WLEs\NCMA_WL_SentryWells.xlsx 3/18/2021
Item 11.a. - Page 168
Appendix A: NCMA Sentry Wells Water Level Data
Well Common
Name Aquifer Date Depth to Water
(feet)
Surface
Completion RP Description RP Elev,
(feet NAVD88)
Groundwater
Elevation
(feet NAVD88)
12N/35W-32C03 County MW-3 Paso Robles 10/7/2020 43.03 Flush Top Flush Mount 47.70 4.67
12N/35W-32C03 County MW-3 Paso Robles 7/6/2020 41.31 Flush Top Flush Mount 47.70 6.39
12N/35W-32C03 County MW-3 Paso Robles 4/7/2020 31.48 Flush Top Flush Mount 47.70 16.22
12N/35W-32C03 County MW-3 Paso Robles 1/7/2020 35.29 Flush Top Flush Mount 47.70 12.41
12N/35W-32C03 County MW-3 Paso Robles 10/9/2019 42.42 Flush Top Flush Mount 47.70 5.28
12N/35W-32C03 County MW-3 Paso Robles 7/9/2019 37.20 Flush Top Flush Mount 47.70 10.50
12N/35W-32C03 County MW-3 Paso Robles 4/9/2019 32.50 Flush Top Flush Mount 47.70 15.20
12N/35W-32C03 County MW-3 Paso Robles 1/8/2019 35.45 Flush Top Flush Mount 47.70 12.25
12N/35W-32C03 County MW-3 Paso Robles 10/9/2018 43.85 Flush Top Flush Mount 47.70 3.85
12N/35W-32C03 County MW-3 Paso Robles 7/10/2018 40.00 Flush Top Flush Mount 47.70 7.70
12N/35W-32C03 County MW-3 Paso Robles 4/10/2018 32.80 Flush Top Flush Mount 47.70 14.90
12N/35W-32C03 County MW-3 Paso Robles 1/10/2018 35.10 Flush Top Flush Mount 47.70 12.60
12N/35W-32C03 County MW-3 Paso Robles 10/10/2017 42.05 Flush Top Flush Mount 47.70 5.65
12N/35W-32C03 County MW-3 Paso Robles 7/11/2017 38.34 Flush Top Flush Mount 47.70 9.36
12N/35W-32C03 County MW-3 Paso Robles 4/11/2017 28.44 Flush Top Flush Mount 47.70 19.26
12N/35W-32C03 County MW-3 Paso Robles 1/10/2017 34.85 Flush Top Flush Mount 47.70 12.85
12N/35W-32C03 County MW-3 Paso Robles 10/12/2016 47.49 Flush Top Flush Mount 47.70 0.21
12N/35W-32C03 County MW-3 Paso Robles 7/19/2016 44.51 Flush Top Flush Mount 47.70 3.19
12N/35W-32C03 County MW-3 Paso Robles 4/12/2016 36.41 Flush Top Flush Mount 47.70 11.29
12N/35W-32C03 County MW-3 Paso Robles 1/12/2016 36.48 Flush Top Flush Mount 47.70 11.22
12N/35W-32C03 County MW-3 Paso Robles 10/13/2015 51.21 Flush Top Flush Mount 47.70 -3.51
12N/35W-32C03 County MW-3 Paso Robles 7/14/2015 49.07 Flush Top Flush Mount 47.70 -1.37
12N/35W-32C03 County MW-3 Paso Robles 4/14/2015 44.00 Flush Top Flush Mount 47.70 3.70
12N/35W-32C03 County MW-3 Paso Robles 1/13/2015 38.90 Flush Top Flush Mount 47.70 8.80
12N/35W-32C03 County MW-3 Paso Robles 10/14/2014 50.50 Flush Top Flush Mount 47.70 -2.80
12N/35W-32C03 County MW-3 Paso Robles 7/29/2014 44.02 Flush Top Flush Mount 47.70 3.68
12N/35W-32C03 County MW-3 Paso Robles 6/4/2014 45.46 Flush Top Flush Mount 47.70 2.24
12N/35W-32C03 County MW-3 Paso Robles 4/15/2014 41.51 Flush Top Flush Mount 47.70 6.19
12N/35W-32C03 County MW-3 Paso Robles 1/14/2014 41.00 Flush Top Flush Mount 47.70 6.70
12N/35W-32C03 County MW-3 Paso Robles 10/14/2013 45.26 Flush Top Flush Mount 47.70 2.44
12N/35W-32C03 County MW-3 Paso Robles 7/9/2013 43.83 Flush Top Flush Mount 47.70 3.87
12N/35W-32C03 County MW-3 Paso Robles 4/10/2013 37.89 Flush Top Flush Mount 47.70 9.81
12N/35W-32C03 County MW-3 Paso Robles 1/14/2013 32.26 Flush Top Flush Mount 47.70 15.44
12N/35W-32C03 County MW-3 Paso Robles 10/30/2012 40.05 Flush Top Flush Mount 47.70 7.65
12N/35W-32C03 County MW-3 Paso Robles 7/25/2012 38.62 Flush Top Flush Mount 47.70 9.08
12N/35W-32C03 County MW-3 Paso Robles 4/19/2012 23.02 Flush Top Flush Mount 47.70 24.68
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Item 11.a. - Page 169
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/12E-24B01 10/12/2020 3,100 1,400 520 28.0 180.0 180 420 210 0 2.00 0.12 0.300 0.110 1.30 3.80 420004,840 2.032S/12E-24B01 4/22/2020 2,800 1,300 510 27.0 170.0 170 400 190 0 2.10 0.13 0.000 0.120 1.30 3.90 400004,930 3.232S/12E-24B01 10/14/2019 3,100 1,300 540 29.0 180.0 180 410 180 0 1.90 0.15 0.150 0.012 1.30 3.70 410004,900 2.732S/12E-24B01 4/10/2019 2,800 1,400 520 35 180 190 430 200 ND 2 0.15 ND 0.11 1.4 4.0430NDND 5,260 2.132S/12E-24B01 10/9/2018 2,800 1,400 600 35 180 190 410 190 ND 2 0.15 ND 0.11 1.4 2.8410NDND 5,040 2232S/12E-24B01 4/11/2018 3,000 1,400 560 33 170 180 430 200 0.25 2.0 0.15 ND 0.11 1.4 5.1430NDND 5,150 2.232S/12E-24B01 10/11/2017 3,100 1,400 590 36 180 190 430 190 ND 2.3 0.17 0.13 0.11 1.4 0.64 430NDND 5,180 1.732S/12E-24B01 4/11/2017 3,400 1,400 680 41 190 210 420 190 ND 2.4 0.16 0.17 0.11 1.6 4.7420NDND 5,020 1.832S/12E-24B01 10/11/2016 3,100 1,400 700 44 210 220 450 190 0.26 2.1 0.18 ND 0.12 1.6 4.1450NDND 5,020 1.332S/12E-24B01 4/12/2016 2,800 1,400 640 37 170 180 420 190 <0.48 2.2 0.16 <0.055 0.081 1.3 4.8420<8.2 <8.2 5,000 0.7332S/12E-24B01 10/15/2015 3,230 230 560 34 160 170 413 42 <0.05 2.2 0.14 <0.10 0.091 1.1 0.68 413<10<10 4,880 0.5432S/12E-24B01 4/15/2015 3,010 1,300 510 30 150 160 410 220 <0.05 2.9 0.15 <0.5 0.023 1.0 3.4410<10<10 4,760 0.7232S/12E-24B01 1/14/2015 2,980 1,300 520 30 150 170 400 210 <0.25 2.2 0.14 <0.5 <0.021 1.0 2.9400<10<10 4,640 0.5232S/12E-24B01 10/14/2014 3,160 1,100 530 32 150 170 390 180 0.32 2.2 0.16 <0.5 <0.01 1.1 <0.5 390<10<10 4,780 0.6732S/12E-24B01 7/30/2014 2,950 1,300 520 29 140 170 440 190 <0.25 1.9 0.11 <0.5 0.03 1.1 2.6440<10<10 4,830 0.6232S/12E-24B01 4/16/2014 2,880 1,200 560 29 140 140 390 190 <0.05 2.2 0.130 <0.5 0.03 0.92 2.9390<10<10 4,790 0.7232S/12E-24B01 1/15/2014 2,870 1,300 540 30 140 160 380 214 <0.25 2.4 0.17 <0.5 <0.01 1.0 3.0380<10<10 4,800 0.7132S/12E-24B01 10/15/2013 2,860 1,200 560 31 150 160 380 200 <0.25 2.2 0.13 <0.5 <0.01 1.0 3.0380<10<10 4,810 0.7532S/12E-24B01 7/9/2013 2,960 1,300 560 32 150 160 395 215 <0.25 2.4 0.16 <0.5 <0.01 1.1 2.0395<10<10 4,850 0.8132S/12E-24B01 4/10/2013 2,920 1,300 540 30 140 150 410 220 <0.25 1.9 0.16 <0.1 <0.01 1.00 3.5410<10<10 4,830 0.6732S/12E-24B01 1/14/2013 2,630 1,300 540 30 140 140 410 220 <0.05 2.7 0.15 <0.1 <0.01 0.96 2.8410<10<10 4,790 0.7232S/12E-24B01 10/29/2012 2,950 1,200 590 34 150 160 360 200 <0.25 2.4 0.18 <0.5 <0.01 1.1 11360<10<10 4,750 0.7832S/12E-24B01 7/23/2012 3,010 1,400 530 30 120 130 397 210 <0.05 2.1 0.15 <0.1 0.041 0.86 3397<10<10 4,720 1.432S/12E-24B01 4/18/2012 3,000 1,500 450 27 120 120 400 230 <0.1 2 0.13 0.13 <0.01 0.89 3.12 400<10<10 4,660 0.632S/12E-24B01 1/11/2012 2,750 1,200 520 30 140 140 400 170 <0.1 4 0.18 0.1 0.033 0.94 3.2400<10<10 4,560 0.5532S/12E-24B01 11/21/2011 2,740 1,200 410 25 130 120 380 200 <0.3 2.3 0.13 <0.6 0.053 0.9 2.73 380<10<10 4,470 0.732S/12E-24B01 7/25/2011 3,690 1,200 530 33 140 150 380 200.2 <0.05 1.8 0.14 <0.1 0.053 0.91 3.281 380<5<5 4,900 0.7332S/12E-24B01 4/20/2011 2,810 1,214 500 27 140 130 400 216 <0.05 1.7 0.24 0.18 0.067 0.95 3.3400<2.0 <2.0 4,430 NA32S/12E-24B01 1/24/2011 2,380 1,100 370 24 110 120 380 180 <0.15 1.8 0.16 <0.3 0.63 0.68 2.8380<2.0 <2.0 4,020 0.8932S/12E-24B01 10/28/2010 2,330 960 390 25 140 140 350 160 <0.1 3.9 0.15 <0.1 NA 0.75 2.6350<10<10 3,860 1.332S/12E-24B01 7/27/2010 616 43 52.5 6.21 115 44.7 341 160 < 0.10 2.9 0.063 < 0.10 0.11 0.274 0.18 341< 1.0 < 1.0 1,000 9.3432S/12E-24B01 4/27/2010 676 47 54.7 4.60 107 43.6 327 140 < 0.10 0.98 0.0714 < 0.10 < 0.10 0.0458 0.18 327< 1.0 < 1.0 990 4.0632S/12E-24B01 1/27/2010 694 55 56.2 6.80 123 43.2 340 150 0.40 1.7 0.12 < 0.10 0.33 0.875 0.19 340< 1.0 < 1.0 1,000 16.632S/12E-24B01 10/19/2009 766 140 121 16.7 111 52.4 303 150 0.25 2.8 0.0959 0.11 < 0.10 0.208 0.47 303< 1.0 < 1.0 1,200 7.7932S/12E-24B01 8/20/2009 705 94 86.8 11.7 116 35.6 286 150 0.21 2.7 NA < 0.10 0.12 0.248 0.38 286< 1.0 < 1.0 1,000 7.1532S/12E-24B01 5/12/2009 695 100 82.1 13.2 108 45288 150 NA NA NA 0.11 NA 0.66 0.29 288< 1.0 < 1.0 1,100 23.932S/12E-24B01 3/26/1996 1,870 773 380 24.0 125 95427 154 0.0452 NA 0.27 NA NA NA NANANANANA NA32S/12E-24B01 6/9/1976 1,706 667 400 16.2 94 95474 159 0.0904 NA 0.12 0.5 NA NA NANANANANA NA32S/12E-24B01 1/17/1966 1,700 652 406 20.0 95 83440 175 1 NA 0.07 0.3 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 170
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/12E-24B02 10/12/2020 700 31 46 3.6 120.0 36320 160 0 0.21 0.07 0.054 0.014 0.18 0.10 32000936 0.532S/12E-24B02 7/7/2020 690 31 48 3.6 120.0 35300 170 0 0.23 0.07 0.047 0.014 0.18 0.08 30044945 0.532S/12E-24B02 4/22/2020 560 31 41 3.4 100.0 32330 160 0 0.28 0.06 0.026 0.014 0.16 0.00 33000960 0.532S/12E-24B02 1/15/2020 660 31 47 4.0 120.0 37320 160 0 0.23 0.08 0.055 0.017 0.18 0.14 32000900 0.632S/12E-24B02 10/14/2019 700 30 45 3.7 110.0 35310 160 0 0.10 0.08 0.046 0.110 0.18 0.00 31000931 0.632S/12E-24B02 7/10/2019 550 30 48 4.2 120.0 37320 160 0 0.34 0.07 0.037 0.015 0.18 0.00 32000931 0.632S/12E-24B02 4/10/2019 620 31 42 3.6 110 35320 160 ND 0.31 0.070 0.059 ND 0.17 0.130 320NDND941 0.5932S/12E-24B02 1/8/2019 630 30 43 3.6 110 35310 160 ND 0.27 0.072 0.056 0.013 0.17 0.096 310NDND938 0.5932S/12E-24B02 10/9/2018 640 30 48 3.8 120 37320 160 ND 0.34 0.068 0.025 0.013 0.18 0.06 320NDND952 0.6232S/12E-24B02 7/12/2018 620 29 46 3.7 120 36320 150 ND 0.30 0.072 0.042 0.013 0.17 0.11 320NDND962 0.6932S/12E-24B02 4/11/2018 660 31 45 3.5 110 35320 160 0.034 0.28 0.069 0.050 0.011 0.17 0.10 320NDND942 0.5832S/12E-24B02 1/12/2018 570 30 53 3.8 120 38320 160 ND 0.32 0.071 0.068 0.015 0.18 0.11 320NDND930 0.5632S/12E-24B02 10/11/2017 670 31 45 3.7 120 38330 160 ND 0.41 0.077 0.045 0.014 0.18 0.1330NDND962 0.7432S/12E-24B02 7/12/2017 760 31 48 4 130 39310 160 ND 0.18 0.072 0.04 0.015 0.2 0.12 310NDND948 0.9332S/12E-24B02 4/11/2017 630 34 46 3.7 120 35310 170 ND 0.31 0.062 0.09. 0.017 0.17 0.12 310NDND933 0.5932S/12E-24B02 1/12/2017 660 34 47 3.7 120 36320 170 ND 0.26 0.069 0.031 0.023 0.2 0.097 320NDND938 0.7932S/12E-24B02 10/11/2016 660 35 48 4 120 39320 170 ND 0.26 0.069 0.038 0.023 0.18 0.12 320NDND953 0.7532S/12E-24B02 7/19/2016 660 36 50 3.9 120 38320 160 <0.022 0.15 0.07 0.036 0.016 0.17 0.15 320<4.1 <4.1 947 0.6732S/12E-24B02 4/12/2016 640 35 48 3.8 110 37300 160 <0.022 0.38 0.064 0.045 0.011 0.17 0.13 300<4.1 <4.1 939 0.5332S/12E-24B02 1/12/2016 570 38 48 3.8 110 36290 170 <0.022 0.27 0.044 0.11 0.015 0.16 0.15 290<4.1 <4.1 951 0.4832S/12E-24B02 10/15/2015 650 34 41 3.8 100 33306 160 <0.05 <1 0.054 <0.10 0.014 0.18 <0.10 306<10<10 950 0.7232S/12E-24B02 7/15/2015 650 35 50 3.0 120 36295 160 <0.05 <1 0.069 <0.1 0.01 0.16 <0.1 295<10<10 950 0.6932S/12E-24B02 4/15/2015 620 35 40 3.4 100 31300 170 <0.05 <1 0.066 <0.1 0.01 0.14 <0.1 300<10<10 900 0.4532S/12E-24B02 1/14/2015 640 36 41 3.3 110 32290 170 <0.05 <1 0.062 <0.1 <0.01 0.14 <0.1 290<10<10 900 0.4832S/12E-24B02 10/14/2014 630 30 41 3.9 100 32290 140 <0.05 <1 0.065 <0.1 <0.01 0.15 <0.1 290<10<10 940 0.4432S/12E-24B02 7/29/2014 620 33 42 3.5 100 33300 150 <0.05 <1 <0.1 <0.1 <0.01 0.14 <0.1 300<10<10 940 0.3732S/12E-24B02 4/16/2014 630 32 43 4.3 88 28300 150 <0.05 <1 0.067 <0.1 <0.01 0.12 <0.1 300<10<10 940 0.3232S/12E-24B02 1/15/2014 630 33 46 3.9 100 34290 165 <0.05 <1 <0.05 <0.1 <0.01 0.14 <0.1 290<10<10 940 0.3732S/12E-24B02 10/15/2013 630 30 44 3.8 98 32290 170 <0.05 <1 <0.05 <0.1 <0.01 0.13 <0.1 290<10<10 920 0.3932S/12E-24B02 7/9/2013 630 30 43 3.9 110 33295 170 <0.05 <1 0.076 <0.1 <0.01 0.14 <0.1 295<10<10 940 0.632S/12E-24B02 4/10/2013 630 31 44 4 100 32310 160 <0.05 <1 0.08 <0.1 <0.01 0.13 <0.1 310<10<10 940 0.4132S/12E-24B02 1/14/2013 620 30 43 4 97 31305 170 <0.05 <1 0.079 <0.1 <0.01 0.12 <0.1 305<10<10 950 0.7232S/12E-24B02 10/29/2012 650 29 45 4.2 100 32280 160 <0.05 <1 0.074 0.14 <0.01 0.13 <0.1 280<10<10 950 0.5632S/12E-24B02 7/23/2012 650 35 45 4.3 87 27297 170 <0.05 <1 <0.1 <0.1 <0.01 0.12 <0.1 297<10<10 950 0.4332S/12E-24B02 4/18/2012 630 37 39 3.7 88 28310 171 <0.1 <1 <0.1 0.16 <0.01 0.099 <0.2 310<10<10 950 0.2632S/12E-24B02 1/11/2012 650 33 46 4.6 110 32300 150 <0.1 1.3 <0.1 0.21 <0.02 0.13 0.03 300<10<10 950 1.732S/12E-24B02 11/21/2011 640 32 39 3.9 93 29290 150 <0.05 <1 0.064 <0.1 <0.01 0.096 <0.1 290<10<10 930 0.3232S/12E-24B02 7/25/2011 640 36 48 4.2 97 31290 165.3 <0.05 <1 <0.1 <0.1 <0.01 0.096 <0.1 290<5<5950 0.8832S/12E-24B02 4/20/2011 620 39 46 7.4 90 36320 174 <0.05 <1 0.17 0.14 0.014 <0.005 <0.1 320<2.0 <2.0 950 NA32S/12E-24B02 1/24/2011 640 43 44 5.9 87 28270 170 <0.05 <1.0 0.11 <0.1 0.14 0.085 <0.1 270<2.0 <2.0 940 1.332S/12E-24B02 10/28/2010 650 43 50 4.5 110 35270 160 <0.1 <1.0 0.12 <0.1 NA 0.085 <0.3 270<10<10 970 0.6332S/12E-24B02 7/27/2010 598 42 48.9 4.29 111 40.5 318 160 < 0.10 1.3 0.0609 < 0.10 0.11 0.106 0.15 318< 1.0 < 1.0 980 2.8432S/12E-24B02 4/27/2010 668 46 52.7 4.73 111 43.2 349 150 < 0.10 1.3 0.0666 < 0.10 0.14 0.101 0.16 349< 1.0 < 1.0 980 6.6632S/12E-24B02 1/27/2010 622 45 58.0 5.39 115 32.2 270 160 0.18 0.84 0.117 < 0.10 0.14 0.209 0.16 270< 1.0 < 1.0 920 3.4932S/12E-24B02 10/19/2009 600 49 59.1 5.12 112 30.1 281 160 < 0.10 0.98 0.0776 0.14 < 0.10 0.163 0.19 281< 1.0 < 1.0 870 1.1432S/12E-24B02 8/20/2009 630 49 63.5 5.85 128 30.1 288 150 < 0.10 0.98 NA < 0.10 < 0.10 0.203 0.20 288< 1.0 < 1.0 920 3.2232S/12E-24B02 5/12/2009 622 82 67.5 6.33 114 34.5 282 150 NA NA NA 0.11 NA 0.252 0.24 282< 1.0 < 1.0 990 6.7632S/12E-24B02 3/26/1996 652 54 46 5 107 24344 169 0.0452 NA 0.1 NA NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 171
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/12E-24B02 6/9/1976 565 34 52 4 104 27337 153 0.1355 NA 0.02 0.5 NA NA NANANANANA NA32S/12E-24B02 1/17/1966 651 62 79 5 101 32380 147 0 NA 0.05 0.3 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 172
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/12E-24B03 10/12/2020 740 51 53 3.8 110.0 40320 170 0 0.00 0.06 0.032 0.021 0.01 0.16 320001,010 0.332S/12E-24B03 7/7/2020 760 53 55 3.9 110.0 42330 170 0 0.20 0.06 0.050 0.021 0.01 0.22 330881,020 0.232S/12E-24B03 4/22/2020 570 50 50 3.7 110.0 39330 160 0 0.12 0.06 0.000 0.022 0.01 0.17 330001,040 0.332S/12E-24B03 1/15/2020 590 50 55 4.0 120.0 42330 160 0 0.08 0.07 0.000 0.025 0.01 0.13 33000972 0.332S/12E-24B03 10/14/2019 660 48 56 4.0 120.0 40330 170 0 0.11 0.07 0.029 0.018 0.01 0.18 330001,010 0.332S/12E-24B03 7/10/2019 590 49 53 4.2 110.0 44330 160 0 0.15 0.07 0.020 0.018 0.01 0.18 330001,000 0.232S/12E-24B03 4/10/2019 640 50 50 3.7 110 43320 160 ND 0.15 0.063 0.037 0.017 0.012 0.16 320NDND 1,020 0.4432S/12E-24B03 1/8/2019 660 50 50 3.9 110 43320 160 ND 0.12 0.065 0.039 0.021 0.011 0.14 320NDND 1,020 0.2132S/12E-24B03 10/9/2018 690 48 52 4.1 110 45320 160 ND 0.19 0.065 ND 0.020 0.011 0.10 320NDND 1,030 0.1932S/12E-24B03 7/12/2018 650 47 51 3.8 110 42320 150 ND 0.14 0.062 0.023 0.020 0.10 0.16 320NDND 1,040 0.1832S/12E-24B03 4/11/2018 670 50 53 4.0 110 44320 160 ND 0.11 0.065 0.017 0.019 0.011 0.19 320NDND 1,010 0.1932S/12E-24B03 1/12/2018 620 48 57 3.9 110 45330 160 ND 0.13 0.061 0.041 0.023 0.011 0.18 330NDND993 0.1932S/12E-24B03 10/11/2017 660 49 54 4 120 45330 160 ND 0.16 0.069 0.022 0.02 0.011 0.19 330NDND 1020 0.2032S/12E-24B03 7/12/2017 790 46 54 4 120 45320 160 ND ND 0.062 0.015 0.02 0.011 0.18 320NDND 1,010 0.1932S/12E-24B03 4/11/2017 670 48 55 4.1 120 45330 160 ND 0.17 0.058 ND 0.019 0.012 0.21 330NDND988 0.2332S/12E-24B03 1/12/2017 670 47 58 4.3 130 50340 160 ND ND 0.068 0.012 0.024 0.014 0.18 340NDND 1,000 0.2732S/12E-24B03 10/11/2016 680 49 53 4 110 47340 160 ND ND 0.06 0.015 0.025 0.013 0.17 340NDND 1020 0.2232S/12E-24B03 7/19/2016 690 47 54 4.1 110 46340 160 <0.022 0.32 0.063 0.017 0.016 0.013 0.20 340<8.2 <8.2 1,010 0.3232S/12E-24B03 4/12/2016 680 48 55 4.1 110 45320 160 <0.022 0.21 0.056 0.019 0.018 0.012 0.17 320<8.2 <8.2 1,010 0.2832S/12E-24B03 1/12/2016 610 51 53 4.0 110 46320 170 <0.022 0.11 0.037 0.038 <0.10 0.015 0.19 320<8.2 <8.2 1,050 0.2732S/12E-24B03 10/15/2015 650 44 48 4.4 100 42325 160 <0.05 <1 <0.05 <0.10 0.016 0.010 <0.10 325<10<10 1,020 0.2132S/12E-24B03 7/15/2015 680 46 60 40.0 120 47333 160 <0.05 <1 0.064 <0.1 0.01 0.010 <0.1 333<10<10 1,020 0.2032S/12E-24B03 4/15/2015 650 46 44 3.5 96 38330 170 <0.05 <1 0.061 <0.1 0.012 0.0080 <0.1 330<10<10 980 0.1732S/12E-24B03 1/14/2015 670 47 48 3.6 110 43330 170 <0.05 <1 0.052 <0.10 0.01 0.090 <0.1 330<10<10 970 0.1732S/12E-24B03 10/14/2014 650 40 48 4.1 100 41330 142 <0.05 <1 0.061 <0.1 <0.01 0.010 <0.1 330<10<10 1,010 0.1932S/12E-24B03 7/30/2014 650 45 45 3.1 94 40390 150 <0.05 <1 <0.1 <0.1 <0.01 <0.005 <0.1 390<10<10 1,020 0.1932S/12E-24B03 4/16/2014 660 43 46 4.3 90 35330 150 0.23 <1 0.056 <0.1 <0.01 <0.005 0.11 330<10<10 1,010 0.1632S/12E-24B03 1/15/2014 660 45 52 4.0 100 41320 165 <0.05 <1 <0.05 <0.1 <0.01 0.0090 <0.1 320<10<10 1,010 0.1732S/12E-24B03 10/15/2013 720 40 51 4.0 100 40310 170 <0.05 <1 <0.05 <0.1 <0.01 0.0090 <0.1 310<10<10 1,010 0.232S/12E-24B03 7/9/2013 660 46 47 3.9 110 41310 170 <0.05 <1 0.066 <0.1 <0.01 0.0100 <0.1 310<10<10 1,010 0.2732S/12E-24B03 4/10/2013 670 44 46 3.8 96 38320 160 <0.05 <1 0.071 <0.1 <0.01 0.0080 <0.1 320<10<10 1,010 0.1932S/12E-24B03 1/14/2013 630 45 47 3.9 96 37320 170 <0.05 <1 0.065 <0.1 <0.01 0.0080 <0.1 320<10<10 1,010 0.2632S/12E-24B03 10/29/2012 680 45 49 4.1 100 39305 158 <0.05 <1 0.069 0.1 <0.01 0.0090 <0.1 305<10<10 1,010 0.2232S/12E-24B03 7/23/2012 670 49 47 4.1 86 35318 170 <0.05 <1 <0.1 <0.1 <0.01 0.0150 <0.1 318<10<10 1,010 0.2432S/12E-24B03 4/18/2012 640 50 40 3.4 84 33320 160 <0.1 <1 <0.1 <0.2 <0.01 0.0070 <0.2 320<10<10 1,010 0.2332S/12E-24B03 1/12/2012 660 46 48 3.2 92 36300 150 <0.1 <1 <0.1 0.35 <0.02 0.0080 <0.2 300<10<10 1,000 0.1532S/12E-24B03 11/21/2011 660 43 41 3.7 91 34310 150 <0.05 1.6 0.046 <0.1 0.014 0.0090 <0.1 310<10<10 970 0.1232S/12E-24B03 7/25/2011 650 46 50 6.0 98 38310 159.6 <0.05 <1 <0.1 <0.1 0.011 0.0100 <0.1 310<5<5 1,010 0.2132S/12E-24B03 4/20/2011 650 47 48 4.6 95 31310 168 <0.05 <1 0.11 0.08 0.015 0.0080 <0.1 310<2.0 <2.0 1,020 NA32S/12E-24B03 1/24/2011 660 46 44 5.6 87 33320 160 <0.05 <1.0 NA <0.1 0.15 0.0096 <0.1 320<2.0 <2.0 1,020 0.2232S/12E-24B03 10/28/2010 660 44 48 3.8 110 39315 50 <0.1 <1.0 0.089 <0.1 NA 0.0120 <0.3 315<10<10 1,020 0.5532S/12E-24B03 7/27/2010 610 44 51.4 8.34 112 41.6 328 160 < 0.10 1.8 0.0533 < 0.10 0.17 0.0602 0.16 328< 1.0 < 1.0 1,000 6.732S/12E-24B03 4/27/2010 666 45 53.2 4.84 118 44357 150 < 0.10 1.5 0.0636 < 0.10 0.1 0.0519 0.17 357< 1.0 < 1.0 980 9.7132S/12E-24B03 1/27/2010 672 48 56.4 5.40 119 43.4 336 150 < 0.10 1.4 0.101 < 0.10 0.15 0.140 0.15 336< 1.0 < 1.0 1,000 5.1832S/12E-24B03 10/19/2009 622 40 55.1 3.93 110 42.6 342 160 < 0.10 < 0.50 0.0613 < 0.10 0.13 0.0181 0.14 342< 1.0 < 1.0 880 0.34332S/12E-24B03 8/19/2009 680 47 54.9 5.21 128 43.4 337 150 < 0.10 2.2 NA < 0.10 0.66 0.182 0.15 337< 1.0 < 1.0 1,000 14.332S/12E-24B03 5/12/2009 645 44 53.2 4.53 108 41.8 332 140 NA NA NA < 0.10 NA 0.124 0.16 332< 1.0 < 1.0 1,000 5.932S/12E-24B03 3/26/1996 646 41 52 4.3 104 42412 164 0.0452 NA 0.12 NA NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 173
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/12E-24B03 6/9/1976 569 36 53 3.7 85 39330 165 0 NA 0.06 0.4 NA NA NANANANANA NA32S/12E-24B03 1/17/1966 670 79 74 5 103 36345 158 1 NA 0 0.2 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 174
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30F01 10/12/2020 490 66 68 2.0 44.0 2083 120 13 0.12 0.08 0.057 0.000 0.00 0.268300700 0.032S/13E-30F01 4/22/2020 500 64 68 2.1 44.0 1984 120 13 0.15 0.08 0.033 0.000 0.00 0.268400719 0.032S/13E-30F01 10/14/2019 460 62 69 2.0 43.0 1882 120 13 0.11 0.09 0.046 0.000 0.00 0.298200696 0.132S/13E-30F01 4/10/2019 480 61 60 2.1 41 1985 120 13 0.12 0.09 0.06 ND ND 0.1985NDND693 0.0432S/13E-30F01 10/10/2018 460 62 72 2.3 44 2184 120 13 0.09 0.09 0.034 ND ND 0.1684NDND696 ND32S/13E-30F01 4/12/2018 470 58 69 2.3 44 2182 110 12 0.14 0.09 0.030 ND ND 0.2382NDND699 ND32S/13E-30F01 10/11/2017 500 68 67 2.2 46 2397 120 13 0.18 0.093 0.045 ND 0.018 0.2897NDND752 0.06132S/13E-30F01 4/12/2017 510 61 65 2.1 42 2085 120 13 0.12 0.074 0.062 ND ND 0.2885NDND682 0.04532S/13E-30F01 10/11/2016 480 62 72 2.3 46 2391 120 12 0.13 0.09 0.046 ND ND 0.3291NDND702 ND32S/13E-30F01 4/13/2016 460 60 70 2.3 43 2190 120 12 0.2 0.086 0.054 <0.01 <.0040 0.3090<4.1 <4.1 696 <0.03032S/13E-30F01 10/14/2015 450 58 61 2.1 39 1987 120 13 <1 0.084 <0.10 <0.01 <0.005 0.1887<10<10 700 <0.0532S/13E-30F01 4/15/2015 460 64 60 2.0 40 1990 130 12 <1 0.081 <0.1 <0.01 <0.005 0.202 90<10<10 700 <0.0532S/13E-30F01 1/14/2015 550 95 69 2 50 2498 140 12.50 <1 0.085 <0.1 <0.01 <0.005 0.298<10<10 820 <0.0532S/13E-30F01 10/14/2014 470 58 64 2 42 1984 120 10.00 <1 0.081 <0.1 <0.01 <0.005 0.284<10<10 730 <0.0532S/13E-30F01 7/30/2014 540 89 71 2 46 2494 130 13.6 <1 <0.1 <0.1 <0.01 <0.005 0.101 94<10<10 860 <0.0532S/13E-30F01 4/16/2014 610 122 78 3.3 47 22100 140 12 <1 0.100 <0.1 <0.01 <0.005 0.17 100<10<10 970 <0.0532S/13E-30F01 1/15/2014 510 80 69 2.3 45 2294 136 12.6 13.00 <0.1 <0.1 <0.01 <0.005 0.1994<10<10 810 <0.0532S/13E-30F01 10/15/2013 530 78 73 2.3 47 2286 140 12 <1 0.072 <0.1 <0.01 <.005 0.1786<10<10 830 <0.0532S/13E-30F01 7/10/2013 480 80 64 2.2 49 2285 140 12.2 <1 0.089 <0.1 <0.01 <0.005 <0.185<10<10 770 <0.0532S/13E-30F01 4/11/2013 460 60 60 2.20 38 1878 120 12 <1 0.091 <0.1 <0.01 <0.005 0.278<10<10 710 <0.0532S/13E-30F01 1/15/2013 440 65 64 2.40 40 1995 130 12 <1 0.090 <0.1 <0.01 <0.005 0.1195<10<10 720 0.0532S/13E-30F01 10/30/2012 470 60 66 2.50 43 2075 123 12 <1 0.087 <0.1 <0.01 <0.005 0.1375<10<10 720 <0.0532S/13E-30F01 7/24/2012 470 73 66 2.70 36 1886 120 13 <1 <0.1 <0.1 <0.01 0.019 0.1186<10<10 720 <0.0532S/13E-30F01 4/19/2012 450 72 52 1.90 32 1581 130 13 <1 <0.1 <0.2 <0.01 <0.005 <0.281<10<10 700 <0.132S/13E-30F01 1/10/2012 460 67 61 2.00 35 1781 120 11 <1 <0.1 0.12 <0.01 <0.005 <0.181<10<10 720 <0.132S/13E-30F01 11/17/2011 470 70 82 2.40 40 1978 120 12 <1 <0.1 <0.1 <0.01 <0.005 0.1678<10<10 720 <0.132S/13E-30F01 7/25/2011 460 66 68 4.40 37 1978 117.4 12.17 <1 0.100 0.101 <0.01 0.014 0.178 78<5<5720 0.1132S/13E-30F01 4/20/2011 460 71 69 2.60 36 1487 124 12 <1 0.180 0.11 <0.01 <0.005 0.1787<2.0 <2.0 730 NA32S/13E-30F01 1/24/2011 510 75 64 4.00 34 1883 140 11 <1.0 0.170 0.11 <0.10 <0.005 <0.183<2.0 <2.0 780 <0.132S/13E-30F01 10/21/2010 540 100 73 2.00 43 2188 120 13 <1.0 0.067 <0.1 NA <0.005 <0.388<10<10 894 <.132S/13E-30F01 7/26/2010 464 74 82.2 2.16 47.9 25.1 88.0 120 12 < 0.50 0.098 < 0.10 < 0.10 0.0817 0.37 88.0< 1.0 < 1.0 710 0.7932S/13E-30F01 4/27/2010 534 72 77.1 2.59 45.8 23.6 100 140 9.8 0.56 0.129 < 0.10 < 0.10 0.112 0.29 100< 1.0 < 1.0 780 1.0232S/13E-30F01 1/28/2010 725 140 99.9 2.70 76.4 35.8 214 170 1.6 0.84 0.120 < 0.10 < 0.10 0.112 0.56 214< 1.0 < 1.0 1,200 0.64032S/13E-30F01 10/19/2009 522 74 85.6 2.35 52.8 26.3 102 150 13 0.70 0.136 0.13 < 0.10 0.123 0.32 102< 1.0 < 1.0 770 1.3032S/13E-30F01 8/19/2009 648 92 98.9 3.84 63.1 31.9 113 190 10 0.56 NA < 0.10 0.12 1.03 0.32 113< 1.0 < 1.0 970 4.5232S/13E-30F01 5/12/2009 792 110 108 2.89 80.2 39.9 136 280 NA NA NA < 0.10 NA 0.0353 0.39 136< 1.0 < 1.0 1,200 0.281P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 175
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30F02 10/12/2020 540 52 45 2.4 76.0 30180 130 14 0.19 0.08 0.085 0.000 0.01 0.62 18000836 0.032S/13E-30F02 7/7/2020 600 53 51 2.7 83.0 33180 130 14 0.20 0.10 0.080 0.100 0.01 0.68 18044845 0.132S/13E-30F02 4/22/2020 580 52 47 2.6 78.0 31180 130 14 0.18 0.09 0.086 0.000 0.02 0.66 18000857 0.032S/13E-30F02 1/14/2020 550 53 48 2.8 84.0 32180 130 14 0.10 0.10 0.079 0.000 0.02 0.40 18000808 0.132S/13E-30F02 10/14/2019 550 51 50 2.7 83.0 32180 130 14 0.00 0.10 0.077 0.000 0.15 0.63 18000841 0.132S/13E-30F02 7/9/2019 620 51 47 2.5 82.0 35190 120 14 0.13 0.09 0.084 0.000 0.02 0.49 19000838 0.032S/13E-30F02 4/10/2019 570 53 43 2.7 78 32180 130 14 0.085 0.093 0.090 ND 0.046 0.47 180NDND852 0.0532S/13E-30F02 1/8/2019 560 52 44 2.7 80 34190 130 14 0.059 0.094 0.091 ND 0.013 0.62 190NDND845 ND32S/13E-30F02 10/10/2018 580 51 50 2.9 83 35190 130 14 0.07 0.094 0.07 ND 0.020 0.42 190NDND848 0.0732S/13E-30F02 7/10/2018 580 53 48 2.7 83 36190 130 14 0.23 0.095 0.11 ND 0.026 0.59 190NDND893 0.04532S/13E-30F02 4/12/2018 580 48 48 2.8 82 35190 120 13 0.12 0.097 0.072 ND 0.022 0.48 190NDND854 ND32S/13E-30F02 1/11/2018 580 52 51 2.7 82 36200 130 14 0.14 0.091 0.12 ND 0.032 0.68 200NDND846 ND32S/13E-30F02 10/11/2017 580 51 46 2.6 80 34200 130 14 0.16 0.094 0.083 ND 0.037 0.65 200NDND877 0.03732S/13E-30F02 7/12/2017 570 52 49 2.9 89 39200 130 13 ND 0.094 0.096 ND 0.15 0.66 200NDND861 ND32S/13E-30F02 4/12/2017 620 52 51 2.9 88 38200 130 13 ND 0.088 0.063 ND 0.022 0.67 200NDND8560.04132S/13E-30F021/10/2017 590 52 50 2.8 90 37220 140 13 ND 0.09 0.08 ND 1.1 0.6220NDND884 0.1532S/13E-30F02 10/11/2016 600 52 50 2.9 89 40220 140 13 0.089 0.09 0.074 ND 0.025 0.6220NDND886 ND32S/13E-30F02 7/20/2016 590 51 51 3.0 88 38220 130 13 0.14 0.091 0.072 <0.010 0.170 0.57 220<4.1 <4.1 880 0.03332S/13E-30F02 4/13/2016 570 51 51 2.9 89 40200 130 13 0.08 0.1 0.086 <0.010 0.014 0.60 200<4.1 <4.1 876 <0.03032S/13E-30F02 1/13/2016 610 53 51 2.9 89 38210 140 13 0.14 0.091 0.15 <0.010 0.035 0.47 210<4.1 <4.1 858 <0.03032S/13E-30F02 10/14/2015 570 49 45 2.8 80 35212 130 13 <1 0.085 <0.10 <0.01 0.20 0.39 212<10<10 890 0.07832S/13E-30F02 7/15/2015 610 50 51 2.0 88 38204 140 13 <1 0.091 <0.1 <0.01 0.048 0.30 204<10<10 890 <0.0532S/13E-30F02 4/15/2015 570 51 43 2.7 78 34200 140 13.5 <1 0.085 <0.1 <0.01 0.087 0.42 200<10<10 850 <0.0532S/13E-30F02 1/14/2015 590 51 42 2.4 80 34210 140 13 <1 0.08 <0.1 <0.01 0.014 0.324 210<10<10 860 <0.0532S/13E-30F02 10/14/2014 600 46 42 2.6 76 32310 120 12 <1 0.08 <0.1 <0.01 0.22 0.37 310<10<10 890 <0.0532S/13E-30F02 7/30/2014 580 49 46 2.6 80 35210 130 13 <1 <0.1 <0.1 <0.01 0.02 0.27 210<10<10 890 <0.0532S/13E-30F02 4/16/2014 590 49 45 3.3 68 30200 130 12 <1 0.089 <0.1 <0.01 0.011 0.44 200<10<10 890 <0.0532S/13E-30F02 1/15/2014 580 50 45 2.7 76 31190 136 13.1 13.4 <0.1 <0.1 <0.01 0.054 0.4190<10<10 890 <0.0532S/13E-30F02 10/15/2013 570 50 45 2.7 75 33190 140 12 <1 0.69 0.19 <0.01 0.099 0.38 190<10<10 890 <0.0532S/13E-30F02 7/10/2013 570 50 38 2.6 78 32190 180 <0.05 <1 0.08 0.13 <0.01 0.14 <0.1 190<10<10 880 <0.0532S/13E-30F02 4/11/2013 590 50 41 2.6 70 30190 140 14 <1 0.09 0.1 <0.01 0.082 0.43 190<10<10 880 <0.0532S/13E-30F02 1/15/2013 550 50 44 2.9 72 31200 140 13 <1 0.09 0.1 <0.01 0.011 0.32 200<10<10 880 0.1232S/13E-30F02 10/30/2012 610 48 45 3.0 79 34188 135 13 <1 0.09 <0.1 <0.01 0.06 0.31 188<10<10 890 0.01132S/13E-30F02 7/24/2012 590 56 46 3.2 69 30194 140 14 <1 <0.1 0.11 <0.01 0.038 0.27 194<10<10 880 <0.0532S/13E-30F02 4/19/2012 600 60 40 2.7 68 30200 140 14 <1 <0.1 <0.2 <0.01 0.19 0.3200<10<10 890 0.1132S/13E-30F02 1/12/2012 610 52 45 3.0 73 32200 130 12 <1 <0.1 0.25 <0.02 0.29 0.33 200<10<10 890 <0.132S/13E-30F02 11/21/2011 580 49 38 2.7 73 30190 120 13 <1 0.07 <0.1 <0.01 0.022 0.34 190<10<10 870 <0.132S/13E-30F02 7/25/2011 590 52 46 5.1 73 31190 134.3 13.19 <1 <0.1 0.127 <0.1 0.025 0.387 190<5<5900 <0.132S/13E-30F02 4/20/2011 600 54 57 4.2 74 29200 141 13 <1 0.18 0.17 <0.01 0.025 0.38 200<2.0 <2.0 920 NA32S/13E-30F02 1/24/2011 600 51 43 4.9 71 31210 140 12 <1.0 0.15 0.12 0.27 0.041 0.3210<2.0 <2.0 920 <0.132S/13E-30F02 10/28/2010 610 49 38 2.3 70 30210 130 11 <1.0 0.10 <0.1 NA 0.0094 <0.3 210<10<10 920 <0.132S/13E-30F02 7/26/2010 560 49 45.8 2.95 85.4 36.8 223 130 11 2.5 0.0928 < 0.10 0.13 0.0646 0.59 223< 1.0 < 1.0 890 < 0.10032S/13E-30F02 4/27/2010 634 51 50.3 3.12 87.9 38.6 225 130 10 0.8 0.112 < 0.10 < 0.10 0.615 0.51 225< 1.0 < 1.0 880 3.2832S/13E-30F02 1/28/2010 604 44 52.2 4.47 92.1 38.5 230 150 11 1.4 0.127 < 0.10 < 0.10 0.913 0.48 230< 1.0 < 1.0 920 4.5532S/13E-30F02 10/19/2009 566 49 49.5 2.80 88.3 37.6 240 140 11 1.0 0.0942 0.17 < 0.10 0.924 0.51 240< 1.0 < 1.0 850 2.1532S/13E-30F02 8/19/2009 614 49 51.8 3.19 87.3 36.8 225 130 11 2.00 NA 0.10 < 0.10 2.24 0.54 225< 1.0 < 1.0 920 19.432S/13E-30F02 5/12/2009 514 54 48.7 3.26 81.1 34.9 206 120 NA NA NA 0.11 NA 1.87 0.53 206< 1.0 < 1.0 890 3.2332S/13E-30F02 3/27/1996 678 49 52 3.8 98 42305 166 11.069 NA 0.16 NA NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 176
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30F02 6/9/1976 637 48 55 2.8 98 43343 172 3.9758 NA 0.1 0.5 NA NA NANANANANA NA32S/13E-30F02 1/20/1966 580 68 47 2 94 38280 152 27 NA 0.08 0.2 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 177
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30F03 10/12/2020 710 49 41 2.5 110.0 43310 170 0 0.00 0.06 0.140 0.037 0.02 0.21 31000975 0.032S/13E-30F03 7/7/2020 720 50 42 2.6 110.0 45290 170 0 0.10 0.06 0.120 0.038 0.02 0.22 29044985 0.132S/13E-30F03 4/22/2020 620 49 41 2.6 110.0 44310 170 0 0.10 0.06 0.140 0.042 0.02 0.23 31000999 0.132S/13E-30F03 1/14/2020 600 49 41 2.6 110.0 44300 170 0 0.08 0.06 0.120 0.044 0.02 0.16 30000940 0.132S/13E-30F03 10/14/2019 620 47 44 2.7 110.0 44300 170 0 0.00 0.06 0.120 0.035 0.02 0.16 30000980 0.132S/13E-30F03 7/9/2019 650 47 41 2.5 110.0 49310 170 0 0.09 0.06 0.140 0.039 0.02 0.21 31000975 0.032S/13E-30F03 4/10/2019 630 49 37 2.5 100 45310 170 ND 0.140 0.060 0.14 0.030 0.020 0.19 310NDND988 0.0532S/13E-30F03 1/8/2019 660 48 39 2.6 110 46310 170 ND 0.068 0.063 0.15 0.037 0.020 0.22 310NDND990 0.0832S/13E-30F03 10/10/2018 650 48 44 2.9 120 51310 170 ND 0.12 0.067 0.10 0.036 0.022 0.16 310NDND981 0.0532S/13E-30F03 7/10/2018 630 49 42 2.6 110 49310 170 ND ND 0.062 0.18 0.035 0.019 0.22 310NDND 1,030 ND32S/13E-30F03 4/12/2018 640 45 43 2.6 110 46300 160 ND 0.15 0.066 0.14 0.036 0.021 0.16 300NDND980 0.03532S/13E-30F03 1/11/2018 650 48 45 2.8 120 51310 170 ND 0.13 0.044 0.15 0.041 0.021 0.26 310NDND966 0.03732S/13E-30F03 10/11/2017 660 47 42 2.6 110 50320 170 ND 0.13 0.067 0.13 0.037 0.021 0.2320NDND996 0.05632S/13E-30F03 7/12/2017 750 46 44 3 120 53280 170 ND ND 0.064 0.14 0.035 0.023 0.2280NDND980 0.04632S/13E-30F03 4/12/2017 640 48 45 2.9 120 51310 170 ND ND 0.076 0.16 0.035 0.022 0.22 310NDND9720.06532S/13E-30F031/10/2017 670 49 44 2.7 120 51330 170 ND ND 0.064 0.13 0.045 0.023 0.31 330NDND993 0.1432S/13E-30F03 10/11/2016 680 48 41 2.6 110 49320 170 ND 0.11 0.056 0.13 0.042 0.02 0.22 320NDND992 ND32S/13E-30F03 7/20/2016 660 47 44 2.9 110 51320 170 <0.022 <0.080 0.062 0.12 0.032 0.023 0.20 320<4.1 <4.1 992 0.0432S/13E-30F03 4/13/2016 650 47 42 2.7 110 51310 170 <0.022 0.2 0.072 0.13 0.028 0.021 0.22 310<4.1 <4.1 981 0.0332S/13E-30F03 1/14/2016 580 49 45 2.8 120 52310 180 0.05 0.1 0.061 0.2 <0.010 0.025 0.21 310<4.1 <4.1 947 0.05432S/13E-30F03 10/14/2015 660 44 38 2.8 100 44306 160 <0.05 <1 <0.05 0.13 0.028 0.021 0.10 306<10<10 990 <0.0532S/13E-30F03 7/15/2015 670 45 45 1.9 120 51305 170 <0.05 <1 0.060 0.11 0.03 0.019 <0.1 305<10<10 990 <0.0532S/13E-30F03 4/15/2015 650 46 35 2.3 99 44300 170 <0.05 <1 0.056 0.126 0.02 0.015 0.1300<10<10 950 <0.0532S/13E-30F03 1/14/2015 670 46 36 2.2 100 45310 180 <0.05 <1 0.05 0.121 0.02 0.016 <0.1 310<10<10 950 0.0132S/13E-30F03 10/14/2014 660 41 35 3.0 99 42310 150 <0.05 <1 <0.05 <0.1 0.011 0.017 <0.1 310<10<10 990 <0.0532S/13E-30F03 7/30/2014 660 44 38 2.6 96 46300 160 <0.05 <1 0.28 0.12 0.02 0.015 <0.1 300<10<10 990 <0.0532S/13E-30F03 4/16/2014 640 44 36 3.3 55 38310 169 <0.05 <1 0.062 0.12 0.02 0.011 0.11 310<10<10 990 <0.0532S/13E-30F03 1/15/2014 650 45 35 2.5 90 41300 173 <0.05 <1 <0.05 0.13 0.01 0.015 0.12 300<10<10 990 <0.0532S/13E-30F03 10/15/2013 670 41 40 2.7 100 44280 179 <0.05 <1 <0.05 0.14 0.02 0.016 <0.1 280<10<10 990 <0.0532S/13E-30F03 7/10/2013 650 50 33 2.4 100 43290 140 13.5 <1 0.055 <0.1 0.02 0.017 0.23 290<10<10 990 <0.0532S/13E-30F03 4/11/2013 670 45 36 2.7 94 42300 170 <0.05 <1 0.06 0.13 0.02 0.016 0.12 300<10<10 990 <0.0532S/13E-30F03 1/15/2013 630 45 36 2.3 92 41295 180 <0.05 <1 0.06 0.11 <0.01 0.015 <0.1 295<10<10 980 <0.0532S/13E-30F03 10/30/2012 650 43 40 3.1 100 46280 170 <0.05 <1 0.06 <0.1 0.03 0.016 <0.1 280<10<10 990 0.0232S/13E-30F03 7/24/2012 640 51 36 2.7 81 37296 180 <0.05 <1 <0.1 0.17 <0.01 0.016 0.2296<10<10 990 <0.0532S/13E-30F03 4/19/2012 640 54 32 2.3 84 36290 180 <0.1 <1 <0.1 <0.2 0.01 0.014 <0.2 290<10<10 990 <0.132S/13E-30F03 1/12/2012 660 46 39 2.1 94 42280 160 <0.1 <1 <0.1 0.2 0.025 0.016 <0.2 280<10<10 990 <0.132S/13E-30F03 11/21/2011 650 43 33 2.6 93 39290 160 <0.05 <1 0.04 0.15 0.028 0.016 <0.1 290<10<10 960 <0.132S/13E-30F03 7/25/2011 650 47 46 5.1 73 31190 170.5 <0.05 <1 <0.1 0.155 0.02 0.025 <0.1 190<5<5900 <0.132S/13E-30F03 4/21/2011 650 48 40 3.8 91 34280 179 <0.05 <1 0.1 0.2 0.029 0.015 0.11 280<2.0 <2.0 1,000 NA32S/13E-30F03 1/24/2011 650 46 36 4.7 87 38300 170 <0.05 <1.0 0.11 0.17 0.24 0.016 <0.1 300<2.0 <2.0 990 <0.132S/13E-30F03 10/28/2010 650 46 37 2.7 100 43280 160 <0.1 <1.0 0.10 <0.1 NA 0.032 <0.3 280<10<10 1,000 0.5332S/13E-30F03 7/26/2010 608 45 43.8 2.94 107 46.8 294 160 1.3 0.84 0.0479 < 0.10 0.10 0.129 0.24 294< 1.0 < 1.0 900 7.5532S/13E-30F03 4/27/2010 668 48 40.8 2.91 101 44.7 304 160 0.21 0.84 0.0733 0.14 0.11 0.0694 0.23 304< 1.0 < 1.0 940 2.6232S/13E-30F03 1/28/2010 656 40 43.1 3.91 112 47.2 310 180 < 0.20 2.8 0.0833 0.13 < 0.10 0.287 0.21 310< 1.0 < 1.0 980 4.8032S/13E-30F03 10/19/2009 626 48 43.3 3.14 108 46.2 308 170 < 0.10 1.8 0.0646 0.22 < 0.10 0.255 0.17 308< 1.0 < 1.0 910 2.0932S/13E-30F03 8/19/2009 672 45 43.1 3.15 111 44.3 290 170 < 0.10 2.5 NA 0.14 < 0.10 0.468 0.19 290< 1.0 < 1.0 980 18.532S/13E-30F03 5/12/2009 678 49 44.8 3.32 109 42.9 276 180 NA NA NA 0.17 NA 0.146 0.18 276< 1.0 < 1.0 960 1.1632S/13E-30F03 3/27/1996 686 41 40 3.4 109 48379 197 0.0452 NA 0.13 NA NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 178
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30F03 6/7/1976 616 43 41 2.6 96 49333 190 0.0904 NA 0.05 0.5 NA NA NANANANANA NA32S/13E-30F03 1/19/1966 642 69 49 4 109 40321 182 1 NA 0.05 0.3 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 179
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30N01 10/12/2020 870 120 97 28.0 82.0 60330 160 0 0.68 0.21 0.370 0.020 0.11 1.20 330001,260 2.732S/13E-30N01 4/21/2020 810 130 110 31.0 84.0 60390 130 0 0.68 0.22 0.330 0.017 0.12 0.98 390001,340 3.032S/13E-30N01 10/15/2019 830 150 110 32.0 86.0 57330 170 0 0.66 0.22 0.320 0.018 0.12 1.30 330001,340 2.632S/13E-30N01 4/9/2019 860 160 94 30 81 59310 180 ND 0.64 0.23 0.36 0.012 0.11 1.2310NDND 1,370 2.832S/13E-30N01 10/10/2018 920 200 130 36 96 73370 140 ND 0.62 0.21 0.36 0.017 0.14 0.85 370NDND 1,500 3.032S/13E-30N01 4/11/2018 800 140 110 31 73 55290 150 ND 0.73 0.2 0.36 0.017 0.1 1.1290NDND 1,280 2.432S/13E-30N01 10/11/2017 870 150 120 31 78 57320 170 ND 0.68 0.24 0.38 0.019 0.12 1.5320NDND 1350 332S/13E-30N01 4/11/2017 960 260 160 35 92 73350 150 ND 0.84 0.23 0.42 0.015 0.14 1.5350NDND 1,690 3.932S/13E-30N01 10/12/2016 900 180 130 32 77 61290 180 ND 0.53 0.19 0.34 0.021 0.11 1.7290NDND 1420 2.732S/13E-30N01 4/12/2016 790 110 110 27 55 46230 190 0.05 0.5 0.18 0.42 0.013 0.1 1.7230<8.2 <8.2 1,190 1.732S/13E-30N01 10/15/2015 740 120 100 27 52 41250 190 <0.05 <1 0.18 0.43 0.032 0.072 1.3250<10<10 1,220 1.832S/13E-30N01 4/14/2015 930 190 130 28 69 54360 170 <0.05 1.4 0.23 0.334 0.01 0.087 1.2360<10<10 1,500 2.532S/13E-30N01 1/14/2015 845 170 110 29.0 71 54320 180 <0.05 <1 0.21 0.332 0.01 0.087 1.2320<10<10 1,360 2.332S/13E-30N01 10/15/2014 790 140 110 30.0 62 53300 160 0.68 <1 0.21 0.29 <0.01 0.084 1.2300<10<10 1,350 2.532S/13E-30N01 7/30/2014 800 150 110 27.0 61 52310 160 <0.05 <1 0.81 0.33 0.01 0.081 1.1310<10<10 1,360 2.432S/13E-30N01 4/16/2014 850 160 112 26.0 55 43310 170 <0.05 <1 0.20 0.33 0.01 0.077 1.3310<10<10 1,410 2.432S/13E-30N01 1/15/2014 790 154 110 26.0 56 45260 190 <0.05 <1 0.19 0.41 <0.01 0.077 1.4260<10<10 1,340 2.532S/13E-30N01 10/15/2013 950 200 140 32.0 74 60330 180 <0.05 <1 0.21 0.33 0.01 0.095 1.3330<10<10 1,570 2.832S/13E-30N01 7/10/2013 830 175 120 29.0 71 54310 185 <0.05 <1 0.22 0.32 0.01 0.087 0.84 310<10<10 1,430 2.332S/13E-30N01 4/10/2013 860 180 120 29.0 67 54320 180 <0.05 1.1 0.21 0.31 0.01 0.087 1.2320<10<10 1,470 2.532S/13E-30N01 1/14/2013 800 170 120 32.0 66 53280 200 <0.05 1.1 0.22 0.26 <0.01 0.09 1.2280<10<10 1,380 2.532S/13E-30N01 10/29/2012 900 180 120 34.0 77 60300 190 <0.05 <1 0.21 0.40 0.011 0.098 1.2300<10<10 1,500 2.832S/13E-30N01 7/23/2012 840 190 120 31.0 56 45266 200 <0.05 <1 0.22 0.43 <0.01 0.096 1.2266<10<10 1,370 2.332S/13E-30N01 4/18/2012 1,050 280 140 31.0 59 47330 210 <0.1 1.4 0.2 0.50 <0.01 0.078 1.3330<10<10 1,680 2.432S/13E-30N01 1/9/2012 1,050 260 170 34.0 68 52307 200 <0.05 2.7 0.21 0.41 <0.01 0.088 1.9307<10<10 1,760 2.932S/13E-30N01 11/17/2011 1,300 360 320 40 90 69390 220 <0.1 <1 0.23 0.38 0.017 0.11 2.5390<10<10 2,210 3.432S/13E-30N01 7/25/2011 1,680 445 230 42 99 81380 255.5 <0.05 1.2 0.21 <0.1 <0.01 0.12 3.016 380<5<5 2,480 4.232S/13E-30N01 4/20/2011 890 210 130 26 68 46180 215 <0.05 <1 0.24 0.39 0.013 0.086 4.57 180<2.0 <2.0 1,550 NA32S/13E-30N01 1/24/2011 870 180 100 28 84 46240 210 <0.05 <1.0 <0.1 0.34 0.12 0.24 3.63 240<2.0 <2.0 1,430 1832S/13E-30N01 10/21/2010 890 190 120 26 58 45246 200 <0.1 <1.0 <0.1 0.37 NA 0.078 2.3246<10<10 1,498 <0.132S/13E-30N01 7/27/2010 917 200 130 30.0 75.0 56.2 241 220 < 0.10 < 0.50 0.165 0.29 0.23 0.101 2.8241< 1.0 < 1.0 1,400 2.6132S/13E-30N01 4/27/2010 808 150 130 29 136 55.6 286 210 0.76 1.7 0.171 0.37 0.19 0.276 2.6286< 1.0 < 1.0 1,300 20.432S/13E-30N01 1/26/2010 902 210 155 33.5 156 66.4 307 230 < 0.10 1.7 0.317 0.30 0.12 0.333 3.2307< 1.0 < 1.0 1,500 27.332S/13E-30N01 10/20/2009 828 200 159 34.3 118 59.8 238 230 < 0.10 1.3 0.241 0.38 < 0.10 0.157 3.2238< 1.0 < 1.0 1,300 5.3332S/13E-30N01 8/20/2009 835 160 150 27.8 121 49.4 235 220 < 0.10 1.3 NA 0.37 0.12 0.228 2.9235< 1.0 < 1.0 1,400 15.932S/13E-30N01 5/11/2009 960 180 175 33.5 86.7 46.2 274 220 NA NA NA 0.36 NA 0.113 3.2274< 1.0 < 1.0 1,500 2.26P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 180
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30N02 10/12/2020 1,100 50 73 4.7 150.0 61190 510 0 0.00 0.15 0.110 0.000 0.00 0.13 190001,350 0.032S/13E-30N02 7/7/2020 1,100 50 77 4.7 160.0 62190 510 0 0.20 0.16 0.096 0.100 0.01 0.16 190881,350 0.132S/13E-30N02 4/21/2020 1,000 49 71 4.5 150.0 56190 500 0 0.22 0.15 0.120 0.000 0.00 0.13 190001,370 0.132S/13E-30N02 1/15/2020 1,100 49 77 4.9 160.0 61190 980 0 0.15 0.15 0.077 0.000 0.00 0.13 190001,300 0.132S/13E-30N02 10/15/2019 1,000 49 77 4.8 160.0 58190 510 0 0.10 0.16 0.088 0.000 0.00 0.17 190001,350 0.232S/13E-30N02 7/9/2019 940 48 73 4.6 150.0 64190 470 0 0.45 0.15 0.096 0.000 0.00 0.12 190001,340 0.032S/13E-30N02 4/9/2019 1,000 50 64 4.6 140 56190 480 0.2 0.14 0.15 0.12 ND ND 0.14 190NDND 1,350 0.0432S/13E-30N02 1/9/2019 960 50 67 4.6 150 59190 490 0.2 0.19 0.15 0.12 ND ND 0.16 190NDND 1,360 ND32S/13E-30N02 10/10/2018 940 50 75 4.9 150 64190 500 0.18 0.16 0.16 0.069 ND ND 0.09 190NDND 1,340 0.2232S/13E-30N02 7/12/2018 1,000 47 66 4.5 140 59190 480 0.19 0.19 0.14 0.099 ND ND 0.12 190NDND 1,390 0.1732S/13E-30N02 4/11/2018 1,100 46 76 4.9 160 65190 480 0.17 0.15 0.16 0.097 ND 0.007 0.14 190NDND 1,350 0.4132S/13E-30N02 1/11/2018 980 49 77 4.6 150 63190 510 0.19 0.10 0.15 0.13 ND ND 0.16 190NDND 1,330 0.232S/13E-30N02 10/11/2017 1,000 46 70 4.8 160 65200 510 0.19 0.19 0.17 0.11 ND 0.005 0.27 200NDND 1340 0.2832S/13E-30N02 7/11/2017 1,100 49 74 4.8 150 64190 480 0.2 0.13 0.15 0.08 ND 0.023 0.16 190NDND 1,360 2.032S/13E-30N02 4/11/2017 980 50 74 4.8 160 64190 510 0.2 0.12 0.14 0.14 ND ND 0.18 190NDND 1,320 0.232S/13E-30N02 1/13/2017 980 49 80 5.1 170 69200 490 0.19 0.12 0.16 0.078 ND 0.011 0.16 200NDND 1,340 0.6332S/13E-30N02 10/12/2016 1,000 50 77 5 160 69200 500 0.18 ND 0.15 0.11 ND ND 0.27 200NDND 1370 ND32S/13E-30N02 7/19/2016 1,000 48 78 5 160 68200 500 0.2191 0.17 0.15 0.11 <0.010 <0.0040 0.2200<8.2 <8.2 1,350 <0.03032S/13E-30N02 4/12/2016 1,000 44 72 4.8 150 67190 470 0.2 <0.080 0.14 0.096 <0.010 <0.0040 0.21 190<8.2 <8.2 1,390 <0.03032S/13E-30N02 1/13/2016 990 48 74 4.9 150 64190 520 0.27 0.12 0.14 0.22 <0.010 <0.0040 <0.046 190<8.2 <8.2 1,300 0.04132S/13E-30N02 10/15/2015 1,040 47 64 4.6 140 60192 480 0.72 <1 0.13 0.18 <0.01 <0.005 <0.10 192<10<10 1,350 <0.0532S/13E-30N02 7/16/2015 1,030 49 82 4.4 170 70190 480 1.4 1.52 0.15 <0.1 <0.01 <0.005 0.11 190<10<10 1,360 <0.0532S/13E-30N02 4/14/2015 840 47 61 4.3 130 58190 500 0.576 <1 0.14 <0.3 <0.01 <0.005 <0.3 190<10<10 1,330 <0.0532S/13E-30N02 1/14/2015 1,050 50 62 4.2 140 59190 520 0.40 <1 0.13 0.115 <0.01 <0.005 <0.1 190<10<10 1,320 <0.0532S/13E-30N02 10/15/2014 1,040 44 65 5.0 140 58200 440 0.77 <1 0.13 <0.1 <0.01 <0.005 <0.1 200<10<10 1,370 <0.0532S/13E-30N02 7/30/2014 1,020 45 66 4.6 140 60220 470 0.51 <1 0.10 0.13 <0.01 <0.005 <0.4 220<10<10 1,340 <0.0532S/13E-30N02 4/16/2014 1,040 46 66 5.0 120 50190 520 0.47 <1 0.14 0.1 <0.01 <0.005 <0.1 190<10<10 1,350 <0.0532S/13E-30N02 1/15/2014 1,060 45 60 4.1 120 49190 477 0.65 1.1 0.13 0.43 <0.01 <0.005 <0.2 190<10<10 1,370 <0.0532S/13E-30N02 10/15/2013 1,030 46 70 4.9 140 58190 541 0.46 <1 0.12 0.18 <0.01 <0.005 <0.2 190<10<10 1,360 <0.0532S/13E-30N02 7/10/2013 1,020 50 61 4.5 140 59185 500 0.63 <1 0.14 0.12 <0.01 <0.005 <0.1 185<10<10 1,370 <0.0532S/13E-30N02 4/10/2013 1,080 48 60 4.3 120 52185 500 0.50 <1 0.15 <0.2 <0.01 <0.005 <0.2 185<10<10 1,360 <0.0532S/13E-30N02 1/14/2013 1,010 48 63 4.5 120 53188 530 0.40 <1 0.14 <0.2 <0.01 <0.005 <0.2 188<10<10 1,350 0.0732S/13E-30N02 10/29/2012 1,030 40 68 5.0 140 58180 500 <0.25 <1 0.14 <0.5 <0.01 <0.005 <0.5 180<10<10 1,360 <0.0532S/13E-30N02 7/23/2012 1,040 54 63 4.5 110 48188 510 0.13 <1 0.15 0.15 <0.01 0.01 <0.1 188<10<10 1,360 <0.0532S/13E-30N02 4/18/2012 990 60 56 4.2 110 47190 560 0.14 <1 0.12 0.21 <0.01 <0.005 0.28 190<10<10 1,360 <0.132S/13E-30N02 1/11/2012 1,040 49 64 4.9 130 54180 460 1.30 <1 0.17 0.16 <0.02 <0.005 <0.2 180<10<10 1,360 <0.132S/13E-30N02 11/21/2011 1,020 46 57 4.5 130 54180 450 0.15 <1 0.15 <0.2 <0.01 <0.005 <0.2 180<10<10 1,360 <0.132S/13E-30N02 7/25/2011 1,050 50 81 7.7 150 62180 479.1 0.15 <1 0.16 0.144 <0.01 0.006 <0.1 180<5<5 1,370 0.4932S/13E-30N02 4/20/2011 1,030 52 63 5.4 130 44180 508 0.17 <1 0.19 0.2 <0.01 <0.005 <0.1 180<2.0 <2.0 1,380 NA32S/13E-30N02 1/24/2011 1,050 50 60 6.4 120 49190 490 0.24 <1.0 0.17 0.17 <0.10 0.064 <0.1 190<2.0 <2.0 1,380 0.1232S/13E-30N02 10/21/2010 1,040 48 52 3.5 100 45181 460 0.15 <1.0 <0.1 <0.1 NA <0.005 <0.3 181<10<10 1,377 <0.132S/13E-30N02 7/27/2010 777 57 67.6 7.31 141 58.5 190 470 0.3 3.5 0.138 < 0.10 0.11 0.102 0.28 190< 1.0 < 1.0 1,300 3.4332S/13E-30N02 4/27/2010 800 93 71.9 12.50 108 46.3 159 300 7.0 3.2 0.123 0.13 0.11 0.0776 0.7159< 1.0 < 1.0 1,100 3.2732S/13E-30N02 2/25/2010 1,000 48 71.4 4.70 141 58.1 195 490 0.16 < 0.50 0.15 0.15 < 0.10 0.0393 0.16 195< 1.0 < 1.0 1,300 3.3032S/13E-30N02 2/25/2010 1,010 74 76.9 10.2 138 55.8 195 440 0.13 2.4 0.142 0.16 < 0.10 0.0579 0.24 195< 1.0 < 1.0 1,400 1.6932S/13E-30N02 1/26/2010 970 50 74.2 4.77 152 62.2 195 510 0.14 < 0.50 0.129 0.11 < 0.10 < 0.00500 0.16 195< 1.0 < 1.0 1,300 < 0.10032S/13E-30N02 10/20/2009 2,080 690 274 151 239 101.0 220 400 < 0.10 7.0 0.201 0.16 0.87 0.398 2.0220< 1.0 < 1.0 2,800 5.5032S/13E-30N02 8/20/2009 1,350 500 199 82.2 123 49.0 199 220 6.4 6.3 NA 0.23 0.14 0.339 2.8199< 1.0 < 1.0 2,100 4.91P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 181
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30N02 5/11/2009 1,290 170 129 52 137 66.9 176 470 NA NA NA 0.18 NA 0.128 0.56 176< 1.0 < 1.0 1,800 5.2432S/13E-30N02 3/27/1996 1,050 50 71 5.5 145 60243 516 0.2033 NA 0.23 NA NA NA NANANANANA NA32S/13E-30N02 6/7/1976 1,093 48 62 4.7 150 60248 484 0 NA 0.13 0.7 NA NA NANANANANA NA32S/13E-30N02 1/21/1966 1,069 54 71 5 148 63232 483 0 NA 0.12 0.5 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 182
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30N03 10/12/2020 600 66 58 3.2 74.0 32140 140 16 0.13 0.09 0.180 0.000 0.00 0.75 14000848 0.032S/13E-30N03 7/7/2020 590 73 62 3.3 75.0 32140 140 17 0.16 0.10 0.160 0.100 0.00 0.86 14044872 0.132S/13E-30N03 4/21/2020 590 69 57 3.2 71.0 30140 140 16 0.17 0.08 0.220 0.000 0.09 0.77 14000882 0.132S/13E-30N03 1/15/2020 630 68 60 3.3 78.0 32140 140 17 0.00 0.09 0.150 0.000 0.01 0.65 14000834 0.232S/13E-30N03 10/15/2019 560 67 60 3.2 76.0 31150 140 17 0.14 0.09 0.170 0.000 0.11 0.86 15000875 0.232S/13E-30N03 7/9/2019 640 67 55 3.0 72.0 33140 130 16 0.14 0.08 0.180 0.000 0.00 0.77 14000860 0.032S/13E-30N03 4/9/2019 580 71 51 3.1 68 30150 130 16 0.18 0.09 0.2 ND 0.03 0.60 150NDND867 ND32S/13E-30N03 1/9/2019 560 69 54 3.2 72 31150 130 16 0.084 0.087 0.2 ND ND 0.71 150NDND858 ND32S/13E-30N03 10/10/2018 540 68 59 3.4 71 32150 130 16 ND 0.091 0.21 ND 0.012 0.53 150NDND847 0.03032S/13E-30N03 7/12/2018 550 62 54 3.2 69 31150 120 15 0.16 0.084 0.17 ND 0.063 0.61 150NDND866 0.07632S/13E-30N03 4/11/2018 590 62 58 3.3 72 33150 120 14 0.19 0.094 0.16 ND 0.006 0.51 150NDND839 ND32S/13E-30N03 1/11/2018 580 64 61 3.3 74 34150 140 14 0.20 0.088 0.19 ND 0.33 0.61 150NDND836 0.1232S/13E-30N03 10/11/2017 580 63 54 3.2 73 33150 130 15 0.24 0.1 0.16 ND 0.86 0.64 150NDND836 0.5932S/13E-30N03 7/11/2017 560 64 60 3.2 77 34150 140 14 0.1 0.089 0.14 ND 0.54 0.66 150NDND871 0.1832S/13E-30N03 4/11/2017 560 69 62 3.6 82 36160 140 14 0.12 0.08 0.15 ND 0.62 0.69 160NDND866 0.4332S/13E-30N03 1/12/2017 580 69 62 3.6 83 38170 150 14 0.13 0.088 0.13 ND 3.3 0.74 170NDND878 1.532S/13E-30N03 10/12/2016 580 68 62 3.5 80 37170 140 15 ND 0.088 0.16 ND 0.56 0.76 170NDND879 0.1732S/13E-30N03 7/19/2016 580 66 61 3.6 75 36160 130 14.683 0.20 0.084 0.16 <0.010 0.030 0.76 160<4.1 <4.1 864 <0.03032S/13E-30N03 4/12/2016 610 69 60 3.4 75 36160 130 14.457 0.16 0.078 0.18 <0.010 0.0095 0.78 160<4.1 <4.1 895 <0.0532S/13E-30N03 1/13/2016 570 72 62 3.4 77 35160 140 15 0.15 0.083 0.22 <0.010 0.0089 0.66 160<4.1 <4.1 867 0.07932S/13E-30N03 10/15/2015 570 63 54 3.3 69 32162 130 15 <1 0.0161 0.23 <0.01 0.015 0.56 162<10<10 860 <0.0532S/13E-30N03 7/16/2015 580 65 65 3.0 81 35160 140 15 15.3 0.079 0.14 0.45 0.011 0.46 160<10<10 880 <0.0532S/13E-30N03 4/14/2015 580 65 49 2.9 65 31160 140 15.2 <1 0.078 <0.1 <0.01 <0.005 0.47 160<10<10 860 <0.0532S/13E-30N03 1/14/2015 610 68 53 3.0 73 34170 150 15 <1 0.074 0.151 <0.01 0.0540 0.43 170<10<10 870 0.4932S/13E-30N03 10/15/2014 560 59 52 3.5 67 32160 130 14 0.54 0.066 0.14 <0.01 <0.005 0.452 160<10<10 890 <0.0532S/13E-30N03 7/30/2014 580 65 55 3.2 69 32170 130 15 <1 <0.1 0.16 <0.01 <0.005 0.34 170<10<10 910 <0.0532S/13E-30N03 4/16/2014 610 63 55 4.3 65 29170 140 13.00 <1 0.08 0.15 <0.01 0.058 0.38 170<10<10 910 <0.0532S/13E-30N03 1/15/2014 610 66 54 3.2 67 31170 149 14.8 15 <0.1 0.16 <0.01 0.065 0.46 170<10<10 910 0.2732S/13E-30N03 10/15/2013 580 60 57 3.3 71 32170 150 14 <1 0.057 0.16 <0.01 0.370 0.41 170<10<10 910 0.132S/13E-30N03 7/10/2013 590 60 48 3.1 71 31160 150 15.1 <1 0.074 0.18 <0.01 1.3 0.17 160<10<10 900 0.4332S/13E-30N03 4/10/2013 600 66 53 3.3 69 31160 150 15 <1 0.11 0.2 <0.01 0.064 0.35 160<10<10 910 <0.0532S/13E-30N03 1/14/2013 570 66 55 3.4 68 30165 150 15 <1 0.093 0.2 <0.01 0.028 0.27 165<10<10 900 0.08432S/13E-30N03 10/29/2012 610 60 56 3.7 74 33155 148 14 <1 0.081 0.2 <0.01 0.027 0.3155<10<10 900 0.0432S/13E-30N03 7/23/2012 600 71 56 3.5 61 28152 200 <0.05 <1 0.1 <0.1 <.002 0.120 0.3152<10<10 890 0.4432S/13E-30N03 4/18/2012 570 80 47 3.0 57 25150 150 16 <1 0.1 0.3 <0.01 <0.005 0.28 150<10<10 880 <0.132S/13E-30N03 1/11/2012 570 67 55 3.9 68 30140 130 14 <1 0.1 0.2 <0.02 0.0510 0.39 140<10<10 870 0.1732S/13E-30N03 11/21/2011 600 67 47 3.2 64 28140 130 15 1.2 0.088 0.2 <0.01 <0.005 0.62 140<10<10 850 <0.132S/13E-30N03 7/25/2011 590 67 47 5.0 54 24290 139.8 15 <1 <0.1 0.2 <0.01 0.0520 0.79 290<5<5890 0.1432S/13E-30N03 4/20/2011 580 76 58 4.2 62 23140 142 16 <1 0.12 0.2 <0.1 0.0510 0.92 140<2.0 <2.0 890 NA32S/13E-30N03 1/24/2011 570 76 48 4.8 55 25130 130 16 <1.0 0.12 0.2 <0.10 0.0088 1.7130<2.0 <2.0 900 <0.132S/13E-30N03 10/21/2010 550 69 59 3.3 65 31133 130 15 <1.0 <0.1 0.1 NA <0.005 1.1133<10<10 886 <0.132S/13E-30N03 7/27/2010 528 72 55.1 3.41 68.7 31.0 139 130 15.0 < 0.50 0.0672 0.14 0.11 < 0.00500 1.3139< 1.0 < 1.0 860 < 0.10032S/13E-30N03 4/27/2010 672 89 60.6 3.65 70.6 32.5 134 130 14.0 < 0.50 0.0779 0.18 0.11 < 0.00500 1.2134< 1.0 < 1.0 870 < 0.10032S/13E-30N03 1/26/2010 606 110 75.0 4.51 77.8 34.3 126 130 14 1.4 0.0654 0.15 < 0.10 0.0130 1.3126< 1.0 < 1.0 990 0.65332S/13E-30N03 10/20/2009 806 180 93.3 25.5 92.3 41.5 162 150 9.7 2.2 0.107 0.26 < 0.10 0.245 1.4162< 1.0 < 1.0 1,200 0.34432S/13E-30N03 8/20/2009 1,070 190 151 61.6 112 44.2 130 130 16 3.4 NA 0.20 < 0.10 0.151 1.6130< 1.0 < 1.0 1,700 1.9332S/13E-30N03 5/12/2009 602 97 63.4 3.96 72.9 32.2 122 120 NA NA NA 0.22 NA 24 1.2122< 1.0 < 1.0 900 2.2432S/13E-30N03 3/27/1996 624 70 62 4 78 35150 161 24.126 NA 0.13 NA NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 183
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-30N03 6/7/1976 705 90 54 2.9 99 43189 168 25.413 NA 0.08 0.5 NA NA NANANANANA NA32S/13E-30N03 1/21/1966 804 57 54 3 132 59410 250 1 NA 0.08 0.5 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 184
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-31H10 10/7/2020 660 33 35 2.6 97.0 47350 150 0 0.23 0.08 0.180 0.008 0.14 0.12 35000965 4.832S/13E-31H10 7/7/2020 510 42 51 5.0 27.0 48220 99 0 0.10 0.08 0.052 0.022 0.17 0.20 22044720 1.932S/13E-31H10 4/21/2020 430 38 50 5.3 21.0 44220 73 0 0.28 0.07 0.055 0.020 0.13 0.14 22000669 1.932S/13E-31H10 1/14/2020 520 36 42 3.7 80.0 51310 130 0 0.11 0.08 0.160 0.014 0.20 0.09 31000843 4.432S/13E-31H10 10/14/2019 630 34 42 3.9 110.0 52350 150 0 0.00 0.08 0.140 0.000 0.20 0.00 35000974 6.632S/13E-31H10 7/9/2019 650 44 50 3.4 110.0 57320 200 0 0.24 0.09 0.180 0.026 0.21 0.19 320001,030 6.032S/13E-31H10 4/9/2019 630 43 48 3.4 100 50320 200 ND 0.17 0.099 0.21 0.015 0.18 0.15 320NDND 1,040 4.832S/13E-31H10 1/8/2019 620 35 41 3.3 100 54340 160 ND 0.17 0.081 0.18 0.012 0.16 0.14 340NDND973 5.632S/13E-31H10 10/9/2018 590 33 45 5.3 88 54330 120 ND 0.20 0.075 0.11 0.011 0.16 0.08 330NDND916 6.532S/13E-31H10 7/12/2018 510 34 46 6.0 45 54300 96 ND 0.23 0.080 0.12 0.012 0.12 0.16 300NDND846 3.832S/13E-31H10 4/10/2018 690 41 51 3.5 120 55310 200 ND 0.16 0.089 0.19 0.016 0.21 0.15 310NDND 1,020 4.732S/13E-31H10 1/10/2018 660 35 44 3.3 110 56350 170 ND 0.23 0.075 0.20 0.016 0.2 0.17 350NDND 1,020 5.332S/13E-31H10 10/11/2017 640 33 41 3.1 120 57360 160 ND 0.38 0.083 0.18 ND 0.21 0.13 45089ND 1070 4.332S/13E-31H10 7/11/2017 720 36 48 3.8 120 60350 170 ND 0.17 0.09 0.15 0.011 0.17 0.13 350NDND 1,020 4.732S/13E-31H10 4/12/2017 600 39 47 3.4 120 62340 190 ND ND 0.09 0.19 0.013 0.19 0.22 340NDND 1,020 5.232S/13E-31H10 1/13/2017 670 34 45 3.4 130 60370 180 ND 0.16 0.076 0.17 0.014 0.22 0.1370NDND 1,020 7.832S/13E-31H10 10/12/2016 700 33 40 3.2 120 59380 170 ND 0.22 0.062 0.18 0.012 0.15 0.12 380NDND 1040 5.332S/13E-31H10 7/20/2016 630 33 42 4.4 99 57370 150 <0.022 0.3 0.068 0.14 <0.01 0.19 0.14 370<8.2 <8.2 991 8.932S/13E-31H10 4/13/2016 670 37 46 3.4 120 57350 180 <0.022 0.21 0.078 0.19 0.011 0.23 0.14 350<8.2 <8.2 1,030 6.732S/13E-31H10 1/13/2016 380 37 49 9.9 6.8 46170 54 <0.022 0.43 0.044 0.088 0.014 0.084 0.19 21034<4.1 603 2.232S/13E-31H10 10/14/2015 320 32 33 2.7 17 48216 68 <0.05 <1 0.089 0.12 0.016 0.098 <0.10 22711<10 600 1.432S/13E-31H10 7/15/2015 330 34 44 3.4 15 54195 81 <0.05 <1 0.082 <0.1 <0.01 0.081 <0.1 21318<10 610 0.9832S/13E-31H10 4/16/2015 660 35 33 2.7 99 48360 170 <0.05 <1 0.083 0.163 <0.01 0.17 <0.1 360<10<10 1,000 4.632S/13E-31H10 1/14/2015 760 55 56 3.0 110 50300 250 <0.05 <1 0.11 0.159 0.021 0.17 <0.1 300<10<10 1,070 4.232S/13E-31H10 10/16/2014 720 41 46 3.7 110 53330 200 <0.05 <1 0.10 <0.1 <0.01 0.17 <0.1 330<10<10 1,090 6.532S/13E-31H10 7/30/2014 660 34 35 2.4 95 49420 160 <0.05 <1 <0.1 0.16 <0.01 0.17 <0.1 420<10<10 1,040 6.532S/13E-31H10 4/17/2014 890 55 70 5.4 100 45250 380 <0.05 <1 0.15 0.12 0.01 0.31 0.13 250<10<10 1,260 4.932S/13E-31H10 1/16/2014 900 57 66 4.60 110 50240 360 <0.05 <1 0.180 0.2 0.02 0.32 <0.1 240<10<10 1,260 6.032S/13E-31H10 10/16/2013 690 30 40 3.40 100 49340 190 <0.05 <1 0.091 0.14 <0.01 0.23 <0.1 340<10<10 1,050 7.432S/13E-31H10 7/11/2013 860 60 50 4.40 110 47240 340 <0.05 <1 0.18 0.15 0.02 0.28 <0.1 240<10<10 1,230 4.932S/13E-31H10 4/11/2013 900 60 69 4.60 110 47250 350 0.82 <1 0.2 0.12 0.03 0.28 <0.2 250<10<10 1,250 5.732S/13E-31H10 1/16/2013 820 66 76 5.00 100 47260 320 <0.1 <1 0.21 0.13 <0.01 0.31 <0.2 260<10<10 1,230 4.232S/13E-31H10 10/30/2012 780 65 75 4.70 100 46255 280 <0.05 <1 0.19 0.14 0.04 0.23 <0.1 255<10<10 1,190 432S/13E-31H10 7/25/2012 830 76 80 5.30 96 45250 310 <0.05 <1 0.22 0.15 0.04 0.24 <0.1 250<10<10 1,220 6.732S/13E-31H10 4/19/2012 790 87 69 4.50 52 37250 270 <0.1 <1 0.19 0.21 0.05 0.17 <0.2 250<10<10 1,180 432S/13E-31H10 1/12/2012 760 76 85 4.00 79 40270 190 <0.1 <1 0.23 0.21 0.069 0.23 <0.2 270<10<10 1,150 4.832S/13E-31H10 11/21/2011 720 39 38 3.40 96 43320 180 <0.05 3.5 0.079 0.19 0.013 0.17 <0.1 320<10<10 1,050 4.832S/13E-31H10 7/25/2011 760 69 66 6.40 80 35310 208.8 <0.05 <1 0.16 0.17 0.041 0.23 0.199 310<5<5 1,170 5.332S/13E-31H10 1/24/2011 310 98 22 8.1 34 9.2 19.0 53 <0.05 <1.0 <0.1 0.2 4.42 0.4 0.63 19.0<2.0 <2.0 480 1032S/13E-31H10 10/28/2010 290 81 26 9.3 64 11 160.0 68 <0.1 <1.0 <0.1 0.2 NA 0.85 0.36 160.0<10<10 520 3832S/13E-31H10 7/26/2010 438 85 34.3 1.93 61.7 30.4 30.0 210 < 0.10 < 0.50 0.0435 0.58 0.22 1.46 0.32 30.0< 1.0 < 1.0 690 3632S/13E-31H10 4/26/2010 560 83 47.7 5.7 86.1 48.3 62 310 < 0.10 0.84 < 0.02 < 0.1 0.56 2.54 0.31 62.0< 1.0 < 1.0 880 23332S/13E-31H10 1/27/2010 460 130 45.0 25.4 682 124 112 100 0.56 NA < 0.0200 0.21 0.25 32.4 0.49 112.0< 1.0 < 1.0 760 4,36032S/13E-31H10 10/20/2009 362 92 39.6 2.92 19.2 45.1 76.8 110 < 0.10 < 0.50 0.0697 < 0.10 < 0.10 0.242 0.39 80.03.2 < 1.0 590 11.432S/13E-31H10 8/19/2009 420 160 48.4 3.37 49.9 20.4 17.6 54 < 0.10 1.1 NA < 0.10 0.25 1.76 0.68 17.6< 1.0 < 1.0 690 24232S/13E-31H10 5/16/1983 665 35 40 NA 85 65360 90 < 4 NA NA 0.2 NA 0.01 NA360NDND950 0.10P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 185
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-31H11 10/7/2020 680 37 41 3.6 110.0 55330 200 0 0.13 0.09 0.210 0.000 0.22 0.12 330001,020 11.032S/13E-31H11 7/7/2020 410 62 69 5.2 3.1 41140 57 0 0.20 0.11 0.056 0.051 0.02 0.32 170364636 0.932S/13E-31H11 4/21/2020 450 60 59 4.4 5.1 45170 85 0 0.21 0.10 0.068 0.054 0.04 0.26 180140698 0.732S/13E-31H11 1/14/2020 680 73 76 3.6 110.0 44300 210 0 0.11 0.17 0.200 0.075 0.18 0.26 300001,070 3.832S/13E-31H11 10/14/2019 750 48 56 3.7 120.0 50320 200 0 0.00 0.11 0.160 0.027 0.24 0.15 320001,070 5.732S/13E-31H11 7/9/2019 650 61 73 4.0 110.0 52310 210 0 0.17 0.16 0.170 0.054 0.24 0.28 310001,110 5.932S/13E-31H11 4/9/2019 700 61 66 3.7 110 48300 240 ND 0.18 0.140 0.20 0.041 0.19 0.27 300NDND 1,140 3.732S/13E-31H11 1/8/2019 730 39 45 3.6 120 52340 220 ND 0.14 0.087 0.18 0.016 0.24 0.13 340NDND 1090 8.232S/13E-31H11 10/9/2018 720 37 49 3.8 130 59340 210 ND 0.24 0.091 0.15 0.015 0.23 0.08 340NDND 1,090 8.232S/13E-31H11 7/12/2018 720 36 43 3.6 120 54340 190 ND 0.27 0.082 0.17 0.014 0.25 0.15 340NDND 1,110 7.232S/13E-31H11 4/10/2018 780 73 81 3.8 110 47300 210 ND 0.090 0.17 0.18 0.066 0.24 0.40 300NDND 1,130 7.332S/13E-31H11 1/10/2018 750 39 51 3.7 130 57340 220 ND 0.17 0.089 0.20 0.021 0.28 0.16 340NDND 1,090 5.932S/13E-31H11 10/11/2017 720 38 45 3.7 120 56350 200 ND 0.22 0.13 0.18 0.015 0.22 0.14 350NDND 1080 5.632S/13E-31H11 7/11/2017 820 43 53 3.9 130 58320 230 ND 0.11 0.11 0.13 0.018 0.29 0.19 320NDND 1,100 9.732S/13E-31H11 4/12/2017 720 45 53 3.8 120 56320 250 ND ND 0.11 0.17 0.022 0.25 0.18 320NDND 1,100 6.332S/13E-31H11 1/13/2017 750 44 57 4 130 58340 240 ND 0.11 0.11 0.13 0.024 0.29 0.15 340NDND 1,100 7.2032S/13E-31H11 10/12/2016 780 41 49 3.9 120 57350 220 ND 0.12 0.097 0.16 0.021 0.28 0.16 350NDND 1100 8.1032S/13E-31H11 7/20/2016 420 120 64 6.8 4.3 3860 39 <0.022 0.097 0.12 0.059 0.084 0.084 0.598929<4.1 617 9.032S/13E-31H11 4/13/2016 410 110 64 604 3.9 4051 56 <0.022 <0.080 0.11 0.058 0.084 0.053 0.589241<4.1 628 6.732S/13E-31H11 1/13/2016 450 120 70 7.7 4.5 3649 65 <0.022 <0.080 0.11 0.095 0.11 0.072 0.768637<4.1 675 8.632S/13E-31H11 10/14/2015 350 110 69 9.2 3.7 3142 74 <0.05 <1 0.16 <0.10 0.099 0.036 0.447533<10 670 5.732S/13E-31H11 7/15/2015 380 120 85 11.0 4.3 3540 85 <0.05 <1 0.19 <0.1 0.1 0.05 0.409 6525<10 690 9.632S/13E-31H11 4/16/2015 400 120 66 7.6 4.9 3654 100 <0.05 <1 0.17 <0.1 0.088 0.039 0.481 7622<10 700 6.632S/13E-31H11 1/14/2015 420 125 68 7.0 6.4 3745 126 <0.05 <1 0.15 <0.1 0.097 0.038 0.396520<10 720 3.532S/13E-31H11 10/16/2014 370 120 78 13.0 4.2 2953 77 <0.05 <1 0.17 <0.1 0.11 0.040 0.3588<10<10 740 4.532S/13E-31H11 7/30/2014 450 120 71 4.4 9.6 4353 130 0.13 <1 0.15 0.12 0.1 0.078 0.297320<10 800 832S/13E-31H11 4/17/2014 370 120 89 14.0 2.4 1776 39 <0.05 <1 0.16 <0.1 0.12 0.03 0.43 12145<10 720 3.732S/13E-31H11 1/16/2014 350 122 89 15 2 1868 42 <0.05 <1 0.17 0.1 0.09 0.026 0.48 12557.5 <10 710 2.332S/13E-31H11 10/16/2013 360 100 98 20 3.1 1566 36 <0.05 <1 0.19 <0.1 0.11 0.057 0.38 13973<10 710 4.132S/13E-31H11 7/11/2013 370 140 70 6.3 4 2382 40 0.4 <1 0.2 0.11 0.11 0.043 0.44 11735<10 730 3.232S/13E-31H11 4/11/2013 340 90 81 14 2.9 1878 30 <0.05 <1 0.19 0.12 0.07 0.046 0.315577.5 <10 650 3.232S/13E-31H11 1/16/2013 360 107 99 7.1 3.3 24110 36 <0.05 <1 0.25 <0.1 <0.01 0.048 0.416555<10 720 3.732S/13E-31H11 10/30/2012 380 97 100 6.4 4.5 24130 38 <0.05 <1 0.28 <0.1 0.1 0.09 0.216838<10 720 6.132S/13E-31H11 7/25/2012 240 49 56 11 5.4 2299 43 <0.05 <1 0.16 0.19 0.023 0.11 <0.1 13233<10 470 6.632S/13E-31H11 4/19/2012 380 100 87 5.5 3.5 26150 79 <0.1 <1 0.27 0.26 0.09 0.033 0.68 18030<10 750 1.632S/13E-31H11 1/12/2012 480 96 110 4.9 5.6 33154 95 <0.1 <1 0.28 <0.2 0.11 0.01 0.306 18026<10 850 0.232S/13E-31H11 11/21/2011 390 90 78 4.6 5.2 24111 86 <0.05 <1 0.19 0.13 0.092 0.014 0.28 12817<10 720 0.532S/13E-31H11 7/25/2011 260 29 23 5.3 8.7 2084 80 <0.05 <1 <0.1 0.199 0.072 0.041 <0.189<5<5440 2.732S/13E-31H11 4/21/2011 580 118 70 19 49 178.8 274 <0.05 <1 <0.1 0.29 0.109 0.091 0.4 11.32.5<2.0 950 NA32S/13E-31H11 1/24/2011 680 110 60 17 64 225.0 330 <0.05 <1.0 <0.1 0.22 0.96 0.16 0.31 11.26.2<2.0 1,040 10.032S/13E-31H11 10/21/2010 770 100 68 12 88 31 14.0 380 <0.1 <1.0 <0.1 0.28 NA 0.054 <0.3 14.0<10<10 1,163 2.232S/13E-31H11 7/26/2010 783 130 80.1 8.58 142 42.0 2.8 450 < 0.10 < 0.50 < 0.0200 0.26 0.31 3.97 0.82.8< 1.0 < 1.0 1,200 59332S/13E-31H11 4/26/2010 1,130 160 70.2 6.48 208 50.7 8.4 530 < 0.10 0.56 < 0.02 0.23 0.54 3.10 1.08.4< 1.0 < 1.0 1,600 38332S/13E-31H11 1/27/2010 1,740 430 55.6 4.98 282 43.0 < 1.0 680 < 0.10 < 0.50 0.0819 0.14 0.41 9.41 2.0 < 1.0< 1.0 < 1.0 2,300 17032S/13E-31H11 10/20/2009 2,250 1,000 19.5 2.40 487 22.5 5.0 410 < 0.10 0.98 0.0532 0.13 < 0.10 13.1 4.55.0< 1.0 < 1.0 3,100 23632S/13E-31H11 8/19/2009 322 150 93.2 16.7 23.9 12.1 3.0 4.0 < 0.10 1.3 NA 0.19 0.5 0.7 0.74 23.020.0 < 1.0 640 15332S/13E-31H11 5/16/1983 840 80 90 NA 100 50250 160.0 < 4 NA ND 0.2 NA 0.14 NA 250.0NDND 1,200 0.10P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 186
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-31H12 4/21/2011 410 97 100 7.2 3.5 2180 134 <0.05 <1 0.23 0.18 0.097 0.065 0.42 10020<2.0 770 NA32S/13E-31H12 1/24/2011 440 92 90 9.2 3.4 2790 140 <0.05 <1.0 0.25 0.11 0.94 0.041 0.35 11020<2.0 810 2.232S/13E-31H12 10/21/2010 460 90 110 15 6.8 3294 140 <0.1 <1.0 0.2 0.1 NA 0.1 0.38 12430<10 868 3.532S/13E-31H12 7/26/2010 478 83 109 5.94 52.9 30.4 122.0 94 < 0.10 <0.50 0.255 < 0.10 0.41 0.477 0.56 130.08.0 < 1.0 730 61.032S/13E-31H12 4/26/2010 452 83 83 7.42 29.3 34.5 72.0 190 < 0.1 0.56 0.134 < 0.10 0.65 0.702 0.4 86.014.0 < 1.0 810 71.032S/13E-31H12 1/27/2010 496 71 92.2 10.6 22.9 39.1 13.0 230 <0.10 < 0.50 0.323 < 0.10 0.20 0.604 0.29 51.038.0 < 1.0 780 54.432S/13E-31H12 10/20/2009 564 71 80.8 8.63 33.2 49.8 49.6 310 <0.10 < 0.50 0.148 < 0.10 < 0.10 0.337 0.32 64.014.4 < 1.0 850 20.032S/13E-31H12 8/19/2009 522 180 148 71.6 95.2 8.42 30.0 3.5 <0.10 1.7 NA 0.24 0.52 2.36 0.76 170140 < 1.0 1,000 27832S/13E-31H12 5/16/1983 630 40 40 NA 90 50330 80 < 4 NA NA 0.1 NA 0.02 NA330NDND900 0.05P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 187
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-31H13 10/7/2020 530 100 98 4.3 3.8 31180 0 0 0.00 0.22 0.063 0.059 0.07 0.32 210320685 0.932S/13E-31H13 7/7/2020 500 110 100 4.4 3.2 29180 2 0 0.20 0.21 0.054 0.069 0.05 0.35 200254729 0.232S/13E-31H13 4/21/2020 470 100 100 4.8 2.6 30180 0 0 0.08 0.20 0.064 0.079 0.05 0.36 220370721 0.432S/13E-31H13 1/14/2020 430 120 110 4.6 3.3 29190 10 0 0.00 0.25 0.084 0.094 0.05 0.28 220350730 0.432S/13E-31H13 10/14/2019 280 99 93 4.7 2.7 32180 1 0 0.00 0.18 0.064 0.066 0.05 0.30 210370675 0.332S/13E-31H13 7/9/2019 500 90 83 4.7 3.7 36170 1 0 0.08 0.16 0.062 0.059 0.08 0.35 200260654 2.932S/13E-31H13 4/9/2019 460 100 79 4.0 3.8 34180 8 ND 0.05 0.18 0.075 0.055 0.07 0.31 21027ND690 2.132S/13E-31H13 1/8/2019 400 99 79 4.3 6.7 42180 19 ND 0.06 0.17 0.057 0.057 0.13 0.29 20019ND703 2.232S/13E-31H13 10/9/2018 400 84 79 4.2 4.9 43190 13 ND 0.052 0.16 0.043 0.045 0.083 0.18 22023ND678 2.132S/13E-31H13 7/12/2018 470 81 72 3.9 3.9 38190 13 ND 0.096 0.14 0.041 0.045 0.064 0.31 22025ND699 0.8632S/13E-31H13 4/10/2018 490 82 78 3.8 4.5 44190 20 ND ND 0.14 0.039 0.041 0.083 0.30 22030ND676 4.232S/13E-31H13 1/10/2018 430 75 75 3.8 4.3 38190 7.2 ND ND 0.14 0.050 0.046 0.07 0.25 21026ND626 2.532S/13E-31H13 10/11/2017 390 77 70 3.7 4.9 38190 15 ND 0.11 0.16 0.034 0.039 0.079 0.28 22029ND648 1.132S/13E-31H13 7/11/2017 390 76 80 3.9 7.8 45190 30 ND ND 0.15 0.033 0.036 0.13 0.28 21019ND680 2.232S/13E-31H13 4/12/2017 430 79 87 4.4 4 44180 21 ND 0.13 0.17 0.024 0.043 0.77 0.28 22040ND667 4.532S/13E-31H13 1/13/2017 480 81 95 4.7 3.9 41190 14 ND ND 0.19 0.037 0.056 0.065 0.31 22033ND652 3.332S/13E-31H13 10/12/2016 410 80 87 4.3 4.2 43190 22 ND ND 0.18 0.04 0.055 0.072 0.29 22033ND678 2.332S/13E-31H13 7/20/2016 510 91 99 5.1 2.4 34170 19 <0.022 <0.080 0.22 0.043 0.054 0.038 0.43 21044<4.1 694 1.232S/13E-31H13 4/13/2016 450 94 99 4.6 2.5 33150 25 <0.022 <0.080 0.22 0.054 0.045 0.035 0.44 20051<4.1 701 1.232S/13E-31H13 1/13/2016 460 99 97 4.8 2.6 32150 30 <0.022 <0.080 0.19 0.084 <0.010 0.038 0.53 19043<4.1 717 0.3332S/13E-31H13 10/14/2015 370 85 91 4.8 3.1 32159 45 <0.05 <1 0.23 <0.10 0.060 0.043 0.26 18930<10 710 0.3032S/13E-31H13 7/15/2015 390 90 99 4.4 2.7 34145 55 <0.05 <1 0.21 <0.1 0.06 0.034 0.24 18540<10 730 0.2432S/13E-31H13 4/16/2015 360 89 86 4.8 2.6 31137 58 <0.05 <1 0.20 <0.1 0.057 0.030 0.266 17235<10 680 0.4232S/13E-31H13 1/14/2015 390 90 84 4.8 2 31140 61 <0.05 <1 0.18 <0.1 0.059 0.035 0.24 17030<10 670 0.4732S/13E-31H13 10/16/2014 370 80 84 5.0 3.2 32146 59 <0.05 <1 0.19 <0.1 0.055 0.044 0.18 17024<10 720 0.6132S/13E-31H13 7/30/2014 380 86 81 4.2 3.6 35158 61 <0.05 <1 0.16 <0.1 0.05 0.047 0.17 17517<10 730 0.2532S/13E-31H13 4/17/2014 380 84 86 5.2 3 26120 87 <0.05 <1 0.18 <0.1 0.08 0.032 0.314323<10 730 0.4532S/13E-31H13 1/16/2014 390 89 91 5.0 4.1 34119 103 <0.05 <1 0.20 <0.1 0.06 0.043 0.34 13617<10 740 0.3032S/13E-31H13 10/16/2013 410 84 87 4.7 5.3 33114 130 <0.05 <1 0.17 <0.1 0.08 0.053 0.312410<10 760 0.2832S/13E-31H13 7/11/2013 420 80 70 4.8 4.5 35116 120 <0.05 <1 0.19 <0.1 0.06 0.047 0.21 13620<10 760 0.1932S/13E-31H13 4/11/2013 450 77 77 4.7 5.8 38113 150 <0.05 <1 0.19 <0.1 0.06 0.069 0.212815<10 780 0.1532S/13E-31H13 1/15/2013 420 74 78 4.7 7.0 40110 180 <0.05 <1 0.18 <0.1 <0.01 0.087 <0.1 12515<10 810 0.5532S/13E-31H13 10/30/2012 380 88 99 5.7 3.3 30160 63 <0.05 <1 0.25 <0.1 0.08 0.035 0.31687.5<10 740 0.3332S/13E-31H13 7/25/2012 390 108 107 5.5 2.7 2913 66 <0.05 <1 0.28 <0.1 0.079 0.0037 0.23 168155<10 750 0.8432S/13E-31H13 4/19/2012 390 110 83 4.3 2.5 26400 68 <0.1 <1 0.22 0.23 0.09 0.032 0.39 42020<10 790 0.2432S/13E-31H13 1/12/2012 410 94 95 4.5 3.0 28300 68 <0.1 <1 0.24 <0.2 0.1 0.032 0.31 32020<10 760 0.8932S/13E-31H13 11/21/2011 410 94 83 4.6 3.4 30152 72 <0.05 <1 0.21 <0.1 0.09 0.035 0.31608<10 730 0.6532S/13E-31H13 7/25/2011 420 90 84 7.1 4.4 31148 91.8 <0.05 <1 0.20 <0.1 0.071 0.046 0.297 1502.5<5760 1.9032S/13E-31H13 4/21/2011 380 88 110 6.3 4.0 27140 101 <0.05 <1 0.41 0.14 0.07 0.13 0.33 140<2.0 <2.0 750 N/A32S/13E-31H13 1/24/2011 430 83 73 6 6.3 31160 100 <0.05 <1.0 0.22 0.11 0.66 0.078 0.28 160<2.0 <2.0 780 0.4932S/13E-31H13 10/21/2010 410 87 100 3.9 6.0 33148 100 <0.1 <1.0 0.14 <0.1 NA 0.087 <0.3 148<10<10 796 0.6632S/13E-31H13 7/26/2010 446 94 93.0 8.81 10.2 32.0 38.4 120 < 0.10 < 0.50 0.142 < 0.10 0.32 0.196 0.48 56.017.6 < 1.0 700 22.432S/13E-31H13 4/26/2010 416 96 87.6 9.86 14.8 37.1 46.0 150 < 0.1 0.63 0.132 < 0.10 0.39 0.579 0.44 58.012.0 < 1.0 780 56.232S/13E-31H13 1/27/2010 498 89 79.6 10.2 15.6 38.0 31.0 180 < 0.10 0.56 0.132 < 0.10 0.19 0.283 0.38 51.020.0 < 1.0 810 23.632S/13E-31H13 10/20/2009 446 100 97.1 12.8 16.4 37.9 26.6 180 < 0.10 0.56 0.168 0.2 < 0.10 0.180 0.42 42.616.0 < 1.0 760 18.932S/13E-31H13 8/19/2009 426 160 101 18.9 93.2 29.1 64.4 36 < 0.10 0.98 NA 0.2 0.31 5.490 0.60 84.420.0 < 1.0 790 68232S/13E-31H13 5/16/1983 770 60 70 NA 90 70330 120 9 NA NA 0.1 NA 0.02 NA330NDND 1,100 0.24P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 188
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l32S/13E-31H09 10/13/2020 670 46 46 2.5 110.0 47350 170 0 0.00 0.07 0.130 0.017 0.03 0.17 350001,050 0.232S/13E-31H09 7/7/2020 780 44 49 2.6 120.0 53370 170 0 0.20 0.07 0.110 0.018 0.04 0.13 370881,060 0.232S/13E-31H09 4/21/2020 620 42 48 2.7 120.0 50380 170 0 0.19 0.07 0.160 0.018 0.04 0.14 380001,070 0.332S/13E-31H09 1/14/2020 670 44 50 2.8 130.0 52350 170 0 0.11 0.08 0.130 0.021 0.04 0.16 350001,010 0.332S/13E-31H09 10/15/2019 670 43 51 2.7 120.0 50360 170 0 0.10 0.07 0.110 0.016 0.04 0.16 360001,060 0.232S/13E-31H09 4/9/2019 620 43 44 2.5 110 50360 170 ND 0.11 0.08 0.14 0.013 0.033 0.14 360NDND 1,060 0.0532S/13E-31H09 1/8/2019 690 44 44 2.6 110 52370 170 0.047 0.11 0.075 0.16 0.018 0.035 0.15 370NDND 1,060 0.08032S/13E-31H09 10/9/2018 690 42 46 2.7 110 54360 170 0.03 0.15 0.067 0.11 0.017 0.035 0.09 360NDND 1,080 0.04232S/13E-31H09 7/10/2018 630 46 47 2.6 120 53360 170 ND 0.11 0.073 0.13 0.018 0.032 0.17 360NDND 1,100 0.04132S/13E-31H09 4/10/2018 700 44 45 2.5 110 51360 170 0.074 0.11 0.068 0.13 0.016 0.035 0.17 360NDND 1,060 0.1032S/13E-31H09 1/10/2018 680 40 46 2.6 120 53360 160 ND 0.14 0.062 0.16 0.019 0.048 0.14 360NDND 1,040 0.3832S/13E-31H09 10/11/2017 640 40 47 2.6 120 55370 160 0.024 0.12 0.079 0.13 0.016 0.046 0.13 370NDND 1020 0.3432S/13E-31H09 7/11/2017 750 40 48 2.8 120 56360 170 ND ND 0.075 0.11 0.015 0.057 0.15 360NDND 1,050 0.4232S/13E-31H09 4/12/2017 620 42 52 3.1 130 60360 170 0.037 ND 0.082 0.17 0.017 0.05 0.14 360NDND 1,040 0.3032S/13E-31H091/11/2017 640 61 53 3 100 48320 150 ND ND 0.071 0.16 0.02 0.05 0.24 320NDND976 0.4032S/13E-31H09 10/12/2016 720 46 49 2.8 120 56370 170 0.029 0.18 0.069 0.12 0.021 0.041 0.18 370NDND 1070 0.3632S/13E-31H09 7/20/2016 680 45 50 2.9 120 56370 160 0.0407 0.14 0.075 0.15 0.013 0.049 0.16 370<8.2 <8.2 1,060 0.3332S/13E-31H09 4/13/2016 670 43 48 2.9 110 57350 160 <0.022 0.2 0.062 0.14 0.012 0.056 0.18 350<8.2 <8.2 1,040 0.4632S/13E-31H09 1/12/2016 630 48 48 2.8 110 54350 180 0.051 0.14 0.042 0.24 0.017 0.047 0.36 350<8.2 <8.2 1,100 0.4632S/13E-31H09 10/14/2015 680 43 44 3.1 100 50360 160 <0.05 <1 0.089 0.28 0.02 0.033 <0.10 360<10<10 1,060 0.1832S/13E-31H09 7/15/2015 680 43 52 2.4 120 56360 170 <0.05 <1 0.079 0.11 0.01 0.033 <0.1 360<10<10 1,070 0.1332S/13E-31H09 4/16/2015 680 49 41 2.4 100 47350 170 <0.05 <1 0.068 0.114 <0.01 0.039 <0.1 350<10<10 1,030 0.4732S/13E-31H09 10/16/2014 670 40 43 2.8 110 50 3500 150 <0.05 <1 0.055 0.103 <0.01 0.03 <0.1 350<10<10 1,060 0.06432S/13E-31H09 7/30/2014 670 43 43 2.2 110 48360 160 <0.05 <1 <0.1 0.15 <0.01 0.029 <0.1 360<10<10 1,070 0.05732S/13E-31H09 4/15/2014 680 42 43 3.3 87 43340 170 <0.05 <1 0.09 0.11 <0.01 0.023 <0.1 340<10<10 1,070 0.0532S/13E-31H09 1/16/2014 680 45 42 2.6 100 46360 171 <0.05 <1 <0.05 0.13 <0.01 0.032 <0.1 360<10<10 1,060 0.1832S/13E-31H09 10/16/2013 670 40 44 2.6 100 47350 180 0.47 <1 <0.05 0.15 <0.01 0.03 <0.1 350<10<10 1,053 0.1132S/13E-31H09 7/10/2013 670 44 43 2.8 110 52350 180 <0.05 <1 0.072 0.12 <0.01 0.032 <0.1 350<10<10 1,070 0.1132S/13E-31H09 4/11/2013 720 43 40 2.7 98 46350 170 <0.05 <1 0.072 0.14 <0.01 0.029 <0.1 350<10<10 1,070 0.1232S/13E-31H09 1/16/2013 660 43 43 2.7 100 47360 180 <0.05 <1 0.07 0.1 <0.01 0.031 <0.1 360<10<10 1,060 0.13032S/13E-31H09 10/30/2012 660 40 44 2.9 110 49345 170 <0.05 <1 0.071 0.14 <0.01 0.03 <0.1 345<10<10 1,070 0.08632S/13E-31H09 7/24/2012 700 47 44 2.8 93 45356 180 <0.05 <1 <0.1 0.17 <0.01 0.029 <0.1 356<10<10 1,070 0.66032S/13E-31H09 4/25/2012 680 48 44 2.7 95 43350 200 <0.1 <1 <0.1 0.26 <0.01 0.032 <0.2 350<10<10 1,070 0.20032S/13E-31H09 1/10/2012 690 45 44 2.6 100 44340 160 <0.05 <1 <0.1 0.2 <0.01 0.024 <0.1 340<10<10 1,070 0.10032S/13E-31H09 11/22/2011 690 41 39 2.7 100 46350 160 <0.1 <1 0.046 <0.2 0.013 0.03 <0.2 350<10<10 1,010 0.032S/13E-31H09 7/25/2011 690 44 39 4.5 86 40340 166.9 <0.05 <1 <0.1 0.145 <0.01 0.026 <0.1 340<5<5 1,070 <0.1P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 189
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l12N/36W-36L01 10/11/2020 940 39 67 3.3 130.0 44180 440 0 0.14 0.16 0.046 0.000 0.00 0.10 180001,180 0.112N/36W-36L01 7/8/2020 1,000 40 71 3.5 130.0 46180 430 0 0.20 0.17 0.051 0.100 0.01 0.13 180881,190 0.112N/36W-36L01 4/22/2020 880 38 65 3.3 120.0 42180 420 0 0.14 0.16 0.034 0.000 0.00 0.08 180001,210 0.112N/36W-36L01 1/15/2020 960 39 70 3.6 140.0 45180 420 0 0.13 0.18 0.056 0.000 0.00 0.09 180001,140 0.112N/36W-36L01 10/15/2019 880 38 73 3.6 140.0 45180 440 0 0.09 0.18 0.044 0.000 0.00 0.12 180001,190 0.112N/36W-36L01 7/10/2019 700 37 70 3.6 140.0 51180 430 0 0.15 0.17 0.047 0.000 0.00 0.00 180001,180 0.012N/36W-36L01 4/10/2019 870 39 64 3.5 130 48180 440 0.46 1.5 0.2 0.06 ND ND 0.14 180NDND 1,190 0.0812N/36W-36L01 1/9/2019 840 39 70 3.4 140 46180 420 0.45 0.23 0.17 0.064 ND ND 0.089 180NDND 1,200 ND12N/36W-36L01 10/10/2018 850 38 67 3.5 140 49180 430 0.43 0.16 0.16 0.03 ND ND ND180NDND 1,190 0.1912N/36W-36L01 7/10/2018 960 39 64 3.4 130 47180 430 0.50 0.11 0.17 0.12 ND ND 0.063 180NDND 1,230 ND12N/36W-36L01 4/11/2018 900 39 70 3.5 140 49180 430 0.48 0.11 0.16 0.052 ND ND 0.10 180NDND 1,190 ND12N/36W-36L01 1/11/2018 940 38 76 3.5 140 50180 440 0.37 0.19 0.17 0.073 ND ND 0.097 180NDND 1,180 ND12N/36W-36L01 10/11/2017 880 35 65 3.7 140 50190 430 0.43 0.14 0.19 0.048 ND 0.054 ND190NDND 1210 0.2312N/36W-36L01 7/12/2017 1,000 37 73 3.9 150 55180 420 0.36 0.15 0.17 0.034 ND 0.0048 ND180NDND 1,180 0.2312N/36W-36L01 4/12/2017 860 37 73 4 130 49180 420 0.45 0.14 0.17 0.017 ND 0.0087 0.06 180NDND 1,170 0.4312N/36W-36L01 1/12/2017 870 38 76 3.8 150 55190 430 0.46 0.12 0.21 0.036 ND ND 0.07 190NDND 1,180 0.1112N/36W-36L01 10/12/2016 890 35 72 3.8 140 56190 430 0.42 0.11 0.17 0.036 ND ND 0.12 190NDND 1220 0.03712N/36W-36L01 7/19/2016 920 37 69 3.6 130 50180 430 0.4292 0.25 0.15 0.043 <0.010 <0.0040 0.10 180<8.2 <8.2 1,200 <0.03012N/36W-36L01 4/12/2016 860 38 65 3.5 130 49180 390 0.5 <0.080 0.16 0.036 <0.010 <0.0040 0.12 180<8.2 <8.2 1,210 <0.0512N/36W-36L01 1/14/2016 890 36 64 3.4 130 49180 410 0.47 <0.080 0.15 0.062 <0.010 <0.0040 0.10 180<8.2 <8.2 1,210 0.07012N/36W-36L01 10/15/2015 920 37 63 4.2 120 47180 400 0.68 <1 0.15 <0.20 <0.01 <0.005 <0.20 180<10<10 1,210 <0.0512N/36W-36L01 7/16/2015 930 39 74 2.8 140 50180 410 1.2 <1 0.15 <0.1 <0.01 <0.005 <0.1 180<10<10 1,210 <0.0512N/36W-36L01 4/14/2015 890 38 55 3.1 110 44180 440 0.759 1.0 0.16 <0.2 <0.01 <0.005 <0.2 180<10<10 1,160 <0.0512N/36W-36L01 1/13/2015 880 39 59 3.0 120 45180 440 0.584 <1 0.14 <0.1 <0.01 <0.005 <0.1 180<10<10 1,160 <0.0512N/36W-36L01 10/15/2014 910 34 58 3.7 120 43180 380 0.950 <1 0.14 <0.2 <0.01 <0.005 <0.2 180<10<10 1,210 <0.0512N/36W-36L01 7/30/2014 890 36 61 3.2 120 47180 390 0.603 <1 0.12 <0.2 <0.01 <0.005 <0.2 180<10<10 1,220 <0.0512N/36W-36L01 4/16/2014 910 36 46 2.6 76 27180 440 0.77 <1 0.15 <0.1 <0.01 <0.005 <0.1 180<10<10 1,200 <0.0512N/36W-36L01 1/16/2014 910 35 60 3.1 110 42180 416 1.00 1.1 0.14 <0.2 <0.01 <0.005 <0.2 180<10<10 1,190 <0.0512N/36W-36L01 10/16/2013 910 40 63 4.5 120 43170 460 0.76 <1 0.13 <0.2 <0.01 <0.005 <0.2 170<10<10 1,210 <0.0512N/36W-36L01 7/10/2013 910 39 54 3.2 120 42175 430 0.78 <1 0.14 <0.1 <0.01 <0.005 <0.1 175<10<10 1,210 0.1812N/36W-36L01 4/11/2013 890 38 59 3.6 110 43180 420 0.82 <1 0.16 <0.2 <0.01 <0.005 <0.2 180<10<10 1,200 <0.0512N/36W-36L01 1/15/2013 870 39 61 3.4 110 41178 440 0.57 <1 0.15 <0.2 <0.01 <0.005 <0.2 178<10<10 1,190 0.1312N/36W-36L01 10/31/2012 910 35 66 4.0 130 46165 400 1.60 <1 0.16 0.2 <0.01 <0.005 <0.5 165<10<10 1,200 <0.0512N/36W-36L01 7/24/2012 880 43 65 3.9 110 41168 420 <0.05 <1 0.16 <0.1 <0.01 0.02 <0.1 168<10<10 1,190 0.1912N/36W-36L01 4/18/2012 880 47 52 3.2 95 36180 450 0.42 <1 0.12 <0.2 <0.01 <0.005 <0.2 180<10<10 1,190 <0.112N/36W-36L01 1/11/2012 790 41 64 4.1 120 44170 380 1.30 <1 0.19 0.18 <0.02 <0.005 <0.2 170<10<10 1,190 <0.112N/36W-36L01 11/21/2011 910 39 55 3.5 110 40180 380 0.37 <1 0.16 <0.2 <0.01 <0.005 <0.2 180<10<10 1,200 <0.112N/36W-36L01 7/25/2011 890 41 65 5.7 110 43170 408.9 0.39 <1 0.15 <0.1 <0.01 <0.005 <0.1 170<5<5 1,200 0.02412N/36W-36L01 4/21/2011 890 42 61 4.2 100 30170 415 0.60 <1 0.19 0.07 <0.01 <0.005 <0.1 170<2.0 <2.0 1,200 NA12N/36W-36L01 1/24/2011 890 41 55 5.1 98 36180 400 0.50 <1.0 0.20 0.15 <0.10 <0.005 <0.1 180<2.0 <2.0 1,200 <0.112N/36W-36L01 10/21/2010 910 38 76 3.6 130 47169 400 0.39 <1.0 0.10 <0.1 NA <0.005 <0.3 169<10<10 1,213 <0.112N/36W-36L01 7/27/2010 707 36 64.2 3.70 127 47.4 182 420 0.40 < 0.50 0.158 < 0.10 < 0.10 < 0.00500 0.11 182< 1.0 < 1.0 1,100 < 0.10012N/36W-36L01 4/26/2010 860 42 70.3 4.13 129 48.9 191 400 0.45 0.77 0.223 < 0.1 0.15 0.057 0.14 191< 1.0 < 1.0 1,100 4.5312N/36W-36L01 10/21/2009 856 38 72.0 4.64 131 48.2 192 420 0.49 0.84 0.150 0.12 < 0.10 0.0994 0.13 192< 1.0 < 1.0 1,100 1.6812N/36W-36L01 8/20/2009 890 39 78.0 4.21 138 48.1 184 390 0.49 0.56 NA < 0.10 < 0.10 0.185 0.14 184< 1.0 < 1.0 1,200 2.0312N/36W-36L01 5/11/2009 832 63 83.8 4.88 111 45.4 204 330 NA NA NA 0.12 NA 0.551 0.22 204< 1.0 < 1.0 1,200 4.0212N/36W-36L01 3/26/1996 882 35 66 4.8 124 47233 408 0.4518 NA 0.24 NA NA NA NANANANANA NA12N/36W-36L01 6/8/1976 936 38 72 3.5 130 48223 423 0.1355 NA 0.15 0.7 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 190
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l12N/36W-36L02 10/11/2020 870 98 98 5.4 95.0 40250 250 0 1.70 0.29 0.084 0.130 0.13 0.62 250001,190 0.012N/36W-36L02 7/8/2020 930 100 110 5.8 97.0 42260 240 0 1.80 0.31 0.093 0.130 0.14 0.65 260881,210 0.112N/36W-36L02 4/22/2020 770 100 110 6.0 97.0 40270 230 0 2.10 0.33 0.069 0.120 0.15 0.67 270001,190 0.612N/36W-36L02 1/15/2020 860 100 110 6.2 100.0 43260 240 0 1.90 0.35 0.085 0.160 0.16 0.35 260001,160 0.212N/36W-36L02 10/15/2019 780 99 120 6.3 100.0 41270 240 0 2.00 0.35 0.078 0.130 0.17 0.66 270001,210 0.512N/36W-36L02 7/10/2019 660 99 100 5.9 94.0 44260 240 0 1.90 0.33 0.096 0.150 0.15 0.60 260001,200 0.112N/36W-36L02 4/10/2019 820 100 100 5.7 96 43270 240 ND 2.0 0.32 0.094 0.13 0.15 0.5270NDND 1,220 0.1712N/36W-36L02 1/9/2019 820 100 110 6.1 99 42270 240 ND 2.2 0.33 0.099 0.14 0.15 0.5270NDND 1220 0.4212N/36W-36L02 10/10/2018 840 99 110 7.2 100 46260 240 ND 2 0.33 0.06 0.13 0.19 0.40 260NDND 1,200 5.212N/36W-36L02 7/10/2018 800 100 99 5.6 89 41260 240 ND 2.0 0.33 0.14 0.14 0.14 0.62 260NDND 1,260 0.912N/36W-36L02 4/11/2018 850 100 110 6.0 96 42260 230 0.044 1.8 0.32 0.097 0.16 0.17 0.66 260NDND 1,210 2.112N/36W-36L02 1/11/2018 800 100 110 6.3 97 44260 230 ND 2.0 0.38 0.12 0.17 0.17 0.65 260NDND 1,190 0.5112N/36W-36L02 10/11/2017 830 100 100 5.9 97 44280 230 ND 1.8 0.36 0.087 0.13 0.16 0.66 280NDND 1220 0.4112N/36W-36L02 7/12/2017 940 97 100 6.1 98 45250 230 ND 2.2 0.32 0.096 0.13 0.16 0.59 250NDND 1,200 0.7512N/36W-36L02 4/12/2017 780 97 120 6.7 98 43250 240 ND 2.2 0.35 0.082 0.14 0.16 0.51 250NDND 1,190 0.7712N/36W-36L02 1/12/2017 810 94 120 6.6 110 48270 240 ND 2 0.36 0.08 0.19 0.19 0.53 270NDND 1,200 1.112N/36W-36L02 10/12/2016 820 99 120 6.6 110 50270 240 ND 2 0.35 0.084 0.14 0.17 0.58 270NDND 1230 0.112N/36W-36L02 7/19/2016 820 97 110 6.2 95 45270 240 <0.022 2 0.33 0.081 0.1 0.15 0.65 270<8.2 <0.82 1,220 0.1412N/36W-36L02 4/12/2016 800 96 100 6 94 44270 230 <0.022 1.8 0.32 0.12 0.12 0.14 0.81 270<8.2 <0.82 1,240 0.3712N/36W-36L02 1/14/2016 860 96 110 6.4 99 47260 230 <0.018 1.6 0.34 0.10 0.078 0.17 0.65 260<8.2 <8.2 1,240 1.912N/36W-36L02 10/15/2015 800 89 96 6.0 91 0.15 266 230 <0.05 2.2 0.32 0.22 0.098 0.15 0.37 266<10<10 1,220 0.3212N/36W-36L02 7/16/2015 840 97 120 5.9 110 46260 240 <0.05 2.44 0.34 0.11 0.11 0.15 0.59 260<10<10 1,230 0.1612N/36W-36L02 4/14/2015 800 98 88 5.3 83 39270 240 <0.05 2.9 0.33 0.104 0.089 0.13 0.380 270<10<10 1,180 0.4012N/36W-36L02 1/13/2015 820 100 91 5.5 86 39250 250 <0.05 2.2 0.31 0.105 0.09 0.13 0.322 250<10<10 1,190 0.07712N/36W-36L02 10/15/2014 800 88 96 6.4 91 40260 210 <0.05 2.1 0.32 <0.1 0.092 0.14 0.358 260<10<10 1,230 0.1212N/36W-36L02 7/30/2014 800 98 99 5.8 88 39280 210 <0.05 2.4 0.28 0.11 0.09 0.14 0.19 280<10<10 1,240 0.2712N/36W-36L02 4/16/2014 820 95 89 6.3 73 31280 210 <0.05 2.3 0.31 <0.1 0.09 0.13 0.35 280<10<10 1,240 0.2212N/36W-36L02 1/16/2014 800 100 87 5 76 33270 230 <0.05 2.3 0.31 0.23 0.09 0.14 0.44 270<10<10 1,230 0.4112N/36W-36L02 10/16/2013 810 90 110 6.4 91 40260 240 <0.05 2.2 0.32 <0.1 0.1 0.15 0.32 260<10<10 1,220 0.5412N/36W-36L02 7/10/2013 790 105 94 5.8 88 38260 240 <0.05 2.5 0.34 <0.1 0.08 0.13 0.11 260<10<10 1,240 0.3112N/36W-36L02 4/11/2013 830 100 99 6.2 83 37260 220 <0.05 2.2 0.35 <0.1 0.098 0.14 0.45 260<10<10 1,240 0.6012N/36W-36L02 1/15/2013 770 110 110 6.7 84 38265 220 <0.05 2.8 0.36 <0.1 0.02 0.14 0.20 265<10<10 1,240 0.6112N/36W-36L02 10/31/2012 800 100 120 7.3 90 39265 200 <0.1 2.4 0.4 0.34 0.12 0.14 0.34 265<10<10 1,250 0.3012N/36W-36L02 7/24/2012 800 134 125 7.4 83 35277 200 <0.05 2.3 0.42 0.13 0.12 0.14 0.31 277<10<10 1,250 0.5212N/36W-36L02 4/18/2012 770 130 95 6.2 75 33270 210 0.42 4 0.35 0.36 0.12 0.13 <0.2 270<10<10 1,250 0.7712N/36W-36L02 1/11/2012 900 122 110 7.2 95 37290 170 <0.1 4.8 0.48 0.28 <0.02 0.17 0.45 290<10<10 1,250 1.8012N/36W-36L02 11/21/2011 780 130 95 6.1 77 33270 160 <0.1 <1 0.4 <0.2 <0.01 0.13 0.45 270<10<10 1,240 0.4012N/36W-36L02 7/25/2011 790 129 110 9.1 74 33280 177 <0.05 2.3 0.36 0.12 0.14 0.13 0.51 280<5<5 1,280 2.3012N/36W-36L02 4/21/2011 770 120 90 5.3 86 26280 206 <0.05 2.3 0.24 0.26 0.14 0.004 0.57 280<2.0 <2.0 1,270 NA12N/36W-36L02 1/24/2011 800 120 95 7.6 75 30300 190 <0.05 2.3 0.39 0.16 1.31 0.13 0.53 300<2.0 <2.0 1,270 1.4012N/36W-36L02 10/21/2010 770 120 130 7.6 89 44275 160 <0.1 3.4 0.48 <0.1 NA 0.15 0.54 275<10<10 1,293 0.1212N/36W-36L02 7/27/2010 737 110 121 7.81 91.1 38.9 268 190 < 0.10 < 0.50 0.427 0.10 0.77 0.180 0.80 268< 1.0 < 1.0 1,200 0.84512N/36W-36L02 4/26/2010 720 100 116 6.88 85.4 32.4 215 210 1.5 0.77 0.382 0.2 0.28 0.167 0.7215< 1.0 < 1.0 1,100 3.87012N/36W-36L02 10/21/2009 638 99 113 6.15 81.6 23.0 172 200 < 0.10 3.2 0.268 0.33 57 0.128 0.61 172< 1.0 < 1.0 940 0.25512N/36W-36L02 8/20/2009 785 100 131 6.66 89.8 36.6 290 190 < 0.10 3.8 NA 0.15 0.27 0.307 0.75 290< 1.0 < 1.0 1,200 0.83012N/36W-36L02 5/11/2009 775 120 132 7.24 84 39.7 294 180 NA NA NA 0.18 NA 0.426 0.78 294< 1.0 < 1.0 1,300 0.95812N/36W-36L02 3/26/1996 772 127 130 8.7 86 36390 148 0.0452 NA 0.5 NA NA NA NANANANANA NA12N/36W-36L02 6/8/1976 820 126 118 6.6 94 44393 184 0 NA NA 0.5 NA NA NANANANANA NAP:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 191
Appendix A: NCMA Sentry Wells Water Quality DataWellDate TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronmg/l mg/l mg/l mg/l mg/l mg/lmg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/lmg/lmg/lmg/l umhos/cm mg/l12N/35W-32C03 10/7/2020 350 64 63 2.5 13.0 654 26 8 0.00 0.11 0.066 0.000 0.00 0.185400430 0.012N/35W-32C03 7/7/2020 290 62 66 2.7 13.0 649 25 9 0.20 0.11 0.049 0.100 0.01 0.184944422 0.112N/35W-32C03 4/21/2020 300 62 63 2.6 13.0 654 27 8 0.95 0.10 0.051 0.000 0.00 0.165400446 0.012N/35W-32C03 1/14/2020 290 63 62 2.6 13.0 650 27 9 0.00 0.09 0.052 0.000 0.00 0.165000410 0.112N/35W-32C03 10/14/2019 190 60 63 2.6 12.0 648 25 9 0.00 0.10 0.043 0.000 0.00 0.184800422 0.112N/35W-32C03 7/9/2019 320 60 64 2.5 13.0 651 25 8 0.00 0.10 0.053 0.000 0.00 0.155100426 0.012N/35W-32C03 4/9/2019 320 64 60 2.7 14 6.254 28 8.4 0.09 0.10 0.06 ND 0.01 0.1654NDND446 0.35012N/35W-32C03 1/9/2019 290 64 70 2.8 14 6.253 29 8.6 0.19 0.12 0.051 ND ND 0.1853NDND440 0.03812N/35W-32C03 10/9/2018 280 62 64 2.8 14 6.250 28 8.4 0.07 0.093 0.031 ND ND 0.1350NDND446 0.08712N/35W-32C03 7/10/2018 300 64 60 2.5 13 5.854 27 8.5 ND 0.089 0.11 ND ND 0.1854NDND458 0.04712N/35W-32C03 4/10/2018 320 66 62 2.6 13 6.151 30 8.4 ND 0.087 0.047 ND ND 0.2351NDND450 0.2612N/35W-32C03 1/10/2018 320 62 67 2.7 14 6.450 27 8.2 0.11 0.09 0.073 ND ND 0.2050NDND438 0.2112N/35W-32C03 10/11/2017 320 64 63 2.8 14 6.553 28 8.4 0.11 0.11 0.04 ND 0.01 0.1753NDND445 0.612N/35W-32C03 7/11/2017 370 63 71 2.9 16 755 28 7.9 ND 0.094 0.035 ND 0.0062 0.2155NDND450 0.312N/35W-32C03 4/11/2017 300 65 66 2.8 14 6.652 28 8 ND 0.082 0.038 ND ND 0.1952NDND442 0.07712N/35W-32C03 1/13/2017 300 67 72 3 16 7.153 29 8.2 ND 0.093 0.033 ND ND 0.2153NDND449 0.07212N/35W-32C03 10/13/2016 310 64 68 2.9 14 6.553 25 8.1 0.12 0.088 0.08 ND ND 0.1853NDND433 ND12N/35W-32C03 7/20/2016 300 66 65 2.8 13 6.457 26 7.9064 <0.08 0.087 0.03 <0.010 <0.0040 0.1657<4.1 <4.1 450 0.03912N/35W-32C03 4/13/2016 290 65 66 2.8 14 6.551 26 8.1323 0.086 0.083 0.039 <0.010 <0.0040 0.2251<4.1 <4.1 438 0.0812N/35W-32C03 1/14/2016 290 69 68 2.9 14 6.350 27 8.6 <0.08 0.094 0.083 <0.010 <0.0040 0.1650<4.1 <4.1 430 0.07912N/35W-32C03 10/14/2015 280 61 57 2.6 12 5.851 28 8.4 <1 0.090 <0.10 <0.01 <0.005 <0.10 51<10<10 430 0.3312N/35W-32C03 7/14/2015 280 64 67 2.7 14 6.250 30 8.0 <1 0.10 <0.1 <0.01 <0.005 <0.150<10<10 440 0.2212N/35W-32C03 4/15/2015 280 62 52 2.4 12 5.451 30 7.8 <1 0.081 <0.1 <0.01 <0.005 0.1151<10<10 420 0.1112N/35W-32C03 1/14/2015 290 63 56 2.3 13 5.851 30 8.2 <1 0.077 <0.1 <0.01 <0.005 0.151<10<10 420 0.3812N/35W-32C03 10/16/2014 270 55 54 2.7 13 5.751 26 7.3 0.3 0.069 <0.1 <0.01 0.005 <0.151<10<10 430 0.3512N/35W-32C03 7/30/2014 280 60 58 1.9 14 6.560 29 7.3 <1 <0.1 <0.1 <0.01 <0.005 <0.16017<10 450 0.1612N/35W-32C03 4/15/2014 270 57 55 2.2 12 554 29 7.1 <1 0.096 <0.1 <0.01 <0.005 0.1154<10<10 430 0.2112N/35W-32C03 1/16/2014 300 62 57 2.8 14 6.354 35 8.1 8.2 <0.1 <0.1 <0.01 0.008 0.1254<10<10 450 0.4712N/35W-32C03 10/16/2013 310 58 62 2.9 15 6.454 38 7.5 <1 0.06 <0.1 <0.01 0.009 0.154<10<10 450 0.2112N/35W-32C03 7/11/2013 290 60 45 2.4 14 5.961 30 7.4 <1 0.071 <0.1 <0.01 0.006 <0.161<10<10 440 0.1712N/35W-32C03 4/12/2013 330 58 55 2.9 16 6.660 35 7.5 <1 0.091 <0.1 <0.01 0.019 0.160<10<10 460 0.4912N/35W-32C03 1/15/2013 290 62 57 2.8 15 6.355 38 8.3 <1 0.089 <0.1 <0.01 0.01 <0.155<10<10 470 0.2312N/35W-32C03 10/30/2012 330 57 60 3.3 19 7.560 36 7.8 <1 0.09 <0.1 <0.01 0.033 <0.160<10<10 470 1.912N/35W-32C03 7/25/2012 330 67 61 3.3 17 6.459 35 8.2 <1 <0.1 <0.1 <0.01 0.068 <0.159<10<10 460 0.4912N/35W-32C03 4/19/2012 370 74 52 2.9 30 12120 58 5 <1 0.17 0.2 <0.01 0.056 <0.2 120<10<10 580 1.3P:\Portland\672‐Northern Cities Management Area\NCMA WQ\NCMA_WQ_master.xlsx1/28/2021Item 11.a. - Page 192