CC 2019-09-10_11a 2018 NCMA Annual ReportMEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, PUBLIC WORKS DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: THE 2018 ANNUAL REPORT FOR THE NORTHERN CITIES
MANAGEMENT AREA
DATE: SEPTEMBER 10, 2019
SUMMARY OF ACTION:
The Annual Report presents an assessment of groundwater conditions based on data
collected during the 2018 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:
Expenditures associated with the 2018 annual report in the amount of $60,500 are
budgeted in the Water Fund which is paid as part of water rates.
RECOMMENDATION:
It is recommended that the City Council receive and file the 2018 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 court 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 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
THE 2018 ANNUAL REPORT FOR THE NORTHERN CITIES MANAGEMENT AREA
SEPTEMBER 10, 2019
PAGE 2
In 2009, a technical group of the NCMA jurisdictions was formed to meet on a monthly
basis to 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 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 Technical Group (NCMA TG), member agencies work together to
manage the SMGB and meet the annual reporting requirements of the Court Order.
The 2018 NCMA Annual Report, prepared by GSI Water Solutions, Inc. (GSI), was filed
with the Court in April 2019 after being reviewed by the City’s special water counsel.
ANALYSIS OF ISSUES:
NCMA Annual Report
The 2005 Stipulation, later affirmed in the 2008 Judgement, for the Santa Maria
Groundwater Basin Adjudication requires that each of the monitoring areas, identified in
the adjudication, develop a monitoring program that is sufficient to determine:
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 submitted to the Court.
The NCMA TG is currently facilitated by Water Systems Consulting, Inc. (WSC).
Together, the NCMA TG and WSC hired GSI to compile the data gathered during
quarterly groundwater monitoring and to create the 2018 NCMA Annual Report. A copy
of the full report is available for public viewing at the Arroyo Grande Public Works
Corporation Yard, 1375 Ash Street or it can be viewed on the City’s website by visiting
www.arroyogrande.org. The following list is a summary of the report’s highlights and
important information:
Item 11.a. - Page 2
CITY COUNCIL
THE 2018 ANNUAL REPORT FOR THE NORTHERN CITIES MANAGEMENT AREA
SEPTEMBER 10, 2019
PAGE 3
1. During 2018, water elevations generally declined slightly throughout most of the
NCMA basin.
2. The total water used in the NCMA in 2018 (surface, State water, groundwater,
and other water), including applied irrigation and private pumping by rural water
uses, was 8,672 acre feet (AF), compared to 8,519 AF in 2017, and is
summarized below in Table 1. Total ground water pumping was 3,558 AF which
is 37% of the 9,500 AF safe yield.
Table 1
Total Water Used in the NCMA in 2017 in Acre-Feet (AF)
Lake Lopez State Water Ground
Water
Other
Supplies Total
Arroyo Grande 2,163 0 49 59 2,212
Grover Beach 804 0 416 0 1,221
Pismo Beach 1,426 242 53 0 1,720
OCSD 480 0 246 0 725
Total Urban Use 4,873 242 764 0 5,878
Applied Irrigation 0 0 2,651 0 2,651
Rural Water Users 0 0 81 0 81
Non-potable Irrigation
by Arroyo Grande 0 0 62 0 62
Grand Total Used 4,873 242 3,558 0 8,672
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 37% of the safe yield and declining water elevations,
illustrates the impacts of the ongoing dry conditions that has reduced recharge.
3. During 2018, there were no indications of seawater intrusion.
4. Rainfall for the 2018 calendar year was approximately 72% of the long-term
average rainfall, with 11.5 inches of rain.
5. The deep well index started 2018 above the trigger value of 7.5, with an index
value of 9.56 in January 2018. In October 2018, the deep well index dropped to
6.5.
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
Item 11.a. - Page 3
CITY COUNCIL
THE 2018 ANNUAL REPORT FOR THE NORTHERN CITIES MANAGEMENT AREA
SEPTEMBER 10, 2019
PAGE 4
depression in the Cienega Valley just west of the NCMA/NMMA boundary, which
indicates that the basin has very little ability to withstand droughts, any increase in
regional pumping, or any other changes that reduces recharge, either directly or through
subsurface inflow from the east (Nipomo Mesa).
ALTERNATIVES:
The following alternatives are provided for the Council’s consideration:
1. Receive and file annual NCMA report; or
2. Provide staff other direction.
ADVANTAGES:
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 2018 Annual Report
Item 11.a. - Page 4
Northern Cities Management Area
2018 Annual Monitoring Report
Prepared for
The Northern Cities Management Area
Technical Group
City of Arroyo Grande
City of Grover Beach
Oceano Community Services District
City of Pismo Beach
April 24, 2019
Prepared by
ATTACHMENT 1
Item 11.a. - Page 5
Water Solutions, Inc.
5855 Capistrano Avenue, Suite C
Atascadero, CA 93422
P: 805.460.4621
info@gsiws.com www.gsiws.com
NCMA 2018 Annual Monitoring Report
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NCMA 2018 Annual Monitoring Report
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Northern Cities Management Area
2018 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 Nathan R. Page, PG (Utah)
Principal Hydrogeologist Consulting Hydrogeologist
Project Manager
GEI CONSULTANTS, INC.
Samuel W. Schaefer, PE
Senior Engineer
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NCMA 2018 Annual Monitoring Report
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CONTENTS
Page
Executive Summary ...................................................................................................................... 1
Groundwater Conditions ................................................................................................... 1
Groundwater Levels ................................................................................................. 1
Change in Groundwater in Storage .......................................................................... 3
Groundwater Quality ................................................................................................ 3
Water Supply and Production/Deliveries ........................................................................... 3
Threats to Water Supply ................................................................................................... 4
1. Introduction ....................................................................................................................... 6
1.1 Description of the NCMA Technical Group............................................................ 3
1.2 Coordination with Management Areas .................................................................. 3
2. Area Description ................................................................................................................ 5
2.1 Setting ................................................................................................................... 5
2.2 Precipitation ........................................................................................................... 5
2.3 Evapotranspiration ................................................................................................ 6
3. Groundwater Conditions ................................................................................................... 7
3.1 Geology and Hydrogeology ................................................................................... 7
3.2 Groundwater Flow ................................................................................................. 7
3.3 Groundwater Monitoring Network .......................................................................... 8
3.4 Groundwater Levels ............................................................................................ 10
3.4.1 Groundwater Level Contour Maps .............................................................. 10
3.4.2 Historical Water Level Trends ..................................................................... 10
3.4.3 Sentry Wells ................................................................................................ 11
3.5 Change in Groundwater in Storage ..................................................................... 13
3.6 Water Quality ....................................................................................................... 13
3.6.1 Quarterly Groundwater Monitoring ............................................................. 14
3.6.2 Analytical Results Summary ....................................................................... 14
4. Water Supply and Production/Delivery ........................................................................... 17
4.1 Water Supply ....................................................................................................... 17
4.1.1 Lopez Lake ................................................................................................. 17
4.1.2 State Water Project ..................................................................................... 20
4.1.3 Groundwater ............................................................................................... 21
4.1.4 Developed Water ........................................................................................ 22
4.1.5 Total Water Supply Availability ................................................................... 23
4.2 Water Use ........................................................................................................... 24
4.2.1 Agricultural Water Supply Requirements .................................................... 24
4.2.2 Rural Use .................................................................................................... 29
4.2.3 Urban Production for Potable Use .............................................................. 30
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4.2.4 2018 Groundwater Pumpage ...................................................................... 31
4.2.5 Changes in Water Production ..................................................................... 33
5. Comparison of Water Supply v. Water Production .......................................................... 35
6. Threats to Water Supply ................................................................................................. 37
6.1 Threats to Local Groundwater Supply ................................................................. 37
6.1.1 Declining Water Levels ............................................................................... 37
6.1.2 Seawater Intrusion ...................................................................................... 38
6.1.3 Measures to Avoid Seawater Intrusion ....................................................... 38
6.2 Threats to State Water Project Supply ................................................................ 39
6.3 Threats to Lopez Lake Water Supply .................................................................. 39
7. Management Activities .................................................................................................... 41
7.1 Management Objectives ...................................................................................... 41
7.1.1 Share Groundwater Resources and Manage Pumping .............................. 44
7.1.2 Enhance Management of NCMA Groundwater .......................................... 46
7.1.3 Monitor Supply and Demand and Share Information .................................. 47
7.1.4 Manage Groundwater Levels and Prevent Seawater Intrusion .................. 48
7.1.5 Protect Groundwater Quality ...................................................................... 50
7.1.6 Manage Cooperatively ................................................................................ 51
7.1.7 Encourage Water Conservation .................................................................. 52
7.1.8 Evaluate Alternative Sources of Supply ...................................................... 57
8. References ...................................................................................................................... 61
Tables
Page
Table 1. NCMA TG Representatives ............................................................................................ 3
Table 2. Lopez Lake (FCWCD Zone 3 Contractors) 2018 Water Allocation (AFY) .................... 17
Table 3. Lopez Lake Municipal Diversion Reduction Strategy Low Reservoir Response Plan .. 18
Table 4. Lopez Lake Downstream Release Reduction Strategy ................................................ 18
Table 5. 2018 Lopez Lake Deliveries .......................................................................................... 19
Table 6. 2018 NCMA SWP Deliveries ........................................................................................ 20
Table 7. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2018 ............... 22
Table 8. Baseline (Full Allotment) Available Urban Water Supplies (AFY) ................................. 23
Table 9. 2018 Available Urban Water Supply, (AF) .................................................................... 24
Table 10. 2018 NCMA Crop Acreages and Calculated Evapotranspiration ............................... 26
Table 11. 2018 IDC Model Results of Monthly Applied Water .................................................... 29
Table 12. Estimated Rural Water Production .............................................................................. 30
Table 13. Urban Water Production for Potable Use (Groundwater and Surface Water, AF) ...... 31
Table 14. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2018 (AF) ..... 32
Table 15. Total Water Use (Groundwater and Surface Water, AF) ............................................ 33
Table 16. 2018 Water Production by Source (AF) ...................................................................... 35
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Figures (all figures are presented at the end of the report)
Figure 1. Santa Maria Groundwater Basin
Figure 2. Northern Cities Management Area
Figure 3. Annual Precipitation 1950 to 2018
Figure 4. Location of Precipitation Stations
Figure 5. Monthly 2018 and Average Precipitation and Evapotranspiration
Figure 6. Locations of Monitoring Wells
Figure 7. Depths of Monitoring Wells
Figure 8. Groundwater Elevation Contours Spring 2018
Figure 9. Groundwater Elevation Contours Fall 2018
Figure 10. Selected Hydrographs
Figure 11. Sentry Well Hydrographs
Figure 12. Hydrograph of Deep Well Index Level
Figure 13. Water Elevation, Conductivity, and Temperature, Well 24B03
Figure 14. Water Elevation, Conductivity, and Temperature, Well 30F03
Figure 15. Water Elevation, Conductivity, and Temperature, Well 30N02
Figure 16. Water Elevation, Conductivity, and Temperature, Well 36L01
Figure 17. Water Elevation, Conductivity, and Temperature, Well 36L02
Figure 18. Water Elevation, Conductivity, and Temperature, Well 32C03
Figure 19. Change in Groundwater Elevation, April 2017 to April 2018
Figure 20. Chloride Concentrations in Monitoring Wells
Figure 21. Total Dissolved Solids Concentrations in Monitoring Wells
Figure 22. Piper Diagram of Water Quality in Select Monitoring Wells
Figure 23. Locations of Municipal Production Wells
Figure 24. NCMA Agricultural Land 2018
Figure 25. 2018 NCMA Estimated Agricultural Water Demand and Monthly Precipitation at the
SLO No. 795 Gauge
Figure 26. Municipal Water Use by Source
Figure 27. Total Water Use (Urban, Rural, Ag) by Source
Figure 28. Historical TDS, Chloride and Sodium, Index Wells and 30N03
Figure 29. Historical TDS, Chloride and Sodium, Wells 30N02, MW-Blue and 36L01
Appendices
Appendix A NCMA Sentry Well Water Level and Water Quality Data
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NCMA 2018 Annual Monitoring Report
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Executive Summary
The 2018 Annual Monitoring Report for the Northern Cities Management Area (NCMA; Annual
Report) is prepared pursuant to the requirements of the Stipulation and Judgment After Trial
(Judgment) for the Santa Maria Groundwater Basin Adjudication. The 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:
Land and water uses in the 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 2018 are documented and
discussed in this Annual Report.
Groundwater Conditions
During 2018, water elevations generally declined slightly throughout most of the NCMA portion of
the Basin in response to below average rainfall in late 2017 and throughout 2018. The exception
to this were slightly increased coastal water elevations, perhaps indicating the tail end of the
remnant westward (ocean)-bound ‘slug’ of water from the relatively wet 2016-17 rainfall year. The
relatively dry rainfall year might normally have resulted in greater declines in groundwater
elevation than was experienced; the generally observed minor decline in water levels throughout
most of the area can be attributed to ongoing efforts by all NCMA agencies to minimize
groundwater extraction and maximize surface water supply sources while maintaining the water
conservation attitudes and requirements of the recent drought.
Groundwater Levels
The best indicator of whether the NCMA portion of the basin can prevent seawater intrusion is the
water elevation in the NCMA “sentry wells” near the coastline. The average water elevations of
three of the key sentry wells make up the “Deep Well Index.” That index was developed by the
NCMA in 2007 to gauge the health of the basin. A Deep Well Index value above 7.5 feet above
sea level generally indicates that sufficient freshwater flow occurs from the east to the coastline to
prevent seawater intrusion. History has shown that a prolonged period with the Deep Well Index
level below 7.5 feet develops groundwater conditions at risk of seawater intrusion.
Spring 2018. In the mostly urbanized areas north of Arroyo Grande Creek, groundwater
contours in the spring of 2018 generally showed a westerly to southwesterly groundwater
flow (see Figure 8). These positive groundwater gradients have been developed and
maintained primarily because the NCMA agencies have collaborated on water
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management and conservation efforts. Those efforts have been in response to changes in
the Deep Well Index to ensure that flow to the ocean continues to prevent seawater
intrusion. Because of a limited number of wells and water level data in the southernmost
portion of the area dominated by sensitive-species dunes and State Parks land, the
groundwater gradient and flow are generally inferred on the basis of historical records and
trends, and water level data from the Nipomo Mesa Management Area (NMMA) farther
east.
In the central portion of the NCMA, the Cienega Valley south of Arroyo Grande Creek,
agricultural groundwater production resulted in a broad pumping trough. The water
elevations in the Cienega Valley are in the range of 6 to 13 feet NAVD881. These data
show a slight decrease in water elevations of 1.5 to 2.2 feet from April 2017 to April 2018.
Prior to 2017, the subdued pumping trough exhibited in the Cienega Valley usually
manifested itself as a closed depression, with groundwater elevations generally below
“sea level” (NAVD88) in the center of the depression. Also in recent years, a second
pumping depression has often formed north of Arroyo Grande Creek, in the area of
concentrated municipal pumping, but that historical pumping depression has not formed
since 2017. April 2018 water levels in the main production zone along the coast ranged
from 7.6 to 11 feet NAVD88.
Fall 2018. Groundwater level contours for October 2018 are presented in Figure 9.
Groundwater elevations in October 2018 were 4 to 29 feet lower than elevations in April
2018. The October 2018 groundwater elevations exhibited a return to the previously
prevalent pumping depression in the Cienega Valley, with groundwater elevations as deep
as (-)16 feet NAVD88. The groundwater elevation in the pumping depression in October
2018 was approximately 3 feet lower than was present in October 2017. October 2018
groundwater elevations in the main production zone along the coast ranged from 5.4 to
7.7 feet NAVD88.
Deep Wells. In 2018, the Deep Well Index started the year above the trigger value with an
index value of over 9 feet in January. It continued to rise, reached a high over 11 feet in
mid-March, and then began to decline. The index value 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
early November, the Deep Well Index began to rise and by late November 2018, it rose
above the threshold value where it remained through the end of the year. The index value
finished 2018 at about 9 feet NAVD88.
NCMA/NMMA Boundary. The water elevation in the San Luis Obispo County monitoring
well installed to monitor basin conditions along the NCMA/NMMA boundary typically
exhibits regular seasonal fluctuations. Similar to 2017, the water elevation in the well
remained above sea level throughout all of 2018, in contrast to the 2013 through 2016
1 North American Vertical Datum of 1988 (NAVD88). Note that NAVD88 is 2.72 feet lower than mean sea
level, as recorded at the Port San Luis tide station datum.
https://tidesandcurrents.noaa.gov/datums.html?id=9412110
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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 basin between April 2017 and
April 2018 was estimated on the basis of a comparison of water level contour maps created for
these periods. Comparison of the April water levels was chosen to comply with the California
Department of Water Resources reporting requirements under the Sustainable Groundwater
Management Act (SGMA) to calculate an annual change of groundwater in storage. The April-to-
April period used to calculate change in groundwater storage is required under SGMA
A decrease of groundwater in storage is a reflection of a net decrease in water levels across the
basin. During the period of April 2017 to April 2018, the NCMA portion of the basin experienced a
net decrease of groundwater in storage. The net decrease in groundwater levels represented a
decrease of groundwater in storage from April 2017 to April 2018 of approximately 600 acre feet
(AF) that is, there was approximately 600 AF less groundwater stored in the aquifer in April 2018
than in April 2017. This time period does not represent change in storage for the 2018 calendar
year.
Groundwater Quality
Analytical results of key water quality data (chloride, total dissolved solids [TDS], and sodium) in
2018 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 wells throughout 2018 indicate an incipient
episode or immediate threat of seawater intrusion. Incipient seawater intrusion was indicated in
2009 by elevated concentrations of TDS, sodium, and chloride (i.e. “water quality degradation”) 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
sandstone. Since TDS, sodium, and chloride concentrations declined following the 2009-2010
seasons, the location and inland extent of the seawater-fresh water interface is unknown.
Water Supply and Production/Deliveries
Total water use in the NCMA in 2018, including urban use by the NCMA agencies as well
as agricultural irrigation and private pumping by rural water users, was 8,672 AF. Except
for the water usage in 2016 and 2017, this is the lowest estimated total water use in the
past 30 years or more. Of this amount, Lopez Lake deliveries were 4,873 AF, State Water
Project deliveries totaled 242 AF, and groundwater pumping from the NCMA portion of the
Santa Maria Groundwater Basin (SMGB) accounted for approximately 3,558 AF. This is
the lowest production volume from the SMGB in more than 20 years except for 2016 and
2017. There was no municipal groundwater pumping from the Pismo Formation, outside
the SMGB, in 2018. The breakdown is shown in Table ES1 (following page).
Urban water use in 2018 among the NCMA agencies was 5,878 AF. That is the third
lowest urban water use in the past 20 years (second only to 2016 and 2017, at 5,477 and
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5,860 AF, respectively). Urban water use has ranged from 5,477 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 increased slightly since 2017. 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%, which was achieved locally by
conservation activities implemented by the NCMA agencies.
Agricultural acreage has remained fairly constant. Thus, the annual applied water
requirement for agricultural irrigation has been relatively stable though 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.
Table ES1. 2018 Water Production by Source (AF)
Urban Area Lopez Lake
(AF)
State Water
Project
(AF)
SMGB
Groundwater
(AF)
Other Supplies1
(AF)
Total
(AF)
Arroyo Grande 2,163 0 49 0 2,212
Grover Beach 804 0 416 0 1,221
Pismo Beach 1,426 242 53 0 1,720
Oceano CSD 480 0 246 0 725
Urban Water Use Total 4,873 242 764 0 5,878
Agricultural Irrigation
Applied Water 0 0 2,651 0 2,651
Rural Water Users 0 0 81 0 81
Non-potable Irrigation by
Arroyo Grande 0 0 62 0 62
Total 4,873 242 3,558 0 8,672
Notes:
1 “Other Supplies” includes groundwater pumped from outside the NCMA boundaries (which was zero in 2018)
AF = acre-feet, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District
Threats to Water Supply
Total groundwater pumping from the SMGB in the NCMA (urban, agriculture, and rural
domestic) was 3,558 AF in 2018, which is 37 percent of the calculated 9,500 acre feet per
year (AFY) long-term basin yield of the NCMA portion of the SMGB.
When pumping is less than the yield of an aquifer, groundwater in storage increases as
evidenced by rising water levels. Groundwater elevations throughout the NCMA portion of
the basin should rise significantly with several consecutive years of groundwater pumping
at 30 to 40 percent of the safe yield. Although groundwater levels increased some during
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2017 as a result of the relatively wet rainfall year, the data show that the basin is in a
tenuous position. 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, which indicates that the basin
has very little ability to withstand droughts, any increase in regional pumping, or any other
changes that reduces recharge, either directly or through subsurface inflow from the east
(Nipomo Mesa).
The well-documented pumping depression within the NMMA to the east appears to have
reduced or eliminated the historical groundwater divide between the NCMA and the
NMMA (as documented in NMMA annual reports). With the loss of this divide there has
been a reversal of groundwater gradients and the apparent development of a landward
gradient in the southern portion of the NCMA. This elimination of the groundwater divide
likely reduces the historic recharge volume of subsurface inflow into the NCMA and
creates conditions more favorable for seawater intrusion in the NCMA and NMMA.
During 2018, there were no indications of seawater intrusion.
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1. Introduction
The 2018 Annual Monitoring Report (Annual Report) summarizes hydrologic conditions for
calendar year 2018 in the Northern Cities Management Area (NCMA) of the Santa Maria River
Valley Groundwater Basin (SMGB) in San Luis Obispo County (County), California. This report
was prepared on behalf of four public agencies collectively referred to as the Northern Cities,
which includes 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) (NCMA agencies). These agencies, along with local landowners, the County, and
the San Luis Obispo County Flood Control & Water Conservation District (FCWCD) have
managed local surface water and groundwater resources in the area since the late 1970s to
preserve the long-term integrity of water supplies.
The rights to pump groundwater from the SMGB has been in litigation (adjudication) since the late
1990s. The physical solution set forth in the 2005 Stipulation and the 2008 final order established
requirements and goals for the management of the entire Santa Maria Basin. The 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 of the annual report, as directed by the Court in the Stipulation (June 30, 2005
Version, paragraph IV.D.3), stated that:
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 2018 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 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 reporting and attendant supporting information for each adjudicated
groundwater basin by April 1 of each year, the NCMA Annual Report is also published to the
California Department of Water Resources (DWR) adjudicated basin reporting website.
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 2002 Settlement Agreement between the NCMA
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agencies, Northern Landowners, and Other Parties (2002 Settlement Agreement), and
incorporated in the 2005 Stipulation for the Santa Maria Groundwater Basin Adjudication
(Stipulation). On June 30, 2005, the Stipulation was agreed upon by numerous parties, including
the NCMA agencies. The Stipulation included the 2002 Settlement Agreement. The approach
then was adopted by the Superior Court of California, County of Santa Clara, in its Judgment
After Trial, entered January 25, 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 by the NCMA agencies. The meet and confer process continued throughout
2018. The order by the Court precipitated a series of meetings and collaborative actions between
the NCMA and NMMA management areas, including the tentative formation of a Seawater
Intrusion Working Group to discuss the threat and potential solutions for possible seawater
intrusion.
The Judgment orders the stipulating parties to comply with all terms of the 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 agencies comprising the NCMA group collect and analyze
data pertinent to water supply and demand, including:
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 other sources of water supply in the NCMA
The Monitoring Program requires that the NCMA gather and compile pertinent information on a
calendar year basis; this is accomplished through data collected by NCMA agencies (including
necessary field work), the FCWCD, and requests to other public agencies. Periodic reports, such
as Urban Water Management Plans (UWMP) 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 2018 are documented and discussed in this Annual Report.
As shown in Figure 1, the NCMA represents the northernmost portion of the SMGB, as defined in
the adjudication and by DWR (DWR, 1958) as the Santa Maria River Valley Groundwater Basin
(Basin 3-12). Adjoining the NCMA to the south and east is the NMMA; the SMVMA encompasses
the remainder of the groundwater basin. Figure 2 shows the locations of the four NCMA agencies
within the NCMA.
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1.1 Description of the NCMA Technical Group
Pursuant to a requirement within the 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 (Table 1).
Table 1. NCMA TG Representatives
Agency Representative
Arroyo Grande
Bill Robeson
Public Works Director
Shane Taylor
Utilities Manager
Grover Beach
Gregory A. Ray, PE
Director of Public Works/City Engineer
R.J. (Jim) Garing, PE
Consulting City Engineer for Water and Sewer
Pismo Beach Benjamin A. Fine, PE
Director of Public Works/City Engineer
Oceano CSD
Paavo Ogren
General Manager
Tony Marracino
Utility Systems Supervisor
Arroyo Grande, Pismo Beach, and Grover Beach contract 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 full TG contracts with GSI Water Solutions, Inc. and its
sub-consulting 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.
1.2 Coordination with Management Areas
Since 1983, management of the NCMA was based on cooperative efforts of the four NCMA
agencies in continuing collaboration with the County, FCWCD, and other local and state
agencies. Specifically, the NCMA agencies have limited their pumping and, in cooperation with
the FCWCD, invested in surface water supplies so as to not exceed the accepted safe yield of the
NCMA portion of the SMGB. In addition to the efforts discussed in this 2018 Annual Report,
cooperative management occurs through many means including communication by the NCMA
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agencies in their respective public meetings, participation in the FCWCD Zone 3 Advisory
Committee and TG (related to the management and operation of Lopez Lake), and participation in
the Water Resources Advisory Council (the County-wide advisory panel on water issues). The
NCMA agencies are active participants in current and ongoing IRWM efforts and participated in
preparation and adoption of the 2007 San Luis Obispo County Integrated Regional Water
Management Plan (2007 County IRWMP) as well as 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.
Since the 2008 Judgment, the NCMA TG has taken the lead in cooperative management of its
management area. The NCMA TG has met monthly for many years and continued to do so
throughout 2018. The TG also participated in the Santa Maria Groundwater Basin Management
Area (SMGBMA) technical subcommittee, which formed in 2009. 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, reviewing and commenting on technical work efforts of other management areas,
standardization of monitoring protocols, consideration of projects and grant opportunities of joint
interest and benefit, and sharing of 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 met several times in 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 to prepare a consistent set of semiannual water level
contour maps for the NCMA and NMMA. That allows the maps from each management area to
present a mutually agreed upon condition at the NCMA/NMMA boundary. Those efforts continued
into and throughout 2018 and resulted in the development of consistent water level contouring
(and enhanced understanding of groundwater conditions) throughout the NMMA and NCMA.
An NCMA Strategic Plan was developed in 2014 to provide the NCMA TG with a mission
statement to guide future initiatives, providing a framework for identifying and communicating
water resource planning goals and objectives, and formalizing a 10-year work plan for
implementation of those efforts. Several key objectives were identified that are related to
enhancing water supply reliability, improving water resource management, and increasing
effective public outreach. Implementation of some of these efforts continued throughout 2018 and
are described in detail in Section 7.1.
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2. Area Description
2.1 Setting
The SMGB as defined in the adjudication has three jurisdictional or management areas. As
shown in Figure 1, the NCMA represents the northernmost portion of the SMGB. Adjoining the
NCMA to the south and east is the NMMA, and the SMVMA encompasses the remainder of the
groundwater basin within the Santa Maria Valley.
The northern portion of the NCMA is dominantly 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. That area is 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 2018 is presented in Figure 3.
Historical rainfall data are compiled on a monthly basis for the following three stations:
Desert Research Institute (DRI): Western Regional Climate Center Pismo Station (Coop
ID: 046943) for 1950 through August of 2017 (after which data collection at this station
was discontinued)
DWR California Irrigation Management Information System (CIMIS) Nipomo Station (No.
202) for 2006 to present
San Luis Obispo County-operated rain gauge (No. SLO 795) in Oceano for 2000 to
present
The locations of the three stations are shown in Figure 4. 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 is
still considered reliable. For this reason and because the DRI station was discontinued in 2017,
the County gauge (No. SLO 795) was the sole source of precipitation data used in this 2018
Annual Report. Figure 3 is a composite graph combining data from the DRI and County stations
and illustrating annual rainfall totals from available data from 1950 through 2018 (on a calendar
year basis). Annual average rainfall for the NCMA is approximately 15.6 inches.
Monthly rainfall and evapotranspiration (ET) for 2018 as well as average monthly historical rainfall
and ET are presented in Figure 5. During 2018, below-average rainfall occurred in 11 months.
Above-average rainfall occurred only in the month of March. The total for the year was 11.2
inches, more than 4 inches less than the average annual rainfall for the area.
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Figure 3 illustrates annual rainfall and shows several multi-year drought cycles (e.g., 6 years,
1984-1990) followed by cycles of above-average rainfall (e.g., 7 years, 1991-1998). With the
exception of 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)
experienced for the previous 5 years. While the rainfall year of 2017 continued to bring hope that
the drought cycle had transitioned to a relatively wet period, as Figure 5 illustrates, rainfall year
2018 has returned to below average conditions.
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 4). The Nipomo station has gathered data since 2006. While this
station may have been subject to irrigation overspray in recent years (noted in the precipitation
section 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 5 for 2018 and average (10 years) conditions. ET rate affects recharge potential of rainfall
and the amount of outdoor water use (irrigation).
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3. Groundwater Conditions
3.1 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),
DWR (1979, 2002), and Fugro (2015).
The NCMA overlies the northwest portion of the SMGB. Groundwater pumped from the
sedimentary deposits comprising the main municipal production aquifer underlying the NCMA is
derived principally from the Paso Robles Formation. However, the underlying Careaga Sandstone
also is an important producing aquifer. Quaternary-age alluvial sediments fill the alluvial valleys
and form the alluvial aquifer primarily utilized by the agricultural interests in the Cienega Valley.
Several faults either cross or form the boundary of the NCMA, as identified by DWR (2002),
Pacific Gas & Electric (PG&E; PG&E, 2014), 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 aquifer materials. However, movement on the faults, as mapped by PG&E (2014),
may suggest a possible impediment to flow with the Careaga Formation 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 3.3.1) may suggest that the Santa Maria River Fault plays a potential, but
unknown, role in groundwater flow across the NCMA.
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.
3.2 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. In
addition, some return flows occur from imported surface supply sources including Lopez Lake and
the State Water Project (SWP). Discharge in the region is dominated by groundwater production
from pumping wells, but minor discharge certainly occurs through phreatophyte 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
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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 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 FCWCD Zone 3 management boundary
and with the northwestern boundary of the NMMA. Aquifer materials of similar formation,
provenance, and characteristics are present across the majority 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 adjudication, 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 intrusion if groundwater elevations onshore decline, such as
may be occurring in the central portion of NCMA along the Cienega Valley.
3.3 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
Monitoring Program for the Northern Cities Management Area (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 by the County at some time during the
past few decades. The County currently monitors 50 wells on a semiannual basis, in April and
October, within the NCMA. The County monitoring program includes four “sentry well” clusters
(piezometers) along the coast, a four-well cluster in Oceano, and the County Monitoring Well No.
3 (12N/35W-32C03) located on the eastern NCMA boundary between the NCMA and NMMA
(Figure 6). 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.
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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, in other words are screened across various production zones.
Moreover, many of the wells are active production wells or 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 basin (Figure 6). 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 6 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 #3 (12N/35W-32C03). Figure 7 shows the depth and well names of the
sentry well clusters, the OCSD observation well cluster, and County Monitoring Well #3.
Traditionally, the wells were divided into three basic depth categories including (1) shallow; (2)
intermediate; (3) 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. More recently, however, it is
becoming apparent that it is important to recognize and identify the geologic unit that each well
monitors. The water level responses and water quality changes are quite different between the
shallow alluvial unit (24B01, 30F01, and 30N01), the Paso Robles Formation (24B02, 30F02,
30N02, 30N03, 36L01, Oceano Green, Oceano Blue, and 32C03), and the deeper Careaga
Sandstone (24B03, 30F03, 36L02, Oceano Silver, and Oceano Yellow). The significance of this
level of differentiation and the impact of the value of the Deep Well Index will be studied more
extensively in the future.
Since the sentry well monitoring program began in 2009, 41 monitoring events have been
conducted. Monitoring events are now performed quarterly, in January, April, July, and October.
These monitoring events include collection of synoptic groundwater elevation data and water
quality samples for laboratory analysis.
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3.4 Groundwater Levels
Groundwater elevation data are gathered from the network of wells throughout the NCMA to
monitor effects of groundwater use, groundwater recharge, and to indicate risk 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.
3.4.1 Groundwater Level Contour Maps
Contoured groundwater elevations for the spring (April 2018) and fall (October 2018) monitoring
events, including data from the County monitoring program, are shown in Figures 8 and 9,
respectively.
Groundwater level contours for April 2018 are presented in Figure 8. Spring groundwater contours
north of the Santa Maria River Fault show a westerly to southwesterly groundwater flow. The
groundwater gradient and flow are generally inferred on the basis of historical records, historical
trends, and water level data from the NMMA farther east because of a limited number of wells and
water level data in the southernmost portion of the area that is dominated by sensitive-species
dunes and State Parks land.
Agricultural groundwater production resulted in a broad, but subdued, pumping trough in the
central portion of the NCMA, in Cienega Valley south of Arroyo Grande Creek. As shown on
Figure 8, the water elevations in the Cienega Valley are in the range of 6 to 13 feet NAVD88.
These data show a slight decrease in water elevations of 1.5 to 2.2 feet from April 2017 to April
2018. Prior to 2017, the subdued pumping trough in the Cienega Valley usually manifested itself
as a closed depression, with groundwater elevations generally below “sea level” (NAVD88) in the
center of the depression.
A second pumping depression has often formed north of Arroyo Grande Creek in the area of
concentrated municipal pumping. This second depression occurs partly in response to the recent
drought. However, that historical pumping depression has not formed now since 2017. April 2018
water levels in the main production zone along the coast ranged from 7.6 to 11 feet NAVD88.
Groundwater level contours for October 2018 are presented in Figure 9. The groundwater
conditions in October 2018 showed a decline of approximately 4 to 29 feet from April 2018.
Conditions exhibited a return to the previously prevalent pumping depression in the Cienega
Valley, with groundwater elevations as deep as (-)16 feet NAVD88. The groundwater elevation in
the pumping depression in October 2018 was approximately 3 feet lower than was present in
October 2017. October 2018 groundwater elevations in the main production zone along the coast
ranged from 5.4 to 7.7 feet NAVD88.
3.4.2 Historical Water Level Trends
Hydrographs of several water wells in the NCMA are presented in Figure 10.
The hydrographs for wells 32D03 and 32D11 (Figure 10) are paired hydrographs for wells in the
vicinity of the municipal wellfields. Depending on the duration of pumping of the municipal wells,
historically water levels in these wells have been below levels in other areas of the basin for
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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, when groundwater
pumping was at its peak in comparison to the past 30 years and contributed to the apparent
seawater intrusion event in the coastal wells in 2009, an area of lower groundwater elevations
("trough") beneath the active wellfield appeared.
As illustrated in Figure 10, the water elevations of all the wells, including the paired wells 32D03
and 32D11, exhibited a steady decline from 2011 to 2016 during which time rainfall was below
normal every year. In this time groundwater elevations declined to near sea level or, in the case of
33K03, to below sea level. By October 2016 the groundwater elevations in these wells were
generally below the levels observed in 2009-2010.
However, beginning in 2016 and throughout 2017 and 2018, all of the wells exhibited an overall
increase in water levels except for the normal, seasonal decline during the summer. The water
level in well 33K03, located near the NCMA/NMMA boundary, is now several feet above sea level
(NAVD88).
3.4.3 Sentry Wells
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.
Inspection of the recent data shown in Figure 11 compared to the historical record illustrates
some noteworthy trends:
From 2013 until near the end of 2016, the water level trend of 30N02, one of the wells that
experienced elevated TDS and chloride levels in 2009-2010 (i.e. “water quality
degradation”), 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 2018,
the water level reversed the downward trend and now has water elevations seasonally
fluctuating around 7 feet NAVD88.
The decline in water levels since 2005 to 2016 in the Oceano Dunes wells (36L01 and
36L02) was also notable and potentially significant, particularly in 36L01 which is screened
across the Paso Robles Formation. In 2016, both wells reached historic 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 aquifer. One
of the thresholds to track the status and apparent health of the basin 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 NAVD88 as a minimum threshold, below which the basin is at risk for eastward migration of
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seawater and a subsequent threat of encroaching seawater intrusion. Historical variation of this
index is represented by the average deep sentry well elevations in Figure 12.
Inspection of the Deep Well Index in 2008-09, prior to the period of water quality degradation in
30N02 and 30N03, the Deep Well Index dropped below the 7.5-foot threshold 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 2012, the Deep Well Index
dropped several times below the threshold, but usually for only a few months at a time.
2016 was notable because the Deep Well Index started the year above the trigger value, with an
index value of 9.18 in January 2016. By April, the index value dropped to 8.53 (1.03 feet above
the trigger value). The index value continued to decline and on June 8, 2016 dropped below the
7.5-foot threshold. For more than 6 months, the Deep Well Index remained below the index
trigger value and reached an index value of 5.39 feet in October. In late October, the Deep Well
Index began to rise and rose above the threshold value on November 28, 2016 (Figure 12). In
2017, the Deep Well Index remained above the 7.5-foot threshold value the entire year 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 with an index value of over
9 feet in January. It continued to rise, reached a high over 11 feet in mid-March, and then began
to decline. The index value 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 and reached an index value
of approximately 6.5 feet in late October. In early November, the Deep Well Index began to rise
and by late November, 2018, it rose above the threshold value where it remained through the end
of the year (Figure 12). The index value finished 2018 at about 9 feet NAVD88.
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 in early to mid-2015 resulted in variable conductivity data in some of the wells. All
transducers were replaced and are working properly. 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 2018 water levels for these key wells:
Deep Well Index Wells: The Deep Well Index wells exhibited a pattern throughout 2018
that is consistent with previous years. The water levels in wells 24B03, 30N02 and 30F03
generally declined starting in April or May 2018 and continued to decline into October
when they began to rise.
Also consistent with patterns seen in previous years is the variability of aquifer response
among the three wells. Well 24B03, the northernmost well 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.
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Coastal Wells: The water level in well 36L01, screened within the Paso Robles Formation,
remained 4 to 10 feet above sea level (NAVD88) throughout 2018 and remained stable
within the relatively narrow historical range. The water level in well 36L02, which is
screened within the Careaga Sandstone, illustrates a much greater seasonal fluctuation
than is observed in 36L01. Similar to 2017, the water elevation in 36L02 remained above
sea level throughout 2018, 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 and 2018, 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.
3.5 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 2017 and April 2018 were estimated on the basis
of a comparison of water level contour maps created for these periods. Comparison of the April
water levels was chosen to comply with DWR reporting requirements and SGMA.
The groundwater contour lines from each period were compared and the volumetric difference
between the two was calculated. The results are presented in Figure 19, which shows contours of
equal difference between water elevations of April 2017 and April 2018. Figure 19 shows that,
with the exception of two small areas along the coast, the NCMA portion of the basin experienced
a net decrease of groundwater in storage.
From the change of water levels, a volumetric change in groundwater storage was estimated,
based on aquifer properties (storage coefficient of 0.02) representative of the Paso Robles
Formation in the area as documented in the SMGB Characterization Project2 (Fugro, 2015). The
net decrease in groundwater levels represented a net decrease of groundwater in storage from
April 2017 to April 2018 of approximately 600 acre feet (AF).
3.6 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 potentially
can impact the quality of water in the basin, water quality is monitored at each of the sentry well
locations in the NCMA and County Well No. 3 (32C03).
2 The water levels used to estimate the change in groundwater storage are not differentiated by aquifer. In
addition, use of the fixed storage coefficient (representing the Paso Robles Formation) may result in a
generalized storage change estimate for portions of the NCMA area (i.e. the alluvium-dominated Cienega
Valley). To alleviate these issues it is recommended that future annual change in storage estimates utilize
the Phase 1B model that is being developed as part of the Central Coast Blue Project (see Section 7.1.2).
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3.6.1 Quarterly Groundwater Monitoring
Quarterly groundwater monitoring events occurred in January, April, July, and October 2018.
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 TDS
concentrations over time are presented in Figures 20 and 21, 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 TDS and chlorides, as well as
other constituents, remain relatively stable within a very narrow historical range. There have been
a few notable abnormal occurrences, however (see Figures 20 and 21). The NCMA 2009 Annual
Monitoring Report (Todd, 2010) suggested that the observed historical variation in water quality
data could be caused by several reasons such as variable permeability of geologic materials,
potential mixing with seawater, ion exchange in clay-rich units, and variability in surface recharge
sources such as Arroyo Grande and Meadow Creeks (Todd, 2010). Improved management of
municipal groundwater use, because of an overall reduction in pumping since 2009, has likely
contributed to the past few years of relatively stable groundwater quality.
3.6.2 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
2018. In general, no water quality results were observed that are a cause of concern.
Figure 22 is a Piper diagram, one of several means of graphically representing water quality. Of
interest is that there appears 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) and Oceano Dunes intermediate well (36L01, screened in the Paso Robles
Formation from 227 to 237 feet, are screened in the same production zone in the Paso
Robles Formation. This is despite their different nomenclature as “deep” vs. “intermediate”
wells. Relative to the other wells in the area these two wells are high in sulfates and have
calcium-magnesium-sulfate rich water. Interestingly, both wells are relatively low in
chloride. This is significant because this zone, and well 30N02, was the site of the
apparent seawater intrusion event in 2009-2010.
2. The County Monitoring Well #3 (32C03) 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 diagram
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, which is a Plio-Pleistocene age alluvial deposit. Although its
overall water quality signature is quite different than seawater, it is more closely
representative of seawater than any of the other wells in the area. Well 32C03 is screened
from 90 to 170 feet, in the Paso Robles Formation.
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3. All of the other wells in the monitoring network fall into the third category of groundwater.
These wells are all generally a calcium-bicarbonate groundwater that is commonly
associated with shallow groundwater. Of interest is that this grouping of water quality
represents groundwater from wells that are screened in both the Paso Robles Formation
and the Careaga sandstone (wells 24B03, 30F03, and 36L02 are screened in the Careaga
sandstone; the others are screened in the Paso Robles Formation).
None of the water quality results from monitoring wells throughout 2018 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 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 sandstone. 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.
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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
Lopez Lake and Water Treatment Plant (Lopez Lake, which also is referred to as Lopez
Reservoir) is operated by FCWCD Zone 3. FCWCD Zone 3 provides treated water directly to the
NCMA agencies and releases water to Arroyo Grande Creek for habitat conservation and
agricultural use. 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 yield,
4,530 AFY have been apportioned by agreements to contractors including each of the NCMA
agencies and County Service Area ("CSA") 12 in the Avila Beach area. Of the 8,730 AFY safe
yield, 4,200 AFY are reserved for downstream releases to maintain flows in Arroyo Grande Creek
and provide groundwater recharge. The 2018 FCWCD Zone 3 allocations are shown in Table 2.
Table 2. Lopez Lake (FCWCD Zone 3 Contractors) 2018 Water Allocation (AFY)
Contractor Normal Water Allocation,
(AFY)
Arroyo Grande 2,290
Grover Beach 800
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, FCWCD = Flood Control & Water
Conservation District, LRRP = Low Reservoir Response Plan, NCMA = Northern Cities Management Area
In December 2014, FCWCD Zone 3 adopted the Low Reservoir Response Plan (LRRP). The
LRRP establishes actions that FCWCD Zone 3 can take when the amount of water in storage in
the reservoir drops below 20,000 AF, provided that the FCWCD Board of Supervisors declares a
drought emergency. The purpose of the LRRP is to limit downstream releases and municipal
diversions from Lopez Reservoir to preserve water within the reservoir, above the minimum pool,
for a minimum of 3 to 4 years under drought conditions.
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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 used to meet the
LRRP objectives. The municipal diversions are to be reduced according to the strategies shown in
Table 3.
Table 3. Lopez Lake Municipal Diversion Reduction Strategy
Low Reservoir Response Plan
Amount of Water in Storage
(AF)
Municipal Diversion
Reduction
Municipal Diversion
(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: reductions in entitlement water
deliveries; reductions in downstream releases; no new allocations of Surplus Water from
unreleased downstream releases; and 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 FCWCD
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 Reduction Strategy
Low Reservoir Response Plan
Amount of Water in Storage
(AF)
Downstream Release
Reduction
Downstream Releases
(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
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The LRRP was put into effect on April 1, 2015. Throughout 2015 and all of 2016, Lopez operated
pursuant to the 15,000 AF diversion reduction trigger that required a 10% reduction in municipal
diversions. The 10,000 AF trigger requiring a 20% reduction was avoided because agencies
enacted mandatory water conservation measures and utilized other sources of water including
some minimal rainfall and SWP water.
Lopez Reservoir recovered from a low of 11,000 AF in storage to a peak of more than 30,000 AF
in May 2017, to 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 (Board of Supervisors declaration of water emergency and
reservoir levels drop below 20,000 AF), the Zone 3 agencies resolved to keep the LRRP in effect
until there is clear evidence that the drought is over. Because the reservoir volume was above
20,000 AF, no mandatory reductions in municipal deliveries were required in 2017.
In 2018, the reservoir was operated under the LRRP at above the 20,000 AF trigger (which does
not require a reduction in deliveries) until the LRRP was terminated on March 31st. Although the
reservoir level did drop below the 20,000 AF level in November, and remained below 20,000 AF
through December, the LRRP was not reactivated during 2018. The status of the reservoir and
management actions related to the LRRP will be monitored throughout 2019 and adjusted
accordingly based on winter 2019 rainfall and storage in Lopez Lake.
Total discharge from Lopez Lake in 2018 was 9,099 AF, of which 4,873 AF were delivered to
NCMA contractors, 77 AF were delivered to CSA 12, and 4,149 AF were released downstream to
maintain flow in Arroyo Grande Creek (Table 5).
In the past, when management of releases resulted in a portion of the 4,200 AFY remaining in the
reservoir, or the contractors did not use their full entitlement for the year, the water was offered to
the contractors as surplus water. Surplus water deliveries to the NCMA agencies in 2018 equaled
692 AF (Table 5).
Table 5. 2018 Lopez Lake Deliveries
Agency 2018 Allocation
Usage (AF)
2018 Surplus Usage
(AF)
2018 Total Lopez Lake
Water Delivery (AF)
Arroyo Grande 2,163 0 2,163
Grover Beach 804 0 804
Pismo Beach 911 515 1,426
Oceano CSD 303 177 480
Total NCMA 2017 Usage 4,181 692 4,873
CSA 12 (not in NCMA) 77 0 77
Downstream Releases 4,149 -- 4,149
Total 2017 Lopez Lake Deliveries 8,407 692 9,099
Notes:
AF= acre-feet, AFY = acre-feet per year, CSD = Community Services District, NCMA = Northern Cities Management Area
Source: FCWCD Zone 3 Monthly Operations Report
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4.1.2 State Water Project
Pismo Beach and OCSD have contracts with FCWCD to receive water from the SWP. The
FCWCD serves as the SWP contractor and provides imported water to local retailers through the
Coastal Branch pipeline. Pismo Beach and OCSD have contractual water delivery allocations,
commonly referred to as “Table A” water, of 1,100 AFY and 750 AFY, respectively (Table 6).
Additionally, Pismo Beach contracts for 1,240 AF of SWP 140 AF of which is owned by private
parties. In addition to their Table A allocation, Pismo Beach holds 1,240 AFY of additional
allocation with FCWCD and OCSD holds an additional allocation of 750 AFY. The additional
allocation held by the agencies, usually referred to as a “drought buffer”, is available to augment
their SWP water supply when the SWP annual allocation, i.e., percent of SWP water available, is
less than 100 percent. The additional allocations also increases each agencies 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. 2018 NCMA SWP Deliveries
Agency
Table A
Allocation,
AFY
Drought
Buffer, AFY
2018 Delivery,
AFY
Arroyo Grande -- -- --
Grover Beach -- -- --
Pismo Beach 1,100 1,240 242
Oceano CSD 750 750 --
Total Allocation/Usage, AFY 1,850 1,990 242
Notes:
Pismo Beach contracts for 1,240 AF of Table A SWP, but 140 AF are owned by private parties
Drought Buffer = Additional supplies when Table A allocation is less than 100%; total SWP deliveries (Table A and drought) cannot
exceed 1,240 AFY
AFY= acre-feet per year, CSD = Community Services District, NCMA = Northern Cities Management Area
The SWP annual allocation for contractors for 2018 was set at 15 percent of Table A contractual
allocation amounts on November 29, 2017. The 2018 SWP allocation of Table A contractual
allocations was increased three times in 2018; to 20 percent on January 29, 30 percent on April
24 and 35 percent on May 21st. Because SWP contractors have the opportunity to store or bank a
portion of their allocated water in any one year for delivery during the next year, the volume of
delivered SWP water may exceed that year’s Table A allocation. Normally, carryover water is
water that has been exported during the year from the Delta but has not been delivered. However,
storage for carryover water no longer becomes available if it interferes with storage of SWP water
for project needs.
For 2019, the initial allocation of the SWP contractors was set at 10 percent of Table A
contractual allocation amounts on November 30, 2018. The Table A contractual allocation was
increased to 15 percent on January 25, 2019, 35 percent on February 20, 2019, and to 70 percent
on March 20, 2019.
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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.
However, OCSD and Pismo Beach have not been negatively affected to date by reduced SWP
supplies because FCWCD allocations to its subcontractors have typically been fulfilled, even in
dry years. This is a result of FCWCD’s maintenance of excess, unused SWP entitlement.
Therefore, even when SWP supplies are decreased, the FCWCD’s excess SWP entitlement
provides a buffer so that contracted volumes to water purveyors, such as OCSD and Pismo
Beach, still may be provided in full. During 2018, Pismo Beach took delivery of 242 AF of SWP
water and OCSD did not take any SWP water delivery.
4.1.3 Groundwater
The Judgment and the 2002 Settlement Agreement governs the use of groundwater in the NCMA
and establishes that groundwater will continue to be allotted and independently managed by the
NCMA agencies, NCMA overlying owners, and FCWCD ("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 as shown on Figure 23. Groundwater also satisfies
agricultural irrigation and rural domestic use throughout the NCMA.
A 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. It provides allotments for agricultural
irrigation of 5,300 AFY, subsurface outflow to the ocean of 200 AFY, and urban use of 4,000 AFY.
The volume of the allotment 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 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 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 then were incorporated into a voluntary groundwater
management plan (1983 “Gentlemen’s Agreement”) and were further formalized in the 2002
Settlement Agreement and the 2005 Stipulation for the SMGB Adjudication.
According to Todd (2007), the “safe yield” allotment for agricultural irrigation is significantly higher
than the actual 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 are essential to preventing seawater
intrusion. A regional outflow of 3,000 AFY was estimated as a reasonable approximation although
the minimum subsurface outflow necessary to prevent seawater intrusion is unknown.
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The 2001 Groundwater Management Agreement provides that groundwater allotments of each of
the urban agencies can be increased when land within the corporate boundaries is converted
from agricultural use to urban use, 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 2018.
Total groundwater use 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). Total estimated groundwater pumpage in the NCMA in
2018 from the SMGB was 3,558 AF.
Table 7. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2018
Agency
Groundwater Allotment
+ Ag Conversion Credit
(AF)
2018 Groundwater Use
from SMGB (AF)
Percent Pumped of
Groundwater
Allotment
Arroyo Grande 1,202 + 121 = 1,323 49 4%
Grover Beach 1,198 + 209 = 1,407 416 30%
Pismo Beach 700 53 8%
Oceano CSD 900 246 27%
Total Urban Groundwater
Allotment / Use 4,000 + 330 = 4,330 764 18%
Agricultural Irrigation Applied
Water 5,300 - 330 = 4,970 2,651 53%
Nonpotable Irrigation by Arroyo
Grande -- 62 --
Rural Water Users -- 81 --
Estimated Subsurface Outflow to
Ocean (2001 Groundwater
Management Agreement)
200 -- --
Total NCMA Groundwater
Allotment / Use 9,500 3,558 37%
Notes:
AF= acre-feet, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District, NCMA = Northern Cities Management
Area
4.1.4 Developed Water
As defined in the Stipulation, “developed water” is “groundwater derived from human intervention”
and 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 in excess of the plant’s requirements. 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
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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, recharge credits would be based on a mutually accepted
methodology to evaluate the amount of recharge that would involve 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 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 allotments, 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 Allotment) Available Urban Water Supplies (AFY)
Urban
Area
Lopez
Lake
SWP
Allocation
(at 100%)
Groundwater
Allotment Ag Credit Other Supplies Total
Arroyo
Grande 2,290 0 1,202 121 160 3,773
Grover
Beach 800 0 1,198 209 0 2,207
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, CSD = Community Services District, SWP = State Water Project
Table 9 summarizes the available water supply to the NCMA agencies in 2018, including Lopez
Lake, Lopez Lake carryover (surplus) water, the 2018 SWP 35 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. 2018 Available Urban Water Supply, (AF)
Urban
Area
Lopez
Lake
Allocation
Lopez
Lake
Surplus
2018 SWP
Allocation
(at 35%
Delivery)
2018
SWP
Drought
Buffer
2018 SWP
Carryover
Ground-
water
Allotment
Ag
Credit
Other
Supplies
Total
(2018)
Arroyo
Grande 2,290 564 0 0 0 1,202 121 160 4,337
Grover
Beach 800 197 0 0 0 1,198 209 0 2,404
Pismo
Beach 892 220 385 01 1,2402 700 0 0 3,0521
Oceano
CSD 303 75 263 01 7502 900 0 0 2,0281
Total 4,285 1,056 648 0 1,990 4,000 330 160 11,821
Notes:
1In 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 or 750 AF for Pismo Beach and OCSD, respectively.
2Based on personal communication with Jill Ogren on January 15, 2019.
AF = acre-feet, CSD = Community Services District, SWP = State Water Project
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 this 2018 NCMA Annual Monitoring Report, the irrigation applied water 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, 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.
Data Used in the IDC:
Land-use. The San Luis Obispo County Agricultural Commissioner’s Office (ACO) annually
compiles an estimate of irrigated acres in the County. A view displaying the irrigated
agricultural lands within NCMA for 2018 is shown in Figure 24. The 2018 survey indicates a
total of 1,482 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. 2018 weather data from the FCWCD rain gauge in Oceano and the CIMIS
Nipomo Station (202) were used for precipitation and data related to reference ET values,
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respectively. The data needed to calculate reference ET include solar radiation, humidity, air
temperature, and wind speed. Both weather stations are shown in Figure 4.
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 (202, Nipomo) and includes crop
coefficients to calculate ET values for the irrigated crop categories.
Assumptions used in the analysis include:
o Since the NCMA is located near the coast, agricultural practices are influenced
significantly by the marine layer. As seen in Figure 4, 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.
o Use of an unadjusted calculated ET results in a higher value than that actually
taking place in the NCMA. Studies have identified that ET values within the marine
layer can be as much as 20 to 25 percent lower than that of the same crop located
just outside of the marine layer influence. Irrigation Training and Research Center
<http://www.itrc.org/etdata/etmain.htm> 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 percent reduction in ET to Zone
3 values range from 11% for rotational crops (small vegetables) to 19% for
strawberries. The distance the marine layer extends inland can vary from less than
½ 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.
o The NCMA is considered to be 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 also accounting for the cooling influence over some of the
area, monthly ET values calculated on the basis of the CIMIS Nipomo Station data
were adjusted lower by 12 percent and are shown in Table 10.
Soil Data. The Natural Resources Conservation Service (NRCS) Soil Survey Geographic
Database (SSURGO) 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, etc.) 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.
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Table 10. 2018 NCMA Crop Acreages and Calculated Evapotranspiration
Crop Type Acreage 2018 Potential ET1
(AF per acre)
Rotational Crops 1,292 1.92
Strawberry 155 0.9
Nursery Plants 11 1.8
Avocados 24 1.8
Notes:
1See “ET Values by Crop Category,” in text section above.
2Rotational crops ET is based on a two- to three-crop rotation.
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 prints out the results to the output files. The flow terms used in the root
zone routing are defined in the table below and shown in the graphic on the following page.
Drainage from ponded areas (Dr) was not applicable because there are no ponded crops in the
NCMA; and data related to generic soil moisture (G) were not available.
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 (rice,
refuges, etc.)
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)
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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 2018 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. 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.
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
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p
t
P-R p
ET
G
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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 2018 was estimated to be 2,651 AF, and the
effective precipitation (i.e., rainwater used by the crop) was 411 AF. Figure 25 illustrates the
estimated crop water requirement in the NCMA as calculated by the IDC, and displays the four
identified crop types and their estimated monthly applied water. The rotational crops have the
highest water supply requirement because they cover the greatest area (see Figure 24) and have
the greatest annual ET (Table 11).
The estimated agricultural water supply requirement of 2,651 AF in 2018 compares with the
estimated 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.
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Table 11. 2018 IDC Model Results of Monthly Applied Water
Monthly Applied Water (AF)
Annual Total
(AF)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rotational Crops
(AF) - - 1 130 335 280 522 363 358 261 226 - 2,477
Strawberry (AF) - - - - - 16 25 40 33 24 - - 138
Avocados (AF) - - - - - 2 6 6 5 4 3 - 25
Flowering and
Nursery (AF) 1 - - - - - 1 3 3 2 1 - 11
Total 1 - 1 130 335 296 548 411 399 26 6 - 2,651
Monthly Precipitation (inches) Annual Total
(inches) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation
(inches) 2.64 0.12 4.96 0.56 - - - - - 0.48 1.52 0.88 11.16
Monthly Unit Water Demand (AF/Acre) Annual Total
(AF/Acre) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rotational Crops
(AF/Acre) - - 0.001 0.10 0.26 0.22 0.40 0.28 0.28 0.20 0.18 - 1.92
Strawberry
(AF/Acre) - - - - - 0.10 0.16 0.26 0.21 0.15 - - 0.89
Avocados (AF/Acre) - - - - - 0.09 0.24 0.23 0.21 0.17 0.12 - 1.05
Flowering and
Nursery (AF/Acre) 0.08 - - - - - 0.11 0.28 0.27 0.20 0.11 - 1.05
Area Weighted
Average 0.001 - 0.001 0.09 0.23 0.20 0.37 0.28 0.27 0.20 0.16 - 1.79
Notes:
AF = acre-feet, AF/Acre = acre-feet per acre
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
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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, while 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, about 25 homes and businesses have been identified as served by private wells through
inspection of aerial photographs of rural areas within NCMA. 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 (Le Sage Riviera Campground) uses an onsite water well for turf
irrigation. The pumped water is not metered, and total water use is not known by the golf course
operators. 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 12.
Table 12. Estimated Rural Water Production
Groundwater User No. of
Units
Estimated Water
Production, AFY per
Unit
Estimated Annual
Water Production,
AFY
Notes
Halcyon Water System 35 0.40 14 1
Ken Mar Gardens 48 -- 6 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 Use 81
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.
AFY = acre-feet per year
UWMP = Urban Water Management Plan
ET = evapotranspiration
4.2.3 Urban Production for Potable Use
Urban water production for potable use is presented in Table 13 for each of the NCMA agencies
from 2005 through 2018. These values reflect Lopez Lake deliveries, SWP deliveries, and
groundwater production data, and represent all water used within the service areas of the four
NCMA agencies (including the portions of Arroyo Grande and Pismo Beach that extend outside
the NCMA), and system losses. In general, 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,
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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
because of conservation activities implemented by the NCMA agencies in response to the historic
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 in 2018
is up slightly from 2017 at 5,878 AF.
Table 13. Urban Water Production for Potable Use (Groundwater and Surface Water, AF)
Year Arroyo Grande Grover Beach Pismo Beach OCSD Total Urban
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
2016 1,948 1,210 1,646 672 5,476
2017 2,194 1,248 1,700 718 5,860
2018 2,212 1,221 1,720 725 5,878
Notes:
AF = acre-feet, CSD = Community Services District
4.2.4 2018 Groundwater Pumpage
Total SMGB groundwater use in the NCMA, including urban production, applied agricultural water
requirements, and rural pumping, is shown in Table 14, a replication of Table 7. Total estimated
SMGB groundwater pumpage in the NCMA in 2018 was 3,558 AF which represents an increase
from 2017 of 3,456 A. However, with the exception of 2016 and 2017, this represents the lowest
volume of groundwater production from the NCMA portion of the basin in at least the past 20
years.
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Table 14. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2018 (AF)
Agency
Groundwater Allotment
+ Ag Conversion Credit
(AF)
2018 Groundwater Use
from SMGB (AF)
Percent Pumped of
Groundwater Allotment
Arroyo Grande 1,202 + 121 = 1,323 49 4%
Grover Beach 1,198 + 209 = 1,407 416 30%
Pismo Beach 700 53 8%
Oceano CSD 900 246 27%
Total Urban Groundwater
Allotment / Use 4,000 + 330 = 4,330 764 18%
Agricultural Irrigation Applied
Water 5,300 - 330 = 4,970 2,651 53%
Nonpotable Irrigation by Arroyo
Grande -- 62 --
Rural Water Users -- 81 --
Estimated Subsurface Outflow to
Ocean (2001 Groundwater
Management Agreement)
200 -- --
Total NCMA Groundwater
Allotment / Use 9,500 3,558 37%
Notes:
AF = acre-feet, CSD = Community Services District, NCMA = Northern Cities Management Area
The estimated groundwater pumpage of 3,558 in 2018 represents about 37 percent of the
calculated yield of 9,500 AFY for the NCMA portion of the Santa Maria Basin.
A graphical depiction of water use by supply source for each NCMA agency since 2000 is
presented as Figure 26. 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 and 2018 on Lopez Reservoir is
illustrated in this graphic. Although all four agencies pumped groundwater as part of their supply
portfolio in 2018, groundwater pumped from the SMGB constituted a minor part of the overall
water supply, an amount of 825 AF 3 or 14 percent of overall urban use.
As shown in Figure 27, 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 historical annual pumpage rates. From
2013 through present, annual pumpage totals have been on a downward trend. In 2018, urban
potable groundwater use declined to 764 AF; which is 18 percent of the 4,330 AF of combined
urban groundwater allotment and agricultural conversion credit.
3 This total includes the non-potable irrigation production by Arroyo Grande
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4.2.5 Changes in Water Production
Historical water use for urban uses, agricultural irrigation, and rural uses is shown in Table 15.
Table 15. 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
Notes:
1Irrigation applied water includes agricultural irrigation plus SMGB non-potable irrigation by Arroyo Grande.
AF = acre-feet, CSD = Community Services District
In general, urban water production has ranged from 8,982 AF (2007; Table 15) to 5,476 AF in
2016. Water use since 2007 shows an overall decline each year with a slight increase in 2012
and 2013; 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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5. Comparison of Water Supply v. 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; refer to Table 8. In 2018, because of the availability of Lopez Lake surplus water
and SWP carryover water, the total available urban water supply was 11,821 AF (Table 9).
As described in the 2001 Groundwater Management Agreement and affirmed in the 2002
Settlement Agreement, the calculated historical “safe yield” from the NCMA portion of the
groundwater basin is 9,500 AFY. Because all of the 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 2018, the total estimated NCMA water production was 8,672 AF (Table 16). The 2018 water
production, by source, of each city and agency is shown in Table 16. Note that the production
volumes described here are gross production, if pumped groundwater, and gross deliveries, if
surface water deliveries, and equals net consumptive demand plus losses and return water.
Table 16. 2018 Water Production by Source (AF)
Urban Area Lopez Lake
State
Water
Project
SMGB
Groundwater
Other
Supplies1 Total
Arroyo Grande 2,163 0 49 0 2,212
Grover Beach 804 0 416 0 1,221
Pismo Beach 1,426 242 53 0 1,720
Oceano CSD 480 0 246 0 725
Urban Water Use Total 4,873 242 764 0 5,878
Agricultural Irrigation
Applied Water 0 0 2,651 0 2,651
Rural Water Users 0 0 81 0 81
Non-potable Irrigation by
Arroyo Grande 0 0 62 0 62
Total 4,873 242 3,558 0 8,672
Notes:
1 “Other Supplies” includes groundwater pumped from outside the NCMA boundaries (which was zero in 2018)
AF = acre-feet, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District
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As shown in Table 16, urban water use in 2018 to the NCMA was supplied from 4,873 AF of
Lopez Lake water, 242 AF of SWP water, and 764 AF of groundwater. Arroyo Grande did not
pump from their Pismo Formation wells in 2018.
Based on the calculated yield of the NCMA portion of the basin, 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 2018, factoring in the
SWP delivery schedule and availability of SWP carryover water and Lopez Lake surplus, the total
available supply for all uses was 11,821 AF (Table 9), compared to actual 2018 NCMA water use
of 8,672 AF (Table 15). It must be noted, however, that this comparative review of available 2018
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 18 percent of their “available” groundwater allotment. Such minimal utilization of the
groundwater resource resulted in a minor loss of groundwater in storage in the basin and a slight
lowering of water level elevations. It is clear that the NCMA agencies could not have used their
entire groundwater allotment in 2018 without significantly lowering water elevations below current
conditions and potentially seriously exacerbating the threat of seawater intrusion.
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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 Sacramento-
San Joaquin 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 as a whole,
including the entire SMGB, is not adequately monitored and managed. In particular, the
management of the basin may need to account for sea level rise and the relative change in
groundwater gradient along the shore line.
6.1 Threats to Local Groundwater Supply
6.1.1 Declining Water Levels
Water levels continue to exhibit an overall declining trend in the NCMA. Important factors to
maintaining water levels are managing inflow and outflow.
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 is an important
component of groundwater recharge. This inflow is reduced from historical levels, as
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).
This condition continues to worsen, as described in all subsequent NMMA Annual Reports
(NMMA, 2011, 2012, 2013, 2014, 2015, 2016, and 2017).
Outflow: A major outflow component is groundwater pumpage. Total SMGB groundwater
pumping in the NCMA (urban, agriculture, and rural domestic) was 3,558 AF in 2018,
which is 37 percent of the court-accepted 9,500 AFY safe yield of the NCMA portion of the
basin. Such minimal utilization of the groundwater resource resulted in a minor loss of
groundwater in storage in the basin and a slight lowering of water level elevations. It is
clear that the NCMA agencies could not have used their entire groundwater allotment in
2018 without significantly lowering water elevations below current conditions and
potentially seriously exacerbating the threat of seawater intrusion.
The current slight decrease of groundwater in storage, despite groundwater pumping at only 32
percent of the safe yield, 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
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of declining water levels in the NCMA, even though total pumping is currently 32 percent of the
basin 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 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 NCMA groundwater basin
exhibited water surface elevations below sea level (NCMA 2008 Annual Monitoring Report (Todd,
2009)). Hydrographs for NCMA sentry wells (Figures 11 and 12) show coastal groundwater
elevations at relatively low levels for as long as 2 years. 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 28 and 29). MW-Blue well
also showed elevated concentrations of TDS and chlorides, but a concurrent decline in sodium.
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 index wells, the other deep index wells showed no
elevated concentrations during the same time period. However, comparing well 30N02 to wells
with similar screen elevations (Figure 7), wells 36L01 (approximately 11,950 feet south of well
30N02) and the MW-Blue well, approximately 3,300 feet east-southeast of well 30N02, suggested
that seawater intrusion perhaps progressed eastward as far as the MW-Blue well, but not as far
south as well 36L01 (Figure 29). While the TDS and chloride concentrations were elevated from
August 2009 to July 2011 in the MW-Blue well, the sodium concentrations remained within
historical levels. During the same time period, TDS, chloride, and sodium concentrations
remained within historical levels in well 36L01. The well cluster at 32S/13E 30N may be relatively
prone to seawater intrusion because of the location near the more permeable sediments
deposited by the ancestral Arroyo Creek (NCMA 2009 Annual Monitoring Report) and the lower
groundwater elevations typical to the east (Figures 8 and 9).
During 2018, there were no indications of seawater intrusion.
6.1.3 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, FCWCD, and the State of California also 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
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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
reduced groundwater use between 25 and 95 percent during the past several years. In 2018,
municipal groundwater use was 764 AF, which constitutes 18 percent of the urban user’s
groundwater allotment (including agricultural conversion credits) of the basin safe yield (Table 7).
Central Coast Blue is a regional recycled water project that includes advanced treatment of water
from Pismo Beach’s and South San Luis Obispo County’s (SSLOCSD) wastewater treatment
plants and injection into the SMGB to reduce the risk 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 2018 include feasibility study analysis, preliminary design, pilot
plant development and operation, funding appropriation, cost/benefit sharing analysis, and
groundwater modeling.
Reduced groundwater recharge, whether it is from drought or reduction of subsurface inflow from
the north and east, reduces subsurface outflow to the ocean and increases the potential threat of
seawater intrusion.
6.2 Threats to State Water Project Supply
Both extended drought and long-term reduction in snowpack from climate change can affect SWP
deliveries. Despite above average precipitation in 2016 and early 2017, below average
precipitation in the Central Coast area through the latter months of 2017 resulted in an only
modest reprieve from drought conditions. Storage capacity levels of the state’s two largest
reservoirs, Lake Shasta and Lake Oroville were 70 and 35 percent capacity, respectively, as of
the start of 2018, both down from the previous year.
Leading into 2019, rainfall during the last 8 months of 2018 resulted in 2.88 inches of rain. The
initial allocation announcement by DWR, announced on November 30, 2018, informed SWP
contractors that their 2019 allocation would be 10 percent of requests for deliveries. The Table A
allocation was subsequently increased on January 25, 2019 to 15 percent. 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—was in 2006.
The immediate threat of allocation reductions to Pismo Beach and OCSD, the only SWP
contractors in the NCMA, has not significantly materialized during the past several years. The
FCWCD’s excess SWP entitlement provides a buffer, in addition to the agency’s drought buffer,
so that contracted volumes to water purveyors, such as the OCSD and Pismo Beach, still may be
provided in full. However, the SWP supply has the potential to be affected by drought as well as
environmental issues, particularly involving the Delta smelt in the Sacramento-San Joaquin Delta.
6.3 Threats to Lopez Lake Water Supply
Extended drought conditions in recent years have contributed to record low water levels in Lopez
Lake and 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
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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 in order to preserve water
within the reservoir for an extended drought. The relatively heavy rainfall of late 2016 and early
2017 created hope that the drought of 2012 to 2016 had ended. A relatively wet March 2018
increased the 2017-18 rainfall totals to the area to approximately 60 percent of normal. Although
this was followed by below average precipitation throughout the remainder of 2018, precipitation
amounts during the first three months of 2019 have been well above average, resulting in a return
to non-drought conditions. 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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7. Management Activities
The NCMA and overlying private well users have actively managed surface water and groundwater
resources in the NCMA agencies area for more than 30 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, Stipulation, and Judgment After Trial.
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 Management Objectives
Eight basic Water Management Objectives have been established for ongoing NCMA
groundwater management:
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
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.
A major management undertaking of the NCMA TG was the development in 2014 of a Strategic
Plan (WSC, 2014) to provide the NCMA with:
1. A mission statement to guide ongoing and future initiatives as well as capture the
requirements outlined in the Gentlemen’s Agreement, the Settlement Agreement, and the
Stipulation. The mission statement said:
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
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2. A framework for communicating water resource goals
3. A formalized Work Plan for the next 10 years
Through the strategic planning process, the NCMA TG identified several key strategic objectives
to guide its efforts. These efforts include:
A. Enhance Water Supply Reliability
Prepare the NCMA agencies for prolonged drought conditions.
Develop a coordinated response plan for seawater intrusion and other supply
emergencies.
Analyze impacts of pumping on the groundwater basin.
Better protect against threats to groundwater sustainability.
B. Improve Water Resource Management
Update the 2001 Groundwater Management Agreement.
Develop more formalized structure/governance for the NCMA TG.
C. Increase Effective Outreach
Engage agriculture stakeholders.
Improve coordination with FCWCD and other regional efforts.
Increase communication with various City Councils and Boards of Directors.
The Strategic Plan formalized many of the water resource management projects, programs, and
planning efforts that the NCMA agencies, both individually and jointly, have been engaged in that
address water supply and demand issues, particularly with respect to efforts to ensure a long-
term sustainable supply. The following section discusses the major management activities that
the NCMA agencies have pursued during 2018 that incorporate the planning objectives outlined in
the 2014 Strategic 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 underlying groundwater basin.
The purpose of the FY 2014/15 Water Supply, Production and Delivery Plan 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 for FY 2014/15.
The WSPDP made recommendations that were implemented or subject to further study. These
recommendations are summarized in subsequent sections, and include:
Continue ongoing water conservation efforts to limit demand and make additional
supply available for potentially future dry years.
Immediately implement the strategies identified in Scenario 1 Baseline Delivery
to minimize SMGB groundwater pumping in the near term.
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These recommendations reinforce the ongoing management efforts by the NCMA and provide
potential projects to improve water supply reliability and protect water quality during the ongoing
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 in the basin.
The NCMA agencies, in conjunction with the other Zone 3 agencies and the FCWCD, continue
efforts to evaluate and implement potential drought emergency options. This initiative includes
identification, evaluation, and ranking of potential options available to Zone 3 to improve the
reliability of its water supplies. This evaluation of options was completed by the Zone 3 Technical
Advisory Committee and presented to the Zone 3 Advisory Committee and the County Board of
Supervisors (BOS). As a result of these efforts, the Zone 3 agencies and the County have
pledged to work collaboratively together to continue to evaluate and implement emergency water
supply reliability options as required in conditions of extended drought. Potential options that the
Zone 3 agencies have evaluated in the past few years include:
Zone 3 Extended Drought Emergency Options:
Cloud Seeding. Investigate opportunities to use cloud seeding to enhance rainfall in the
Lopez Watershed. This could involve a cooperative agreement with the County.
State Water Project. Maximize importation of FCWCD SWP supplies, including
subcontractor and “Excess Entitlement” supplies.
o Evaluate delivery of SWP water to non-SWP subcontractors under emergency
provisions (e.g., Arroyo Grande, Grover Beach, etc.).
Unsubscribed Nacimiento Water Project (NWP) Water. Investigate transfer/exchange
opportunities to obtain unsubscribed 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, etc.).
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 and
make that water available for municipal use.
Enhanced Conservation. Evaluate opportunities for enhanced water conservation by the
Zone 3 agencies beyond the Governor’s Mandatory Water Conservation Order (e.g., water
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rationing, no outdoor watering, agriculture water restrictions, etc.) 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 agencies to purchase NWP water and use exchange
agreements and existing infrastructure to deliver additional water to Zone 3 through the
Coastal Branch pipeline.
7.1.1 Share Groundwater Resources and Manage Pumping
Strategies:
Continued reduction of groundwater pumping, maintain below safe yield.
Coordinated delivery of Lopez Lake water to the maximum amount available, pursuant to
the Lopez Lake LRRP.
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
Discussion:
A longstanding objective of water users in the NCMA has been to cooperatively share and
manage groundwater resources. In 1983, the Northern Parties (including water users in the
NCMA area) mutually agreed on an initial safe yield estimate and an allotment of pumping
between the urban users and agricultural irrigation users of 57 percent and 43 percent,
respectively. In this agreement, the NCMA agencies also established pumping allotments among
themselves. 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 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 allotment among the urban users and established a consistent methodology to
address agricultural land use conversion.
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 City to purchase SWP water
from the FCWCD’s excess allotment on a temporary basis and only during a declared local water
emergency; that condition was not reached in 2017 and Arroyo Grande did not purchase SWP
water.
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The WSPDP now provides a framework for the NCMA, as a whole, to actively and effectively
manage the groundwater resource, particularly in years of below normal rainfall and below
“normal” SWP delivery schedules. The WSPDP outlined a strategy to provide sufficient supplies
to NCMA water users in instances of reduced SWP delivery. Specifically, in 2018, municipal
groundwater pumpage at 764 AF (825 AF including non-potable water pumped by Arroyo
Grande) was less than any other year during the 20-year period from 1999 through 2018
(inclusive).
Many aspects of the NCMA’s water management strategy that shifted direction in 2014 as a result
of the severity of the 2012-16 drought continued into 2018. Adoption of the LRRP by FCWCD
resulted in the implementation of the first stage of LRRP reduction triggers, which protect the
Lopez Lake from running dry in any single year while providing flows for habitat protection in
Arroyo Grande Creek. Although the drought emergency was lifted in 2017, the Zone 3 agencies
continued operating under the LRRP through March 31st 2018. In addition, the NCMA agencies
have increased conservation efforts even more than in previous years to adequately and safely
manage the water resource (see additional discussion in Section 7.1.7).
Seawater intrusion is the most important potential adverse impact for the NCMA agencies to
consider in their efforts to effectively manage the basin. Seawater intrusion, a concern since the
1960s, would degrade the quality of water in the aquifer and potentially render portions of the
basin unsuitable for groundwater production (DWR, 1970). A Deep Well Index of the three
primary deep sentry wells of 7.5 feet (NAVD88) has been recognized as the index, 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 sentry well index above the 7.5-foot level. However, for
several weeks in April and May 2013, from early July through mid-December 2013, and from mid-
April 2014 through mid-December 2014, the index value dropped below the target. In 2015, the
index value was above the Deep Well Index threshold from January through February; however,
the index remained below the target level from March through December 2015, generally between
4 and 7 feet below the 7.5-foot target.
Similarly, in 2016, the Deep Well Index started the year above the threshold value, with an index
value of 9.18 in January. By mid-May the index value dropped below the 7.5-foot index level.
Between mid-May and October 2016, the Deep Well Index remained below the index threshold
value, reaching an index value of 5.39 feet in October. In late October, the Deep Well Index
began to rise and on November 28, 2016, it rose above the threshold value (Figure 12). In 2017,
the Deep Well Index remained above the 7.5-foot threshold value the entire year (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, with an index value of over
9 feet in January. It continued to rise, reaching a high over 11 feet in mid-March and then began
to decline. The index value 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 early November, the Deep Well Index began to rise and
by late November, 2018, it rose above the threshold value where it remained through the end of
the year (Figure 12). The index value finished 2018 at about 9 feet NAVD88.
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Another potential adverse impact of localized pumping includes reduction of flow in local streams,
notably Arroyo Grande Creek (Todd, 2007). The NCMA agencies (as Zone 3 contractors) have
participated with FCWCD in preparation of the Arroyo Grande Creek Habitat Conservation Plan
(HCP) that addresses reservoir releases to maintain both groundwater levels and habitat diversity
in the creek. The FCWCD contracted with ECORP Consulting in 2015 to conduct the additional
hydraulic studies to finalize the HCP. The work continued throughout 2018; the scheduled
completion of the HCP is not certain.
7.1.2 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 Agreement Regarding Management of the Arroyo Grande Groundwater
Basin, approved in 2002.
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
datasets 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 significant progress was made in 2017 and 2018 toward development of a numerical
groundwater flow model, associated with a recycled water project referred to as Central Coast
Blue (formerly referred to 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 Advanced Treatment Facility (ATF) to produce Advanced Purified Water (APW) to
augment its water supply through injection to recharge the groundwater basin 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 SMGB to increase the recharge to the basin, 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 (SEP), work was initiated in 2017 and continued in 2018 for development
of the Phase 1B groundwater flow model. The model 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 model is to evaluate additional groundwater injection and extraction scenarios to further
support Central Coast Blue. It will be utilized to identify the locations of the proposed injection
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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. This modeling work is expected to be
completed in mid-2019.
As part of the FCWCD’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. As a result,
continuous water level and field-parameter water quality data were collected from these wells
throughout 2018.
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.
7.1.3 Monitor Supply and Demand and Share Information
Strategies:
Develop coordinated Urban Water Management Plans (UWMPs) for the NCMA agencies.
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 to UWMP projections:
o Arroyo Grande 2015 UWMP (revised and updated, January 2017)
o Pismo Beach 2015 UWMP (June 2016)
o Grover Beach 2010 UWMP
o OCSD is not required to prepare an UWMP because the community population
does not meet the minimum requirement threshold.
Discussion:
Pismo Beach and Arroyo Grande prepared updated UWMPs in 2016 and 2017, respectively.
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 participation in the NCMA planning process.
Regular monitoring of activities that affect the groundwater basin, and sharing 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 Stipulation and
the 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 each have evaluated their future water
demands as part of their respective 2010 UWMPs and 2015 UWMP updates. The NCMA shares
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information with the two other management areas (NMMA and SMVMA) through data exchange
and regular meetings throughout the Annual Report preparation cycle.
Management activities have become more closely coordinated among the NCMA agencies as a
result of the 2012-16 drought. In particular, the NCMA agencies implemented the LRRP to limit
municipal diversions and downstream releases from Lopez Reservoir to ensure that water is
available for future potentially dry years. In addition, the Zone 3 agencies (which include the
NCMA TG) initiated a long-term drought planning effort. The planning effort is intended to prepare
water supplies for periods of extended drought conditions.
7.1.4 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:
o 24B03
o 30F03
o 30N02
o 36L01
o 36L02
o 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
jurisdiction; the FCWCD 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.
The San Luis Obispo County Stormwater Resources Plan (SLO Co, 2019) was submitted to the
State Water Resources Control Board for review on February 28, 2019. The purpose of this
Stormwater Resources 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-
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related capital projects and other programmatic actions (SLO Co., 2019). The Stormwater
Management Plan identifies four proposed projects within the NCMA, including the Pismo
Preserve Roads Improvement Project, the Oceano Drainage Improvement Project, South Halcyon
Green/Complete Street and a stormwater infiltration basins 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 also specifically recognizes the proximity of production wells to
the coast and the threat of seawater intrusion. The NCMA agencies and FCWCD 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 their condition. In July
2010 the wellheads (surface completions) at four sentry monitoring well clusters in the NCMA
were renovated:
24B01, -B02, and-B03
30F01, -F02, and -F03
30N01, -N02, and -N03
36L01 and -L02
The renovations included raising the elevations of the top of each individual well casing by 2 to 3
feet and resurveying relative to the NAVD88 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 five of the key sentry monitoring wells to provide continuous groundwater levels at
key locations. By combining this 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, better manage the basin.
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 well 32C03 (County Well No. 3), 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:
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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
NAVD88 for an extended period of time. Given that the index 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 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 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 water level 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, in preparation in 2017-2018 in
support of Central Coast Blue, may be used for the purpose in 2019 and beyond.
The 2005 Stipulation requires Nipomo Community Services District (NCSD) and the other
NMMA parties to develop a Nipomo Supplemental Water Project (NSWP) to import a
minimum of 2,500 AFY to mitigate overpumping that may impact groundwater inflow to the
NCMA, and thus may facilitate seawater intrusion in both NCMA and NMMA. On July 2,
2015, the NCSD began taking deliveries of SWP from the City of Santa Maria. The NSWP
is designed to deliver 3,000 AFY, however current deliveries are about 800 AFY. The
additional stages of the NSWP and funding sources to implement the project to allow
increased water delivery to meet the requirements of the Judgment are being planned; full
implementation of the project is apparently planned for 2025-26.
7.1.5 Protect Groundwater Quality
Strategies:
Perform quarterly water quality monitoring at all sentry wells and County Well No. 3.
Gather temperature and electrical conductivity data from monitoring wells to continuously
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 a recycled water system in Pismo Beach, pursuant to the results of Pismo
Beach’s Recycled Water Facilities Planning Study (RWFPS), completed in 2015 (WSC,
2015) and Central Coast Blue.
Support regional recycled water project planning through performance of a RWFPS by the
South San Luis Obispo County Sanitation District. The RWFPS was completed in 2017.
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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 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 five monitoring wells to provide
continuous water quality tracking for early indication of seawater intrusion. A sixth sentry well
cluster (36L) in the Oceano Dunes was instrumented in April 2015 as part of the SMGB
characterization study (Fugro, 2015). The results of the SMGB characterization study provide the
foundation for preparation of an SNMP.
Investigations continued throughout 2018 for work associated with Pismo Beach’s 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. Engineering was performed throughout 2018, and the
environmental review process continued along with continued development of the groundwater
flow model.
7.1.6 Manage Cooperatively
Strategies:
Improve agriculture outreach 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 FCWCD,
and other local and state agencies. Specifically, the NCMA agencies have limited their pumping
and, in cooperation with FCWCD, invested in surface water supplies so as 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 2018 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 Water Resources Advisory Council (the
County-wide advisory panel on water issues).
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 of
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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 Judgment, the NCMA has taken the lead in cooperative management of its
management area. The NCMA TG met monthly throughout 2018 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 2018). The purpose of the SMGBMA technical
subcommittee is to coordinate efforts among the management areas, such as enhanced
monitoring of groundwater levels and improved sharing of data. With the current threats to water
supply in all management areas, greater communication, analytical collaboration, and data
sharing, especially between NCMA and NMMA, are encouraged.
An outcome of actions initiated by NCMA in early 2016 resulted in several activities of increased
discussion and collaboration between the NCMA and NMMA throughout 2017. The NCMA-NMMA
Management Coordination Committee met several times in 2017 and 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
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 2018.
A third initiative was to create a Modeling Subcommittee, composed of a select set of
representatives from the NCMA and NMMA, to discuss the feasibility and possible work scope for
the development of a numerical groundwater flow model of the SMGB, or at least that portion of
the basin 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 and monitor progress.
7.1.7 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. Water conservation
activities in the NCMA are summarized in various documents produced by the NCMA agencies,
including the 2015 Urban Water Management Plans (UWMP) of Arroyo Grande and Pismo Beach
and the 2010 UWMP of Grover Beach. OCSD is not required to prepare an UWMP.
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In addition to ongoing water conservation efforts, the drought conditions that extended throughout
2016 led the NCMA agencies to increase their effort 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), which enacted mandatory water conservation requirements because
of the ongoing 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 took
action to lift the drought emergency and State 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 State
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 temporary water use limitations that established
individualized water budgets for all residential customers. During the State-mandated Stage 1
restrictions, Arroyo Grande water use reduction was on average 42% compared to 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.
Mandatory water conservation measures include:
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.
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 are prohibited except to
prevent structural damage and/or to provide for the public health and safety.
Item 11.a. - Page 71
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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 their 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.
In addition to the mandatory water conservation measures outlined above, the Water Shortage
Emergency resolution included a tiered billing system, whereby residential customers were
assigned a baseline amount of water, based on the amount of water used during the billing period
of 2013. Residential customers in Tier 1 then were required to reduce consumption by 10 percent,
customers in Tier 2 were required to reduce consumption by 20 percent, and customers in Tier 3
were required to reduce consumption by 30 percent.
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:
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 you improve your
landscape and protect your 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 includes:
Waterless urinal retrofits. All existing urinals in the City will be retrofitted to waterless
urinals before February 14, 2016. Exemptions to this section may be granted at the
discretion of the City Engineer under certain conditions.
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Faucet aerators. Residential restroom construction will be fitted with aerators that emit no
more than 0.5 gpm. Exemptions may be granted at the discretion of the City Engineer in
cases to protect public health and safety. 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.
Sub-meters in new construction. All new multi-unit buildings, regardless of proposed
use, will be 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:
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 drip or micro-spray irrigation and be on an automatic timer.
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 rain water,
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 you improve your
landscape and protect your 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.
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 Central Coast Blue.
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:
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Use of water which 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.
o Outdoor irrigation is prohibited between 10 a.m. and 4 p.m.
o 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.
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
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. The Stage III Water
Shortage declaration, with associated prohibitions, continued throughout 2018. 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.
Grover Beach has implemented demand management rebate programs including:
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Cash for Grass Rebate Program
Smart Irrigation Controller and Sensor Rebate Program
Toilet Fixtures, Showerheads, and Aerators Retrofit Rebate Program
Washing Machine Rebate Program
Oceano CSD
Given the population of its service area, OCSD is not required to prepare an UWMP or reduce
water consumption as mandated by the Governor for Urban Water Suppliers. 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 tiered rates remain in effect, but were
reduced in July 2017, upon adoption of the Post Drought Consumption Charges and
Supplemental Water Charge Ordinance.
OCSD pumped only 27 percent of its groundwater allotment in 2018 and is maintaining its annual
allocation of Lopez Lake water in storage as allowed pursuant to the LRRP. Meanwhile, OCSD’s
conservation efforts continue to exceed the Governor’s drought-mandated goal (since rescinded)
of 25 percent. Overall consumption has declined to approximately 85 gallons per capita daily
(gpcd) after the implementation of drought conservation rates, illustrating that as a disadvantaged
community, it is responding effectively to conservation rates.
OCSD’s demand is less than its annual allocation of SWP water, preserving local supplies if
needed in subsequent years, depending on SWP deliveries. In the event that SWP deliveries are
decreased to a level that is insufficient to meet OCSD demand, then mandatory conservation
efforts will be implemented to match the available supply. If the supply is less than 55 gpcd
needed to meet health and safety needs, then the supply shortfall will be supplemented from
Lopez Lake supplies. Current SWP reliability analyses prepared by the DWR illustrate a low
probability that SWP water will not be able to meet OCSD demands in any two consecutive years.
Additional 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.
7.1.8 Evaluate Alternative Sources of Supply
Strategies:
Evaluate expanded use of recycled water, including development and implementation of
Central Coast Blue.
Analyze capacity of the Lopez Lake and Coastal Branch pipelines to maximize deliveries
of surface water. The following analyses have been completed:
o Lopez Lake Pipeline Capacity Evaluation
o Lopez Lake Pipeline Capacity Re-Evaluation
o Coastal Branch Capacity Assessment
Item 11.a. - Page 75
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o Lopez Bypass and State Water Delivery Evaluation
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 sustainable management of the groundwater resource and help to reduce the
risk of water shortages. These alternative sources include:
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 FCWCD’s excess allotment 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 7.1.5, 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 7.1.5 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 basin,
improve water supply reliability, and help to 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 FCWCD Service Area 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 by 6 feet (Stetson, 2013). The NCMA agencies are
continuing to evaluate other aspects of the project, including pipeline capacity and impacts
on the HCP process.
Item 11.a. - Page 76
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Desalination. In 2006, Arroyo Grande, Grover Beach, and OCSD used Prop 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.
Previous efforts by the FCWCD 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 have
been terminated since PG&E announced plans to close the power plant.
Nacimiento Pipeline Extension. In 2006, Arroyo Grande, Grover Beach, and OCSD
completed a Nacimiento pipeline extension evaluation 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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8. References
Allen, R.G., Pereira, L.S., Raes, D., and Smith, M. 1998. Crop evapotranspiration- Guidelines for
computing crop water requirements: Food and Agriculture Organization of the United
Nations, Irrigation and Drainage Paper 56, 300p.
California Department of Water Resources (DWR). 1958. San Luis Obispo County Investigation,
Bulletin No. 18, vol 1 and 2.
California Department of Water Resources (DWR). 1970. Sea-Water Intrusion: Pismo-Guadalupe
Area. Bulletin No. 63-3, 76 p.
California Department of Water Resources (DWR). 1975. Sea-Water Intrusion in California,
Inventory of Coastal Ground Water Basins, Bulletin 63-5.
California Department of Water Resources (DWR). 1979. Ground Water in the Arroyo Grande
Area, Southern District Report.
California Department of Water Resources. 2002. Water resources of the Arroyo Grande –
Nipomo Mesa area: Southern District Report, 156 p.
California Department of Water Resources Bay Delta Office. 2016. IWFM Demand Calculator
IDC 2015: Theoretical Documentation and User’s Manual. Central Valley Modeling Unit.
California Polytechnic State University. 2012. 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. 2010. City of Arroyo Grande 2010 Urban Water Management Plan.
City of Grover Beach. 2010. City of Grover Beach 2010 Urban Water Management Plan.
EDAW, Inc. August 1998. San Luis Obispo County Master Water Plan Update.
Fugro Consultants, Inc. 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.
Miller, G. A. and Evenson, R. E. 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.
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.
Pacific Gas and Electric Company (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
San Luis Obispo County (SLO Co). 2019. San Luis Obispo County Stormwater Resources Plan.
Submitted to the State Water Resources Control Board on February 28, 2019.
Stetson Engineers. 2013. Lopez Lake Spillway Raise Project Report.
Superior Court of California, County of Santa Clara, in Judgment After Trial, entered January 25,
2008 incorporating 2002 Settlement Agreement among the Northern Cities, Northern
Landowners, and Other Parties, and 2005 Settlement Stipulation for the Santa Maria
Groundwater Basin adjudication.
Item 11.a. - Page 80
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Todd Engineers. 2007. Water Balance Study for the Northern Cities Area. Todd Engineers. April
2007.
Todd. Engineers. 2008. Monitoring Program for the Northern Cities Management Area. Todd
Engineers, July 2008.
Todd Engineers. 2010. Summary of Renovations for the Northern Cities Management Area
Sentry Wells, San Luis Obispo County, California.
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.
Water Systems Consulting, Inc. (WSC). 2014. Final Draft Strategic Plan for the Northern Cities
Management Area Technical Group, June 2014.
Water Systems Consulting, Inc. (WSC). 2015. Recycled Water Facilities Planning Study – Final:
prepared for the City of Pismo Beach, April 2015.
Woodring, W.P and Bramlette, M.N. 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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FIGURES
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Item 11.a. - Page 84
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LEGENDWells Used in Groundwater ContouringGroundwater Contour (feet, NAVD88)Northern Cities Management AreaStreamsFaults
Groundwater Elevation Contours Spring 2018
FIGURE 8
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Annual_Report\Figure_8_NCMA_Water_Level_Contours_April_2018.mxd
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LEGENDWells Used in Groundwater ContouringGroundwater Contour (feet, NAVD88)Minor Groundwater ContourNorthern Cities Management AreaStreamsFaults
Groundwater Elevation Contours Fall 2018
FIGURE 9
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Annual_Report\Figure_9_NCMA_Water_Level_Contours_Oct_2018.mxd
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San Luis Obispo County, CaliforniaFIGURE 101990 1995 2000 2005 2010 2015 2020
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30K03
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Item 11.a. - Page 94
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SENTRY WELL HYDROGRAPHS
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 111965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
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Pier Avenue
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Well -30N02
Well -30N03
Well -36L01
Well -36L02
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Flowing Artesian
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Item 11.a. - Page 95
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HYDROGRAPH OF DEEP WELL INDEX LEVEL
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 121965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
-5-4-3-2-101234567891011121314151617181920Deep Well Index Elevation, feet NAVD88Deep Well Index Level
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WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 24B03
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 132010 2011 2012 2013 2014 2015 2016 2017 2018
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Item 11.a. - Page 97
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WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30F03
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 142010 2011 2012 2013 2014 2015 2016 2017 2018
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San Luis Obispo County, CaliforniaFIGURE 15-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD882010 2011 2012 2013 2014 2015 2016 2017 2018
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San Luis Obispo County, CaliforniaFIGURE 162010 2011 2012 2013 2014 2015 2016 2017 2018
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WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L02
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San Luis Obispo County, CaliforniaFIGURE 172010 2011 2012 2013 2014 2015 2016 2017 2018
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San Luis Obispo County, CaliforniaFIGURE 182010 2011 2012 2013 2014 2015 2016 2017 2018
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LEGEND
Contours of Equal Difference in Water Level, feet
Area of Net Rise
Area of Net Decline
Northern Cities Management Area
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Change in Groundwater Elevation, April 2017 to April 2018
FIGURE 19
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Annual_Report\Figure_19_Water Level Change_April_2017 to 2018_final.mxd
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Item 11.a. - Page 103
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Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 212010 2011 2012 2013 2014 2015 2016 2017 2018
0
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Well -32C03Total Dissolved Solids Concentration, mg/lNorth Beach Campground
Highway 1
Pier Avenue
Oceano Dunes and 32C03
Item 11.a. - Page 105
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PIPER DIAGRAM OF WATER QUALITY IN SELECT MONITORING WELLS
Northern Cities Management Area
San Luis Obispo County, California FIGURE 22
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Item 11.a. - Page 106
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!R City of Arroyo Grande Well
!R City of Grover Beach Well
!R City of Pismo Beach Well
!R Oceano Community Services District Well
Northern Cities Management AreaFaultsStreams
Locations of MunicipalProduction Wells
FIGURE 23
Northern Cities Management AreaSan Luis Obispo County, California
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Item 11.a. - Page 107
Date: January 28, 2019 Data Sources:
LEGENDNorthern Cities Management AreaLandscape MainAvocadoGarden Transplant Plants
Outdoor Transplant PlantsRotational CropsStrawberryUncultivated Land
NCMA Agricultural Land 2018
FIGURE 24
Northern Cities Management AreaSan Luis Obispo County, California
Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Annual_Report\Figure_24_NCMA Agricultural Land_2017.mxd
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Item 11.a. - Page 108
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Item 11.a. - Page 109
2018 Crop Total Applied Water and Precipitation
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~Precipitation (in) 2 .64 0.12 4 .96 0 .56 0 .00 0 .00 0 .00 0 .00 0 .00 0.48 1.52 0 .88
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MUNICIPAL WATER USE BY SOURCE
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 26P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 25 NCMA Municipal Water Use by Source
Item 11.a. - Page 110
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TOTAL WATER USE (URBAN, RURAL, AG) BY SOURCE
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 27P:\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
Item 11.a. - Page 111
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Calendar Year
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HISTORICAL TDS, CHLORIDE AND SODIUM, INDEX WELLS AND 30N03
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 281965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
0
500
1,000
1,500
2,000
2,500
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40
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120
160
200
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300
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Well -30F03 (Careaga) Index Wells
Well -30N02 (Paso Robles)
Well -30N03 (Paso Robles)
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Water Solutions, Inc.
HISTORICAL TDS, CHLORIDE AND SODIUM, WELLS 30N02, MW-BLUE AND 36L01
Northern Cities Management Area
San Luis Obispo County, CaliforniaFIGURE 291965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020
0
500
1,000
1,500
2,000
2,500
TDS, mg/l0
40
80
120
160
200
Chloride, mg/l0
100
200
300
Sodium, mg/lWell -30N02 (Paso Robles)
Well -31H11 (Blue; Paso Robles Formation)
Well -36L01 (Paso Robles Formation)
P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 28 NCMA TDS, Cl and Sodium Wells 30N02 MW-Blue and 36L01
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APPENDIX A
NCMA Monitoring Well Water Level and
Water Quality Data
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Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B01 North Beach Shallow Alluvium10/9/2018 6.29 Stove Pipe Top of Steel 13.58 7.2932S/12E-24B01 North Beach Shallow Alluvium7/10/2018 7.00 Stove Pipe Top of Steel 13.58 6.5832S/12E-24B01 North Beach Shallow Alluvium4/10/2018 6.48 Stove Pipe Top of Steel 13.58 7.1032S/12E-24B01 North Beach Shallow Alluvium1/10/2018 6.00 Stove Pipe Top of Steel 13.58 7.5832S/12E-24B01 North Beach Shallow Alluvium10/10/2017 6.12 Stove Pipe Top of Steel 13.58 7.4632S/12E-24B01 North Beach Shallow Alluvium7/11/2017 6.74 Stove Pipe Top of Steel 13.58 6.8432S/12E-24B01 North Beach Shallow Alluvium4/11/2017 6.30 Stove Pipe Top of Steel 13.58 7.2832S/12E-24B01 North Beach Shallow Alluvium1/10/2017 5.54 Stove Pipe Top of Steel 13.58 8.0432S/12E-24B01 North Beach Shallow Alluvium10/12/2016 6.54 Stove Pipe Top of Steel 13.58 7.0432S/12E-24B01 North Beach Shallow Alluvium7/19/2016 6.78 Stove Pipe Top of Steel 13.58 6.8032S/12E-24B01 North Beach Shallow Alluvium4/12/2016 6.35 Stove Pipe Top of Steel 13.58 7.2332S/12E-24B01 North Beach Shallow Alluvium1/12/2016 5.17 Stove Pipe Top of Steel 13.58 8.4132S/12E-24B01 North Beach Shallow Alluvium10/13/2015 5.73 Stove Pipe Top of Steel 13.58 7.8532S/12E-24B01 North Beach Shallow Alluvium7/14/2015 6.06 Stove Pipe Top of Steel 13.58 7.5232S/12E-24B01 North Beach Shallow Alluvium4/14/2015 6.22 Stove Pipe Top of Steel 13.58 7.3632S/12E-24B01 North Beach Shallow Alluvium1/13/2015 5.83 Stove Pipe Top of Steel 13.58 7.7532S/12E-24B01 North Beach Shallow Alluvium10/14/2014 5.76 Stove Pipe Top of Steel 13.58 7.8232S/12E-24B01 North Beach Shallow Alluvium7/29/2014 5.99 Stove Pipe Top of Steel 13.58 7.5932S/12E-24B01 North Beach Shallow Alluvium6/4/2014 6.52 Stove Pipe Top of Steel 13.58 7.0632S/12E-24B01 North Beach Shallow Alluvium4/15/2014 5.95 Stove Pipe Top of Steel 13.58 7.6332S/12E-24B01 North Beach Shallow Alluvium1/14/2014 5.75 Stove Pipe Top of Steel 13.58 7.8332S/12E-24B01 North Beach Shallow Alluvium10/14/2013 6.07 Stove Pipe Top of Steel 13.58 7.5132S/12E-24B01 North Beach Shallow Alluvium7/9/2013 6.09 Stove Pipe Top of Steel 13.58 7.4932S/12E-24B01 North Beach Shallow Alluvium4/10/2013 7.00 Stove Pipe Top of Steel 13.58 6.5832S/12E-24B01 North Beach Shallow Alluvium1/14/2013 5.72 Stove Pipe Top of Steel 13.58 7.8632S/12E-24B01 North Beach Shallow Alluvium10/29/2012 5.92 Stove Pipe Top of Steel 13.58 7.6632S/12E-24B01 North Beach Shallow Alluvium7/23/2012 5.79 Stove Pipe Top of Steel 13.58 7.7932S/12E-24B01 North Beach Shallow Alluvium4/18/2012 5.58 Stove Pipe Top of Steel 13.58 8.0032S/12E-24B01 North Beach Shallow Alluvium1/11/2012 5.72 Stove Pipe Top of Steel 13.58 7.8632S/12E-24B01 North Beach Shallow Alluvium11/21/2011 5.80 Stove Pipe Top of Steel 13.58 7.7832S/12E-24B01 North Beach Shallow Alluvium7/26/2011 6.38 Stove Pipe Top of Steel 13.58 7.2032S/12E-24B01 North Beach Shallow Alluvium4/20/2011 6.40 Stove Pipe Top of Steel 13.58 7.1832S/12E-24B01 North Beach Shallow Alluvium1/24/2011 5.78 Stove Pipe Top of Steel 13.58 7.8032S/12E-24B01 North Beach Shallow Alluvium10/21/2010 6.37 Stove Pipe Top of Steel 13.58 7.2132S/12E-24B01 North Beach Shallow Alluvium7/27/2010 6.48 Stove Pipe Top of Steel 13.58 7.132S/12E-24B01 North Beach Shallow Alluvium4/27/2010 3.84 Flush Top Flush Mount 10.70 6.8632S/12E-24B01 North Beach Shallow Alluvium1/27/2010 3.13 Flush Top Flush Mount 10.70 7.5732S/12E-24B01 North Beach Shallow Alluvium10/19/2009 2.28 Flush Top Flush Mount 10.70 8.4232S/12E-24B01 North Beach Shallow Alluvium8/20/2009 3.25 Flush Top Flush Mount 10.70 7.4532S/12E-24B01 North Beach Shallow Alluvium5/12/2009 3.58 Flush Top Flush Mount 10.70 7.1232S/12E-24B01 North Beach Shallow Alluvium4/7/2009 1.61 Flush Top Flush Mount 11.70 10.09P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 117~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B02 North Beach MiddlePaso Robles10/9/2018 6.65 Stove Pipe Top of Steel 13.586.9332S/12E-24B02 North Beach MiddlePaso Robles7/10/2018 7.17 Stove Pipe Top of Steel 13.586.4132S/12E-24B02 North Beach MiddlePaso Robles4/10/2018 6.02 Stove Pipe Top of Steel 13.587.5632S/12E-24B02 North Beach MiddlePaso Robles1/10/2018 5.57 Stove Pipe Top of Steel 13.588.0132S/12E-24B02 North Beach MiddlePaso Robles10/10/2017 6.46 Stove Pipe Top of Steel 13.587.1232S/12E-24B02 North Beach MiddlePaso Robles7/11/2017 6.93 Stove Pipe Top of Steel 13.586.6532S/12E-24B02 North Beach MiddlePaso Robles4/11/2017 6.26 Stove Pipe Top of Steel 13.587.3232S/12E-24B02 North Beach MiddlePaso Robles1/10/2017 5.33 Stove Pipe Top of Steel 13.588.2532S/12E-24B02 North Beach MiddlePaso Robles10/12/2016 7.05 Stove Pipe Top of Steel 13.586.5332S/12E-24B02 North Beach MiddlePaso Robles7/19/2016 7.61 Stove Pipe Top of Steel 13.585.9732S/12E-24B02 North Beach MiddlePaso Robles4/12/2016 6.37 Stove Pipe Top of Steel 13.587.2132S/12E-24B02 North Beach MiddlePaso Robles1/12/2016 5.51 Stove Pipe Top of Steel 13.588.0732S/12E-24B02 North Beach MiddlePaso Robles10/13/2015 6.61 Stove Pipe Top of Steel 13.586.9732S/12E-24B02 North Beach MiddlePaso Robles7/14/2015 6.97 Stove Pipe Top of Steel 13.586.6132S/12E-24B02 North Beach MiddlePaso Robles4/14/2015 7.13 Stove Pipe Top of Steel 13.586.4532S/12E-24B02 North Beach MiddlePaso Robles1/13/2015 6.28 Stove Pipe Top of Steel 13.587.3032S/12E-24B02 North Beach MiddlePaso Robles10/14/2014 6.61 Stove Pipe Top of Steel 13.586.9732S/12E-24B02 North Beach MiddlePaso Robles7/29/2014 7.05 Stove Pipe Top of Steel 13.586.5332S/12E-24B02 North Beach MiddlePaso Robles6/4/2014 8.25 Stove Pipe Top of Steel 13.585.3332S/12E-24B02 North Beach MiddlePaso Robles4/15/2014 6.55 Stove Pipe Top of Steel 13.587.0332S/12E-24B02 North Beach MiddlePaso Robles1/14/2014 6.34 Stove Pipe Top of Steel 13.587.2432S/12E-24B02 North Beach MiddlePaso Robles10/14/2013 7.08 Stove Pipe Top of Steel 13.586.5032S/12E-24B02 North Beach MiddlePaso Robles7/9/2013 7.17 Stove Pipe Top of Steel 13.586.4132S/12E-24B02 North Beach MiddlePaso Robles4/10/2013 6.33 Stove Pipe Top of Steel 13.587.2532S/12E-24B02 North Beach MiddlePaso Robles1/14/2013 5.61 Stove Pipe Top of Steel 13.587.9732S/12E-24B02 North Beach MiddlePaso Robles10/29/2012 5.88 Stove Pipe Top of Steel 13.587.732S/12E-24B02 North Beach MiddlePaso Robles7/23/2012 6.12 Stove Pipe Top of Steel 13.587.4632S/12E-24B02 North Beach MiddlePaso Robles4/18/2012 5.48 Stove Pipe Top of Steel 13.588.132S/12E-24B02 North Beach MiddlePaso Robles1/11/2012 5.47 Stove Pipe Top of Steel 13.588.1132S/12E-24B02 North Beach MiddlePaso Robles11/21/2011 5.69 Stove Pipe Top of Steel 13.587.8932S/12E-24B02 North Beach MiddlePaso Robles7/26/2011 6.51 Stove Pipe Top of Steel 13.587.0732S/12E-24B02 North Beach MiddlePaso Robles4/20/2011 6.30 Stove Pipe Top of Steel 13.587.2832S/12E-24B02 North Beach MiddlePaso Robles1/24/2011 5.69 Stove Pipe Top of Steel 13.587.8932S/12E-24B02 North Beach MiddlePaso Robles10/21/2010 6.79 Stove Pipe Top of Steel 13.586.7932S/12E-24B02 North Beach MiddlePaso Robles7/27/2010 7.05 Stove Pipe Top of Steel 13.586.5332S/12E-24B02 North Beach MiddlePaso Robles4/27/2010 4.34Flush Top Flush Mount 10.706.3632S/12E-24B02 North Beach MiddlePaso Robles1/27/2010 3.38Flush Top Flush Mount 10.707.3232S/12E-24B02 North Beach MiddlePaso Robles10/19/2009 2.26Flush Top Flush Mount 10.708.4432S/12E-24B02 North Beach MiddlePaso Robles8/20/2009 4.09Flush Top Flush Mount 10.706.6132S/12E-24B02 North Beach MiddlePaso Robles5/12/2009 4.74Flush Top Flush Mount 10.705.96P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 118~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B03 North Beach DeepCareaga10/9/2018 3.80 Stove Pipe Top of Steel 13.589.7832S/12E-24B03 North Beach DeepCareaga7/10/2018 4.18 Stove Pipe Top of Steel 13.589.4032S/12E-24B03 North Beach DeepCareaga4/10/2018 2.55 Stove Pipe Top of Steel 13.5811.0332S/12E-24B03 North Beach DeepCareaga1/10/2018 2.51 Stove Pipe Top of Steel 13.5811.0732S/12E-24B03 North Beach DeepCareaga10/10/2017 3.60 Stove Pipe Top of Steel 13.589.9832S/12E-24B03 North Beach DeepCareaga7/11/2017 3.75 Stove Pipe Top of Steel 13.589.8332S/12E-24B03 North Beach DeepCareaga4/11/2017 2.90 Stove Pipe Top of Steel 13.5810.6832S/12E-24B03 North Beach DeepCareaga1/10/2017 2.59 Stove Pipe Top of Steel 13.5810.9932S/12E-24B03 North Beach DeepCareaga10/12/2016 4.70 Stove Pipe Top of Steel 13.588.8832S/12E-24B03 North Beach DeepCareaga7/19/2016 5.10 Stove Pipe Top of Steel 13.588.4832S/12E-24B03 North Beach DeepCareaga4/12/2016 3.81 Stove Pipe Top of Steel 13.589.7732S/12E-24B03 North Beach DeepCareaga1/12/2016 3.01 Stove Pipe Top of Steel 13.5810.5732S/12E-24B03 North Beach DeepCareaga10/13/2015 4.62 Stove Pipe Top of Steel 13.588.9632S/12E-24B03 North Beach DeepCareaga7/14/2015 4.76 Stove Pipe Top of Steel 13.588.8232S/12E-24B03 North Beach DeepCareaga4/14/2015 4.86 Stove Pipe Top of Steel 13.588.7232S/12E-24B03 North Beach DeepCareaga1/13/2015 3.59 Stove Pipe Top of Steel 13.589.9932S/12E-24B03 North Beach DeepCareaga10/14/2014 4.60 Stove Pipe Top of Steel 13.588.9832S/12E-24B03 North Beach DeepCareaga7/29/2014 4.78 Stove Pipe Top of Steel 13.588.8032S/12E-24B03 North Beach DeepCareaga6/4/2014 7.33 Stove Pipe Top of Steel 13.586.2532S/12E-24B03 North Beach DeepCareaga5/5/2014 5.36 Stove Pipe Top of Steel 13.588.2232S/12E-24B03 North Beach DeepCareaga4/15/2014 3.94 Stove Pipe Top of Steel 13.589.6432S/12E-24B03 North Beach DeepCareaga1/14/2014 3.81 Stove Pipe Top of Steel 13.589.7732S/12E-24B03 North Beach DeepCareaga10/14/2013 4.50 Stove Pipe Top of Steel 13.589.0832S/12E-24B03 North Beach DeepCareaga7/9/2013 4.48 Stove Pipe Top of Steel 13.589.132S/12E-24B03 North Beach DeepCareaga4/10/2013 3.41 Stove Pipe Top of Steel 13.5810.1732S/12E-24B03 North Beach DeepCareaga1/14/2013 2.48 Stove Pipe Top of Steel 13.5811.132S/12E-24B03 North Beach DeepCareaga10/29/2012 3.01 Stove Pipe Top of Steel 13.5810.5732S/12E-24B03 North Beach DeepCareaga7/23/2012 2.98 Stove Pipe Top of Steel 13.5810.632S/12E-24B03 North Beach DeepCareaga4/18/2012 1.93 Stove Pipe Top of Steel 13.5811.6532S/12E-24B03 North Beach DeepCareaga1/12/2012 2.15 Stove Pipe Top of Steel 13.5811.4332S/12E-24B03 North Beach DeepCareaga11/21/2011 2.93 Stove Pipe Top of Steel 13.5810.6532S/12E-24B03 North Beach DeepCareaga7/26/2011 3.17 Stove Pipe Top of Steel 13.5810.4132S/12E-24B03 North Beach DeepCareaga4/20/2011 3.25 Stove Pipe Top of Steel 13.5810.3332S/12E-24B03 North Beach DeepCareaga1/24/2011 2.65 Stove Pipe Top of Steel 13.5810.9332S/12E-24B03 North Beach DeepCareaga10/21/2010 4.60 Stove Pipe Top of Steel 13.588.9832S/12E-24B03 North Beach DeepCareaga7/27/2010 4.54 Stove Pipe Top of Steel 13.589.0432S/12E-24B03 North Beach DeepCareaga4/27/2010 1.43Flush Top Flush Mount 10.709.2732S/12E-24B03 North Beach DeepCareaga1/27/2010 0.94Flush Top Flush Mount 10.709.7632S/12E-24B03 North Beach DeepCareaga10/19/2009 0.81Flush Top Flush Mount 10.709.8932S/12E-24B03 North Beach DeepCareaga8/19/2009 4.18Flush Top Flush Mount 10.706.5232S/12E-24B03 North Beach DeepCareaga5/12/2009 3.18Flush Top Flush Mount 10.707.52P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 119~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/9/2018 15.23 Stove Pipe Top of Steel 23.16 7.9332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/10/2018 14.81 Stove Pipe Top of Steel 23.168.3532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/10/2018 14.03 Stove Pipe Top of Steel 23.169.1332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2018 14.40 Stove Pipe Top of Steel 23.168.7632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/10/2017 14.65 Stove Pipe Top of Steel 23.168.5132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/11/2017 13.73 Stove Pipe Top of Steel 23.169.4332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/11/2017 13.25 Stove Pipe Top of Steel 23.169.9132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2017 13.99 Stove Pipe Top of Steel 23.169.1732S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/12/2016 17.08 Stove Pipe Top of Steel 23.166.0832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/19/2016 16.42 Stove Pipe Top of Steel 23.166.7432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/12/2016 14.83 Stove Pipe Top of Steel 23.168.3332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/12/2016 15.00 Stove Pipe Top of Steel 23.168.1632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/13/2015 17.11 Stove Pipe Top of Steel 23.166.0532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/14/2015 16.93 Stove Pipe Top of Steel 23.166.2332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/14/2015 16.01 Stove Pipe Top of Steel 23.167.1532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/13/2015 15.41 Stove Pipe Top of Steel 23.167.7532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/14/2014 17.05 Stove Pipe Top of Steel 23.166.1132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/29/2014 17.11 Stove Pipe Top of Steel 23.166.0532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles6/4/2014 16.82 Stove Pipe Top of Steel 23.166.3432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/15/2014 15.56 Stove Pipe Top of Steel 23.167.6032S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/14/2014 16.58 Stove Pipe Top of Steel 23.166.5832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/14/2013 17.07 Stove Pipe Top of Steel 23.166.0932S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/9/2013 16.17 Stove Pipe Top of Steel 23.166.9932S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/10/2013 14.58 Stove Pipe Top of Steel 23.168.5832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/14/2013 14.36 Stove Pipe Top of Steel 23.168.832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/30/2012 14.95 Stove Pipe Top of Steel 23.168.2132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/24/2012 14.00 Stove Pipe Top of Steel 23.169.1632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/18/2012 13.42 Stove Pipe Top of Steel 23.169.7432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2012 13.80 Stove Pipe Top of Steel 23.169.3632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles11/21/2011 13.78 Stove Pipe Top of Steel 23.169.3832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/26/2011 13.50 Stove Pipe Top of Steel 23.169.6632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/20/2011 12.82 Stove Pipe Top of Steel 23.1610.3432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/24/2011 13.33 Stove Pipe Top of Steel 23.169.8332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/21/2010 16.55 Stove Pipe Top of Steel 23.166.6132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/26/2010 15.68 Stove Pipe Top of Steel 23.167.4832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/27/2010 11.02 Stove Pipe Top of Steel 23.1612.1432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/28/2010 12.73 Stove Pipe Top of Steel 23.1610.4332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/19/2009 14.33 Stove Pipe Top of Steel 23.168.8332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles8/19/2009 14.34 Stove Pipe Top of Steel 23.168.8232S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles5/12/2009 12.38 Stove Pipe Top of Steel 23.1610.7832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/7/2009 11.67 Stove Pipe Top of Steel 24.1612.49P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 120~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F02Highway 1 MiddlePaso Robles10/9/2018 15.94 Stove Pipe Top of Steel 23.167.2232S/13E-30F02Highway 1 MiddlePaso Robles7/10/2018 15.90 Stove Pipe Top of Steel 23.167.2632S/13E-30F02Highway 1 MiddlePaso Robles4/10/2018 14.62 Stove Pipe Top of Steel 23.168.5432S/13E-30F02Highway 1 MiddlePaso Robles1/10/2018 14.79 Stove Pipe Top of Steel 23.168.3732S/13E-30F02Highway 1 MiddlePaso Robles10/10/2017 15.45 Stove Pipe Top of Steel 23.167.7132S/13E-30F02Highway 1 MiddlePaso Robles7/11/2017 15.30 Stove Pipe Top of Steel 23.167.8632S/13E-30F02Highway 1 MiddlePaso Robles4/11/2017 14.27 Stove Pipe Top of Steel 23.168.8932S/13E-30F02Highway 1 MiddlePaso Robles1/10/2017 14.53 Stove Pipe Top of Steel 23.168.6332S/13E-30F02Highway 1 MiddlePaso Robles10/12/2016 17.35 Stove Pipe Top of Steel 23.165.8132S/13E-30F02Highway 1 MiddlePaso Robles7/19/2016 17.63 Stove Pipe Top of Steel 23.165.5332S/13E-30F02Highway 1 MiddlePaso Robles4/12/2016 15.98 Stove Pipe Top of Steel 23.167.1832S/13E-30F02Highway 1 MiddlePaso Robles1/12/2016 15.29 Stove Pipe Top of Steel 23.167.8732S/13E-30F02Highway 1 MiddlePaso Robles10/13/2015 17.29 Stove Pipe Top of Steel 23.165.8732S/13E-30F02Highway 1 MiddlePaso Robles7/14/2015 17.44 Stove Pipe Top of Steel 23.165.7232S/13E-30F02Highway 1 MiddlePaso Robles4/14/2015 16.94 Stove Pipe Top of Steel 23.166.2232S/13E-30F02Highway 1 MiddlePaso Robles1/13/2015 16.41 Stove Pipe Top of Steel 23.166.7532S/13E-30F02Highway 1 MiddlePaso Robles10/14/2014 17.33 Stove Pipe Top of Steel 23.165.8332S/13E-30F02Highway 1 MiddlePaso Robles7/29/2014 17.31 Stove Pipe Top of Steel 23.165.8532S/13E-30F02Highway 1 MiddlePaso Robles6/4/2014 18.00 Stove Pipe Top of Steel 23.165.1632S/13E-30F02Highway 1 MiddlePaso Robles4/15/2014 16.27 Stove Pipe Top of Steel 23.166.8932S/13E-30F02Highway 1 MiddlePaso Robles1/14/2014 17.01 Stove Pipe Top of Steel 23.166.1532S/13E-30F02Highway 1 MiddlePaso Robles10/14/2013 17.52 Stove Pipe Top of Steel 23.165.6432S/13E-30F02Highway 1 MiddlePaso Robles7/9/2013 17.15 Stove Pipe Top of Steel 23.166.0132S/13E-30F02Highway 1 MiddlePaso Robles4/10/2013 15.76 Stove Pipe Top of Steel 23.167.432S/13E-30F02Highway 1 MiddlePaso Robles1/14/2013 15.01 Stove Pipe Top of Steel 23.168.1532S/13E-30F02Highway 1 MiddlePaso Robles10/30/2012 15.27 Stove Pipe Top of Steel 23.167.8932S/13E-30F02Highway 1 MiddlePaso Robles7/24/2012 14.82 Stove Pipe Top of Steel 23.168.3432S/13E-30F02Highway 1 MiddlePaso Robles4/18/2012 14.38 Stove Pipe Top of Steel 23.168.7832S/13E-30F02Highway 1 MiddlePaso Robles1/12/2012 14.31 Stove Pipe Top of Steel 23.168.8532S/13E-30F02Highway 1 MiddlePaso Robles11/21/2011 14.94 Stove Pipe Top of Steel 23.168.2232S/13E-30F02Highway 1 MiddlePaso Robles7/26/2011 14.46 Stove Pipe Top of Steel 23.168.732S/13E-30F02Highway 1 MiddlePaso Robles4/20/2011 14.23 Stove Pipe Top of Steel 23.168.9332S/13E-30F02Highway 1 MiddlePaso Robles1/24/2011 14.36 Stove Pipe Top of Steel 23.168.8032S/13E-30F02Highway 1 MiddlePaso Robles10/21/2010 7.39 Stove Pipe Top of Steel 23.1615.7732S/13E-30F02Highway 1 MiddlePaso Robles7/26/2010 16.21 Stove Pipe Top of Steel 23.166.9532S/13E-30F02Highway 1 MiddlePaso Robles4/27/2010 12.14Flush Top Flush Mount 20.368.2232S/13E-30F02Highway 1 MiddlePaso Robles1/28/2010 13.09Flush Top Flush Mount 20.367.2732S/13E-30F02Highway 1 MiddlePaso Robles10/19/2009 14.36Flush Top Flush Mount 20.366.0032S/13E-30F02Highway 1 MiddlePaso Robles8/19/2009 14.81Flush Top Flush Mount 20.365.5532S/13E-30F02Highway 1 MiddlePaso Robles5/12/2009 14.34Flush Top Flush Mount 20.366.0232S/13E-30F02Highway 1 MiddlePaso Robles4/7/2009 12.28Flush Top Flush Mount 20.368.08P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 121~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F03Highway 1 DeepCareaga10/9/2018 15.48 Stove Pipe Top of Steel 23.167.6832S/13E-30F03Highway 1 DeepCareaga7/10/2018 16.11 Stove Pipe Top of Steel 23.167.0532S/13E-30F03Highway 1 DeepCareaga4/10/2018 12.16 Stove Pipe Top of Steel 23.1611.0032S/13E-30F03Highway 1 DeepCareaga1/10/2018 12.85 Stove Pipe Top of Steel 23.1610.3132S/13E-30F03Highway 1 DeepCareaga10/10/2017 14.70 Stove Pipe Top of Steel 23.168.4632S/13E-30F03Highway 1 DeepCareaga7/11/2017 13.64 Stove Pipe Top of Steel 23.169.5232S/13E-30F03Highway 1 DeepCareaga4/11/2017 12.36 Stove Pipe Top of Steel 23.1610.8032S/13E-30F03Highway 1 DeepCareaga1/10/2017 14.25 Stove Pipe Top of Steel 23.168.9132S/13E-30F03Highway 1 DeepCareaga10/12/2016 17.82 Stove Pipe Top of Steel 23.165.3432S/13E-30F03Highway 1 DeepCareaga7/19/2016 17.22 Stove Pipe Top of Steel 23.165.9432S/13E-30F03Highway 1 DeepCareaga4/12/2016 14.90 Stove Pipe Top of Steel 23.168.2632S/13E-30F03Highway 1 DeepCareaga1/12/2016 14.84 Stove Pipe Top of Steel 23.168.3232S/13E-30F03Highway 1 DeepCareaga10/13/2015 18.87 Stove Pipe Top of Steel 23.164.2932S/13E-30F03Highway 1 DeepCareaga7/14/2015 18.87 Stove Pipe Top of Steel 23.164.2932S/13E-30F03Highway 1 DeepCareaga4/14/2015 17.92 Stove Pipe Top of Steel 23.165.2432S/13E-30F03Highway 1 DeepCareaga1/13/2015 14.13 Stove Pipe Top of Steel 23.169.0332S/13E-30F03Highway 1 DeepCareaga10/14/2014 18.98 Stove Pipe Top of Steel 23.164.1832S/13E-30F03Highway 1 DeepCareaga7/29/2014 18.62 Stove Pipe Top of Steel 23.164.5432S/13E-30F03Highway 1 DeepCareaga6/4/2014 22.27 Stove Pipe Top of Steel 23.160.8932S/13E-30F03Highway 1 DeepCareaga5/5/2014 21.34 Stove Pipe Top of Steel 23.161.8232S/13E-30F03Highway 1 DeepCareaga4/15/2014 16.14 Stove Pipe Top of Steel 23.167.0232S/13E-30F03Highway 1 DeepCareaga1/14/2014 15.35 Stove Pipe Top of Steel 23.167.8132S/13E-30F03Highway 1 DeepCareaga10/14/2013 17.30 Stove Pipe Top of Steel 23.165.8632S/13E-30F03Highway 1 DeepCareaga7/9/2013 16.61 Stove Pipe Top of Steel 23.166.5532S/13E-30F03Highway 1 DeepCareaga4/10/2013 14.69 Stove Pipe Top of Steel 23.168.4732S/13E-30F03Highway 1 DeepCareaga1/14/2013 12.62 Stove Pipe Top of Steel 23.1610.5432S/13E-30F03Highway 1 DeepCareaga10/30/2012 14.61 Stove Pipe Top of Steel 23.168.5532S/13E-30F03Highway 1 DeepCareaga7/24/2012 14.50 Stove Pipe Top of Steel 23.168.6632S/13E-30F03Highway 1 DeepCareaga4/18/2012 10.43 Stove Pipe Top of Steel 23.1612.7332S/13E-30F03Highway 1 DeepCareaga1/12/2012 12.37 Stove Pipe Top of Steel 23.1610.7932S/13E-30F03Highway 1 DeepCareaga11/21/2011 13.24 Stove Pipe Top of Steel 23.169.9232S/13E-30F03Highway 1 DeepCareaga7/26/2011 14.22 Stove Pipe Top of Steel 23.168.9432S/13E-30F03Highway 1 DeepCareaga4/20/2011 12.51 Stove Pipe Top of Steel 23.1610.6532S/13E-30F03Highway 1 DeepCareaga1/24/2011 12.67 Stove Pipe Top of Steel 23.1610.4932S/13E-30F03Highway 1 DeepCareaga10/21/2010 6.62 Stove Pipe Top of Steel 23.1616.5432S/13E-30F03Highway 1 DeepCareaga7/26/2010 17.32 Stove Pipe Top of Steel 23.165.8432S/13E-30F03Highway 1 DeepCareaga4/27/2010 11.38Flush Top Flush Mount 20.368.9832S/13E-30F03Highway 1 DeepCareaga1/28/2010 10.98Flush Top Flush Mount 20.369.3832S/13E-30F03Highway 1 DeepCareaga10/19/2009 14.18Flush Top Flush Mount 20.366.1832S/13E-30F03Highway 1 DeepCareaga8/19/2009 20.23Flush Top Flush Mount 20.360.1332S/13E-30F03Highway 1 DeepCareaga5/12/2009 17.68Flush Top Flush Mount 20.362.68P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 122~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N01Pier Ave ShallowAlluvium10/9/2018 9.35 Stove Pipe Top of Steel 16.136.7832S/13E-30N01Pier Ave ShallowAlluvium7/10/2018 9.46 Stove Pipe Top of Steel 16.136.6732S/13E-30N01Pier Ave ShallowAlluvium4/10/2018 9.04 Stove Pipe Top of Steel 16.137.0932S/13E-30N01Pier Ave ShallowAlluvium1/10/2018 8.97 Stove Pipe Top of Steel 16.137.1632S/13E-30N01Pier Ave ShallowAlluvium10/10/2017 9.35 Stove Pipe Top of Steel 16.136.7832S/13E-30N01Pier Ave ShallowAlluvium7/11/2017 9.00 Stove Pipe Top of Steel 16.137.1332S/13E-30N01Pier Ave ShallowAlluvium4/11/2017 8.70 Stove Pipe Top of Steel 16.137.4332S/13E-30N01Pier Ave ShallowAlluvium1/10/2017 7.89 Stove Pipe Top of Steel 16.138.2432S/13E-30N01Pier Ave ShallowAlluvium10/12/2016 10.21 Stove Pipe Top of Steel 16.135.9232S/13E-30N01Pier Ave ShallowAlluvium7/19/2016 9.91 Stove Pipe Top of Steel 16.136.2232S/13E-30N01Pier Ave ShallowAlluvium4/12/2016 8.93 Stove Pipe Top of Steel 16.137.2032S/13E-30N01Pier Ave ShallowAlluvium1/12/2016 8.73 Stove Pipe Top of Steel 16.137.4032S/13E-30N01Pier Ave ShallowAlluvium10/13/2015 10.11 Stove Pipe Top of Steel 16.136.0232S/13E-30N01Pier Ave ShallowAlluvium7/14/2015 9.91 Stove Pipe Top of Steel 16.136.2232S/13E-30N01Pier Ave ShallowAlluvium4/14/2015 9.51 Stove Pipe Top of Steel 16.136.6232S/13E-30N01Pier Ave ShallowAlluvium1/13/2015 9.03 Stove Pipe Top of Steel 16.137.1032S/13E-30N01Pier Ave ShallowAlluvium10/14/2014 9.95 Stove Pipe Top of Steel 16.136.1832S/13E-30N01Pier Ave ShallowAlluvium7/29/2014 9.88 Stove Pipe Top of Steel 16.136.2532S/13E-30N01Pier Ave ShallowAlluvium6/4/2014 9.54 Stove Pipe Top of Steel 16.136.5932S/13E-30N01Pier Ave ShallowAlluvium4/15/2014 9.17 Stove Pipe Top of Steel 16.136.9632S/13E-30N01Pier Ave ShallowAlluvium1/14/2014 9.61 Stove Pipe Top of Steel 16.136.5232S/13E-30N01Pier Ave ShallowAlluvium10/14/2013 9.86 Stove Pipe Top of Steel 16.136.2732S/13E-30N01Pier Ave ShallowAlluvium7/9/2013 9.40 Stove Pipe Top of Steel 16.136.7332S/13E-30N01Pier Ave ShallowAlluvium4/10/2013 8.98 Stove Pipe Top of Steel 16.137.1532S/13E-30N01Pier Ave ShallowAlluvium1/14/2013 8.60 Stove Pipe Top of Steel 16.137.5332S/13E-30N01Pier Ave ShallowAlluvium10/29/2012 8.96 Stove Pipe Top of Steel 16.137.1732S/13E-30N01Pier Ave ShallowAlluvium7/23/2012 8.54 Stove Pipe Top of Steel 16.137.5932S/13E-30N01Pier Ave ShallowAlluvium4/18/2012 8.53 Stove Pipe Top of Steel 16.137.6032S/13E-30N01Pier Ave ShallowAlluvium1/9/2012 8.74 Stove Pipe Top of Steel 16.137.3932S/13E-30N01Pier Ave ShallowAlluvium11/21/2011 8.78 Stove Pipe Top of Steel 16.137.3532S/13E-30N01Pier Ave ShallowAlluvium7/26/2011 9.01 Stove Pipe Top of Steel 16.137.1232S/13E-30N01Pier Ave ShallowAlluvium4/20/2011 8.59 Stove Pipe Top of Steel 16.137.5432S/13E-30N01Pier Ave ShallowAlluvium1/24/2011 8.18 Stove Pipe Top of Steel 16.137.9532S/13E-30N01Pier Ave ShallowAlluvium10/21/2010 9.99 Stove Pipe Top of Steel 16.136.1432S/13E-30N01Pier Ave ShallowAlluvium7/27/2010 8.97 Stove Pipe Top of Steel 16.137.1632S/13E-30N01Pier Ave ShallowAlluvium4/27/2010 6.14Flush Top Flush Mount 13.537.3932S/13E-30N01Pier Ave ShallowAlluvium1/26/2010 4.90Flush Top Flush Mount 13.538.6332S/13E-30N01Pier Ave ShallowAlluvium10/20/2009 6.53Flush Top Flush Mount 13.537.0032S/13E-30N01Pier Ave ShallowAlluvium8/20/2009 6.71Flush Top Flush Mount 13.536.8232S/13E-30N01Pier Ave ShallowAlluvium5/11/2009 6.03Flush Top Flush Mount 13.537.5032S/13E-30N01Pier Ave ShallowAlluvium4/7/2009 5.83Flush Top Flush Mount 13.537.70P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 123~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N03Pier Ave MiddlePaso Robles10/9/2018 8.37 Stove Pipe Top of Steel 16.137.7632S/13E-30N03Pier Ave MiddlePaso Robles7/10/2018 9.12 Stove Pipe Top of Steel 16.137.0132S/13E-30N03Pier Ave MiddlePaso Robles4/10/2018 7.50 Stove Pipe Top of Steel 16.138.6332S/13E-30N03Pier Ave MiddlePaso Robles1/10/2018 7.61 Stove Pipe Top of Steel 16.138.5232S/13E-30N03Pier Ave MiddlePaso Robles10/10/2017 8.61 Stove Pipe Top of Steel 16.137.5232S/13E-30N03Pier Ave MiddlePaso Robles7/11/2017 8.84 Stove Pipe Top of Steel 16.137.2932S/13E-30N03Pier Ave MiddlePaso Robles4/11/2017 7.55 Stove Pipe Top of Steel 16.138.5832S/13E-30N03Pier Ave MiddlePaso Robles1/10/2017 7.11 Stove Pipe Top of Steel 16.139.0232S/13E-30N03Pier Ave MiddlePaso Robles10/12/2016 10.13 Stove Pipe Top of Steel 16.136.0032S/13E-30N03Pier Ave MiddlePaso Robles7/19/2016 10.62 Stove Pipe Top of Steel 16.135.5132S/13E-30N03Pier Ave MiddlePaso Robles4/12/2016 9.21 Stove Pipe Top of Steel 16.136.9232S/13E-30N03Pier Ave MiddlePaso Robles1/12/2016 7.98 Stove Pipe Top of Steel 16.138.1532S/13E-30N03Pier Ave MiddlePaso Robles10/13/2015 10.48 Stove Pipe Top of Steel 16.135.6532S/13E-30N03Pier Ave MiddlePaso Robles7/14/2015 10.88 Stove Pipe Top of Steel 16.135.2532S/13E-30N03Pier Ave MiddlePaso Robles4/14/2015 11.88 Stove Pipe Top of Steel 16.134.2532S/13E-30N03Pier Ave MiddlePaso Robles1/13/2015 9.40 Stove Pipe Top of Steel 16.136.7332S/13E-30N03Pier Ave MiddlePaso Robles10/14/2014 10.52 Stove Pipe Top of Steel 16.135.6132S/13E-30N03Pier Ave MiddlePaso Robles7/29/2014 10.22 Stove Pipe Top of Steel 16.135.9132S/13E-30N03Pier Ave MiddlePaso Robles6/4/2014 11.33 Stove Pipe Top of Steel 16.134.8032S/13E-30N03Pier Ave MiddlePaso Robles4/15/2014 9.31 Stove Pipe Top of Steel 16.136.8232S/13E-30N03Pier Ave MiddlePaso Robles1/14/2014 10.26 Stove Pipe Top of Steel 16.135.8732S/13E-30N03Pier Ave MiddlePaso Robles10/14/2013 10.72 Stove Pipe Top of Steel 16.135.4132S/13E-30N03Pier Ave MiddlePaso Robles7/9/2013 10.36 Stove Pipe Top of Steel 16.135.7732S/13E-30N03Pier Ave MiddlePaso Robles4/10/2013 8.26 Stove Pipe Top of Steel 16.137.8732S/13E-30N03Pier Ave MiddlePaso Robles1/14/2013 7.71 Stove Pipe Top of Steel 16.138.4232S/13E-30N03Pier Ave MiddlePaso Robles10/29/2012 8.01 Stove Pipe Top of Steel 16.138.1232S/13E-30N03Pier Ave MiddlePaso Robles7/23/2012 9.15 Stove Pipe Top of Steel 16.136.9832S/13E-30N03Pier Ave MiddlePaso Robles4/18/2012 6.72 Stove Pipe Top of Steel 16.139.4132S/13E-30N03Pier Ave MiddlePaso Robles1/11/2012 7.17 Stove Pipe Top of Steel 16.138.9632S/13E-30N03Pier Ave MiddlePaso Robles11/21/2011 6.45 Stove Pipe Top of Steel 16.139.6832S/13E-30N03Pier Ave MiddlePaso Robles7/26/2011 7.59 Stove Pipe Top of Steel 16.138.5432S/13E-30N03Pier Ave MiddlePaso Robles4/20/2011 6.65 Stove Pipe Top of Steel 16.139.4832S/13E-30N03Pier Ave MiddlePaso Robles1/24/2011 6.68 Stove Pipe Top of Steel 16.139.4532S/13E-30N03Pier Ave MiddlePaso Robles10/21/2010 10.76 Stove Pipe Top of Steel 16.135.3732S/13E-30N03Pier Ave MiddlePaso Robles7/27/2010 9.53 Stove Pipe Top of Steel 16.136.6032S/13E-30N03Pier Ave MiddlePaso Robles4/27/2010 5.26Flush Top Flush Mount 13.538.2732S/13E-30N03Pier Ave MiddlePaso Robles1/26/2010 5.88Flush Top Flush Mount 13.537.6532S/13E-30N03Pier Ave MiddlePaso Robles10/20/2009 6.56Flush Top Flush Mount 13.536.9732S/13E-30N03Pier Ave MiddlePaso Robles8/20/2009 7.50Flush Top Flush Mount 13.536.0332S/13E-30N03Pier Ave MiddlePaso Robles5/12/2009 6.33Flush Top Flush Mount 13.537.20P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 124~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N02Pier Ave DeepPaso Robles10/9/2018 10.77 Stove Pipe Top of Steel 16.135.3632S/13E-30N02Pier Ave DeepPaso Robles7/10/2018 10.23 Stove Pipe Top of Steel 16.135.9032S/13E-30N02Pier Ave DeepPaso Robles4/10/2018 5.96 Stove Pipe Top of Steel 16.1310.1732S/13E-30N02Pier Ave DeepPaso Robles1/10/2018 7.43 Stove Pipe Top of Steel 16.138.7032S/13E-30N02Pier Ave DeepPaso Robles10/10/2017 10.40 Stove Pipe Top of Steel 16.135.7332S/13E-30N02Pier Ave DeepPaso Robles7/11/2017 8.38 Stove Pipe Top of Steel 16.137.7532S/13E-30N02Pier Ave DeepPaso Robles4/11/2017 5.35 Stove Pipe Top of Steel 16.1310.7832S/13E-30N02Pier Ave DeepPaso Robles1/10/2017 7.34 Stove Pipe Top of Steel 16.138.7932S/13E-30N02Pier Ave DeepPaso Robles10/12/2016 13.44 Stove Pipe Top of Steel 16.132.6932S/13E-30N02Pier Ave DeepPaso Robles7/19/2016 12.40 Stove Pipe Top of Steel 16.133.7332S/13E-30N02Pier Ave DeepPaso Robles4/12/2016 8.57 Stove Pipe Top of Steel 16.137.5632S/13E-30N02Pier Ave DeepPaso Robles1/12/2016 7.48 Stove Pipe Top of Steel 16.138.6532S/13E-30N02Pier Ave DeepPaso Robles10/13/2015 14.14 Stove Pipe Top of Steel 16.131.9932S/13E-30N02Pier Ave DeepPaso Robles7/14/2015 13.55 Stove Pipe Top of Steel 16.132.5832S/13E-30N02Pier Ave DeepPaso Robles4/14/2015 10.02 Stove Pipe Top of Steel 16.136.1132S/13E-30N02Pier Ave DeepPaso Robles1/13/2015 7.85 Stove Pipe Top of Steel 16.138.2832S/13E-30N02Pier Ave DeepPaso Robles10/14/2014 13.69 Stove Pipe Top of Steel 16.132.4432S/13E-30N02Pier Ave DeepPaso Robles7/29/2014 13.27 Stove Pipe Top of Steel 16.132.8632S/13E-30N02Pier Ave DeepPaso Robles6/4/2014 15.20 Stove Pipe Top of Steel 16.130.9332S/13E-30N02Pier Ave DeepPaso Robles5/5/2014 13.19 Stove Pipe Top of Steel 16.132.9432S/13E-30N02Pier Ave DeepPaso Robles4/15/2014 8.57 Stove Pipe Top of Steel 16.137.5632S/13E-30N02Pier Ave DeepPaso Robles1/14/2014 9.30 Stove Pipe Top of Steel 16.136.8332S/13E-30N02Pier Ave DeepPaso Robles10/14/2013 12.13 Stove Pipe Top of Steel 16.134.0032S/13E-30N02Pier Ave DeepPaso Robles7/9/2013 11.05 Stove Pipe Top of Steel 16.135.0832S/13E-30N02Pier Ave DeepPaso Robles4/10/2013 7.06 Stove Pipe Top of Steel 16.139.0732S/13E-30N02Pier Ave DeepPaso Robles1/14/2013 4.98 Stove Pipe Top of Steel 16.1311.1532S/13E-30N02Pier Ave DeepPaso Robles10/29/2012 8.52 Stove Pipe Top of Steel 16.137.6132S/13E-30N02Pier Ave DeepPaso Robles7/23/2012 8.31 Stove Pipe Top of Steel 16.137.8232S/13E-30N02Pier Ave DeepPaso Robles4/18/2012 3.45 Stove Pipe Top of Steel 16.1312.6832S/13E-30N02Pier Ave DeepPaso Robles1/11/2012 4.88 Stove Pipe Top of Steel 16.1311.2532S/13E-30N02Pier Ave DeepPaso Robles11/21/2011 5.35 Stove Pipe Top of Steel 16.1310.7832S/13E-30N02Pier Ave DeepPaso Robles7/26/2011 7.25 Stove Pipe Top of Steel 16.138.8832S/13E-30N02Pier Ave DeepPaso Robles4/20/2011 3.53Flush Top Flush Mount 13.5310.0032S/13E-30N02Pier Ave DeepPaso Robles1/24/2011 3.67Flush Top Flush Mount 13.539.8632S/13E-30N02Pier Ave DeepPaso Robles10/21/2010 10.42Flush Top Flush Mount 13.533.1132S/13E-30N02Pier Ave DeepPaso Robles7/27/2010 10.02Flush Top Flush Mount 13.533.5132S/13E-30N02Pier Ave DeepPaso Robles4/27/2010 6.14Flush Top Flush Mount 13.537.3932S/13E-30N02Pier Ave DeepPaso Robles2/25/2010 1.72Flush Top Flush Mount 13.5311.8132S/13E-30N02Pier Ave DeepPaso Robles2/25/2010 1.72Flush Top Flush Mount 13.5311.8132S/13E-30N02Pier Ave DeepPaso Robles1/26/2010 3.72Flush Top Flush Mount 13.539.8132S/13E-30N02Pier Ave DeepPaso Robles10/20/2009 7.38Flush Top Flush Mount 13.536.1532S/13E-30N02Pier Ave DeepPaso Robles8/20/2009 11.94Flush Top Flush Mount 13.531.5932S/13E-30N02Pier Ave DeepPaso Robles5/11/2009 6.98Flush Top Flush Mount 13.536.55P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 125~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H10Oceano GreenPaso Robles10/9/2018 27.35Manhole Top Flush Mount 34.637.2832S/13E-31H10Oceano GreenPaso Robles7/10/2018 27.94Manhole Top Flush Mount 34.636.6932S/13E-31H10Oceano GreenPaso Robles4/10/2018 24.15Manhole Top Flush Mount 34.6310.4832S/13E-31H10Oceano GreenPaso Robles1/10/2018 24.15Manhole Top Flush Mount 34.6310.4832S/13E-31H10Oceano GreenPaso Robles10/10/2017 26.53Manhole Top Flush Mount 34.638.1032S/13E-31H10Oceano GreenPaso Robles7/11/2017 25.11Manhole Top Flush Mount 34.639.5232S/13E-31H10Oceano GreenPaso Robles4/11/2017 21.98Manhole Top Flush Mount 34.6312.6532S/13E-31H10Oceano GreenPaso Robles1/10/2017 24.50Manhole Top Flush Mount 34.6310.1332S/13E-31H10Oceano GreenPaso Robles10/12/2016 30.74Manhole Top Flush Mount 34.633.8932S/13E-31H10Oceano GreenPaso Robles7/19/2016 29.77Manhole Top Flush Mount 34.634.8632S/13E-31H10Oceano GreenPaso Robles4/12/2016 25.64Manhole Top Flush Mount 34.638.9932S/13E-31H10Oceano GreenPaso Robles1/12/2016 20.83Manhole Top of Casing 30.499.6632S/13E-31H10Oceano GreenPaso Robles10/13/2015 31.88Manhole Top Flush Mount 34.632.7532S/13E-31H10Oceano GreenPaso Robles7/14/2015 31.61Manhole Top Flush Mount 34.633.0232S/13E-31H10Oceano GreenPaso Robles4/14/2015 28.81Manhole Top Flush Mount 34.635.8232S/13E-31H10Oceano GreenPaso Robles1/13/2015 26.11Manhole Top Flush Mount 34.638.5232S/13E-31H10Oceano GreenPaso Robles10/14/2014 31.64Manhole Top Flush Mount 34.632.9932S/13E-31H10Oceano GreenPaso Robles7/29/2014 32.30Manhole Top Flush Mount 34.632.3332S/13E-31H10Oceano GreenPaso Robles6/4/2014 32.82Manhole Top Flush Mount 34.631.8132S/13E-31H10Oceano GreenPaso Robles4/15/2014 27.98Manhole Top Flush Mount 34.636.6532S/13E-31H10Oceano GreenPaso Robles1/14/2014 28.55Manhole Top Flush Mount 34.636.0832S/13E-31H10Oceano GreenPaso Robles10/14/2013 30.31Manhole Top Flush Mount 34.634.3232S/13E-31H10Oceano GreenPaso Robles7/9/2013 29.98Manhole Top Flush Mount 34.634.6532S/13E-31H10Oceano GreenPaso Robles4/10/2013 23.30Manhole Top Flush Mount 34.6311.3332S/13E-31H10Oceano GreenPaso Robles1/14/2013 23.59Manhole Top Flush Mount 34.6311.0432S/13E-31H10Oceano GreenPaso Robles10/30/2012 27.31Manhole Top Flush Mount 34.637.3232S/13E-31H10Oceano GreenPaso Robles7/25/2012 27.15Manhole Top Flush Mount 34.637.4832S/13E-31H10Oceano GreenPaso Robles4/18/2012 21.65Manhole Top Flush Mount 34.6312.9832S/13E-31H10Oceano GreenPaso Robles1/12/2012 23.29Manhole Top Flush Mount 34.6311.3432S/13E-31H10Oceano GreenPaso Robles11/21/2011 22.46Manhole Top Flush Mount 34.6312.1732S/13E-31H10Oceano GreenPaso Robles7/26/2011 25.51Manhole Top Flush Mount 34.639.1232S/13E-31H10Oceano GreenPaso Robles4/20/2011 114.79 Manhole Top Flush Mount 34.63-80.1632S/13E-31H10Oceano GreenPaso Robles1/24/2011 106.59 Manhole Top Flush Mount 34.63-71.9632S/13E-31H10Oceano GreenPaso Robles10/21/2010 112.71 Manhole Top of Casing 30.49-82.2232S/13E-31H10Oceano GreenPaso Robles7/26/2010 95.61Manhole Top of Casing 30.49-65.1232S/13E-31H10Oceano GreenPaso Robles4/26/2010 63.90Manhole Top of Casing 30.49-33.4132S/13E-31H10Oceano GreenPaso Robles1/27/2010 43.71Manhole Top of Casing 30.49-13.2232S/13E-31H10Oceano GreenPaso Robles10/20/2009 29.20Manhole Top of Casing 30.491.2932S/13E-31H10Oceano GreenPaso Robles8/19/2009 24.55Manhole Top of Casing 30.495.9432S/13E-31H10Oceano GreenPaso Robles4/7/2009 28.12Manhole Top of Casing 30.492.37P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 126~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H11Oceano BluePaso Robles10/9/2018 28.82Manhole Top Flush Mount 34.635.8132S/13E-31H11Oceano BluePaso Robles7/10/2018 28.60Manhole Top Flush Mount 34.636.0332S/13E-31H11Oceano BluePaso Robles4/10/2018 23.98Manhole Top Flush Mount 34.6310.6532S/13E-31H11Oceano BluePaso Robles1/10/2018 25.08Manhole Top Flush Mount 34.639.5532S/13E-31H11Oceano BluePaso Robles10/10/2017 28.03Manhole Top Flush Mount 34.636.632S/13E-31H11Oceano BluePaso Robles7/11/2017 26.18Manhole Top Flush Mount 34.638.4532S/13E-31H11Oceano BluePaso Robles4/11/2017 21.90Manhole Top Flush Mount 34.6312.7332S/13E-31H11Oceano BluePaso Robles1/10/2017 25.00Manhole Top Flush Mount 34.639.6332S/13E-31H11Oceano BluePaso Robles10/12/2016 30.74Manhole Top Flush Mount 34.633.8932S/13E-31H11Oceano BluePaso Robles7/19/2016 29.62Manhole Top Flush Mount 34.635.0132S/13E-31H11Oceano BluePaso Robles4/12/2016 25.13Manhole Top Flush Mount 34.639.5032S/13E-31H11Oceano BluePaso Robles1/12/2016 22.00Manhole Top of Casing 30.548.5432S/13E-31H11Oceano BluePaso Robles10/13/2015 32.70Manhole Top Flush Mount 34.631.9332S/13E-31H11Oceano BluePaso Robles7/14/2015 32.21Manhole Top Flush Mount 34.632.4232S/13E-31H11Oceano BluePaso Robles4/14/2015 28.41Manhole Top Flush Mount 34.636.2232S/13E-31H11Oceano BluePaso Robles1/13/2015 25.98Manhole Top Flush Mount 34.638.6532S/13E-31H11Oceano BluePaso Robles10/14/2014 32.70Manhole Top Flush Mount 34.631.9332S/13E-31H11Oceano BluePaso Robles7/29/2014 32.69Manhole Top Flush Mount 34.631.9432S/13E-31H11Oceano BluePaso Robles6/4/2014 34.02Manhole Top Flush Mount 34.630.6132S/13E-31H11Oceano BluePaso Robles4/15/2014 27.07Manhole Top Flush Mount 34.637.5632S/13E-31H11Oceano BluePaso Robles1/14/2014 27.86Manhole Top Flush Mount 34.636.7732S/13E-31H11Oceano BluePaso Robles10/14/2013 30.98Manhole Top Flush Mount 34.633.6532S/13E-31H11Oceano BluePaso Robles7/9/2013 29.36Manhole Top Flush Mount 34.635.2732S/13E-31H11Oceano BluePaso Robles4/10/2013 24.45Manhole Top Flush Mount 34.6310.1832S/13E-31H11Oceano BluePaso Robles1/14/2013 23.14Manhole Top Flush Mount 34.6311.4932S/13E-31H11Oceano BluePaso Robles10/30/2012 27.68Manhole Top Flush Mount 34.636.9532S/13E-31H11Oceano BluePaso Robles7/25/2012 27.18Manhole Top Flush Mount 34.637.4532S/13E-31H11Oceano BluePaso Robles4/18/2012 20.10Manhole Top Flush Mount 34.6314.5332S/13E-31H11Oceano BluePaso Robles1/12/2012 22.26Manhole Top Flush Mount 34.6312.3732S/13E-31H11Oceano BluePaso Robles11/21/2011 22.73Manhole Top Flush Mount 34.6311.9032S/13E-31H11Oceano BluePaso Robles7/26/2011 25.29Manhole Top Flush Mount 34.639.3432S/13E-31H11Oceano BluePaso Robles4/20/2011 22.59Manhole Top Flush Mount 34.6312.0432S/13E-31H11Oceano BluePaso Robles1/24/2011 24.87Manhole Top Flush Mount 34.639.7632S/13E-31H11Oceano BluePaso Robles10/21/2010 30.11Manhole Top of Casing 30.540.4332S/13E-31H11Oceano BluePaso Robles7/26/2010 24.74Manhole Top of Casing 30.545.8032S/13E-31H11Oceano BluePaso Robles4/26/2010 18.52Manhole Top of Casing 30.5412.0232S/13E-31H11Oceano BluePaso Robles1/27/2010 22.06Manhole Top of Casing 30.548.4832S/13E-31H11Oceano BluePaso Robles10/20/2009 27.50Manhole Top of Casing 30.543.0432S/13E-31H11Oceano BluePaso Robles8/19/2009 24.65Manhole Top of Casing 30.545.8932S/13E-31H11Oceano BluePaso Robles4/7/2009 27.65Manhole Top of Casing 30.542.89P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 127~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H12Oceano SilverCareaga10/9/2018 39.15Manhole Top Flush Mount 34.63-4.5232S/13E-31H12Oceano SilverCareaga7/10/2018 28.92Manhole Top Flush Mount 34.635.7132S/13E-31H12Oceano SilverCareaga4/10/2018 23.50Manhole Top Flush Mount 34.6311.1332S/13E-31H12Oceano SilverCareaga1/10/2018 23.90Manhole Top Flush Mount 34.6310.7332S/13E-31H12Oceano SilverCareaga10/10/2017 28.06Manhole Top Flush Mount 34.636.5732S/13E-31H12Oceano SilverCareaga7/11/2017 24.09Manhole Top Flush Mount 34.6310.5432S/13E-31H12Oceano SilverCareaga4/11/2017 21.14Manhole Top Flush Mount 34.6313.4932S/13E-31H12Oceano SilverCareaga1/10/2017 24.80Manhole Top Flush Mount 34.639.8332S/13E-31H12Oceano SilverCareaga10/12/2016 31.00Manhole Top Flush Mount 34.633.6332S/13E-31H12Oceano SilverCareaga7/19/2016 26.95Manhole Top of Casing 30.483.5332S/13E-31H12Oceano SilverCareaga4/12/2016 25.32Manhole Top Flush Mount 34.639.3132S/13E-31H12Oceano SilverCareaga1/12/2016 21.44Manhole Top of Casing 30.489.0432S/13E-31H12Oceano SilverCareaga10/13/2015 32.30Manhole Top Flush Mount 34.632.3332S/13E-31H12Oceano SilverCareaga7/14/2015 32.58Manhole Top Flush Mount 34.632.0532S/13E-31H12Oceano SilverCareaga4/14/2015 30.38Manhole Top Flush Mount 34.634.2532S/13E-31H12Oceano SilverCareaga1/13/2015 26.19Manhole Top Flush Mount 34.638.4432S/13E-31H12Oceano SilverCareaga10/14/2014 43.01Manhole Top Flush Mount 34.63-8.3832S/13E-31H12Oceano SilverCareaga7/29/2014 33.65Manhole Top Flush Mount 34.630.9832S/13E-31H12Oceano SilverCareaga6/4/2014 36.33Manhole Top Flush Mount 34.63-1.7032S/13E-31H12Oceano SilverCareaga4/15/2014 42.20Manhole Top Flush Mount 34.63-7.5732S/13E-31H12Oceano SilverCareaga1/14/2014 27.78Manhole Top Flush Mount 34.636.8532S/13E-31H12Oceano SilverCareaga10/14/2013 30.92Manhole Top Flush Mount 34.633.7132S/13E-31H12Oceano SilverCareaga7/9/2013 30.91Manhole Top Flush Mount 34.633.7232S/13E-31H12Oceano SilverCareaga4/10/2013 26.08Manhole Top Flush Mount 34.638.5532S/13E-31H12Oceano SilverCareaga1/14/2013 23.12Manhole Top Flush Mount 34.6311.5132S/13E-31H12Oceano SilverCareaga10/30/2012 27.14Manhole Top Flush Mount 34.637.4932S/13E-31H12Oceano SilverCareaga7/25/2012 27.68Manhole Top Flush Mount 34.636.9532S/13E-31H12Oceano SilverCareaga4/18/2012 20.13Manhole Top Flush Mount 34.6314.532S/13E-31H12Oceano SilverCareaga1/11/2012 23.00Manhole Top Flush Mount 34.6311.6332S/13E-31H12Oceano SilverCareaga11/21/2011 22.85Manhole Top Flush Mount 34.6311.7832S/13E-31H12Oceano SilverCareaga7/26/2011 25.23Manhole Top Flush Mount 34.639.432S/13E-31H12Oceano SilverCareaga4/20/2011 21.27Manhole Top Flush Mount 34.6313.3632S/13E-31H12Oceano SilverCareaga1/24/2011 22.02Manhole Top Flush Mount 34.6312.6132S/13E-31H12Oceano SilverCareaga10/21/2010 29.11Manhole Top Flush Mount 34.635.5232S/13E-31H12Oceano SilverCareaga7/26/2010 24.24Manhole Well Casing 30.486.2432S/13E-31H12Oceano SilverCareaga4/26/2010 19.04Manhole Well Casing 30.4811.4432S/13E-31H12Oceano SilverCareaga1/27/2010 21.05Manhole Well Casing 30.489.4332S/13E-31H12Oceano SilverCareaga10/20/2009 27.52Manhole Well Casing 30.482.9632S/13E-31H12Oceano SilverCareaga8/19/2009 29.34Manhole Well Casing 30.481.1432S/13E-31H12Oceano SilverCareaga4/7/2009 31.32Manhole Well Casing 30.48-0.84P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 128~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H13Oceano YellowCareaga10/9/2018 37.38Manhole Top Flush Mount 34.63-2.7532S/13E-31H13Oceano YellowCareaga7/10/2018 28.90Manhole Top Flush Mount 34.635.7332S/13E-31H13Oceano YellowCareaga4/10/2018 23.55Manhole Top Flush Mount 34.6311.0832S/13E-31H13Oceano YellowCareaga1/10/2018 23.85Manhole Top Flush Mount 34.6310.7832S/13E-31H13Oceano YellowCareaga10/10/2017 27.96Manhole Top Flush Mount 34.636.6732S/13E-31H13Oceano YellowCareaga7/11/2017 23.68Manhole Top Flush Mount 34.6310.9532S/13E-31H13Oceano YellowCareaga4/11/2017 21.18Manhole Top Flush Mount 34.6313.4532S/13E-31H13Oceano YellowCareaga1/10/2017 24.79Manhole Top Flush Mount 34.639.8432S/13E-31H13Oceano YellowCareaga10/12/2016 30.91Manhole Top Flush Mount 34.633.7232S/13E-31H13Oceano YellowCareaga7/19/2016 29.58Manhole Top Flush Mount 34.635.0532S/13E-31H13Oceano YellowCareaga4/12/2016 25.25Manhole Top Flush Mount 34.639.3832S/13E-31H13Oceano YellowCareaga1/12/2016 21.66Manhole Top of Casing 30.528.8632S/13E-31H13Oceano YellowCareaga10/13/2015 32.28Manhole Top Flush Mount 34.632.3532S/13E-31H13Oceano YellowCareaga7/14/2015 32.60Manhole Top Flush Mount 34.632.0332S/13E-31H13Oceano YellowCareaga4/14/2015 30.42Manhole Top Flush Mount 34.634.2132S/13E-31H13Oceano YellowCareaga1/13/2015 26.32Manhole Top Flush Mount 34.638.3132S/13E-31H13Oceano YellowCareaga10/14/2014 41.12Manhole Top Flush Mount 34.63-6.4932S/13E-31H13Oceano YellowCareaga7/29/2014 33.72Manhole Top Flush Mount 34.630.9132S/13E-31H13Oceano YellowCareaga6/4/2014 36.55Manhole Top Flush Mount 34.63-1.9232S/13E-31H13Oceano YellowCareaga4/15/2014 39.06Manhole Top Flush Mount 34.63-4.4332S/13E-31H13Oceano YellowCareaga1/14/2014 27.80Manhole Top Flush Mount 34.636.8332S/13E-31H13Oceano YellowCareaga10/14/2013 30.83Manhole Top Flush Mount 34.633.8032S/13E-31H13Oceano YellowCareaga7/9/2013 30.41Manhole Top Flush Mount 34.634.2232S/13E-31H13Oceano YellowCareaga4/10/2013 26.09Manhole Top Flush Mount 34.638.5432S/13E-31H13Oceano YellowCareaga1/14/2013 23.25Manhole Top Flush Mount 34.6311.3832S/13E-31H13Oceano YellowCareaga10/30/2012 27.23Manhole Top Flush Mount 34.637.4032S/13E-31H13Oceano YellowCareaga7/25/2012 27.69Manhole Top Flush Mount 34.636.9432S/13E-31H13Oceano YellowCareaga4/18/2012 20.05Manhole Top Flush Mount 34.6314.5832S/13E-31H13Oceano YellowCareaga1/12/2012 23.08Manhole Top Flush Mount 34.6311.5532S/13E-31H13Oceano YellowCareaga11/21/2011 22.98Manhole Top Flush Mount 34.6311.6532S/13E-31H13Oceano YellowCareaga7/26/2011 26.73Manhole Top Flush Mount 34.637.9032S/13E-31H13Oceano YellowCareaga4/20/2011 21.30Manhole Top Flush Mount 34.6313.3332S/13E-31H13Oceano YellowCareaga1/24/2011 22.01Manhole Top Flush Mount 34.6312.6232S/13E-31H13Oceano YellowCareaga10/21/2010 28.22Manhole Well Casing 30.522.3032S/13E-31H13Oceano YellowCareaga7/26/2010 25.50Manhole Well Casing 30.525.0232S/13E-31H13Oceano YellowCareaga4/26/2010 19.17Manhole Well Casing 30.5211.3532S/13E-31H13Oceano YellowCareaga1/27/2010 20.58Manhole Well Casing 30.529.9432S/13E-31H13Oceano YellowCareaga10/20/2009 25.80Manhole Well Casing 30.524.7232S/13E-31H13Oceano YellowCareaga8/19/2009 31.04Manhole Well Casing 30.52-0.5232S/13E-31H13Oceano YellowCareaga4/7/2009 34.78Manhole Well Casing 30.52-4.26P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 129~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/36W-36L01 Oceano Dunes Middle Paso Robles10/9/2018 20.80 Stove Pipe Top of Steel 26.77 5.9712N/36W-36L01 Oceano Dunes Middle Paso Robles7/10/2018 20.74 Stove Pipe Top of Steel 26.776.0312N/36W-36L01 Oceano Dunes Middle Paso Robles4/10/2018 19.11 Stove Pipe Top of Steel 26.777.6612N/36W-36L01 Oceano Dunes Middle Paso Robles1/10/2018 19.32 Stove Pipe Top of Steel 26.777.4512N/36W-36L01 Oceano Dunes Middle Paso Robles10/10/2017 21.23 Stove Pipe Top of Steel 26.775.5412N/36W-36L01 Oceano Dunes Middle Paso Robles7/11/2017 21.59 Stove Pipe Top of Steel 26.775.1812N/36W-36L01 Oceano Dunes Middle Paso Robles4/11/2017 19.38 Stove Pipe Top of Steel 26.777.3912N/36W-36L01 Oceano Dunes Middle Paso Robles1/10/2017 19.70 Stove Pipe Top of Steel 26.777.0712N/36W-36L01 Oceano Dunes Middle Paso Robles10/12/2016 21.86 Stove Pipe Top of Steel 26.774.9112N/36W-36L01 Oceano Dunes Middle Paso Robles7/19/2016 22.21 Stove Pipe Top of Steel 26.774.5612N/36W-36L01 Oceano Dunes Middle Paso Robles4/12/2016 20.56 Stove Pipe Top of Steel 26.776.2112N/36W-36L01 Oceano Dunes Middle Paso Robles1/12/2016 18.76 Stove Pipe Top of Steel 26.778.0112N/36W-36L01 Oceano Dunes Middle Paso Robles10/13/2015 22.14 Stove Pipe Top of Steel 26.774.6312N/36W-36L01 Oceano Dunes Middle Paso Robles7/14/2015 21.84 Stove Pipe Top of Steel 26.774.9312N/36W-36L01 Oceano Dunes Middle Paso Robles4/14/2015 21.18 Stove Pipe Top of Steel 26.775.5912N/36W-36L01 Oceano Dunes Middle Paso Robles1/13/2015 19.89 Stove Pipe Top of Steel 26.776.8812N/36W-36L01 Oceano Dunes Middle Paso Robles10/14/2014 21.75 Stove Pipe Top of Steel 26.775.0212N/36W-36L01 Oceano Dunes Middle Paso Robles7/29/2014 21.57 Stove Pipe Top of Steel 26.775.2012N/36W-36L01 Oceano Dunes Middle Paso Robles6/4/2014 22.36 Stove Pipe Top of Steel 26.774.4112N/36W-36L01 Oceano Dunes Middle Paso Robles4/15/2014 19.89 Stove Pipe Top of Steel 26.776.8812N/36W-36L01 Oceano Dunes Middle Paso Robles1/14/2014 20.38 Stove Pipe Top of Steel 26.776.3912N/36W-36L01 Oceano Dunes Middle Paso Robles10/14/2013 21.71 Stove Pipe Top of Steel 26.775.0612N/36W-36L01 Oceano Dunes Middle Paso Robles7/9/2013 21.37 Stove Pipe Top of Steel 26.775.412N/36W-36L01 Oceano Dunes Middle Paso Robles4/10/2013 20.10 Stove Pipe Top of Steel 26.776.6712N/36W-36L01 Oceano Dunes Middle Paso Robles1/14/2013 18.62 Stove Pipe Top of Steel 26.778.1512N/36W-36L01 Oceano Dunes Middle Paso Robles10/31/2012 20.11 Stove Pipe Top of Steel 26.776.6612N/36W-36L01 Oceano Dunes Middle Paso Robles7/24/2012 19.42 Stove Pipe Top of Steel 26.777.3512N/36W-36L01 Oceano Dunes Middle Paso Robles4/20/2012 18.26 Stove Pipe Top of Steel 26.778.5112N/36W-36L01 Oceano Dunes Middle Paso Robles4/18/2012 23.83 Stove Pipe Top of Steel 26.772.9412N/36W-36L01 Oceano Dunes Middle Paso Robles1/11/2012 17.68 Stove Pipe Top of Steel 26.779.0912N/36W-36L01 Oceano Dunes Middle Paso Robles11/21/2011 18.08 Stove Pipe Top of Steel 26.778.6912N/36W-36L01 Oceano Dunes Middle Paso Robles7/26/2011 19.63 Stove Pipe Top of Steel 26.777.1412N/36W-36L01 Oceano Dunes Middle Paso Robles4/20/2011 18.26 Stove Pipe Top of Steel 26.778.5112N/36W-36L01 Oceano Dunes Middle Paso Robles1/24/2011 17.61 Stove Pipe Top of Steel 26.779.1612N/36W-36L01 Oceano Dunes Middle Paso Robles10/21/2010 20.75 Stove Pipe Top of Steel 26.776.0212N/36W-36L01 Oceano Dunes Middle Paso Robles7/27/2010 21.18 Stove Pipe Top of Steel 26.775.5912N/36W-36L01 Oceano Dunes Middle Paso Robles4/26/2010 15.94Flush Top Flush Mount 23.988.0412N/36W-36L01 Oceano Dunes Middle Paso Robles10/21/2009 17.72Flush Top Flush Mount 23.986.2612N/36W-36L01 Oceano Dunes Middle Paso Robles8/20/2009 19.16Flush Top Flush Mount 23.984.8212N/36W-36L01 Oceano Dunes Middle Paso Robles5/11/2009 17.68Flush Top Flush Mount 23.986.3012N/36W-36L01 Oceano Dunes Middle Paso Robles4/18/2009 15.95Flush Top Flush Mount 23.988.03P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 130~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/36W-36L02 Oceano Dunes DeepCareaga10/9/2018 25.10 Stove Pipe Top of Steel 26.771.6712N/36W-36L02 Oceano Dunes DeepCareaga7/10/2018 24.11 Stove Pipe Top of Steel 26.772.6612N/36W-36L02 Oceano Dunes DeepCareaga4/10/2018 16.02 Stove Pipe Top of Steel 26.7710.7512N/36W-36L02 Oceano Dunes DeepCareaga1/10/2018 19.11 Stove Pipe Top of Steel 26.777.6612N/36W-36L02 Oceano Dunes DeepCareaga10/10/2017 24.70 Stove Pipe Top of Steel 26.772.0712N/36W-36L02 Oceano Dunes DeepCareaga7/11/2017 23.65 Stove Pipe Top of Steel 26.773.1212N/36W-36L02 Oceano Dunes DeepCareaga4/10/2017 15.00 Stove Pipe Top of Steel 26.7711.7712N/36W-36L02 Oceano Dunes DeepCareaga1/10/2017 16.15 Stove Pipe Top of Steel 26.7710.6212N/36W-36L02 Oceano Dunes DeepCareaga10/12/2016 27.86 Stove Pipe Top of Steel 26.77-1.0912N/36W-36L02 Oceano Dunes DeepCareaga7/19/2016 25.76 Stove Pipe Top of Steel 26.771.0112N/36W-36L02 Oceano Dunes DeepCareaga4/12/2016 18.43 Stove Pipe Top of Steel 26.778.3412N/36W-36L02 Oceano Dunes DeepCareaga1/12/2016 16.27 Stove Pipe Top of Steel 26.7710.5012N/36W-36L02 Oceano Dunes DeepCareaga10/13/2015 27.17 Stove Pipe Top of Steel 26.77-0.4012N/36W-36L02 Oceano Dunes DeepCareaga7/14/2015 26.11 Stove Pipe Top of Steel 26.770.6612N/36W-36L02 Oceano Dunes DeepCareaga4/14/2015 22.24 Stove Pipe Top of Steel 26.774.5312N/36W-36L02 Oceano Dunes DeepCareaga1/13/2015 16.91 Stove Pipe Top of Steel 26.779.8612N/36W-36L02 Oceano Dunes DeepCareaga10/14/2014 26.30 Stove Pipe Top of Steel 26.770.4712N/36W-36L02 Oceano Dunes DeepCareaga7/29/2014 25.64 Stove Pipe Top of Steel 26.771.1312N/36W-36L02 Oceano Dunes DeepCareaga6/4/2014 25.22 Stove Pipe Top of Steel 26.771.5512N/36W-36L02 Oceano Dunes DeepCareaga4/15/2014 16.94 Stove Pipe Top of Steel 26.779.8312N/36W-36L02 Oceano Dunes DeepCareaga1/14/2014 18.76 Stove Pipe Top of Steel 26.778.0112N/36W-36L02 Oceano Dunes DeepCareaga10/14/2013 23.94 Stove Pipe Top of Steel 26.772.8312N/36W-36L02 Oceano Dunes DeepCareaga7/9/2013 23.15 Stove Pipe Top of Steel 26.773.6212N/36W-36L02 Oceano Dunes DeepCareaga4/10/2013 15.35 Stove Pipe Top of Steel 26.7711.4212N/36W-36L02 Oceano Dunes DeepCareaga1/14/2013 11.24 Stove Pipe Top of Steel 26.7715.5312N/36W-36L02 Oceano Dunes DeepCareaga10/31/2012 18.81 Stove Pipe Top of Steel 26.777.9612N/36W-36L02 Oceano Dunes DeepCareaga7/24/2012 19.05 Stove Pipe Top of Steel 26.777.7212N/36W-36L02 Oceano Dunes DeepCareaga4/18/2012 10.81 Stove Pipe Top of Steel 26.7715.9612N/36W-36L02 Oceano Dunes DeepCareaga1/11/2012 11.18 Stove Pipe Top of Steel 26.7715.5912N/36W-36L02 Oceano Dunes DeepCareaga11/21/2011 13.99 Stove Pipe Top of Steel 26.7712.7812N/36W-36L02 Oceano Dunes DeepCareaga7/26/2011 18.03 Stove Pipe Top of Steel 26.778.7412N/36W-36L02 Oceano Dunes DeepCareaga1/24/2011 9.37 Stove Pipe Top of Steel 26.7717.4012N/36W-36L02 Oceano Dunes DeepCareaga10/21/2010 19.77 Stove Pipe Top of Steel 26.777.0012N/36W-36L02 Oceano Dunes DeepCareaga7/27/2010 20.53 Stove Pipe Top of Steel 26.776.2412N/36W-36L02 Oceano Dunes DeepCareaga4/26/2010 9.24Flush Top Flush Mount 23.9814.7412N/36W-36L02 Oceano Dunes DeepCareaga10/21/2009 17.65Flush Top Flush Mount 23.986.3312N/36W-36L02 Oceano Dunes DeepCareaga8/20/2009 19.15Flush Top Flush Mount 23.984.8312N/36W-36L02 Oceano Dunes DeepCareaga5/11/2009 14.38Flush Top Flush Mount 23.989.60P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 131~SI Wi11t@rSolu1lons, Inc..
Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/35W-32C03County MW-3Paso Robles10/9/2018 43.85Flush Top Flush Mount 47.703.8512N/35W-32C03County MW-3Paso Robles7/10/2018 40.00Flush Top Flush Mount 47.707.7012N/35W-32C03County MW-3Paso Robles4/10/2018 32.80Flush Top Flush Mount 47.7014.9012N/35W-32C03County MW-3Paso Robles1/10/2018 35.10Flush Top Flush Mount 47.7012.6012N/35W-32C03County MW-3Paso Robles10/10/2017 42.05Flush Top Flush Mount 47.705.6512N/35W-32C03County MW-3Paso Robles7/11/2017 38.34Flush Top Flush Mount 47.709.3612N/35W-32C03County MW-3Paso Robles4/11/2017 28.44Flush Top Flush Mount 47.7019.2612N/35W-32C03County MW-3Paso Robles1/10/2017 34.85Flush Top Flush Mount 47.7012.8512N/35W-32C03County MW-3Paso Robles10/12/2016 47.49Flush Top Flush Mount 47.700.2112N/35W-32C03County MW-3Paso Robles7/19/2016 44.51Flush Top Flush Mount 47.703.1912N/35W-32C03County MW-3Paso Robles4/12/2016 36.41Flush Top Flush Mount 47.7011.2912N/35W-32C03County MW-3Paso Robles1/12/2016 36.48Flush Top Flush Mount 47.7011.2212N/35W-32C03County MW-3Paso Robles10/13/2015 51.21Flush Top Flush Mount 47.70-3.5112N/35W-32C03County MW-3Paso Robles7/14/2015 49.07Flush Top Flush Mount 47.70-1.3712N/35W-32C03County MW-3Paso Robles4/14/2015 44.00Flush Top Flush Mount 47.703.7012N/35W-32C03County MW-3Paso Robles1/13/2015 38.90Flush Top Flush Mount 47.708.8012N/35W-32C03County MW-3Paso Robles10/14/2014 50.50Flush Top Flush Mount 47.70-2.8012N/35W-32C03County MW-3Paso Robles7/29/2014 44.02Flush Top Flush Mount 47.703.6812N/35W-32C03County MW-3Paso Robles6/4/2014 45.46Flush Top Flush Mount 47.702.2412N/35W-32C03County MW-3Paso Robles4/15/2014 41.51Flush Top Flush Mount 47.706.1912N/35W-32C03County MW-3Paso Robles1/14/2014 41.00Flush Top Flush Mount 47.706.7012N/35W-32C03County MW-3Paso Robles10/14/2013 45.26Flush Top Flush Mount 47.702.4412N/35W-32C03County MW-3Paso Robles7/9/2013 43.83Flush Top Flush Mount 47.703.8712N/35W-32C03County MW-3Paso Robles4/10/2013 37.89Flush Top Flush Mount 47.709.8112N/35W-32C03County MW-3Paso Robles1/14/2013 32.26Flush Top Flush Mount 47.7015.4412N/35W-32C03County MW-3Paso Robles10/30/2012 40.05Flush Top Flush Mount 47.707.6512N/35W-32C03County MW-3Paso Robles7/25/2012 38.62Flush Top Flush Mount 47.709.0812N/35W-32C03County MW-3Paso Robles4/19/2012 23.02Flush Top Flush Mount 47.7024.68P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx1/15/2019Item 11.a. - Page 132~SI Wi11t@rSolu1lons, Inc..
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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-24B0110/9/2018 2,800 1,400 600 35 180 190 410 190 ND 2 0.15 ND 0.11 1.4 2.8 410 ND ND 5,040 220.0020 50032S/12E-24B014/11/2018 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 2.20.0036 27532S/12E-24B01 10/11/2017 3,100 1,400 590 36 180 190 430 190 ND 2.3 0.17 0.130.11 1.4 0.64 430NDND 5,180 1.7 0.0005 218832S/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 1.8 0.0034 29832S/12E-24B01 10/11/2016 3,100 1,400 700 44 210 220 450 190 0.26 2.1 0.18 ND0.12 1.6 4.1450NDND 5,020 1.3 0.0029 34132S/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 0.73 0.0034 29232S/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 0.54 0.0030 33832S/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 0.72 0.0026 38232S/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 0.52 0.0022 44832S/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 0.67 NA NA32S/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 0.62 0.0020 50032S/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 0.72 0.0024 41432S/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 0.71 0.0023 43332S/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 0.75 0.0025 40032S/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 0.81 0.0015 65032S/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 0.67 0.0027 37132S/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 0.72 0.0022 46432S/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 0.78 0.0092 10932S/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 1.4 0.0021 46732S/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 0.6 0.0021 48132S/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 0.55 0.0027 37532S/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 0.7 0.0023 44032S/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 0.73 0.0027 36632S/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 NA 0.0027 36832S/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 0.89 0.0025 39332S/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 1.3 0.0027 36932S/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 9.34 0.0042 23932S/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 4.06 0.0038 26132S/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 16.6 0.0035 28932S/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 7.79 0.0034 29832S/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 7.15 0.0040 24732S/12E-24B01 5/12/2009 695 100 82.1 13.2 108 45288 150 NA NA NA 0.11 NA 0.660.29 288< 1.0 < 1.0 1,100 23.9 0.0029 34532S/12E-24B01 3/26/1996 1,870 773 380 24.0 125 95427 154 0.2 NA 0.27 NA NA NANANANANANA NA NA NA32S/12E-24B01 6/9/1976 1,706 667 400 16.2 94 95474 159 0.4 NA 0.12 0.5 NA NA NANA NANANANANANA32S/12E-24B01 1/17/1966 1,700 652 406 20.0 95 83440 175 1 NA 0.07 0.3 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 133~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 640 30 48 3.8 120 37320 160 ND 0.34 0.068 0.025 0.013 0.18 0.06 320NDND952 0.62 0.0020 49232S/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 0.69 0.0038 26432S/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 0.58 0.0032 31032S/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 0.56 0.0037 27332S/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 0.74 0.0032 31032S/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 0.93 0.0039 25832S/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 0.59 0.0035 28332S/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 0.79 0.0029 35132S/12E-24B02 10/11/2016 660 35 48 4 12039320 170 ND 0.26 0.069 0.038 0.0230.18 0.12 320NDND953 0.75 0.0034 29232S/12E-24B02 7/19/2016 660 36 50 3.9 120 38320 160 <0.096 0.15 0.07 0.036 0.016 0.17 0.15 320<4.1 <4.1 947 0.67 0.0042 24032S/12E-24B02 4/12/2016 640 35 48 3.8 110 37300 160 <0.096 0.38 0.064 0.0450.011 0.17 0.13 300<4.1 <4.1 939 0.53 0.0037 26932S/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 0.48 0.0039 25332S/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 0.72 NA NA32S/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 0.69 NA NA32S/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 0.45 NA NA32S/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 0.48 NA NA32S/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 0.44 NA NA32S/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 0.37 NA NA32S/12E-24B02 4/16/2014 630 32 43 4.3 88 28300 150 <0.05 <1 0.067 <0.1 <0.010.12 <0.1 300<10<10 940 0.32 NA NA32S/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 0.37 NA NA32S/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 0.39 NA NA32S/12E-24B02 7/9/2013 630 30 43 3.9 110 33295 170 <0.05 <1 0.076 <0.1 <0.010.14 <0.1 295<10<10 940 0.6 NA NA32S/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 0.41 NA NA32S/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 0.72 NA NA32S/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 0.56 NA NA32S/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 0.43 NA NA32S/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 0.26 NA NA32S/12E-24B02 1/11/2012 650 33 46 4.6 110 32300 150 <0.1 1.3 <0.1 0.21 <0.020.13 0.03 300<10<10 950 1.7 0.0010 97132S/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 0.32 NA NA32S/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 0.88 NA NA32S/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 NA NA NA32S/12E-24B02 1/24/2011 640 43 44 5.9 87 28270 170 <0.05 <1.0 0.11 <0.1 0.140.085 <0.1 270<2.0 <2.0 940 1.3 NA NA32S/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 0.63 NA NA32S/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 2.84 0.0036 28032S/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 6.66 0.0035 28832S/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 3.49 0.0036 28132S/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 1.14 0.0039 25832S/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 3.22 0.0041 24532S/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 6.76 0.0029 34232S/12E-24B02 3/26/1996 652 54 46 5 107 24344 169 0.2 NA 0.1 NA NA NA NANANANANA NA NA NA32S/12E-24B02 6/9/1976 565 34 52 4 104 27337 153 0.6 NA 0.02 0.5 NA NA NANANANANANANANA32S/12E-24B02 1/17/1966 651 62 79 5 101 32380 147 0 NA 0.05 0.3 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 134~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 690 48 52 4.1 110 45 320 160 ND 0.19 0.065 ND 0.020 0.011 0.10 320 ND ND 1,030 0.19 0.0020 50032S/12E-24B03 7/12/2018 650 47 51 3.8 110 42 320 150 ND 0.14 0.062 0.023 0.020 0.10 0.16 320 ND ND 1,040 0.18 0.0034 29432S/12E-24B03 4/11/2018 670 50 53 4.0 110 44 320 160 ND 0.11 0.065 0.017 0.019 0.011 0.19 320NDND 1,010 0.19 0.0038 26332S/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 0.19 0.0038 26732S/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 0.20 0.0039 25832S/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 0.19 0.0039 25632S/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 0.23 0.0044 22932S/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 0.27 0.0038 26132S/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 0.22 0.0035 28832S/12E-24B03 7/19/2016 690 47 54 4.1 110 46340 160 <0.096 0.32 0.063 0.0170.016 0.013 0.20 340<8.2 <8.2 1,010 0.32 0.0043 23532S/12E-24B03 4/12/2016 680 48 55 4.1 110 45320 160 <0.096 0.21 0.056 0.0190.018 0.012 0.17 320<8.2 <8.2 1,010 0.28 0.0035 28232S/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 0.27 0.0037 26832S/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 0.21 NA NA32S/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 0.20 NA NA32S/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 0.17 NA NA32S/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 0.17 NA NA32S/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 0.19 NA NA32S/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 0.19 NA NA32S/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 0.16 0.0026 39132S/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 0.17 NA NA32S/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 0.2 NA NA32S/12E-24B03 7/9/2013 660 46 47 3.9 110 41310 170 <0.05 <1 0.066 <0.1 <0.010.0100 <0.1 310<10<10 1,010 0.27 NA NA32S/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 0.19 NA NA32S/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 0.26 NA NA32S/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 0.22 NA NA32S/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 0.24 NA NA32S/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 0.23 NA NA32S/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 0.15 NA NA32S/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 0.12 NA NA32S/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 0.21 NA NA32S/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 NA NA 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 0.22 NA NA32S/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 0.55 NA NA32S/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 6.7 0.0036 27532S/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 9.71 0.0038 26532S/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 5.18 0.0031 32032S/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 0.343 0.0035 28632S/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 14.3 0.0032 31332S/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 5.9 0.0036 27532S/12E-24B03 3/26/1996 646 41 52 4.3 104 42412 164 0.2 NA 0.12 NA NA NA NANANANANANANANA32S/12E-24B03 6/9/1976 569 36 53 3.7 85 39330 165 0 NA 0.06 0.4 NA NA NANANANANA NA NA NA32S/12E-24B03 1/17/1966 670 79 74 5 103 36345 158 1 NA 0 0.2 NA NA NANANANANA NANA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 135~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 460 62 72 2.3 44 2184 120 13 0.09 0.09 0.034 ND ND 0.1684NDND696 ND 0.0026 38832S/13E-30F01 4/12/2018 470 58 69 2.3 44 2182 110 12 0.14 0.09 0.030 ND ND 0.2382NDND699 ND 0.0040 25232S/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 0.061 0.0041 24332S/13E-30F01 4/12/2017 510 61 65 2.1 42 2085 120 13 0.12 0.074 0.062 ND ND 0.2885NDND682 0.045 0.0046 21832S/13E-30F01 10/11/2016 480 62 72 2.3 46 2391 120 12 0.13 0.09 0.046 ND ND 0.3291NDND702 ND 0.0052 19432S/13E-30F01 4/13/2016 460 60 70 2.3 43 2190 120 52 0.2 0.086 0.054 <0.01 <.0040 0.3090<4.1 <4.1 696 <0.030 0.0050 20032S/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 <0.05 0.0031 32232S/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 <0.05 0.0032 31732S/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 <0.05 0.0018 56232S/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 <0.05 0.0030 33732S/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 <0.05 0.0011 88132S/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 <0.05 0.0014 71832S/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 <0.05 0.0024 42132S/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 <0.05 0.0022 45932S/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 <0.05 NA NA32S/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 <0.05 0.0033 30032S/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 0.05 0.0017 59132S/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 <0.05 0.0022 46232S/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 <0.05 0.0015 66432S/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 <0.1 NA NA32S/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 <0.1 NA NA32S/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 <0.1 0.0023 43832S/13E-30F01 7/25/2011 460 66 68 4.4037 1978 117.4 12.17 <1 0.100 0.101 <0.01 0.014 0.178 78<5<5720 0.11 0.0027 37032S/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 NA 0.0024 41832S/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 <0.1 NA NA32S/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 <.1 NA NA32S/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 0.79 0.0050 20032S/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 1.02 0.0040 24832S/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 0.640 0.0040 25032S/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 1.30 0.0043 23132S/13E-30F01 8/19/2009 648 92 98.9 3.84 63.1 31.9 113 190 10 0.56 NA < 0.100.12 1.03 0.32 113< 1.0 < 1.0 970 4.52 0.0035 28832S/13E-30F01 5/12/2009 792 110 108 2.89 80.2 39.9 136 280 NA NA NA < 0.10 NA0.0353 0.39 136< 1.0 < 1.0 1,200 0.281 0.0035 282P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 136~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 580 51 50 2.9 83 35190 130 14 0.07 0.094 0.07 ND 0.020 0.42 190NDND848 0.07 0.0082 12132S/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 0.045 0.0111 9032S/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 ND 0.0100 10032S/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 ND 0.0131 7632S/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 0.037 0.0127 7832S/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 ND 0.0127 7932S/13E-30F02 4/12/2017 620 52 51 2.9 88 38200 130 13 ND 0.088 0.063 ND 0.022 0.67 200NDND8560.0410.0129 7832S/13E-30F021/10/2017 590 52 50 2.8 90 37220 140 13 ND 0.09 0.08 ND 1.1 0.6220NDND884 0.150.0115 8732S/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 ND 0.0115 8732S/13E-30F02 7/20/2016 590 51 51 3.0 88 38220 130 58 0.14 0.091 0.072 <0.010 0.170 0.57 220<4.1 <4.1 880 0.033 0.0112 8932S/13E-30F02 4/13/2016 570 51 51 2.9 89 40200 130 58 0.08 0.1 0.086 <0.010 0.014 0.60 200<4.1 <4.1 876 <0.030 0.0118 8532S/13E-30F02 1/13/2016 610 53 51 2.9 89 38210 140 13 0.14 0.091 0.15 <0.0100.035 0.47 210<4.1 <4.1 858 <0.030 0.0089 11332S/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 0.078 0.0080 12632S/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 <0.05 0.0060 16732S/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 <0.05 0.0082 12132S/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 <0.05 0.0064 15732S/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 <0.05 0.0080 12432S/13E-30F02 7/30/2014 580 49 46 2.6 80 35210 130 13 <1 <0.1 <0.1 <0.01 0.020.27 210<10<10 890 <0.05 0.0055 18132S/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 <0.05 0.0090 11132S/13E-30F02 1/15/2014 580 50 45 2.7 76 31190 136 13.1 13.4 <0.1 <0.1 <0.010.054 0.4190<10<10 890 <0.05 0.0080 12532S/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 <0.05 0.0076 13232S/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 <0.05 NA NA32S/13E-30F02 4/11/2013 590 50 41 2.6 70 30190 140 14 <1 0.09 0.1 <0.01 0.0820.43 190<10<10 880 <0.05 0.0086 11632S/13E-30F02 1/15/2013 550 50 44 2.9 72 31200 140 13 <1 0.09 0.1 <0.01 0.0110.32 200<10<10 880 0.12 0.0064 15632S/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 0.011 0.0065 15532S/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 <0.05 0.0048 20732S/13E-30F02 4/19/2012 600 60 40 2.7 68 30200 140 14 <1 <0.1 <0.2 <0.01 0.190.3200<10<10 890 0.11 0.0050 20032S/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 <0.1 0.0063 15832S/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 <0.1 0.0069 14432S/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 <0.1 0.0074 13532S/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 NA 0.0070 14232S/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 <0.1 0.0059 17032S/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 <0.1 NA NA32S/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 < 0.100 0.0120 8332S/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 3.28 0.0100 10032S/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 4.55 0.0109 9232S/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 2.15 0.0104 9632S/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 19.4 0.0110 9132S/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 3.23 0.0098 10232S/13E-30F02 3/27/1996 678 49 52 3.8 98 42305 166 49 NA 0.16 NA NA NA NANANANANANANANA32S/13E-30F02 6/9/1976 637 48 55 2.8 98 43343 172 17.6 NA 0.1 0.5 NA NA NANANANANA NA NA NA32S/13E-30F02 1/20/1966 580 68 47 2 94 38280 152 27 NA 0.08 0.2 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 137~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 650 48 44 2.9 120 51 310 170 ND 0.12 0.067 0.10 0.036 0.022 0.16 310NDND981 0.05 0.0033 30032S/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 ND 0.0045 22332S/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 0.035 0.0036 28132S/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 0.037 0.0054 18532S/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 0.056 0.0043 23532S/13E-30F03 7/12/2017 750 46 44 3 120 53280 170 ND ND 0.064 0.14 0.035 0.023 0.2280NDND980 0.046 0.0043 23032S/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 310NDND9720.0650.0046 21832S/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 0.14 0.0063 15832S/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 ND 0.0046 21832S/13E-30F03 7/20/2016 660 47 44 2.9 110 51320 170 <0.096 <0.080 0.062 0.12 0.032 0.023 0.20 320<4.1 <4.1 992 0.04 0.0043 23532S/13E-30F03 4/13/2016 650 47 42 2.7 110 51310 170 <0.096 0.2 0.072 0.13 0.028 0.021 0.22 310<4.1 <4.1 981 0.03 0.0047 21432S/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 0.054 0.0043 23332S/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 <0.05 0.0023 44032S/13E-30F03 7/15/2015 670 45 45 1.9 120 51305 170 <0.05 <1 0.060 0.11 0.030.019 <0.1 305<10<10 990 <0.05 NA NA32S/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 <0.05 NA NA32S/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 0.01 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 0.0025 40032S/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 <0.05 0.0027 37532S/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 <0.05 NA NA32S/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 <0.05 0.0046 21732S/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 <0.05 0.0027 37532S/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 <0.05 NA NA32S/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 0.02 NA NA32S/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 <0.05 0.0039 25532S/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 <0.1 NA NA32S/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 <0.1 NA NA32S/13E-30F03 11/21/2011 650 43 33 2.6 93 39290 160 <0.05 <1 0.04 0.15 0.0280.016 <0.1 290<10<10 960 <0.1 NA NA32S/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 <0.1 NA NA32S/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 NA 0.0023 43632S/13E-30F03 1/24/2011 650 46 36 4.7 87 38300 170 <0.05 <1.0 0.11 0.17 0.240.016 <0.1 300<2.0 <2.0 990 <0.1 NA NA32S/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 0.53 NA NA32S/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 7.55 0.0053 18832S/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 2.62 0.0048 20932S/13E-30F03 1/28/2010 656 40 43.1 3.91 112 47.2 310 180 < 0.20 2.8 0.08330.13 < 0.10 0.287 0.21 310< 1.0 < 1.0 980 4.80 0.0053 19032S/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 2.09 0.0035 28232S/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 18.5 0.0042 23732S/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 1.16 0.0037 27232S/13E-30F03 3/27/1996 686 41 40 3.4 109 48379 197 0.2 NA 0.13 NA NA NA NANANANANANANANA32S/13E-30F03 6/7/1976 616 43 41 2.6 96 49333 190 0.4 NA 0.05 0.5 NA NA NANANANANA NA NA NA32S/13E-30F03 1/19/1966 642 69 49 4 109 40321 182 1 NA 0.05 0.3 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 138~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 920 200 130 36 96 73370 140 ND 0.62 0.21 0.36 0.0170.14 0.85 370NDND 1,500 3.0 0.0043 23532S/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 2.4 0.0079 12732S/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 3 0.0100 10032S/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 3.9 0.0058 17332S/13E-30N01 10/12/2016 900 180 130 32 77 61290 180 ND 0.53 0.19 0.34 0.0210.11 1.7290NDND 1420 2.7 0.0094 10632S/13E-30N01 4/12/2016 790 110 110 27 55 46230 190 0.21 0.5 0.18 0.42 0.0130.1 1.7230<8.2 <8.2 1,190 1.7 0.0155 6532S/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 1.8 0.0108 9232S/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 2.5 0.0063 15832S/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 2.3 0.0071 14032S/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 2.5 0.0086 11732S/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 2.4 0.0073 13632S/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 2.4 0.0081 12332S/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 2.5 0.0091 11032S/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 2.8 0.0065 15432S/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 2.3 0.0048 20832S/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 2.5 0.0067 15032S/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 2.5 0.0071 14232S/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 2.8 0.0067 15032S/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 2.3 0.0063 15832S/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 2.4 0.0046 21532S/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 2.9 0.0073 13732S/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 3.4 0.0069 14432S/13E-30N01 7/25/2011 1,680 445 230 4299 81380 255.5 <0.05 1.2 0.21 <0.1 <0.01 0.12 3.016 380<5<5 2,480 4.2 0.0068 14832S/13E-30N01 4/20/2011 890 210 130 26 68 46180 215 <0.05 <1 0.24 0.39 0.0130.086 4.57 180<2.0 <2.0 1,550 NA 0.0218 4632S/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 18 0.0202 5032S/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 <0.1 0.0121 8332S/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 2.61 0.0140 7132S/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 20.4 0.0173 5832S/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 27.3 0.0152 6632S/13E-30N01 10/20/2009 828 200 159 34.3 118 59.8 238 230 < 0.10 1.3 0.2410.38 < 0.10 0.157 3.2238< 1.0 < 1.0 1,300 5.33 0.0160 6332S/13E-30N01 8/20/2009 835 160 150 27.8 121 49.4 235 220 < 0.10 1.3 NA 0.370.12 0.228 2.9235< 1.0 < 1.0 1,400 15.9 0.0181 5532S/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 2.26 0.0178 56P:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 139~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 540 68 59 3.4 71 32150 130 16 ND 0.091 0.21 ND 0.012 0.53 150NDND847 0.030 0.0078 12832S/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 0.076 0.0098 10232S/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 ND 0.0082 12232S/13E-30N03 1/11/2018 580 64 61 3.3 74 34150 140 14 0.20 0.088 0.19 ND 0.330.61 150NDND836 0.12 0.0095 10532S/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 0.59 0.0102 9832S/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 0.18 0.0103 9732S/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 0.43 0.0100 10032S/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 1.5 0.0107 9332S/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 0.17 0.0112 8932S/13E-30N03 7/19/2016 580 66 61 3.6 75 36160 130 65 0.20 0.084 0.16 <0.0100.030 0.76 160<4.1 <4.1 864 <0.030 0.0115 8732S/13E-30N03 4/12/2016 610 69 60 3.4 75 36160 130 64 0.16 0.078 0.18 <0.0100.0095 0.78 160<4.1 <4.1 895 <0.05 0.0113 8832S/13E-30N03 1/13/2016 570 72 62 3.4 77 35160 140 15 0.15 0.083 0.22 <0.0100.0089 0.66 160<4.1 <4.1 867 0.079 0.0092 10932S/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 <0.05 0.0089 11332S/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 <0.05 0.0071 14132S/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 <0.05 0.0072 13832S/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 0.49 0.0063 15832S/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 <0.05 0.0077 13132S/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 <0.05 0.0052 19132S/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 <0.05 0.0060 16632S/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 0.27 0.0070 14332S/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 0.1 0.0068 14632S/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 0.43 0.0028 35332S/13E-30N03 4/10/2013 600 66 53 3.3 69 31160 150 15 <1 0.11 0.2 <0.01 0.0640.35 160<10<10 910 <0.05 0.0053 18932S/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 0.084 0.0041 24432S/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 0.04 0.0050 20032S/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 0.44 0.0042 23732S/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 <0.1 0.0035 28632S/13E-30N03 1/11/2012 570 67 55 3.9 68 30140 130 14 <1 0.1 0.2 <0.02 0.05100.39 140<10<10 870 0.17 0.0058 17232S/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 <0.1 0.0093 10832S/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 0.14 0.0118 8532S/13E-30N03 4/20/2011 580 76 58 4.2 62 23140 142 16 <1 0.12 0.2 <0.1 0.05100.92 140<2.0 <2.0 890 NA 0.0121 8332S/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 <0.1 0.0224 4532S/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 <0.1 0.0159 6332S/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 < 0.100 0.0181 5532S/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 < 0.100 0.0135 7432S/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 0.653 0.0118 8532S/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 0.344 0.0078 12932S/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 1.93 0.0084 11932S/13E-30N03 5/12/2009 602 97 63.4 3.96 72.9 32.2 122 120 NA NA NA 0.22 NA 241.2122< 1.0 < 1.0 900 2.24 0.0124 8132S/13E-30N03 3/27/1996 624 70 62 4 78 35150 161 106.8 NA 0.13 NA NA NA NANANANANA NA NA NA32S/13E-30N03 6/7/1976 705 90 54 2.9 99 43189 168 112.5 NA 0.08 0.5 NA NA NANANANANA NA NA NA32S/13E-30N03 1/21/1966 804 57 54 3 132 59410 250 1 NA 0.08 0.5 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 140~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 940 50 75 4.9 150 64 190 500 0.18 0.16 0.16 0.069 NDND 0.09 190 ND ND 1,340 0.22 0.0017 58132S/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 0.17 0.0026 39232S/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 0.41 0.0030 32932S/13E-30N02 1/11/2018 980 49 77 4.6 150 63190 510 0.19 0.10 0.15 0.13 ND ND0.16 190NDND 1,330 0.2 0.0033 30632S/13E-30N02 10/11/2017 1000 46 70 4.8 160 65200 510 0.19 0.19 0.17 0.11 ND0.005 0.27 200NDND 1340 0.28 0.0059 17032S/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 2.0 0.0033 30632S/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 0.2 0.0036 27832S/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 0.63 0.0033 30632S/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 ND 0.0054 18532S/13E-30N02 7/19/2016 1,000 48 78 5 160 68200 500 0.97 0.17 0.15 0.11 <0.010 <0.0040 0.2200<8.2 <8.2 1,350 <0.030 0.0042 24032S/13E-30N02 4/12/2016 1,000 44 72 4.8 150 67190 470 1.0 <0.080 0.14 0.096<0.010 <0.0040 0.21 190<8.2 <8.2 1,390 <0.030 0.0048 21032S/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 0.041 NA NA32S/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 <0.05 NA NA32S/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 <0.05 0.0022 44532S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 0.07 NA NA32S/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 <0.05 NA NA32S/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 <0.05 NA NA32S/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 <0.1 0.0047 21432S/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 <0.1 NA NA32S/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 <0.1 NA NA32S/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 0.49 NA NA32S/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 NA NA 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 0.12 NA NA32S/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 <0.1 NA NA32S/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 3.43 0.0049 20432S/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 3.27 0.0075 13332S/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 3.30 0.0033 30032S/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 1.69 0.0032 30832S/13E-30N02 1/26/2010 970 50 74.2 4.77 152 62.2 195 510 0.14 < 0.50 0.1290.11 < 0.10 < 0.00500 0.16 195< 1.0 < 1.0 1,300 < 0.100 0.0032 31332S/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 5.50 0.0029 34532S/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 4.91 0.0056 17932S/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 5.24 0.0033 30432S/13E-30N02 3/27/1996 1,050 50 71 5.5 145 60243 516 0.9 NA 0.23 NA NA NA NANANANANANANANA32S/13E-30N02 6/7/1976 1,093 48 62 4.7 150 60248 484 0 NA 0.13 0.7 NA NA NANANANANANANANA32S/13E-30N02 1/21/1966 1,069 54 71 5 148 63232 483 0 NA 0.12 0.5 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 141~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 590 33 45 5.3 88 54330 120 ND 0.20 0.075 0.11 0.011 0.16 0.08 330NDND916 6.5 0.0023 42932S/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 3.8 0.0047 21332S/13E-31H10 4/10/2018 690 41 51 3.5 120 55310 200 ND 0.16 0.089 0.19 0.0160.21 0.15 310NDND 1,020 4.7 0.0037 27332S/13E-31H10 1/10/2018 660 35 44 3.3 110 56350 170 ND 0.23 0.075 0.20 0.0160.2 0.17 350NDND 1,020 5.3 0.0049 20632S/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 4.3 0.0039 25432S/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 4.7 0.0036 27732S/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 5.2 0.0056 17732S/13E-31H10 1/13/2017 670 34 45 3.4 130 60370 180 ND 0.16 0.076 0.17 0.0140.22 0.1370NDND 1,020 7.8 0.0029 34032S/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 5.3 0.0036 27532S/13E-31H10 7/20/2016 630 33 42 4.4 99 57370 150 <0.096 0.3 0.068 0.14 <0.01 0.19 0.14 370<8.2 <8.2 991 8.9 0.0042 23632S/13E-31H10 4/13/2016 670 37 46 3.4 120 57350 180 <0.096 0.21 0.078 0.19 0.011 0.23 0.14 350<8.2 <8.2 1,030 6.7 0.0038 26432S/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 2.2 0.0051 19532S/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 1.4 NA NA32S/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 0.98 NA NA32S/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 4.6 NA NA32S/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 4.2 NA NA32S/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 6.5 NA NA32S/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 6.5 NA NA32S/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 4.9 0.0024 42332S/13E-31H10 1/16/2014 900 57 66 4.60 110 50240 360 <0.05 <1 0.180 0.2 0.020.32 <0.1 240<10<10 1,260 6.0 NA NA32S/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 7.4 NA NA32S/13E-31H10 7/11/2013 860 60 50 4.40 110 47240 340 <0.05 <1 0.18 0.15 0.020.28 <0.1 240<10<10 1,230 4.9 NA NA32S/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 5.7 NA NA32S/13E-31H10 1/16/2013 820 66 76 5.00 100 47260 320 <0.1 <1 0.21 0.13 <0.010.31 <0.2 260<10<10 1,230 4.2 NA NA32S/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 4 NA NA32S/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 6.7 NA NA32S/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 4 NA NA32S/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 4.8 NA NA32S/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 4.8 NA NA32S/13E-31H10 7/25/2011 760 69 66 6.4080 35310 208.8 <0.05 <1 0.16 0.17 0.041 0.23 0.199 310<5<5 1,170 5.3 0.0029 34832S/13E-31H10 1/24/2011 310 98 22 8.1 34 9.2 19.0 53 <0.05 <1.0 <0.1 0.2 4.420.4 0.63 19.0<2.0 <2.0 480 10 0.0064 15632S/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 38 0.0044 22532S/13E-31H10 7/26/2010 438 85 34.3 1.9361.7 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 36 0.0038 26632S/13E-31H10 4/26/2010 560 83 47.7 5.786.1 48.362 310 < 0.10 0.84 < 0.02< 0.1 0.56 2.54 0.31 62.0< 1.0 < 1.0 880 233 0.0037 26832S/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 4,360 0.0038 26532S/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 11.4 0.0042 23632S/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 < 1.0 690 242 0.0043 23532S/13E-31H10 5/16/1983 665 35 40 NA 85 65360 90 < 4 NA NA 0.2 NA 0.01 NA360NDND950 0.10 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 142~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 720 37 49 3.8 130 59 340 210 ND 0.24 0.091 0.15 0.0150.23 0.08 340 ND ND 1,090 8.2 0.0021 48132S/13E-31H11 7/12/2018 720 36 43 3.6 120 54 340 190 ND 0.27 0.082 0.17 0.0140.25 0.15 340 ND ND 1,110 7.2 0.0042 24032S/13E-31H11 4/10/2018 780 73 81 3.8 110 47 300 210 ND 0.090 0.17 0.18 0.0660.24 0.40 300 ND ND 1,130 7.3 0.0055 18332S/13E-31H11 1/10/2018 750 39 51 3.7 130 57 340 220 ND 0.17 0.089 0.20 0.0210.28 0.16 340 ND ND 1,090 5.9 0.0041 24432S/13E-31H11 10/11/2017 720 38 45 3.7 120 56 350 200 ND 0.22 0.13 0.18 0.0150.22 0.14 350 ND ND 1080 5.6 0.0037 27132S/13E-31H11 7/11/2017 820 43 53 3.9 130 58 320 230 ND 0.11 0.11 0.13 0.018 0.29 0.19 320NDND 1,100 9.7 0.0044 22632S/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 6.3 0.0040 25032S/13E-31H11 1/13/2017 750 44 57 4 13058340 240 ND 0.11 0.11 0.13 0.024 0.29 0.15 340NDND 1,100 7.20 0.0034 29332S/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 8.10 0.0039 25632S/13E-31H11 7/20/2016 420 120 64 6.8 4.3 3860 39 <0.096 0.097 0.12 0.059 0.084 0.084 0.598929<4.1 617 9.0 0.0049 20332S/13E-31H11 4/13/2016 410 110 64 604 3.9 4051 56 <0.096 <0.080 0.11 0.0580.084 0.053 0.589241<4.1 628 6.7 0.0053 19032S/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 8.6 0.0063 15832S/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 5.7 0.0040 25032S/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 9.6 0.0034 29332S/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 6.6 0.0040 24932S/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 3.5 0.0031 32532S/13E-31H11 10/16/2014 370 120 78 13.0 4.2 2953 77 <0.05 <1 0.17 <0.1 0.110.040 0.3588<10<10 740 4.5 0.0029 34332S/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 8 0.0024 41432S/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 3.7 0.0036 27932S/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 2.3 0.0039 25432S/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 4.1 0.0038 26332S/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 3.2 0.0031 31832S/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 3.2 0.0033 30032S/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 3.7 0.0037 26832S/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 6.1 0.0021 48532S/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 6.6 NA NA32S/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 1.6 0.0068 14732S/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 0.2 0.0032 31432S/13E-31H11 11/21/2011 390 90 78 4.6 5.2 24111 86 <0.05 <1 0.19 0.13 0.0920.014 0.28 12817<10 720 0.5 0.0031 32132S/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 2.7 NA NA32S/13E-31H11 4/21/2011 580 118 70 19 49 178.8 274 <0.05 <1 <0.1 0.29 0.109 0.091 0.411.32.5<2.0 950 NA 0.0034 29532S/13E-31H11 1/24/2011 680 110 60 17 64 225.0 330 <0.05 <1.0 <0.1 0.22 0.960.16 0.31 11.26.2<2.0 1,040 10.0 0.0028 35532S/13E-31H11 10/21/2010 770 100 68 12 88 3114.0 380 <0.1 <1.0 <0.1 0.28 NA 0.054 <0.3 14.0<10<10 1,163 2.2 NA NA32S/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 1,200 593 0.0059 16932S/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 1,600 383 0.0061 16532S/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 2,300 170 0.0047 21532S/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 3,100 236 0.0045 22232S/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 < 1.0 640 153 0.0049 20332S/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 0.10 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 143~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 NA 0.0043 23132S/13E-31H12 1/24/2011 440 92 90 9.2 3.4 2790 140 <0.05 <1.0 0.25 0.11 0.940.041 0.35 11020<2.0 810 2.2 0.0038 26332S/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 3.5 0.0042 23732S/13E-31H12 7/26/2010 478 83 109 5.9452.9 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 61.0 0.0067 14832S/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 0.486.014.0 < 1.0 810 71.0 0.0048 20832S/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 54.4 0.0041 24532S/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 20.0 0.0045 22232S/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 1,000 278 0.0042 23732S/13E-31H12 5/16/1983 630 40 40 NA 90 50330 80 < 4 NA NA 0.1 NA 0.02 NA330NDND900 0.05 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 144~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 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 0.042 0.0022 44732S/13E-31H09 7/10/2018 630 46 47 2.6 120 53360 170 ND 0.11 0.073 0.13 0.0180.032 0.17 360NDND 1,100 0.041 0.0037 27132S/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 0.10 0.0039 25932S/13E-31H09 1/10/2018 680 40 46 2.6 120 53360 160 ND 0.14 0.062 0.16 0.0190.048 0.14 360NDND 1,040 0.38 0.0035 28632S/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 0.34 0.0033 30832S/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 0.42 0.0038 26732S/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 0.30 0.0033 30032S/13E-31H091/11/2017 640 61 53 3 100 48320 150 ND ND 0.071 0.16 0.02 0.05 0.24 320NDND976 0.40 0.0039 25432S/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 0.36 0.0039 25632S/13E-31H09 7/20/2016 680 45 50 2.9 120 56370 160 0.18 0.14 0.075 0.15 0.013 0.049 0.16 370<8.2 <8.2 1,060 0.33 0.0036 28132S/13E-31H09 4/13/2016 670 43 48 2.9 110 57350 160 <0.096 0.2 0.062 0.14 0.012 0.056 0.18 350<8.2 <8.2 1,040 0.46 0.0042 23932S/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 0.46 0.0075 13332S/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 0.18 NA NA32S/13E-31H09 7/15/2015 680 43 52 2.4 120 56360 170 <0.05 <1 0.079 0.11 0.010.033 <0.1 360<10<10 1,070 0.13 NA NA32S/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 0.47 NA NA32S/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 0.064 NA NA32S/13E-31H09 7/30/2014 670 43 43 2.2 110 48360 160 <0.05 <1 <0.1 0.15 <0.010.029 <0.1 360<10<10 1,070 0.057 NA NA32S/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 0.05 NA NA32S/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 0.18 NA NA32S/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 0.11 NA NA32S/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 0.11 NA NA32S/13E-31H09 4/11/2013 720 43 40 2.7 98 46350 170 <0.05 <1 0.072 0.14 <0.010.029 <0.1 350<10<10 1,070 0.12 NA NA32S/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 0.130 NA NA32S/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 0.086 NA NA32S/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 0.660 NA NA32S/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 0.200 NA NA32S/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 0.100 NA NA32S/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 0.0 NA NA32S/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 <0.1 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 145~SI Water Solutions. Inc.
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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 400 84 79 4.2 4.9 43190 13 ND 0.052 0.16 0.043 0.0450.083 0.18 22023ND678 2.1 0.0021 46732S/13E-31H13 7/12/2018 470 81 72 3.9 3.9 38190 13 ND 0.096 0.14 0.041 0.0450.064 0.31 22025ND699 0.86 0.0038 26132S/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 4.2 0.0037 27332S/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 2.5 0.0033 30032S/13E-31H13 10/11/2017 390 77 70 3.7 4.9 38190 15 ND 0.11 0.16 0.034 0.0390.079 0.28 22029ND648 1.1 0.0036 27532S/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 2.2 0.0037 27132S/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 4.5 0.0035 28232S/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 3.3 0.0038 26132S/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 2.3 0.0036 27632S/13E-31H13 7/20/2016 510 91 99 5.1 2.4 34170 19 <0.096 <0.080 0.22 0.043 0.054 0.038 0.43 21044<4.1 694 1.2 0.0047 21232S/13E-31H13 4/13/2016 450 94 99 4.6 2.5 33150 25 <0.096 <0.080 0.22 0.054 0.045 0.035 0.44 20051<4.1 701 1.2 0.0047 21432S/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 0.33 0.0054 18732S/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 0.30 0.0031 32732S/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 0.24 0.0027 37532S/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 0.42 0.0030 33532S/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 0.47 0.0026 38332S/13E-31H13 10/16/2014 370 80 84 5.0 3.2 32146 59 <0.05 <1 0.19 <0.1 0.0550.044 0.18 17024<10 720 0.61 0.0023 44432S/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 0.25 0.0020 50632S/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 0.45 0.0036 28032S/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 0.30 0.0038 26232S/13E-31H13 10/16/2013 410 84 87 4.7 5.3 33114 130 <0.05 <1 0.17 <0.1 0.080.053 0.312410<10 760 0.28 0.0036 28032S/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 0.19 0.0026 38132S/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 0.15 0.0026 38532S/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 0.55 NA NA32S/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 0.33 0.0034 29332S/13E-31H13 7/25/2012 390 108 107 5.5 2.7 2913 66 <0.05 <1 0.28 <0.1 0.0790.0037 0.23 168155<10 750 0.84 0.0021 47032S/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 0.24 0.0035 28232S/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 0.89 0.0033 30332S/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 0.65 0.0032 31332S/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 1.90 0.0033 30232S/13E-31H13 4/21/2011 380 88 110 6.3 4.0 27140 101 <0.05 <1 0.41 0.14 0.070.13 0.33 140<2.0 <2.0 750 N/A 0.0038 26732S/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 0.49 0.0034 29632S/13E-31H13 10/21/2010 410 87 100 3.9 6.0 33148 100 <0.1 <1.0 0.14 <0.1 NA0.087 <0.3 148<10<10 796 0.66 NA NA32S/13E-31H13 7/26/2010 446 94 93.0 8.8110.2 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 22.4 0.0051 19632S/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 56.2 0.0046 21832S/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 23.6 0.0043 23432S/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 18.9 0.0042 23832S/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 < 1.0 790 682 0.0038 26732S/13E-31H13 5/16/1983 770 60 70 NA 90 70330 120 9 NA NA 0.1 NA 0.02 NA330NDND 1,100 0.24 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 146~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 850 38 67 3.5 140 49180 430 0.43 0.16 0.16 0.03 ND ND ND180NDND 1,190 0.19 NA NA12N/36W-36L01 7/10/2018 960 39 64 3.4 130 47180 430 0.50 0.11 0.17 0.12 ND ND0.063 180NDND 1,230 ND 0.0016 61912N/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 ND 0.0026 39012N/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 ND 0.0026 39212N/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 0.23 NA NA12N/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 0.23 NA NA12N/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 0.43 0.0017 59712N/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 0.11 0.0018 54312N/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 0.037 0.0034 29212N/36W-36L01 7/19/2016 920 37 69 3.6 130 50180 430 1.9 0.25 0.15 0.043 <0.010 <0.0040 0.10 180<8.2 <8.2 1,200 <0.030 0.0027 37012N/36W-36L01 4/12/2016 860 38 65 3.5 130 49180 390 2.0 <0.080 0.16 0.036 <0.010 <0.0040 0.12 180<8.2 <8.2 1,210 <0.05 0.0032 31712N/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 0.070 0.0028 36012N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 <0.05 NA NA12N/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 0.18 NA NA12N/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 <0.05 NA NA12N/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 0.13 NA NA12N/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 <0.05 NA NA12N/36W-36L01 7/24/2012 880 43 65 3.9 110 41168 420 <0.05 <1 0.16 <0.1 <0.010.02 <0.1 168<10<10 1,190 0.19 NA NA12N/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 <0.1 NA NA12N/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 <0.1 NA NA12N/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 <0.1 NA NA12N/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 0.024 NA NA12N/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 NA NA 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 <0.1 NA NA12N/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 <0.1 NA NA12N/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 < 0.100 0.0031 32712N/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 4.53 0.0033 30012N/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 1.68 0.0034 29212N/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 2.03 0.0036 27912N/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 4.02 0.0035 28612N/36W-36L01 3/26/1996 882 35 66 4.8 124 47233 408 2 NA 0.24 NA NA NA NANANANANANANANA12N/36W-36L01 6/8/1976 936 38 72 3.5 130 48223 423 0.6 NA 0.15 0.7 NA NA NANANANANANANANAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 147~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/10/2018 840 99 110 7.2 100 46260 240 ND 2 0.33 0.06 0.13 0.19 0.40 260NDND 1,200 5.2 0.0040 24812N/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 0.9 0.0062 16112N/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 2.1 0.0066 15212N/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 0.51 0.0065 15412N/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 0.41 0.0066 15212N/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 0.75 0.0061 16412N/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 0.77 0.0053 19012N/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 1.1 0.0056 17712N/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 0.1 0.0059 17112N/36W-36L02 7/19/2016 820 97 110 6.2 95 45270 240 <0.096 2 0.33 0.081 0.1 0.15 0.65 270<8.2 <0.82 1,220 0.14 0.0067 14912N/36W-36L02 4/12/2016 800 96 100 6 94 44270 230 <0.096 1.8 0.32 0.12 0.12 0.14 0.81 270<8.2 <0.82 1,240 0.37 0.0084 11912N/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 1.9 0.0068 14812N/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 0.32 0.0042 24112N/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 0.16 0.0061 16412N/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 0.40 0.0039 25812N/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 0.077 0.0032 31112N/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 0.12 0.0041 24612N/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 0.27 0.0019 51612N/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 0.22 0.0037 27112N/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 0.41 0.0044 22712N/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 0.54 0.0036 28112N/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 0.31 0.0010 95512N/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 0.60 0.0045 22212N/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 0.61 0.0018 55012N/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 0.30 0.0034 29412N/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 0.52 0.0023 43212N/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 0.77 NA NA12N/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 1.80 0.0037 27112N/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 0.40 0.0035 28912N/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 2.30 0.0040 25212N/36W-36L02 4/21/2011 770 120 90 5.3 86 26280 206 <0.05 2.3 0.24 0.26 0.140.004 0.57 280<2.0 <2.0 1,270 NA 0.0048 21112N/36W-36L02 1/24/2011 800 120 95 7.6 75 30300 190 <0.05 2.3 0.39 0.16 1.310.13 0.53 300<2.0 <2.0 1,270 1.40 0.0044 22612N/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 0.12 0.0045 22212N/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 0.845 0.0073 13812N/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 3.870 0.0070 14312N/36W-36L02 10/21/2009 638 99 113 6.1581.6 23.0 172 200 < 0.10 3.2 0.268 0.33 57 0.128 0.61 172< 1.0 < 1.0 940 0.255 0.0062 16212N/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 0.830 0.0075 13312N/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 0.958 0.0065 15412N/36W-36L02 3/26/1996 772 127 130 8.7 86 36390 148 0.2 NA 0.5 NA NA NA NANANANANANANANA12N/36W-36L02 6/8/1976 820 126 118 6.6 94 44393 184 0 NA NA 0.5 NA NA NANANANANA NA NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 148~SI Water Solutions. 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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 ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/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 10/9/2018 280 62 64 2.8 14 6.250 28 8.4 0.07 0.093 0.031 ND ND 0.1350NDND446 0.087 0.0021 47712N/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 0.047 0.0028 35612N/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 0.26 0.0035 28712N/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 0.21 0.0032 31012N/35W-32C03 10/11/2017 320 64 63 2.8 14 6.553 28 8.4 0.11 0.11 0.04 ND 0.010.1753NDND445 0.6 0.0027 37612N/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 0.3 0.0033 30012N/35W-32C03 4/11/2017 300 65 66 2.8 14 6.652 28 8 ND 0.082 0.038 ND ND 0.1952NDND442 0.077 0.0029 34212N/35W-32C03 1/13/2017 300 67 72 3 16 7.153 29 8.2 ND 0.093 0.033 ND ND 0.2153NDND449 0.072 0.0031 31912N/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 ND 0.0028 35612N/35W-32C03 7/20/2016 300 66 65 2.8 13 6.457 26 35 <0.08 0.087 0.03 <0.010<0.0040 0.1657<4.1 <4.1 450 0.039 0.0024 41312N/35W-32C03 4/13/2016 290 65 66 2.8 14 6.551 26 36 0.086 0.083 0.039 <0.010 <0.0040 0.2251<4.1 <4.1 438 0.08 0.0034 29512N/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 0.079 0.0023 43112N/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 0.33 NA NA12N/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 0.22 NA NA12N/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 0.11 0.0018 56412N/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 0.38 0.0016 63012N/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 0.35 NA NA12N/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 0.16 NA NA12N/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 0.21 0.0019 51812N/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 0.47 0.0019 51712N/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 0.21 0.0017 58012N/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 0.17 NA NA12N/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 0.49 0.0017 58012N/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 0.23 NA NA12N/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 1.9 NA NA12N/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 0.49 NA NA12N/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 1.3 NA NAP:\Portland\672‐Northern Cities Management Area\005‐2018 Annual Report\Water Quality\NCMA_WQ_SentryWells.xlsx1/15/2019Item 11.a. - Page 149~SI Water Solutions. Inc.
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