CC 2014-06-10_11.a. Water Supply Strategies
MEMORANDUM
TO: CITY COUNCIL
FROM: TERESA MCCLISH, COMMUNITY DEVELOPMENT DIRECTOR
GEOFF ENGLISH, PUBLIC WORKS DIRECTOR
SUBJECT: CONSIDERATION OF WATER SUPPLY STRATEGIES AND
AMENDMENTS TO CONSULTANT SERVICES AGREEMENTS FOR
TECHNICAL SUPPORT SERVICES FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
DATE: JUNE 10, 2014
RECOMMENDATION:
It is recommended that the City Council:
1. approve staff’s recommended water conservation strategies; and
a. increase of the turf removal incentive from 50 cents to $1.00 per square foot;
and
b. approve the increase for the water efficient washing machine incentive from
$150 to $200;
2. approve the Northern Cities Management Area Technical Group (NCMA TG)
Annual Report Work Plan and Strategic Plan; and
c. authorize the Mayor to execute an Amendment No. 1 to the Agreement for
Consultant Services with Fugro Consulting Inc. (“Fugro”) in the amount of
$43,400 for the NCMA 2014 Annual Report, and
d. approve and authorize the Mayor to execute Amendment No. 6 to the
Agreement for Consultant Services with Water Systems Consulting, Inc.
(“WSC”) in the amount of $29,760 for staff extension services for FY 2014-
2015;
3. direct staff to establish a Water Shortage Emergency Plan;
4. direct staff to establish an in-house Water Shortage Emergency Response Team;
and
5. pursue scheduling a joint water workshop with the legislative bodies of Grover
Beach, Pismo Beach and OCSD.
Item 11.a. - Page 1
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 2
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
Staff’s recommendations are designed to achieve the City’s water conservation goals by
2020, which provides an implementation period of 5.5 years. Total expenditures
projected for this period are as follows:
Program FY 2014-15 Total
Turf Removal Program $60,000 $330,000
Washing Machine Rebates $8,000 $44,000
Smart Irrigation Controller Program $8,000 $44,000
Landscape Irrigation Retrofit $6,000 $33,000
Plumbing Retrofit Program $52,050 $286,275
System Water Loss Mitigation $25,000 $100,000
City Landscape Irrigation $40,000 $200,000
Water Survey Program $20,000 $110,000
Public Education Campaign $100,000 $410,000
Total $319,050 $1,557,275
It is proposed to budget $100,000 annually the first two years for public education and
then decrease it to $60,000 annually. System water loss mitigation is proposed to be
funded over a four-year period and the City drought tolerant landscape improvements
over a 5-year period. Therefore, total expenditures proposed for FY 2014-15 are
projected to be $319,050. It is proposed to fund the program from the following
projected revenues:
Existing Water Mitigation Fee Funds $190,000
Future Projected Water Mitigation Fee Revenue $275,000
Annual Funds Programmed in Water Fund for Conservation $275,000
Funding Available from Expiration of OCSD Water Purchase Agreement $825,000
Total $1,565,000
The City’s projected share of costs for studies proposed by the NCMA TG to better
manage the area’s water supply and develop a project and overall strategy to protect
the City’s groundwater supply from seawater intrusion are as follows:
NCMA Total City Share (31.92%)
Groundwater Model $750,000 $239,400
Monitoring Well $15,000 $4,788
Salt and Nutrient Management Plan $250,000 $79,800
Groundwater Storage $250,000 $79,800
Management Agreement $100,000 $31,920
Inter-agency Mutual Aid $25,000 $7,980
Supplemental Water Strategy $150,000 $47,880
Item 11.a. - Page 2
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 3
Outreach to Agricultural Community $6,000 $1,915
Regional UWMP $170,000 $54,264
Water Shortage Contingency Plan $50,000 $15,960
Optimization of Surface Water Supply $100,000 $31,920
Total $1,866,000 $595,627
The bulk of the studies are projected to be completed over a similar 5-year period. The
cost sharing methodology was based on the percentage of groundwater allocated
through the settlement agreement. It is proposed to fund these costs from the Water
Availability Fund, which are revenues designed to ensure the continued reliability of the
City’s water supply. There is currently a balance of $1.6 million in this fund.
Therefore, the total appropriation recommended for FY 2014-15 is $914,677. FY 2014-
15 expenditures are proposed to be funded from the following sources:
Existing Water Mitigation Fee Funds $119,050
Annual Funds Programmed in Water Fund for Conservation $50,000
Funding Available from Expiration of OCSD Water Purchase Agreement $150,000
Water Availability Fund $595,627
Total $914,677
All expenditure recommendations have been included in the year-end budget for
Council approval of the appropriations. These proposed expenses may however be
distributed over multiple fiscal years and some of the above requested funds may be
rolled over into future budget years. The recommendations will result in a substantial
commitment of staff resources. However, addressing water supply is one of the City’s
priorities identified in the Critical Needs Action Plan. It is also important to note that the
other participating NCMA agencies, City of Grover Beach, City of Pismo Beach and the
Oceano Community Services District, will be requested to participate in the financing of
the NCMA management projects.
BACKGROUND:
The City’s long-term water supply was identified as a significant issue during
development of the City’s 2001 General Plan Update. At the August 24, 2004 meeting,
the City Council reviewed a Water Alternatives Study identifying 17 alternatives for
Council consideration. Since that time, a number of studies have been completed on
the following alternatives:
Nacimiento Water project
Price Canyon oil field recycled water
Desalination
Recycled water
Item 11.a. - Page 3
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 4
Raising of the spillway at the Lopez Lake dam
Acquisition of State water
Lopez Spillway Raise study
The South San Luis Obispo County Sanitation District contracted with the Wallace
Group in 2009 for a comprehensive Water Recycling Study, which was an update to an
original study prepared in 2001. Additional studies were prepared in 2010 to assess the
potential for a distribution system from either the South County Sanitation District or
Pismo Beach wastewater treatment plants to potential users.
The limited number of user sites has been a barrier to making installation of a
distribution system for turf irrigation cost effective and worthwhile. As a result, recent
focus has been on determining the feasibility of using recycled water for groundwater
recharge through crop irrigation, stream augmentation, or recharge by injection or
surface spreading.
Among other recommendations, the report proposed to:
Conduct additional feasibility studies to address hydrogeologic issues relative to
aquifer recharge. This study is needed to define the locations suitable for
injection or spreading basins, and to consider well locations for possible
seawater barrier protection.
The original strategy was to pursue grant funds for these efforts, which has been
unsuccessful. In order to make progress on this effort, it is now currently proposed to
locally fund necessary feasibility studies and pursue grants for construction of any
recommended project deemed feasible.
In 2008, it was determined the City had utilized 99% of its water entitlements. At the
August 12, 2008 meeting, the City Council approved a Resolution declaring a “severely
restricted water supply condition.” Mandatory conservation measures were enacted.
These measures were later made permanent in 2010. Meanwhile, the City’s water
conservation program and tiered rate structure were expanded. In January 2009, the
City entered into a 5-year temporary water purchase agreement with the Oceano
Community Service District (OCSD), which expired in March of 2014. Well #10 was
completed in 2011 and Well #11 is currently in design and scheduled for completion by
the end of 2014.
In 2009, low groundwater levels and high chloride concentrations from water quality
tests of one of the sentry wells located along the coast gave indications of incipit
seawater intrusion. At the November 10, 2009 meeting, the City Council adopted an
Interim Urgency Ordinance establishing a development moratorium. The moratorium
was extended at the December 8, 2009 and April 13, 2010 meetings. The moratorium
Item 11.a. - Page 4
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 5
later expired in 2010. The State of California also enacted the Water Conservation Act
2009, which required a reduction of 20% in per capita water use by the year 2020.
In June 2010, staff presented a water analysis and strategies to the City Council, which
identified a projected need of approximately 400 additional acre feet of water to meet
the community's needs when it reaches its buildout population under the current
General Plan. It was agreed to address these needs by expanding water conservation
efforts, seeking purchase of State water, and to continue working on the potential for a
water recycling project in the future. The City Council directed staff to prepare a ballot
measure for the June 2012 election to enable purchase of State water. However, due
to a number of concerns, this was later delayed to obtain additional data and further
study of other alternatives.
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. Additionally, the
group assumes the technical work in planning for the groundwater sub-basin and overall
area water supply. The Technical Group includes representatives from Arroyo Grande,
Grover Beach, Pismo Beach and OCSD. A consultant has also been jointly contracted
by the agencies to help coordinate these efforts.
On January 17, 2014, Governor Brown issued a proclamation declaring a Drought State
of Emergency for the State of California. Local urban water suppliers and municipalities
are called upon to implement their local water shortage contingency plans immediately
in order to avoid or forestall outright restrictions that could become necessary later in
the drought season. The City implemented its contingency plan and permanent
mandatory conservation measures in 2010. Additionally, a statewide water
conservation campaign calls on Californians to reduce their water usage by 20 percent.
Local water agencies are also required to update their legally required urban and
agricultural water management plans to help plan for extended drought conditions. The
City’s plan is up to date and is required to be updated again in 2015.
Staff has drawn two conclusions from the severity of the current drought. First, the
likelihood of identifying agencies interested in selling permanent water supply to the City
is increasingly improbable. Second, protecting and securing the City’s existing water
supply should be the highest priority since having dependable water sources is more
valuable than a larger water supply that is unreliable when most needed. As a result,
staff’s recommendations are designed to accomplish the following goals:
Item 11.a. - Page 5
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 6
Meet the City’s future projected water demand of its buildout population by;
o Meeting the reduction in per capita use as prescribed in the Water
Conservation Act of 2009;
o Proceeding with work necessary to develop a recycled water project that can
be used to prevent seawater intrusion in order to provide long-range
protection of the City’s groundwater supply; and
Ensure water use efficiency and drought protection through regional conjunctive
use, storage and management of surface and groundwater supplies.
ANALYSIS OF ISSUES:
Water Supply and Demand
Table 1 below shows the current and projected water supply through 2030.
Table - 1. Current and Projected Water Supply – AFY
Water Supply Sources 2010 2015 2020 2025 2030
Groundwater – Santa
Maria Groundwater Basin 1,323 1,323 1,323 1,323 1,323
Groundwater – Pismo
Formation1 80 200 200 200 200
County of San Luis Obispo
Lopez Reservoir Project 2,290 2,290 2,290 2,290 2,290
Oceano Community
Services District 2 100
TOTAL 3,793 3,813 3,813 3,813 3,813
1 Assumes 80 AFY of groundwater from Well No. 9, 80 AFY from Well No. 10, and 40 AFY from Well No.
11 will be available as a reliable source of supply from 2015 through 2030.
2 Assumes that the remaining three years of the five year contract of 100 AFY with OCSD will be utilized
in 2012,2013 and 2014.
Item 11.a. - Page 6
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 7
Summary of Water Reduction Requirements for State Senate Bill X7-7:
Table 2 below shows the projected water use by customer classification by 2015.
Table 2. Projected Water Use by Category 2015 (AFY)
2015
Metered
Not Metered
Total
Water use sectors # of
Connections Volume # of
Connections Volume Volume
Single family 6,025 2,280 0 0 2,280
Multi-family 111 312 0 0 312
Commercial 413 312 0 0 312
Industrial 0 0 0 0 0
Institutional/ governmental 51 94 0 0 94
Landscape 123 125 0 0 125
Agriculture 0 0 0 0 0
Other 0 0 0 0 0
Total 6,723 3,123 0 0 3,123
Overview of Growth Projections
According to the Census, Arroyo Grande grew 10.2 percent between 1990 and 2000
and 8.8 percent between 2000 (15,851) and 2010 (17,252). The California Department
of Finance provides more updated population data and shows that the City decreased
its population by 0.5% between 2013 and 2014 (17,415 to 17,334). Current estimates
by the San Luis Obispo Council of Governments (SLOCOG) in their 2040 Regional
Growth Forecast (August 2011) project the City’s population to be approximately 18,407
residents by 2020, based upon an annual growth rate of 0.72%. The City’s 2001
General Plan estimates that a buildout population of 20,000 will be reached by 2023.
Given that the City has not experienced a continuous 1% growth rate as estimated in
the General Plan, buildout will likely be later than 2023.
Item 11.a. - Page 7
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 8
Overview of City’s Annual Water Reduction Goals
Figure 1 shows the projected per capita use production to meet the State water conservation reduction
goal:
The City Council adopted a Water Conservation Program in May of 2003. Phase I of
the program began in April of 2004, which focused on retrofitting existing residential
plumbing with low flow fixtures. In 2008, the City Council appropriated $50,000 from the
Water Neutralization Fund to initiate water conservation rebate programs for turf
removal, high efficiency washing machines and smart irrigation controllers. Staff
recommends that a landscape irrigation retrofit program, system water loss mitigation
project, City landscape irrigation retrofit program, and a water use survey program be
added to the water conservation strategy. An overview of these programs is discussed
below.
Item 11.a. - Page 8
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 9
Water Conservation Recommendations
Below is a pie chart outlining the proposed Water Conservation Strategy to meet the
target of 149 gallons per resident per day by 2020.
Summary of Water Conservation Programs
Plumbing Retrofit Program (existing)
Cash for Grass Rebate Program (existing)
Water Efficient Washing Machine Rebate Program (existing)
Smart Irrigation Controller and Sensor Program (existing)
Large Area Irrigation Retrofits (existing)
Landscape irrigation retrofit program (proposed)
Public Education Program (proposed)
System Water Loss Mitigation Project (proposed)
City Landscape Irrigation Retrofit Program (proposed)
Water Use Survey Program (proposed)
Item 11.a. - Page 9
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 10
The Plumbing Retrofit Program replaces old, high water-use fixtures for residential units
built prior to 1992. All parts and labor required for the retrofit are provided free of
charge. The retrofit includes replacing the following fixtures:
Toilets – replace with ultra low-flow 1.6 gallons per flush (as of January 1, 2014 the
requirement is 1.28 gallons per flush). Cost is $235 - $290 per toilet.
Indoor Faucets – install aerators designed for 2.0 gallons per minute. Cost is $5
per faucet.
Showerheads – replace with 2.5 gallons per minute. Cost is $13 per showerhead.
Pressure Regulator – inspect and adjust or install new regulator not to exceed 80
pounds per inch (pi). Cost is $135 for new pressure regulator.
This program is voluntary; however, in February 2005 the City Council adopted an
ordinance implementing a mandatory plumbing retrofit program upon the change of
ownership of any real property. The seller must retrofit the property’s plumbing fixtures
to meet the criteria of low-water use. Staff estimates that his program saves 7.5 AFY of
water. The goal is to retrofit 150 homes per year. Staff recommends that this program
continue with no changes.
The Cash for Grass Rebate Program provides a financial incentive for homeowners and
businesses to remove existing turf and replace it with a less water-intensive landscape.
The goal of the program is to encourage a permanent reduction in the amount of water
used for landscaping. The City currently pays $0.50 per square foot of turf removed.
The minimum amount of turf to be removed must be 250 square feet ($125) and the
maximum amount of turf to be reimbursed is 5,000 square feet ($2,500). To date, 121
turf removal projects have been completed removing 14,716 square feet (3.23 acres) of
grass. Staff estimates that this program saves 3.3 acre feet per year (AFY) of water.
In an effort to increase participation, staff recommends increasing the rebate from $0.50
a square foot to $1.00. The goal is to achieve 50 turf replacement projects per year.
Staff also recommends increasing the minimum amount of turf removed from 250 to 500
square feet as there has been limited water savings with the smaller turf removal
projects.
The Water Efficient Washing Machine Rebate Program provides a rebate of $100 for
Consortium for Energy Efficiency (CEE) Tier 2 washers and $150 for CEE Tier 3
washers. On average, a high high-efficiency washer uses 20% less energy and 35%
less water than regular washers, which can save up to 5,250 gallons per year per
household. To date, 102 rebates have been issued. Staff estimates that 0.8 AFY of
water is saved with this program. The goal is to replace 40 washers per year.
Staff recommends that only CEE Tier 3 washers be rebated since they save the most
water, and the rebate amount be increased from $150 to $200 as an added incentive.
Item 11.a. - Page 10
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 11
The Smart Irrigation Controller and Sensor Program provides an irrigation audit with
recommendations for system improvements and a smart controller with weather-based
sensor technology to replace older controllers for residential properties. The City pays
up to $300 for a new controller per residence. The City contracts with Sprinkler King,
Inc. to conduct the water audits and provide the controllers to qualifying participants. To
date, 65 water audits have been performed with new controllers installed. The
estimated water savings is 0.9 AFY with this program. The goal is to achieve 20
installations per year. Staff recommends that this program continue with no changes.
Since 2009, the City has contributed to Large Area Irrigation Retrofits for commercial,
institutional and homeowner association (HOA) water users. To date, the City, with the
assistance of Sprinkler King, Inc., have retrofitted the following properties:
Strother Park
St. Patrick’s School
Sunrise Terrace Mobil Home Park
Paulding School
Ocean View School
Vista Del Mar HOA
Wildwood Ranch HOA
Five Cities Center
Kmart Center
Cemetery District
Rancho Grande Park
It is estimated that 17.39 AFY is saved from the Strother Park, Paulding School, Ocean
View School, Cemetery District and Rancho Grande Park retrofits (audits have not been
completed for the other properties). Staff recommends that this program continue with
no changes. The goal is to contact other large commercial, institutional and HOA water
users to encourage participation in the program.
The proposed Landscape Irrigation Retrofit Program includes retrofitting outdated spray
heads and drip emitters for existing residences. Sprinkler King, Inc. has conducted 60
residential irrigation audits for the City and provided information on the average sized
landscape retrofit. This includes replacing 25 sprinkler heads with MP rotators and/or
drip irrigation emitters. The estimated water savings is 30% per retrofit. The cost for an
average residential irrigation retrofit using MP rotators and emitters, less labor and tax
costs, is $200. The estimated water savings is 0.8 AFY. The goal is to achieve 20
installations per year. Staff recommends this program be added as a new water
conservation rebate program.
Item 11.a. - Page 11
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 12
The proposed Public Education Program would involve hiring a consultant to design an
extensive public education marketing campaign to encourage water conservation
citywide. The marketing campaign is proposed to include, but not be limited to,
development of press releases, advertisements, brochures, posters, billboards and
video segments for the government access channel. The estimated total water savings
is approximately 23 AFY.
The proposed System Water Loss Mitigation Project will provide funding for a leak
detection survey of the City’s water distribution system. Approximately seven percent
(7%) of the water produced or delivered to the City is lost through leaks, inaccurate
water meters or other unaccounted for water loss. Most water distribution systems
have typical water losses of between 5% and 10%. Staff believes that through a
comprehensive leak detection survey and repair of identified water loss locations, a 2%
reduction to the City’s water system loss is attainable. A 2% reduction in water loss will
generate a water savings of approximately 12.4 acre-feet.
The proposed City-owned Property Landscape Irrigation Retrofit Program will provide
funding for a comprehensive effort to reduce water use at City parks and landscape
areas. This program will involve turf removal and irrigation retrofit projects. Turf
removal areas will be re-landscaped with drought tolerant landscaping. Arroyo Grande
in Bloom will be consulted on the re-landscaping designs and final design plans are
proposed to be reviewed by the Arroyo Grande Parks and Recreation Commission.
This proposed program is also important because beginning in FY 2014-15, water costs
for City parks and landscape areas will be charged to the General Fund. Previously
water costs were borne by the Water Fund. It is estimated that this program will
generate a water savings of approximately 14 acre-feet.
The proposed Water Use Survey Program is proposed to involve the use of existing
Public Works Utilities Division staff to conduct water use surveys at targeted residential
and commercial properties. If approved, funding for this program will be utilized to hire
a temporary employee to back-fill the duties of one current Utilities Division employee.
During the five and one-half year program, staff’s goal will be to contact all of our water
system customers to arrange for a Water Use Survey. However, the high use customers
will be targeted first. Following the Water Use Survey, customers will be referred to
existing water conservation programs and other necessary corrections that will help the
customer reduce water use. It is estimated that this program will generate a annual
water savings of approximately 2.5 acre-feet in addition to increasing participation in
other incentive programs.
Item 11.a. - Page 12
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 13
Projected Water Savings:
Table 3 depicts the projected savings and costs for the various water conservation
programs and efforts stated above based upon targets established for each proposed
measure. The overall recommendations are designed to demonstrate how the City can
accomplish and fund the efforts necessary to reach the total water use savings target.
Table 3. Program Water Savings and Costs
Program Description Quantity
Per Year
or %
Annual
Savings
(AFY)
Cumulative
Savings
(AFY)
Total
%
Anticipated
Cost
Cost
Per AF
Cash for Grass Based on 50
individual turf
replacement
projects per
year. 50 3.3 18.2 15% $330,000 $18,182
Washing
Machine Rebate
Based on 40
rebates per
year. 40 0.8 4.4 4% $44,000 $10,000
Smart Irrigation
Controller
Based on 20
installations per
year. 20 0.9 5.0 4% $33,000
46,667
Landscape
Irrigation Retrofit
Based on 20
installations per
year. 20 0.8 4.4 4% $55,000 $12,500
Plumbing
Retrofit
Based on 150
homes per year. 150 7.5 41.3 33% $286,275
$6,940
System Water
Loss Mitigation
Based on
converting loss
from 7% to 5%
resulting from a
leak detection
audit. 2% 12.4 12.4 10% $100,000
$8,065
City Landscape
Irrigation Retrofit
25% reduction
from current
total use
(current annual
is 56AF). 25% 14 14.0 11% $200,000
$14,286
Water Survey SFR and MFR
water audit
program. Hire
employee to
conduct audits. 1% 205 2.5 2% $110,000
$44,000
Education
Campaign
7.5% overall
savings based
on Federal
survey results. 7.50% 23.25 23.3 19% $410,000 $17,634
TOTAL:
101% $1,568,275 $12,516
TOTAL WATER SAVINGS TARGET – 2020: 124
Item 11.a. - Page 13
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 14
For comparison purposes, the cost of increasing supply through acquisition of State
water proposed in 2012 was estimated to be a one-time charge of $25,000 to $30,000
per acre foot and an ongoing cost of $1,250 to $1,350 per acre foot. Therefore, in
addition to other practical issues, water conservation measures clearly provide the most
cost efficient approach to addressing water needs.
Implementation Strategies
The City’s Water Conservation Team staff meets regularly to implement the work
program. Existing programs will be augmented to integrate new goals, including issuing
Request for Proposals for the education program and system water loss efforts. Staff
will monitor the program and provide updates to the City Manager.
NCMA Efforts
Annual Reports for the NCMA are prepared pursuant to the requirements of the
Stipulation and 2008 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 are to conduct groundwater monitoring in the NCMA,
and 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 developed water supplies; and
Amount and disposition of other sources of water supply in the NCMA.
Since April 2009, the NCMA TG has coordinated the data compilation and analysis
required in the annual report for court submittal. The most recent report was
submitted in April, 2014 (Attachment 1). Findings from the report include:
Substantial lower than average rainfall;
A significant drop in water levels from 2012;
Data indicating that water levels are sensitive to municipal pumping irrespective of
agricultural pumping;
In 2013, the NCMA agencies pumped 1,423 AF out of a total allocation of 4,330
AFY, which equates to approximately 33% of the total allocation;
Groundwater pumping in the NCMA area accounts for approximately 39% of total
water use;
Excessive pumping on the Mesa has created a landward gradient that eliminates
the historic recharge volume of subsurface inflow into the NCMA (thereby reducing
the yield of the aquifer), and creates conditions favorable to seawater intrusion in
the NCMA and Nipomo Mesa Management Area; and
Continued average water level values are below an established index and indicate
a potential environment for increased risk of seawater intrusion.
Item 11.a. - Page 14
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 15
This last factor is important considering effects of any increased pumpage related to
cutbacks in surface water deliveries (state water and Lopez surplus water) because the
index level is similar to the level seen in 2008-2009 just prior to observing the elevated
chloride concentrations in one of the sentry wells. Data analysis indicates there is a
probable lag time before signatures of seawater intrusion would be observed after a
period of several months of low water levels. A summary of the annual report from the
consultant will be presented at the Council meeting.
The NCMA work program has evolved to increase and augment water sampling by the
rehabilitation of wells, increased sampling locations, the addition of transducers, the
coordination of data with the county sampling program and the Nipomo Mesa
Management Area Technical Group. The work program for the 2014 NCMA Annual
Report includes the scope of work for the monitoring and reporting program by Fugro
Consultants and staff extension services by Water Systems Consulting (WSC). The
work program for Fugro is substantially the same as that approved for 2013, with the
additional analysis and monitoring included as recommended by the NCMA TG. WSC’s
scope of work for ongoing support services to the NCMA TG includes agency and
contract coordination and administration, along with providing necessary technical
analysis.
Additionally, the NCMA TG has helped secure successful grants to complete additional
studies. Data that is being developed is intended to support an eventual groundwater
model that is critically needed to both inform and enable prediction of groundwater
conditions and facilitate better management and conjunctive use of the area’s water
resources. Grant efforts nearing completion include the Integrated Regional Water
Management (IRWM) Planning Grants to improve the characterization of the NCMA and
Nipomo Mesa Management Area (NMMA), portions of the Santa Maria Groundwater
Basin, and a regional recycled water study.
One important step taken by the NCMA TG was to establish the early indicator for
seawater intrusion based upon historical data and referred to as the “deep well index”
that is described in the annual report. Additional data was collected on May 5, 2014
that showed that the value of the deep well index had been declining at an average
daily rate of about 0.24 feet between mid-April and early May. The NCMA TG has
directed consultants to continue an increased data download and analysis to better
observe any potential indicators of seawater intrusion.
From a long-term perspective, what makes this an even more significant concern is the
fact that the NCMA jurisdictions are only pumping approximately one-third of their
entitlements. Therefore, decreasing groundwater levels not only provide a short-term
issue, but brings into question whether current allocations of groundwater are realistic
Item 11.a. - Page 15
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 16
on a long-term basis when jurisdictions approach full use of their entitlements. The
proposed groundwater model discussed further below will help address these concerns.
NCMA Strategic Plan
A key water supply planning and management activity started in late 2013 by the NCMA
TG is the initiation of joint Strategic Planning efforts for the purpose of providing a
framework for identifying common water resource planning goals and objectives and to
establish a 10-year work plan for implementation of those efforts (Attachment 2).
Several key objectives have been identified, including water supply reliability, increased
outreach, and basin management. The mission statement is set forth below.
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
Several strategic initiatives were developed, prioritized, ranked and ultimately included
in an implementation plan and proposed budget. Key efforts include:
Intertie Plan and Inter-agency Mutual Aid requirements – this effort includes
developing an intertie model and evaluating upgrades to connect pipes and
develop pipe capacity to deliver water between agencies as well as necessary
mutual aid agreements in order to protect against vulnerabilities due to drought or
loss of specific water supplies.
Water Shortage Contingency Plan - this effort includes coordinating urban water
management plans for the northern cities and developing a coordinated plan of
action to respond to a severe shortage condition within the NCMA.
Salt and Nutrient Management Plan –this study will shortly be required by the State
and will provide data for the development of a groundwater model. The current
grant study nearing completion (the Santa Maria Ground Water Basin
Characterization) will inform this plan.
Groundwater Model – this will allow simulation and prediction of aquifer condition
and improve the understanding of the movement of groundwater within the basin.
The model would also be necessary to determine the potential benefit of various
water supply enhancement projects and management strategies. Ultimately, this is
the pivotal tool to allow the agencies to identify the most effective strategy for
enhancing the conjunctive use of the basin and improving the water supply
reliability for the region.
Recycled Water Supplemental Supply – this will allow the NCMA agencies to put
their wastewater supplies to beneficial use. Through use of the groundwater
model, alternative strategies for the implementation of recycled water (e.g.
Item 11.a. - Page 16
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 17
landscape irrigation, groundwater recharge, seawater intrusion barrier, and/or
agricultural irrigation, etc.) can be analyzed to identify the most cost effective
strategy for utilizing recycled water to develop a drought proof supplemental
supply.
Water Emergency Plan
Staff is confident that the proposed measures present the most feasible and cost
effective approach to meeting the City's long-term water needs based upon current
projections and water sources. This includes the ability to accommodate normal
drought cycles. In addition, efforts proposed by the NCMA will ensure the groundwater
table is managed in the most responsible manner in order to best prevent damage to
the viability of this water supply. However, any type of project to substantially protect
the City's groundwater supply on a permanent basis will realistically take at least 10
years in a best case scenario, will be costly, and may ultimately be determined to be
infeasible. In addition, the recommendations do not achieve a buffer in the future
projected supply as was previously included in the former water supply strategy goals
established. Therefore, it is important to recognize that these recommendations do
not provide the diversification of water supply necessary to easily withstand an
unanticipated extended drought.
The City permanently implemented mandatory conservation measures that were
formerly identified as a first and second stage of measures. This leaves only the option
of implementing Critical Water Supply Condition measures, which are enacted when
usage meets 100% of supply. As such, the City does not have the options necessary to
implement escalating measures in response to an impending water crisis. In addition,
the current declaration is based simply on water use as a percentage of supply. It does
not address complex decisions that may be necessary involving the level of pumping
that would be authorized if evidence of seawater intrusion were to occur.
As a result, it is recommended that staff develop recommendations for an enhanced
water emergency plan that can be implemented during a water emergency that may
occur as a result of an extended drought. The purpose of the plan would be to provide
measures that could be implemented on a phased basis as an emergency worsened,
establish policy direction on how to respond to water supply management decisions
during a severe extended drought, and to determine the practical steps that would be
necessary to implement emergency measures when necessary. It is anticipated that
the plan will be implemented through an ordinance that will include steps required when
vulnerabilities in any City water supplies appear imminent. This plan would be
developed in coordination with the NCMA Intertie Plan, Inter-agency Mutual Aid
requirements and Water Shortage Contingency Plan. It will be important to develop this
plan over the next few months because another drought year could begin to trigger
water emergency conditions.
Item 11.a. - Page 17
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 18
City and Regional Coordination
Consistent with the Urban Water Management Planning Act, the California Department
of Water Resources (DWR) Drought Planning Guidance and the City’s Urban Water
Management Plan, staff is recommending establishment of a Water Shortage Response
Team (WSRT) for the purposes of water shortage contingency planning. Contingency
planning before a shortage allows selection of appropriate responses consistent with
the varying severity of shortages. The City’s WSRT is recommended to consist of the
Community Development Director, Public Works Director, Administrative Services
Director, Water Utilities Supervisor, and the Associate Planner/Water Conservation
Coordinator.
Regional coordination is central to protection of regional supplies, including the
groundwater basin, surface water and ultimately to developing recycled water. It is
recommended that a joint workshop with other jurisdictions and agricultural members be
scheduled in the Fall. Ultimately, to meet State guidelines, a Regional Drought Task
Force should also be established to include representatives from each agency.
ALTERNATIVES:
The following alternatives are provided for the Council’s consideration:
1. Approve staff’s recommendations;
2. Modify the proposed measures and/or targets and direct staff to proceed;
3. Develop more mandatory measures to reduce costs of incentives;
4. Pursue State Water purchase;
5. Pursue permanent purchase of water supply from OCSD or other jurisdictions;
6. Implement a drought surcharge per the State Water Code; or
7. Provide staff other direction.
ADVANTAGES:
Conservation efforts are the most cost effective option to address water needs and are
within the City’s control to proceed. The proposed NCMA studies are designed to
protect the groundwater supply and ensure the City will have access to its full allocation
in the future of this water resource. Recommendations provide a feasible alternative to
meet both demand and State requirements. Lastly, these initial steps can be fully
funded without rate increases.
DISADVANTAGES:
The recommendations will result in a significant cost. In addition, a recycled water
strategy will require future costs likely to trigger significant rate increases and will
depend on cooperation of neighboring jurisdictions. The recommendations will likely not
address demand during an extended drought period within the next ten year period.
Lastly, by approving the agreement and amended agreement, the City will need to pay
Item 11.a. - Page 18
CITY COUNCIL
CONSIDERATION OF WATER SUPPLY STRATEGY AND AMENDMENTS TO
CONSULTANT SERVICES AGREEMENTS FOR THE NORTHERN CITIES
MANAGEMENT AREA WORK PROGRAM
JUNE 10, 2014
PAGE 19
its share of the cost, which is approximately 31% according to the Arroyo Grande
Groundwater Basin Management Agreement.
ENVIRONMENTAL REVIEW:
No environmental review is required for this item.
PUBLIC NOTIFICATION AND COMMENTS:
The Agenda was posted in front of City Hall on Thursday, June 5, 2014. The Agenda
and staff report were posted on the City’s website on Friday, June 6, 2014. No public
comments were received.
Attachments:
1. NCMA 2013 Annual Report
2. NCMA Strategic Plan
Item 11.a. - Page 19
CONSULTANT SERVICES AGREEMENT
AMENDMENT NO. 1
This First Amendment ("First Amendment") to Consultant's Services Agreement ("GSA")
by and between the CITY OF ARROYO GRANDE and FUGRO CONSULTANTS, INC.,
is made and entered into this day of June 2014, based on the following
facts:
WHEREAS, the parties entered into a GSA dated September 10, 2013, to support
services to the Northern Cities Management Area Technical Advisory Committee
(NCMA); and
WHEREAS, the parties desire to modify the GSA as set forth herein.
NOW THEREFORE, for valuable consideration the receipt and sufficiency of which is
acknowledged, the parties agree as follows:
1. The GSA is amended to include the additional services at the increased cost
as specified in Exhibit "A" attached hereto and incorporated herein by this
reference.
2. The term of the GSA shall expire on October 30, 2015.
3. Except as modified herein, all other terms and conditions set forth in the GSA,
as amended, shall remain unchanged.
IN WITNESS WHEREOF, CITY and CONSULTANT have executed this First
Amendment the day and year first above written.
FUGRO CONSULTANTS, INC.
By: _____________ _
CITY OF ARROYO GRANDE
By: _____________ _
Tony Ferrara
Mayor
_j Item 11.a. - Page 20
FUGRO CONSULTANTS, INC.
PROPOSAL
NORTHERN CITIES MANAGEMENT AREA
2014 ANNUAL REPORT
Prepared for:
Exhibit "A"
NORTHERN CITIES MANAGEMENT AREA TECHNICAL GROUP
May 27, 2014
Fugro Proposal No. 04.62149075
.........
.. ·.:.· .. :
... :: __ .. !
Item 11.a. - Page 21
FUGRO CONSULT ANTS, INC.
May 27, 2014
Proposal No. 04.62149075
Northern Cities Management Area Technical Group
c/o Water Systems Consulting, Inc.
3765 South Higuera Street, Suite 102
San Luis Obispo, CA 93401
Attention: Mr. Daniel Heimel, P.E.
660 Clarion Court, Suite A
San Luis Obispo, California 93401
Tel: (805) 542-0797
Fax: (805) 542-9311
Subject: Proposal for Northern Cities Management Area 2014 Annual Report
Dear Mr. Heimel:
Fugro is pleased to submit this proposal to the Northern Cities Management Area (NCMA)
Technical Group for the preparation of the 2014 Annual Report. Similar to the ongoing 2013 Annual
Report project on behalf of the NCMA, Fugro will team with GEl Consultants, Inc. (GEl) and Robert
Almy to provide continuity with the same team as the past 4 years to meet the needs of the NCMA
Technical Group. For the water quality laboratory analysis work, we will use either Capco Analytical
Services or Pat-Chem Laboratories, both of which are CDPH ELAP-certified analytical testing
laboratories.
This proposal is similar in scope to the 2013 Annual Report work effort, and focuses on the
scope of work needed to complete quarterly monitoring of the NCMA sentry wells and prepare the
2014 Annual Report. The proposed work effort will satisfy the primary requirements of the 2005
Stipulation through preparation of an Annual Report. Furthermore, information in the quarterly
reports and Annual Report supports the Technical Group's on-going objective of effective water
resources management.
This year's anticipated fee is $140,000, which is a 12% increase over the 2013 Annual
Report project fee. This fee is based on our experience working with the NCMA, the number of
anticipated meetings throughout the year, and the effort required preparing the annual report.
Thank you for the opportunity to continuing to work with you and the NCMA Technical Group.
Copies Submitted: (PDF) Addressee
Sincerely,
?:JNtr~
Paul Sorensen, C.Hg.
Project Manager
A member of the Fugro group of companies with offices throughout the world
Item 11.a. - Page 22
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
INTRODUCTION
The Northern Cities Management Area (NCMA) Technical Group includes the Cities of
Arroyo Grande, Grover Beach, and Pismo Beach and the Oceano Community Services District
(OCSD). The minimum content of the Annual Report includes:
• Summary of 2013 NCMA groundwater monitoring;
• Changes in groundwater supplies;
• Threats to the groundwater basin;
• Tabulation of NCMA water use;
• Imported water availability and use;
• Developed water availability and use; and
• Groundwater use.
As before, we will use the above list as topical headings for preparation of the 2014
Annual Report.
The following sections of this proposal present the scope of work to be performed, our
approach and the tasks we will complete to produce the 2014 Annual Report for the NCMA
Technical Group. The final sections of this proposal include the anticipated schedule and our
cost estimate for completion of all tasks.
PROJECT TEAM
Fugro will serve as the prime contractor for the NCMA Annual Monitoring and Reporting
Program with support by GEl and Rob Almy. The Fugro team will continue to serve the NCMA
in largely the same manner as in the past year. Paul Sorensen, a hydrogeologist based in San
Luis Obispo, will continue to act as Project Manager and main point of contact for the TG.
Fugro will continue to gather water level and water quality data for the project on a quarterly
basis and complete the data interpretation and report preparation in coordination with GEl and
Rob Almy.
For water quality testing, we will either to continue to rely on Capco Analytical Services,
Inc. (Capco), or Pat-Chem Laboratories. Both firms are privately owned, full service,
environmental and analytical testing laboratories certified by the State of California (CDPH
ELAP certified). Both firms are located in the Ventura area, and Fugro has a long history of
collaboration with both laboratories.
1
Item 11.a. - Page 23
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
SCOPE OF WORK
This scope of work is based on the following sources of information:
a The requirements of the 2013 Request for Proposal, which formed the basis for our
work for the past year, and;
a Our experience preparing the Annual Reports and associated quarterly monitoring
reports for 2010 through 2013 (four years);
TASK 1.1 NCMA GROUNDWATER MONITORING AND REPORT SCHEDULE
The current contract for technical services related to the 2013 Annual Report will
terminate in September 2014. Assuming a Notice to Proceed {NTP) and authorization of the
2014 Annual Report project will be issued before October 2014, we will provide a detailed
schedule of all tasks, anticipated meetings, and report preparation efforts within 14 days of the
NTP. In order to complete the first round of monitoring by mid-October, which is the normal
schedule for the 04 monitoring event, all agreements need to be in place by the first of October.
TASK 1.2 MEETINGS, PROJECT MANAGEMENT, AND COMMUNICATION
The NCMA Technical Group typically meets once per month, although the meeting
frequency increased throughout much of late 2013 I early 2014. The Fugro project manager will
participate in most of the regularly scheduled meetings. For budgeting purposes, we have
assumed full participation in eight (8) of the regular monthly meetings, and teleconference
participation in the other four ( 4) meetings.
TASK 1.3 NCMA GROUNDWATER MONITORING AND WATER QUALITY SAMPLING
Collection of groundwater level measurements and water quality information are core
NCMA responsibilities. Four rounds of water level monitoring and quality testing will occur
during:
a The fourth quarter of 2014 (October 2014 );
a The first quarter of 2015 (January 2015);
" The second quarter of 2015 (April 2015); and
" The third quarter of 2015 (July 2015)
During each sampling event, groundwater depth measurements will be collected in
accordance with the American Society for Testing and Materials (ASTM) Standard D4750-87.
Groundwater water quality samples are to be collected in accordance with the ASTM Standard
D4448-1 using a variety of methods including, in the case of the Oceano CSD monitoring wells,
low-flow methods. During each quarterly sampling event field personnel will:
a Coordinate with and pick-up sample bottles and coolers from either Capco Analytical
Services or Pat-Chem Laboratories, both of Ventura, California;
" Collect a synoptic field measurements of depth to water (in accordance with ASTM
Standard D4750-87) from all 16 wells including:
o 32S/12E-24B01 through -24803 (North Beach Campground),
2
Item 11.a. - Page 24
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
o 32S/13E-30F01 through -30F03 (Highway 1 ),
o 32S/13E-30N01 through -30N03 (Pier Avenue),
o 12N/23W-36L01 and -36L02 (Oceano Dunes),
o Four Oceano CSD monitoring wells (3-inch diameter), and
o 12N/35W-32C3 (County Monitoring Well #3;
11 Collect representative water samples from each of the 16 monitoring wells at six
sites for general mineral analysis and in coordination with County of San Luis
Obispo's quarterly sentry well field measurements. One of the Oceano CSD
monitoring wells is damaged and is not sampled; a sample from Oceano CSD Well
No. 8, which is completed to a similar depth, is collected in its place.
Sampling of the 16 wells will be accomplished by the project hydrogeologist using a
combination of ISCO-type peristaltic pumps, a Grundfos RediFio2 electric submersible pump as
appropriate and as determined by the applicability of each well. Each well will be purged in
accordance with ASTM D4448-1 until such time when field-measured water quality parameters
stabilize and clear water is available. Samples will then be collected in sample containers with
appropriate preservatives, placed in iced coolers immediately following sample collection, and
maintained at appropriate temperature for transportation to the laboratory. Chain-of-custody
documentation will be completed for all samples.
Data collected from the field and laboratory reports will be reviewed by the project
hydrogeologist and project engineer as part of the project QA/QC procedures. Data will be
reviewed for compliance with ASTM standards. Any data not meeting standards for accuracy or
reliability will be flagged and addressed, with new data collected as appropriate. All data
satisfying the QA/QC procedures will be entered in the NCMA database, evaluated by
consultant team members (as discussed under Task 1.4) and compiled into a draft quarterly
report for review.
Sensors measuring pressure and electrical conductivity are installed in five wells
including:
II Well 32S/12E-24B 1;
13 32S/12E-24B3;
m 32S/13E-30F3;
D 32S/13E-30N2; and
D 12N/35W-32C3.
Data from the transducers will be downloaded during quarterly monitoring, calibrated as
needed, compensated for atmospheric pressure variation, then referenced to the project
elevation model. This data will be subjected to QA/QC procedures then entered in the NCMA
database. This data will be interpreted and influences such as regional water level changes,
tidal fluctuations, storm surges, or system pumping discussed.
We will continue to sample Oceano CSD Well No. 8 instead of the Oceano CSD "Silver"
Monitoring Well due to apparent damage to the "Silver" Well.
3
Item 11.a. - Page 25
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
TASK 1.4 NCMA GROUNDWATER DATA ANALYSIS
We will compile and review all data from quarterly ground-water measurements and
laboratory analysis, as well as any applicable data collected by the County of San Luis Obispo.
The data will be evaluated and indications of potential hazards (such as well interference, water
quality degradation, and seawater intrusion) will be identified. The data and analysis will be
included in the quarterly report sent to the NCMA Technical Group within five weeks of the
sampling event.
Water level data will be used to generate hydrographs and contour maps for the annual
report. Water level contour maps during spring and fall conditions will be generated. We will
calculate and provide a diagram of the "deep well index." Representative plots of historical
water quality time-series data for key constituents will be generated at wells with adequate
control to show changes over time in mineral concentrations for these key constituents. Special
attention will be paid to coastal wells.
TASK 1.5 HYDROLOGIC DATA COMPILATION
Several sets of hydrologic data are essential for preparation of the Annual Report.
Some (such as weather data) will be obtained directly from outside sources. We propose to use
the approach currently employed in our most recent data collection and analysis efforts. During
the project, if the we recognize other potential improvements to data sources or methodology
that would result in better or more efficient analysis, we will consult with the TG and either
incorporate those improvements directly in our work or suggest the changes for subsequent
annual reports, as appropriate.
TASK 1.6 NCMA WATER DEMAND AND AVAILABILITY ANALYSIS
We will prepare a detailed analysis of water demand and availability within the NCMA.
Data collection and analysis shall be sufficient to determine land and water uses in the NCMA,
sources of supply to meet those uses, groundwater availability, the amount and disposition of
developed water supplies, and the amount and disposition of any other water supply sources
within the NCMA. The approach and tabulation of results will be included in the annual report.
For preparation of the 2014 Annual Report, we will generally follow the established
methods used in the 2013 Annual Report and those methods developed for the Monitoring
Program for the NCMA, July 2008. As performed as part of the 2012 and 2013 Annual Reports,
we will continue to use a modified approach to calculate applied irrigation for agricultural
demand, the results of which were very close (within 2 percent) to the previous method.
Each component of water use will be evaluated. Urban demands are based on actual
production. Rural demand is estimated and we will likely continue to rely on previous estimates
so long as no significant land use changes occur.
Applied irrigation demand is an indirect estimate using crop-type specific irrigation
requirements by acre and land use data. The project engineer will calculate the applied
irrigation demand based on table values for irrigation scheduling and net water use by crop and
irrigation methods provided by the ITRC (www.itrc.org).
4
Item 11.a. - Page 26
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
The NCMA has three major sources of water supply: Lopez Reservoir, California State
Water Project (SWP), and groundwater. All four municipalities in the NCMA receive water from
Lopez Reservoir. Data on the volume of Lopez deliveries will be compiled for each municipality.
The City of Pismo Beach and Oceano Community Services District receive water from
the SWP. Data on the volume of water delivered to these municipalities will be compiled in the
NCMA database.
Groundwater pumping data are recorded by location and volume by the NCMA. Non-
urban domestic and agricultural groundwater pumping is estimated. These data will be
compiled in the NCMA database.
TASK 1.7 2014 NCMA ANNUAL REPORT PREPARATION
The Fugro team will prepare an Administrative Draft Annual Report for the NCMA
Technical Advisory Group. The report will be based on data collected and analysis performed
as described above, on other data that may become available, and on ongoing discussions with
the NCMA TG. Minimum contents of the report will include:
a Summary of the 2014 NCMA groundwater monitoring;
a Changes in groundwater supplies;
a Threats to the groundwater basin;
a Tabulation of NCMA water use;
a Imported water availability and use; and
a Developed water availability and use.
Electronic copies of the Administrative Draft Annual Report will be provided to the NCMA
and legal counsel a minimum of 8 weeks prior to the report deadline of April 30. Assuming
approximately 2 weeks of review time by the TG and 2 weeks to revise the Administrative Draft
and prepare a Draft Report, the Draft Report will be re-submitted to the NCMA via e-mail
approximately 4 weeks prior to the deadline for the final report. All comments on the Draft
Report will be compiled and incorporated into the Final Report. Electronic copies of the Final
2014 Annual Report will be provided in PDF format.
5
Item 11.a. - Page 27
Northern Cities Management Area Technical Group
May 27, 2014 (Proposal No. 04.62149075)
SCHEDULE AND FEE
Meeting the NCMA schedule is of the utmost importance. We will adhere strictly to the
schedule outlined below in order to meet the required Report submittal by April 30, 2015, as well
as the quarterly sampling events and reports.
We will provide a detailed schedule of all tasks, anticipated meetings, and report
preparation efforts within 14 days of the Notice to Proceed. We have outlined a general
schedule below:
Notice to Proceed and contracts in place
Detailed Schedule
Quarterly Sampling and Monitoring Events
Quarterly Reports Submitted to NCMA TG
NMMA and SMVMA Coordination Meetings
Administrative Draft Annual Report
Draft Annual Report
Final Report Due
By mid-September, 2014
On or before October 13, 2014 (regularly
scheduled October TG meeting)
Mid-October, 2014
Mid-January 2015
Mid-April 2015
Mid-July 2015
End November 2014
End February 2015
End May 2015
End August 2015
TBD
February 27, 2015
April 3, 2015
April 30, 2015
Fugro proposes to provide the services described above on a time and materials basis
with a not to exceed amount of $140,000. The cost of the work will be prorated among the
NCMA group pursuant to the cost sharing agreement based on the fraction of groundwater
allocation. The pro-rata basis for project fee cost-sharing is shown below:
Arroyo Grande
Grover Beach
Oceano CSD
Pismo Beach
Total
NCMA 2014 Annual
Report
Cost Breakdown
$43,400.
$44,800.
$29,400.
$22,400.
$140,000
6
Fraction
0.31
0.32
0.21
0.16
1.00
Item 11.a. - Page 28
CONSULTANT SERVICES AGREEMENT
AMENDMENT NO.6
This Sixth Amendment ("Sixth Amendment") to Consultant's Services Agreement ("CSA") by and between
the CITY OF ARROYO GRANDE and WATER SYSTEMS CONSULTING INC. (WSC), is made and
entered into this day of June, 2014 based on the following facts:
WHEREAS, the parties entered into a CSA dated March 16, 2010 to provide as-needed staff extension
services to the Northern Cities Management Area Technical Advisory Committee (NCMA); and
WHEREAS, the parties entered into a First Amendment to CSA dated September 26, 2011 to continue to
provide support services to the Northern Cities Management Area Technical Group; and
WHEREAS, the parties entered into a Second Amendment to CSA dated September 25, 2012 to
continue to provide support services to the Northern Cities Management Area Technical Group; and
WHEREAS, the parties entered into a Third Amendment to CSA dated January 22, 2013 for additional
costs related to associated technical support for coordinated management of the groundwater basin; and
WHEREAS, the parties entered into a Fourth Amendment to CSA dated September 10, 2013 for
additional costs related to associated technical support to coordinated management of the groundwater
basin; and
WHEREAS, the parties entered into a Fifth Amendment to CSA dated April 8, 2014 for additional costs
related to associated technical support to coordinated management of the groundwater basin; and
WHEREAS, the parties desire to further modify the CSA as set forth herein.
NOW THEREFORE, for valuable consideration the receipt and sufficiency of which is hereby
acknowledged, the parties agree as follows:
1. The CSA is amended to include the additional services at the increased cost related to the
2014 Annual Report, related coordinated technical support, and preparation of a water
supply, production and delivery plan as specified in Exhibits "A" attached hereto and
incorporated herein by this reference.
2. The term of the CSA shall expire on September 10, 2015.
3. Except as modified herein, all other terms and conditions set forth in the CSA, as amended,
shall remain unchanged and in full force and effect.
IN WITNESS WHEREOF, CITY and CONSULTANT have executed this Sixth Amendment the day and
year first above written.
WATER SYSTEMS CONSULTING INC.
By: ____________ _
CITY OF ARROYO GRANDE
By: ____________ _
Tony Ferrara
Mayor
Item 11.a. - Page 29
3/10/2014
Northern Cities Management Area Technical Group
Oceano Community Services District
City of Arroyo Grande
City of Grover Beach
City of Pismo Beach
Exhibit "A"
SUBJECT: PROPOSAL TO PROVIDE EXTENSION SERVICES FOR THE NORTHERN CITIES MANAGEMENT AREA
TECHNICAL GROUP FOR FY 2014-15
Dear Northern Cities Management Are Technical Group,
As requested, WSC has prepared the following proposal to provide ongoing staff extension services to lead
various technical and managerial activities in support of the Northern Cities Management Area Technical
Group (NCMA TG) for FY 2014-15. The purpose of the staff extension services is to provide as-needed staff
extension to assist the NCMA TG in managing their water supply portfolios and project management services
of for the preparation of its Annual Report. Mr. Jeff Szytel will serve as the Principal-In-Charge and Mr. Daniel
Heimel will serve as the Project Manager and lead resource for WSC. Additional support will be provided by
WSC staff and/or specialty sub-consultants as-needed. Consistent with our ongoing staff extension services
role, it is envisioned that these activities would include the following tasks:
Task 1. Staff Extension
WSC will serve as an extension of the NCMA member agencies' staff to manage the activities of the NCMA TG.
WSC's activities are expected to include:
• Organize and lead NCMA TG meetings
• Attend Zone 3 TAC meetings on behalf of the NCMA TG
• Review analysis and recommendations for the items on the committee agendas
• Advise on proposals by the County
• Provide additional research and options as-needed
• Provide independent technical review of various work products
• Provide as-needed technical and/or managerial support
• Participate and coordinate regional water management activities on behalf of the NCMA TG
• Provide Annual Report Project Management, including:
o Contract coordination and administration
o Management of project budget and schedule
o Coordination with the consultant(s) and NCMA member agencies to set meetings, obtain data,
and maintain project progress
o Technical review of consultant deliverables
o City Council and Board of Directors presentations
• Strategic Planning efforts for the NCMA TG
• Pursuit of grant opportunities
Item 11.a. - Page 30
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NCMA TG, page 3
Jeffery M. Szytel, P.E., MBA
Principal
Daniel Heimel, P.E., M.S.
Project Engineer
3/10/2014
Item 11.a. - Page 32
FUGRO CONSULTANTS, INC.
NORTHERN CITIES MANAGEMENT AREA
2013 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
Prepared by:
Fugro Consultants, Inc.
April 28, 2014
ATTACHMENT 1
Item 11.a. - Page 33
660 Clarion Court, Suite A
San Luis Obispo, California 93401
Tel: (805) 542-0797
Fax: (805) 542-9311
A member of the Fugro group of companies with offices throughout the world
FUGRO CONSULTANTS, INC.
April 28, 2014
Project No. 04.62130129
Northern Cities Management Area
Northern Cities Management Area
2013 Annual Monitoring Report
Fugro Consultants is pleased to submit the 2013 Annual Monitoring Report for the
Northern Cities Management Area. The report is prepared pursuant to the requirements of the
Stipulation and Judgment for the Santa Maria Groundwater Adjudication. The report is
prepared on behalf of the Northern Cities Management Area, which is comprised of the City of
Arroyo Grande, City of Grover Beach, Oceano Community Services District, and City of Pismo
Beach.
Sincerely,
FUGRO CONSULTANTS, INC.
Paul A. Sorensen, PG, CHg Timothy A. Nicely, PG, CHG
Principal Hydrogeologist Senior Hydrogeologist
Project Manager
GEI CONSULTANTS, INC.
Robert Almy, PG Samuel W. Schaefer, PE
Senior Engineer
Item 11.a. - Page 34
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2013 NCMA Annual Report Final.Doc - i -
CONTENTS
Page
1.0 EXECUTIVE SUMMARY.............................................................................................ES1
1.1 Findings............................................................................................................ES1
2.0 INTRODUCTION...............................................................................................................1
2.1 Introduction............................................................................................................1
2.2 Background...........................................................................................................2
2.2.1 Description of the Northern Cities Management Area Technical Group.......2
2.2.2 Coordination with Management Areas.........................................................3
3.0 BASIN DESCRIPTION......................................................................................................4
3.1 Setting...................................................................................................................4
3.2 Climate..................................................................................................................4
3.2.1 Precipitation..................................................................................................4
3.2.2 Evapotranspiration........................................................................................5
4.0 WATER SUPPLY AND DEMAND.....................................................................................6
4.1 Water Supply.........................................................................................................6
4.1.1 Sources of Supply........................................................................................6
4.1.1.1 Lopez Lake..............................................................................................6
4.1.1.2 State Water Project..................................................................................7
4.1.1.3 Groundwater............................................................................................8
4.1.1.4 Developed Water.....................................................................................8
4.1.1.5 Water Use by Supply Source...................................................................9
4.1.2 Groundwater Conditions.............................................................................11
4.1.2.1 Groundwater Monitoring Network..........................................................11
4.1.2.2 Groundwater Levels...............................................................................12
4.1.2.3 Water Quality.........................................................................................15
4.1.3 Threats to Water Supply.............................................................................17
4.1.3.1 Threats to State Water Project Supply...................................................17
4.1.3.2 Seawater Intrusion.................................................................................18
4.1.3.3 Measures to Avoid Seawater Intrusion..................................................19
4.1.3.4 Change in Groundwater Recharge along NMMA Boundary..................20
4.2 Water Demand....................................................................................................21
4.2.1 Urban Demand...........................................................................................21
4.2.2 Applied Irrigation Demand..........................................................................21
4.2.3 Rural Demand............................................................................................24
4.2.4 Changes in Water Demand........................................................................24
5.0 COMPARISON OF WATER SUPPLY V. WATER DEMAND..........................................26
6.0 MANAGEMENT ACTIVITIES..........................................................................................27
6.1 Management Objectives......................................................................................27
6.1.1 Share Groundwater Resources and Manage Pumping..............................27
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6.1.2 Monitor Supply and Demand and Share Information.................................28
6.1.3 Manage Groundwater Levels and Prevent Seawater Intrusion..................29
6.1.4 Protect Groundwater Quality......................................................................31
6.1.5 Manage Cooperatively................................................................................32
6.1.6 Encourage Water Conservation.................................................................33
6.1.7 Evaluate Alternative Sources of Supply.....................................................35
7.0 REFERENCES................................................................................................................38
TABLES
Page
Table 1. NCMA TG Representatives...........................................................................................2
Table 2. Zone 3 Contractors Water Allocation (AFY)...................................................................6
Table 3. 2013 Lopez Lake Deliveries (AF)...................................................................................7
Table 4. Available Urban Water Supplies, 2013 (AFY)..............................................................10
Table 5. Groundwater Pumpage (AF)........................................................................................11
Table 6. Total Water Demand (Groundwater and Surface Water, AFY)....................................21
Table 7. Gross Irrigation Requirement for WPA 5 by Crop Group.............................................23
Table 8. Estimated Rural Water Demand..................................................................................24
Table 9. 2013 Water Demand by Source (AF)...........................................................................26
FIGURES
(following text)
Figure 1. Santa Maria Groundwater Basin
Figure 2. Northern Cities Management Area
Figure 3. Annual Precipitation 1950 to 2013
Figure 4. Monthly 2013 and Average Precipitation and Evapotranspiration
Figure 5. Municipal Water Use by Source
Figure 6. Total Water Use by Source
Figure 7. Location of Sentry Wells
Figure 8. Depths of Sentry Wells
Figure 9. Water Level Contours, April 2013
Figure 10. Water Level Contours, October 2013
Figure 11. Selected Hydrographs
Figure 12. Sentry Well Hydrographs
Figure 13. Hydrograph of Average Deep Sentry Well Elevations
Figure 14. Water Elevation, Conductivity, and Temperature, Well 24B01
Figure 15. Water Elevation, Conductivity, and Temperature, Well 24B03
Figure 16. Water Elevation, Conductivity, and Temperature, Well 30F03
Figure 17. Water Elevation, Conductivity, and Temperature, Well 30N02
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FIGURES – (CONT.)
(following text)
Figure 18. Water Elevation, Conductivity, and Temperature, Well 32C03
Figure 19. Chloride Concentrations in Sentry Wells
Figure 20. Total Dissolved Solids Concentrations in Sentry Wells
Figure 21. Schoeller Diagram Sentry Well 30N03 (May 2009 - October 2013)
Figure 22. Schoeller Diagram Sentry Well 30N03 (October 2010 - October 2013)
Figure 23. Schoeller Diagram Sentry Well 30N02 (May 2009 - October 2013)
Figure 24. Schoeller Diagram Sentry Well 30N03 (October 2010 - October 2013)
Figure 25. Schoeller Diagram for Sentry Well 24B01
Figure 26. NCMA Agricultural Land 2013
APPENDICES
APPENDIX A NCMA Sentry Well Water Level and Water Quality Data
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NORTHERN CITIES MANAGEMENT AREA
2013 ANNUAL MONITORING REPORT
1.0 EXECUTIVE SUMMARY
This 2013 Annual Report for the Northern Cities Management Area (NCMA) is prepared
pursuant to the requirements of the Stipulation and 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 Northern Cities agencies, consisting of the City of Arroyo Grande, City of Grover
Beach, City of Pismo Beach, and Oceano Community Services District, are to conduct
groundwater monitoring in the NCMA, and 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 developed water supplies; and
Amount and disposition of other sources of water supply in the NCMA.
Results of the data compilation and analysis for calendar year 2013 are documented and
discussed in this Annual Report.
1.1 FINDINGS
Rainfall in the NCMA for calendar year 2013 was 4.32 inches, equal to 27 percent of the
long-term average annual rainfall for the area. Below average rainfall occurred for eight
of the twelve months. Most rainfall typically falls from November through April, however
the year was marked by substantially lower than average rainfall (21 percent of normal)
in the “wet” months of January, February, March, April, November, and December.
Spring (April 2013) groundwater level elevations underlying the NCMA shows
groundwater elevations highest in the eastern portion of the NCMA and approximately 5
feet above sea level along the shore line. A relatively shallow westward-facing pumping
trough developed in the Spring 2013 in the northern part of the area, apparently in
response to municipal pumping in the Arroyo Grande and Grover Beach area. A
comparison with Spring 2012 contours shows that Spring 2013 water levels were
generally 10 to 15 feet lower throughout the NCMA from one year ago.
Fall groundwater elevations in October 2013 were also highest in the eastern portion of
the NCMA, and approximately 2 to 5 feet above sea level along the shoreline.
Groundwater elevations were generally above mean sea level (msl) in the Fall
throughout the NCMA, with the exception of a few measurements in agricultural wells in
the east-central part of the area where water level elevations were measured as deep as
6.7 feet below msl. These lower water level elevations maintain the previously
recognized depression in the water table in the so-called “pumping trough,” located
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south of the municipal well fields and in the vicinity of, and south of, lower Arroyo Grande
Creek. Water elevations in this area are generally 5 to 10 feet lower than levels
measured in Fall 2012.
Total water use in the NCMA in 2013, including urban use by the Northern Cities
agencies as well as applied irrigation and private pumping by rural water users, was
10,722 acre feet (AF). Of this amount, groundwater pumping accounted for
approximately 4,206.7 AF. The breakdown is shown on the following table.
Urban Area Lopez
Lake
State
Water
Project
Groundwater Transfers Other
Supplies Total
Arroyo Grande 2,722.3 0.0 268.4 0.0 120.2 3,110.9
Grover Beach 802.7 0.0 988.8 0.0 0.0 1,791.5
Pismo Beach 1,457.4 618.0 73.0 0.0 0.0 2,148.4
Oceano CSD 44.9 750.0 92.8 0.0 0.0 887.7
Urban Water Use Total 5,027.3 1,368.0 1,423.0 0.0 120.2 7,938.5
Applied Irrigation 0.0 0.0 2,742.0 0.0 0.0 2,742.0
Rural Water Users 0.0 0.0 41.7 0.0 0.0 41.7
Total 5,027.3 1,368.0 4,206.7 0.0 120.2 10,722.2
In April 2013 municipal groundwater pumpage was increased to replace temporarily
unavailable supplies from Lake Lopez. As a result, the groundwater level in Sentry Well
30F03 (Highway 1 well) declined by as much as 14 feet in 7 days and was below sea
level for a total of 6 days. The decline in water level due to increased pumpage required
almost two weeks to recover to the initial water levels observed prior to the increased
pumping. Similar water level declines, albeit of less magnitude, were also observed in
deep wells 24B03 (North Beach Campground) and 30N02 (Pier Avenue).
Averaging the groundwater elevations from the three deep sentry wells provides a
single, representative index for tracking the status and apparent health of the basin.
Previous studies suggest that the deep well index is 7.5 feet NAVD88. As described in
previous Annual Reports, the measured index values of the three deep wells remained
below 7.5 feet between October 2007 and August 2009, during which high
concentrations of chloride and sodium occurred in two sentry wells in late 2009. This
relationship implies a lag in time between lowered water levels in the deep sentry wells
and significant increases in sodium and chloride. This is potentially significant because
the measured index level was as much as 6 feet below the index value of 7.5 in April
2013 and remained at or below the index from early June 2013 until mid-December
2013. Continued average values below the index create a potential environment for
increased risk of sea water intrusion.
The index value ended the year above the 7.5-foot index level. However, February
through April is the time of year that historically has the highest index level value (at
least since January 2010). The index value at the end of 2013 is 2 to 4 feet lower than
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the end of year levels of 2010 through 2012. If the wells experience a 1-foot rise through
February to April followed by a 5-foot decline in water level elevations until October 2014
(as is typical in past years), then the index value may potentially be as low as 4 feet in
October 2014. Considering the effects of any increased pumpage related to anticipated
cutbacks in surface water deliveries, the index level may approach the level seen in
2008-2009, just prior to observing the elevated chloride concentrations in the Pier
Avenue well.
Minor variations and changes in water quality were observed in the sentry wells
throughout the year; however there are no indications of sea water intrusion in the
deeper levels of the groundwater production zone.
The various water quality indicators observed in 2013 suggest that the local
interface/mixing zone between seawater and fresh groundwater remains seaward of the
sentry wells (shoreline). The location of the seawater interface is not known due to the
heterogeneity of the aquifer. The only indication of the location of the interface would be
when one or more monitored wells show an increase in total dissolved solids, chlorides,
sodium, or other constituent along with a geochemical signature resembling seawater.
These changes may be brought on by reduced recharge (e.g. drought conditions) or if
pumping exceeds available groundwater supply, or both.
Numerous management objectives are described in the Annual Report, including
strategies to meet the objectives. Due to potential constraints on supply, all NCMA
agencies, both individually and jointly, are engaged in water resource management
projects, programs, and planning efforts that address water supply and demand issues,
particularly efforts to assure a long-term sustainable supply. Constraints on supply
include drought cycles, limitations on surface water allocations and risk of seawater
intrusion of the aquifer system.
A key water supply planning and management activity started in late 2013 by the NCMA
is the initiation of joint Strategic Planning efforts for the purpose of providing the NCMA
Technical Group with a framework for identifying common water resource planning goals
and objectives, and to establish a 10-year work plan for implementation of those efforts.
Several key objectives have been identified, including water supply reliability, increased
outreach, and basin management. These efforts will continue throughout 2014.
The deepening pumping depression within the NMMA and expansion of the groundwater
depression to the west and north, towards the NCMA, appears to have eliminated the
historical groundwater divide between the NCMA and NMMA. With the loss of this
divide there has been a reversal of groundwater gradients and the development of a
landward gradient in the southern portion of the NCMA. This landward gradient
eliminates the historic recharge volume of subsurface inflow into the NCMA (thereby
reducing the yield of the aquifer), and creates conditions favorable for seawater intrusion
in the NCMA and NMMA. To mitigate the risk of seawater intrusion and restore the
subsurface inflow into the aquifer, immediate conservation measures must be made to
reduce demand in the NMMA. Additionally, the County of San Luis Obispo, which
possesses land use authority, must restrict any future development that increases water
demand in the NMMA.
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2.0 INTRODUCTION
2.1 INTRODUCTION
This report summarizes hydrologic conditions during the calendar year 2013 in the
Northern Cities Management Area (NCMA) of the Santa Maria Groundwater Basin (SMGB) in
San Luis Obispo County, California. This report was prepared on behalf of four public agencies
collectively referred to as 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 (Oceano CSD). These agencies, along with local land
owners, the County of San Luis Obispo (County), and the San Luis Obispo County Flood Control
& Water Conservation District (SLOFCWCD) 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 collaborative approach was formalized in the 2002 Management Agreement between
the Northern Cities, Northern Landowners, and Other Parties, and incorporated in the 2005
Settlement Stipulation for the Santa Maria Groundwater Basin Adjudication (Stipulation). On June
30, 2005 the Stipulation was agreed upon by numerous parties, including the Northern Cities.
The “Settlement Agreement” attached to the Stipulation included the Management Agreement of
2002. The approach was then 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) has upheld the Court’s Judgment. Most recently, the Supreme Court of California denied a
petition to review the decision on February 13, 2013.
The Judgment orders the stipulating parties to comply with all terms of the Stipulation.
The 2002 Settlement Agreement is generally affirmed as part of the Judgment and its terms
incorporated into the Stipulation. However provisions of the Stipulation supersede the 2002
Settlement Agreement in the areas of continuing jurisdiction, groundwater monitoring and
reporting. As specified in the Judgment and as outlined in the Monitoring Program for the
Northern Cities Management Area (Monitoring Program, Todd 2008), the Northern Cities
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 developed water supplies; and,
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 Northern Cities agencies
(including necessary field work), requests to other public agencies, and from online sources.
Periodic reports such as Urban Water Management Plans (UWMP) prepared by the Cities of
Arroyo Grande, Grover Beach and Pismo Beach provide information on demand, supply, and
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water supply facilities. Annual data are added to the comprehensive Northern Cities Management
Area Database (NCMA DB) and analyzed. Results of the data compilation and analysis for
calendar year 2013 are documented and discussed in this Annual Report.
As shown on Figure 1, the Northern Cities Management Area (NCMA) represents the
northernmost portion of the Santa Maria Groundwater Basin, as defined in the adjudication and by
California Department of Water Resources (DWR 1958) as the Santa Maria River Valley
groundwater basin (Basin 3-12). Adjoining the NCMA to the southeast is the Nipomo Mesa
Management Area (NMMA); the Santa Maria Valley Management Area (SMVMA) encompasses
the remainder of the groundwater basin. Figure 2 shows the locations of the four Northern Cities
agencies within the NCMA.
2.2 BACKGROUND
2.2.1 Description of the Northern Cities Management Area Technical Group
The NCMA Technical Group (TG) is composed of representatives of Arroyo Grande,
Grover Beach, Pismo Beach, and Oceano CSD (Table 1).
Table 1. NCMA TG Representatives
Agency Representative
City of Arroyo Grande Teresa McClish
Director of Community Development
City of Arroyo Grande Shane Taylor
Utilities Services Supervisor
City of Grover Beach Gregory A. Ray, PE
Director of Public Works/City Engineer
City of Grover Beach R.J. (Jim) Garing, PE
Consulting City Engineer for Water and
Sewer
City of Pismo Beach Benjamin A. Fine, PE
Director of Public Works/City Engineer
Oceano Community Services District Tony Marracino
Utility Systems Supervisor
The TG contracts with a consulting firm to serve as staff extension to assist the TG in all
functions of the roles and responsibilities of the TG for purposes of managing the water supply
resources. The TG also contracts with a consulting firm to conduct the quarterly groundwater
monitoring and sampling tasks, evaluate water demand and available supply, identify threats to
water supply, and assist the group in preparation of the Annual Report.
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2.2.2 Coordination with Management Areas
Since 1983, management of the NCMA has been based on cooperative efforts of the four
Northern Cities agencies with ongoing collaboration with San Luis Obispo County, the
SLOFCWCD, and other local and state agencies. Specifically the NCMA agencies have limited
their pumping and, in cooperation with SLOFCWCD, invested in surface water supplies so as to
not exceed the safe yield of the NCMA portion of the Santa Maria Valley groundwater basin
(SMGB). Other organizations participate as appropriate to the issues of the time. In addition to
the efforts discussed in the report, cooperative management occurs through many means
including communication of the Northern Cities 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 2007 San Luis
Obispo County Integrated Regional Water Management Plan (IRWMP), and are participating in
the ongoing IRWMP update efforts. 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 has taken the lead in cooperative management of its
management area. The NCMA has also been a proactive participant in the Santa Maria
Groundwater Basin Management Area technical subcommittee, which formed in 2010. These
efforts continued throughout 2013. The NCMA Technical Group met monthly (at a minimum)
throughout 2013. The group also met four times with the NMMA and SMVMA groups. The
coordination among the management areas is leading to joint projects such as enhanced
monitoring of groundwater levels and improved sharing of data.
A key water supply planning and management activity started in late 2013 by the NCMA is
the initiation of joint Strategic Planning efforts for the purpose of providing the NCMA Technical
Group with a framework for identifying common water resource planning goals and objectives,
and to establish a 10-year work plan for implementation of those efforts. Several key objectives
have been identified, including water supply reliability, increased outreach, and basin
management. These efforts will continue throughout 2014.
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3.0 BASIN DESCRIPTION
3.1 SETTING
The Santa Maria Groundwater Basin, as defined in the adjudication and as defined by the
Department of Water Resources (DWR 1958) as the Santa Maria River Valley groundwater basin
(Basin 3-12), generally has three hydrologic elements. As shown in Figure 1 (following text), the
Northern Cities Management Area (NCMA) represents the northernmost portion of the Santa
Maria Groundwater Basin. Adjoining the NCMA to the southeast is the NMMA, while the Santa
Maria Valley Management Area encompasses the remainder of the groundwater basin.
Groundwater pumped from the NCMA is derived from the Paso Robles Formation
comprising heterogeneous alluvial materials that extend westward at depth beneath the ocean.
The northern and eastern portions of the basin are bounded by bedrock and faults that potentially
reduce groundwater recharge by underflow. The southern boundary of the NCMA is coincident
with the NMMA portion of the Santa Maria Groundwater Basin and historically has been
considered a groundwater divide and source of recharge (DWR 2002).
The groundwater resource developed in the NCMA has several sources of recharge:
precipitation, seepage from stream flow, and underflow from adjacent areas. In addition, some
return flow occurs from imported surface sources: Lopez Reservoir and the State Water Project.
Groundwater gradients show that discharge occurs from the groundwater basin in the NCMA area
to the ocean. As discussed in Section 4.1, this discharge and positive westward gradient controls
the risk of seawater from entering the production zones of the basin aquifer.
3.2 CLIMATE
Each year climatological and hydrologic (stream flow) data for the NCMA are added to the
NCMA database. Annual precipitation from 1950 to 2013 is presented on Figure 3. Monthly
rainfall and evapotranspiration (ET) for 2013 as well as average monthly historical rainfall and ET
are presented on Figure 4.
3.2.1 Precipitation
Historical rainfall data have been compiled on a monthly basis for the following four
stations:
National Oceanic and Atmospheric Administration (NOAA) Pismo Beach Fire Station
(Coop ID: 46943) for 1949 to Present;
DWR California Irrigation Management Information System (CIMIS) Nipomo Station (No.
202) for 2006 to Present;
Desert Research Institute (DRI): Western Regional Climate Center Pismo Station for 1950
to Present; and,
San Luis Obispo County-operated rain gage in Oceano for 2005 to 2009.
Based on the acquired data for the four rainfall stations listed above, the average rainfall
for calendar year 2013 was 4.32 inches, equal to 27 percent of the long-term average annual
rainfall for the NCMA.
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Below average rainfall occurred for eight of the twelve months (67 percent of year; Figure
4). Most rainfall typically occurs from November through April. The year 2013 was marked by
substantially lower than average rainfall (21 percent of normal) in the “wet” months of January,
February, March, April, November, and December.
Average precipitation data is presented on Figure 3 for the period of 1950 through 2013 on
a calendar year basis. Annual average rainfall for the NCMA for the period is approximately 16.1
inches. Figure 3 illustrates annual rainfall and exhibits several multi-year drought cycles (e.g., 7
years, 1984-1990) followed by cycles of above average rainfall (e.g., 8 years, 1991-1998). With
the exception of 2010, the period 2006 through 2013 (8 years) has experienced below average
annual rainfall suggesting a “dry” hydrologic period. The average rainfall 2006 through 2013
(including 2010) is 10.3 inches, 64 percent of the long-term average.
3.2.2 Evapotranspiration
The California Irrigation Management Information System (CIMIS) maintains weather
stations in locations throughout the state in order to provide real time wind speed, humidity and
ET data. Two CIMIS stations are located near the NCMA; Nipomo and San Luis Obispo. The
Nipomo and San Luis Obispo stations have gathered data since 2006 and 1986, respectively.
Monthly ET data for the Nipomo station are presented on Figure 4 for 2013 and average (7-years)
conditions. ET rate affects recharge potential of rainfall and the amount of outdoor water use
(irrigation). In all months, ET exceeded rainfall, indicating the recharge to groundwater from direct
precipitation in 2013 was likely nonexistent.
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4.0 WATER SUPPLY AND DEMAND
4.1 WATER SUPPLY
Section 4.1 provides an overview of NCMA water supply sources, presents groundwater
conditions that occurred in 2013, and discusses threats to water supply.
4.1.1 Sources of Supply
The NCMA water supply consists of three major sources: Lopez Lake, the State Water
Project Coastal Branch, and groundwater. Each source of supply has a defined delivery volume
which varies from year to year based on a number of factors. Both supply and demand are
discussed below; demand is discussed in more detail in Section 4.2.
4.1.1.1 Lopez Lake
Lopez Lake and Water Treatment Plant is operated by SLOFCWCD Zone 3, provides
water to all four agencies in the NCMA, and releases water to Arroyo Grande Creek for habitat
conservation and agricultural purposes. The 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 has been apportioned by agreements to contractors including each of the
Northern Cities plus County Service Area (CSA) 12 (in the Avila Beach area). Zone 3 allocations
are summarized in Table 2. Of the 8,730 AFY safe yield, the remaining 4,200 AFY is used for
downstream releases to maintain flows in Arroyo Grande Creek and provide groundwater
recharge.
Table 2. Zone 3 Contractors Water Allocation (AFY)
Contractor Water Allocation,
(AFY)
City of Arroyo Grande 2,290
City of Grover Beach 800
City of Pismo Beach 896
Oceano CSD 303
CSA 12 (not in NCMA) 241
Total 4,530
Downstream Releases 4,200
Safe Yield of Lopez Lake 8,730
Source: SLOFCWCD, Zone 3 UWMP 2005 Update
In the past, when management of releases resulted in a portion of the 4,200 AFY
remaining in the reservoir, the water was offered to the contractors as surplus water. Surplus
water was available in 2013, resulting in the delivery of 2,715 AF of surplus water from Lopez
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Lake to the NCMA agencies. Total discharge from Lopez Lake in 2013 was 9,428.9 acre feet
(AF), of which 5027.3 AF was delivered to NCMA contractors, 123.3 AF delivered to CSA 12, and
4,278.3 AF was released downstream to maintain flow in Arroyo Grande Creek (individual
deliveries are shown in Table 3).
Table 3. 2013 Lopez Lake Deliveries (AF)
Agency
2013 Allocation
Usage (AF)
2013 Surplus Usage
(AF)
2013 Total Lopez
Lake Water Delivery,
(AF)
City of Arroyo Grande 1,188.1 1,534.2 2,722.3
City of Grover Beach 266.7 536.0 802.7
City of Pismo Beach 857.1 600.3 1,457.4
Oceano CSD 0 44.9 44.9
Total NCMA 2013 Usage 2,311.9 2,715.4 5,027.3
CSA 12 (not in NCMA) 0 123.3 123.3
Downstream Releases 4,278.3 -- 4,278.3
Total 2013 Lopez Lake Deliveries 9,428.9
During April maintenance work was performed on the Lopez Lake Pipeline. During that
period no deliveries were made. As discussed below, groundwater was used to make up the lost
supplies.
4.1.1.2 State Water Project
Pismo Beach and Oceano CSD have contracts with SLOFCWCD to receive water from
the State Water Project (SWP). The SLOFCWCD serves as the SWP contractor, providing the
imported water to local retailers through the Coastal Branch pipeline. Pismo Beach and Oceano
CSD have contractual water delivery allocations (commonly referred to as “Table A” water) of
1,240 AFY and 750 AFY, respectively (see Table 4, page 10). In addition to its Table A
allocation, Pismo Beach holds 1,240 AFY of additional allocation with SLOFCWCD. The
additional allocation held by Pismo Beach (usually referred to as a “drought buffer”) is available to
augment requests when the state-wide SWP allocations are insufficient to meet local needs. This
“drought buffer” is an additional amount that the SLOFCWCD holds in excess of the contracted
amount that can be delivered when there is a reduced delivery; however the total of water
delivered between the base contractual allocation and drought buffer cannot exceed 1,240 AF in
any given year. In addition, the drought buffer allocation is also reduced by the percent delivery
set by DWR and so may not allow Pismo Beach full deliveries of 1,240 AFY in years when
deliveries are less than 50%.
On November 29, 2012, in response to state-wide drought in SWP source areas, the initial
allocation to SWP contractors for 2013 was set at 30 percent of Table A contractual allocation
amounts. On December 21, 2012 the allocation amounts were increased to 40 percent, then
subsequently decreased to 35 percent on March 22, 2013 based on the amount of water in SWP
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facilities and expected operational constraints in the Delta. As a result Pismo Beach and Oceano
CSD modified their planning to maximize their SWP deliveries. Oceano CSD accepted 35% of
their 750 AF allocation and purchased additional water from the SLOCFCWCD and a new State
program allowing purchase of carryover water held in San Luis Reservoir. In 2013, Pismo Beach
took actual delivery of 618 AF and Oceano CSD took delivery of 750 AF, for a total delivery of
1,368 AF of SWP water to NCMA (Table 9, page 25).
4.1.1.3 Groundwater
Each of the NCMA agencies have established groundwater supplies using wells which
draw from developed aquifers in the northern portion of the NCMA. Groundwater also satisfies
applied irrigation and rural uses in the NCMA. Groundwater use in the NCMA is governed by the
Judgment and the 2002 Settlement Agreement which establishes that groundwater will continue
to be allotted and independently managed by the “Northern Parties” (Northern Cities, NCMA
overlying owners, and the SLOFCWCD).
A safe yield value of 9,500 AFY for the NCMA groundwater basin was cited in the 2002
Groundwater Management Agreement among the Northern Cities with allotments for applied
irrigation (5,300 AFY), subsurface outflow to the ocean (200 AFY), and urban use (4,000 AFY).
The Management Agreement’s safe yield allotment for urban use was subdivided as follows and
as shown in Table 4:
City of Arroyo Grande: 1,202 AFY
City of Grover Beach: 1,198 AFY
City of Pismo Beach: 700 AFY
Oceano Community Services District: 900 AFY
According to Todd (2007), the Groundwater Management Agreement’s subdivision for
applied irrigation is higher than the actual applied irrigation groundwater use and the amount
designated for subsurface outflow is unreasonably low. Since anticipated agriculture expansion is
not significant and long term increased use is unlikely, the current balance of water use between
agriculture and municipal uses has been sustainable for the last 40 years.
Maintenance of subsurface outflow along the coast is essential to preventing seawater
intrusion. While the minimum subsurface outflow needed to prevent seawater intrusion is
unknown, a regional outflow on the order of 3,000 AFY has been estimated as a reasonable
approximation (Todd, 2007).
The 2002 Management Agreement provides that allotments of the various urban parties
can be increased when land within the corporate boundaries is converted from agricultural uses to
urban uses, referred to as an agricultural conversion credit. Agricultural credits for the cities of
Arroyo Grande and Grover Beach did not change from 2011. The agricultural credit for 2013 for
Arroyo Grande and Grover Beach remain unchanged from 2012 and are 121 AFY and 209 AFY,
respectively, for a total of 330 AFY (Table 4).
4.1.1.4 Developed Water
As defined in the Stipulation, “developed water” is “Groundwater derived from human
intervention” and includes “Lopez Lake Water, Return Flow, and recharge resulting from storm
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water percolation ponds.” Return flow results from deep percolation of water used in irrigation
that is in excess of plant needs and from outdoor uses of Lopez Lake and SWP deliveries. These
return flows have not been recently estimated, but would be considered part of the groundwater
basin yield.
In 2008, the cities of Arroyo Grande, Grover Beach, and Pismo Beach prepared storm
water management plans. The cities currently are working with the Central Coast Regional Water
Quality Control Board to address local storm water quality issues. In order to control storm water
runoff, each City anticipates construction of retention or detention ponds associated with new
development that may provide groundwater recharge. During 2013, no new ponds were installed
in the NCMA and no new data were available, so previous estimates of recharge were used in
this report. Estimated recharge values should be updated and refined as new recharge facilities
are installed and as additional information on flow rates, pond size, infiltration rates, and tributary
watershed area becomes available.
Construction of recharge basins or other means to increase groundwater recharge could
substantially augment the yield of the groundwater basin and thus warrant provision of recharge
credits to one or more of the Northern Cities. Pursuant to the Settlement Agreement, recharge
credits would be based on a mutually-accepted methodology to evaluate the amount of recharge
which would involve quantification of such factors as Lopez Lake and State Water recharge,
storm water runoff amounts, determination of effective recharge under various conditions, and
methods to document actual recharge to developed aquifers.
4.1.1.5 Water Use by Supply Source
Table 4 summarizes the water supplies currently available to the Northern Cities, including
Lopez Lake allocation, SWP allocations, groundwater allotments, and agricultural credits. In
addition to direct available supplies, the Lopez water year 2013-14 was the final year of a 5-year
agreement between Arroyo Grande and Oceano CSD for the temporary purchase of groundwater
or Lopez Lake supplies. No transfers were completed in Calendar Year 2013. The final transfer
was completed in January 2014, therefore is not reflected in this report. The category of “Other
Supplies” includes groundwater pumped from outside the NCMA boundaries.
A graphical depiction of the water use sorted by supply source for each NCMA agency
since 1999 is presented as Figure 5. The graphs depict changes in water supply availability and
use over time, including the increased use of SWP water (to a maximum in 2001). The figure also
indicates the reduced and less variable Lopez Lake water use due to the unavailability of Lopez
Lake surplus flows from 2002 to 2008. Although no recycled water was available in 2013, plans
have been developed to construct recycled water facilities (see Section 6.2.5).
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Table 4. Available Urban Water Supplies, 2013 (AFY)
Urban
Area
Lopez Lake SWP
Allocation
Groundwater
Allotment
Ag
Credit
Temporarily
Purchased
Other
Supplies
Total
Arroyo
Grande 2,290 0 1,202 121 0 160 3,773
Grover
Beach 800 0 1,198 209 0 0 2,207
Pismo
Beach 896 1,240 700 0 0 0 2,836
Oceano
CSD 303 750 900 0 0 0 1,953
Total 4,289 1,990 4,000 330 0 160 10,769
Figure 6 shows total NCMA water use for each supply source, including Lopez Lake,
SWP, and groundwater. As shown, the full amount of Lopez Lake supply (4,289 AFY) is currently
used (augmented by surplus water as available). In 2001 through 2003, SWP supplies (1,850
AFY) were used to the maximum extent. From 2004 to 2008, SWP use decreased to just over
1,100 AFY, mostly reflecting a partial shift by Pismo Beach from SWP to groundwater supply.
This changed in 2009 and 2010 when Pismo Beach increased SWP use and significantly
decreased groundwater use to provide a more economical water supply and to ease the burden
on the groundwater basin during the drought (see Figure 5). In 2013 Pismo Beach took delivery
of 618 AF of SWP water (50% allocation) and pumped 73.01 AF from the groundwater basin. In
2013 Oceano CSD took delivery of 750 AF of SWP water (100% allocation) and pumped 92.84
AF from the groundwater basin.
Total NCMA groundwater use is shown in Table 5 (following page) and Figure 6.
Estimated applied irrigation and rural uses are added to the urban uses detailed in Table 5 and
Figures 5 and 6. From 1999 through 2013, total estimated groundwater use averaged
approximately 5,087 AFY and exceeded 6,000 AFY in 2007 and 2008. With an estimated safe
yield of 9,500 AFY, the remaining groundwater represents storage and outflow to the ocean, an
unknown but major portion of which is needed to repel seawater intrusion.
Groundwater pumpage reached a peak in 2007, and then declined in 2008, 2009, and
2010. Since 2010, although there has been a slight but steady increase in pumpage every year,
overall groundwater use has remained significantly lower than historic annual pumpage rates. In
2013, urban groundwater use increased 25%, from 1,138 in 2012 to 1,423 AF. Although urban
groundwater pumpage has been slowly increasing the past few years, it still remains significantly
below the 4,000 AFY allotment.
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Table 5. Groundwater Pumpage (AF)
Agency 2013 Groundwater Use
(AF)
City of Arroyo Grande 268.4
City of Grover Beach 988.8
City of Pismo Beach 73.0
Oceano CSD 92.8
Total Urban Groundwater Use 1,423.0
Applied Irrigation 2,742.0
Rural Water Users 41.7
Total Groundwater Use 4,206.7
4.1.2 Groundwater Conditions
The NCMA groundwater monitoring program includes: 1) compilation of groundwater
elevation data from San Luis Obispo County, 2) water quality and groundwater elevation
monitoring data from the network of sentry wells in the NCMA, 3) water quality data from the
California Department of Public Health (DPH), and 4) groundwater elevation data from municipal
pumping wells. Analysis of this data is summarized below in accordance with the July 2008
Northern Cities Monitoring Program.
4.1.2.1 Groundwater Monitoring Network
Approximately 145 wells within the NCMA were monitored by the County at some time
during the past few decades. The County currently monitors 38 wells on a semi-annual basis
(April and October), including five “sentry well” clusters (piezometers) located along the coast and
a newly constructed monitoring well (County Well #3) along the boundary between the NCMA and
NMMA (Figure 7). The County monitors more than 70 additional wells in southern San Luis
Obispo County. Following the findings of the 2008 Annual Report, the Northern Cities initiated a
quarterly sentry well monitoring program to supplement the County’s semi-annual schedule. The
quarterly monitoring well measurements include County Well #3.
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;
Detailed location information must be available;
The wells should have a wide geographic distribution; and,
The historic 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 and may be screened in various producing zones. Moreover,
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many of the wells are active production wells or located near active wells and thus are subject to
localized pumping effects that result in measurements that are lower than the “static” or more
broadly representative water level. These effects are not always apparent at the time of
measurement. As a result, the data cannot easily be identified as representing static groundwater
levels in specific zones (e.g., unconfined or deep confined). Hence, the data should be
considered as a whole in developing a general representation of groundwater conditions.
The “sentry wells” are a critical element of the groundwater monitoring network and
provide an early warning system to identify and quantify potential seawater intrusion episodes in
the basin (Figure 7). Each sentry well consists of a cluster of multiple wells allowing for the
measurement of groundwater elevation and quality from discrete depths. Also shown on Figure 7
is the Oceano CSD Observation well cluster, a dedicated monitoring well cluster located just
seaward of Oceano CSD production wells 7 and 8. Figure 8 shows the depth and well names of
the sentry well clusters and the Oceano CSD observation well cluster.
The wells are divided into three basic depth categories: shallow, intermediate, and deep.
Since initiation of the sentry well monitoring program, 20 quarterly events have been conducted
with one each in May, August, and October 2009, and winter, spring, summer and fall 2010
through 2013, as well as January 2014 (the January 2014 data will be included in the 2014 annual
report). These monitoring events include collection of synoptic groundwater elevation data and
water quality samples for laboratory analysis.
4.1.2.2 Groundwater Levels
Groundwater elevation data is gathered from the network of wells throughout the NCMA.
Water level measurements in these wells were used to monitor effects of groundwater use,
groundwater recharge, and as an indicator of risk of seawater intrusion. Analysis of these
groundwater elevation data has included development of groundwater surface contour maps,
hydrographs, and an index of key sentry well water levels over time (Figures 9 through 13).
Contoured groundwater elevations for the Spring (April 2013) and Fall (October 2013)
monitoring events, including data from the County of San Luis Obispo monitoring program, are
shown on Figures 9 and 10. Figure 9 shows the Spring 2013 groundwater elevations were
highest in the eastern portion of the NCMA and approximately 5 feet above sea level along the
shore line. Of note is the development of a possible westward-facing trough that developed in the
Spring in the northern part of the area, apparently in response to municipal pumping in the Arroyo
Grande and Grover Beach area. A comparison with Spring 2012 contours shows that Spring
2013 water levels were generally 10 to 15 feet lower throughout the NCMA.
Groundwater elevations in October 2013 (Figure 10) were again highest in the eastern
portion of the NCMA. Water level elevations were approximately 2 to 5 feet above sea level along
the shoreline. Groundwater elevations were generally above mean sea level (msl) throughout the
NCMA during the October monitoring event, with the exception of some measurements in
agricultural wells in the east-central part of the area where water level elevations were measured
as deep as -6.7 feet msl. These lower water level elevations create and maintain the previously
recognized depression in the water table in the so-called “pumping trough,” located south of the
municipal well fields and in the vicinity of, and south of, lower Arroyo Grande Creek. Water
elevations in this area are generally 5 to 10 feet lower than levels measured in Fall 2012.
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Figure 11 shows hydrographs of selected wells from the County well monitoring program,
illustrating long-term changes in groundwater levels in the NCMA. To provide geographic context,
hydrographs from two wells located just east of the NCMA in the NMMA are also presented.
The hydrographs for wells 32D03 and 32D11, and wells 31H08 and 31H09 (Figure 11) are
paired hydrographs for wells south of and in the vicinity of the municipal well fields. Depending on
duration of pumping of the municipal wells, water levels in these wells have historically been
below levels in other areas of the basin for prolonged periods of time. Although the data sets are
incomplete, the hydrographs show that, historically, groundwater elevations in these wells have
generally been above mean sea level. However, an area of lower groundwater elevations
(“trough”) beneath the active well field appeared during the period of reduced rainfall in 2007 and
2008. Although the presence of the trough has been relatively persistent, the water levels in this
area have remained above sea level.
Prior to 2013, groundwater elevations throughout the area recovered from the 2007-2008
lows and remained at levels similar to 2006 (a wet year). However, the very low rainfall year of
2013 resulted in water levels throughout the area declining 5 to 10 feet.
The sentry well clusters are the 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 12), the sentry wells provide a long history of groundwater elevations. The deepest wells
in the clusters (wells 24B03, 30F03, and 30N02) are screened at depths closely matching the
screened depths of most local pumping wells. Hence, measured water elevations in these
deepest wells reflect the net effect of changing groundwater recharge and discharge conditions in
the primary production aquifer.
Averaging the groundwater elevations from these three deep sentry wells provides a
single, representative index for tracking the status and apparent health of the basin. Historical
variation of this index is represented by the average deep sentry well elevations on Figure 13.
Figure 13 clearly shows three years of drought (2007-2009) followed by recovery of the index
values in subsequent years as rainfall increased and pumpage declined. The graph shows that
the index values improved significantly since 2008 and remained above the 7.5-foot index until
late April 2013.
In April 2013 municipal groundwater pumpage was increased to replace temporarily
unavailable supplies from Lake Lopez. As a result, the groundwater level in Sentry Well 30F03
declined by as much as 14 feet in 7 days and was below sea level for a total of 6 days (Figure
16). The rather dramatic decline in water level due to increased pumpage required almost two
weeks to recover to the initial water levels observed prior to the increased pumping. Similar water
level declines, albeit of less magnitude, were also observed in deep wells 24B03 and 30N02
(Figures 15 and 17, respectively).
To provide more detail regarding seasonal and other groundwater level changes in the
area between the NCMA and NMMA, detailed water level monitoring of well 32C03 was initiated
in April 2012 and monitored throughout 2013. A sensor was installed to document long- and
short-term changes in water level, temperature and electrical conductivity (EC). The acquired
data indicates that water levels in Well 32C03 fluctuate on a daily basis by as much as one foot.
The water level in well 32C03 declined between April 2012 (when the transducer was installed)
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and September 2012 by 15 feet, then increased by 10 feet through February 2013. From
February 2013 to early October 2013, water levels declined by about 15 feet. Since October
2013, water levels in the well increased about 6 feet; the most recent measurement in January
2014 shows a water level elevation of 6.7 feet (NAVD88).
The water levels in the deep sentry wells at the four coastal locations (24B03, 30F03,
30N02, and 36L02) range from 1.33 feet to 7.52 feet lower at the end of 2013 than the water
levels measured in January 2013 (Figures 15 through 17, Appendix A).
As discussed earlier, the average elevation of the three deep wells has been used as a
representative index of water levels in the main production zones. As shown on Figure 13, the
index reflects both seasonal pumping and annual variations in the relationship between recharge
and discharge. In October 2013 the average water elevation in the representative key wells was
6.31 feet, which is 1.19 feet below the adjusted “index” of 7.5 feet NAVD88. By the end of 2013,
the average water elevation in the three-well index increased to 8.14 feet, which is above the
index of 7.5 feet by 0.64 feet.
As shown on Figure 13, the index remained below 7.5 feet between October 2007 and
August 2009. The index water level increased to 7.37 in October 2009 and 9.65 in January 2010.
As discussed in previous annual reports and shown in Figure 13, high levels of chloride (and
sodium) in wells 30N02 and 30N03 occurred between May 2009 and January 2010. This
relationship implies a lag in time between lowered water levels in the deep sentry wells and
significant increases in sodium and chloride. This is potentially significant because Figure 13
shows that during April 2013 the calculated index level was as deep as 6 feet below the index
value of 7.5 and remained at or below the index from early June 2013 until mid-December 2013.
Furthermore, the water level elevation in Well 30F03 was below sea level for 6 days in late April.
Continued average values below the index create a potential environment for increased risk of
sea water intrusion.
Additional observations include:
Water levels in the deep sentry wells reached their lowest level in 2012 in September of
that year; the lowest levels observed in 2013 were observed in October.
Water levels in the deep sentry wells reached their highest levels of 2013 in February.
From February to late November, water levels declined steadily; water level elevations in
all the deep wells started increasing from late November 2013 through the end of the year.
Water levels in the deep wells showed significant effects of short-term increased local
groundwater extraction in late April. Full recovery of the water levels following cessation
of the short-term increased pumping did not occur until early June.
Although it is encouraging that the index value ended the year above the index, February
through April is the time of year that is historically the highest value (at least since January
2010). The index value at the end of 2013 is 2 to 4 feet lower than the end of year levels
of 2010 through 2012. If the wells experience a 1-foot rise through February to April
followed by a 5-foot decline in water level elevations until October 2014 (as is typical in
past years), then the index value may potentially be as low as 4 feet in October 2014.
Considering the effects of any increased pumpage related to anticipated cutbacks in
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surface water deliveries, the index level may approach the level seen in 2008-2009, just
prior to observing the elevated chloride concentrations in the Pier Avenue well.
4.1.2.3 Water Quality
Water is used in several ways in the NCMA, each use requiring a certain minimum water
quality. Since contaminants from seawater intrusion or anthropogenic sources can potentially
lower the quality of water in the basin, water quality is monitored at each of the sentry well
locations in the NCMA and at County Monitoring Well #3.
Four separate monitoring events occurred in 2013, with each piezometer in the sentry
wells and in the Oceano CSD wells measured in January, April, July, and October 2013. During
each event, the wells were all sampled in accordance with ASTM International Standard D4448-
01. The water quality data from these events and available historical data from these wells are
presented in Appendix A. Because water quality trends are used to monitor for seawater
intrusion, data collected in 2013 were added to previous data and the variation of selected
constituents were plotted against time. Figures 19 and 20 show variation of chloride and TDS
concentration, respectively, since 2009.
The historic water quality data presented in Appendix A shows that water quality varied,
sometimes widely, during the years 2009 through 2012. However, samples obtained in 2013
show very little change (variation) throughout the year and a general improvement in overall
quality compared to 2009 (Figure 21). The NCMA 2009 Annual Monitoring Report suggested the
observed historic variation in water quality data could be due to a number of factors, including
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. Changes in groundwater demand since 2009 and abundant rainfall in 2010-11 may have
contributed to groundwater quality becoming relatively stable in the past few years.
With the exception of shallow Wells 24B01 and 30N01, the 2013 data indicate no
significant change compared to recent past measurements. Well 24B01 continues to show higher
levels of TDS, chloride and sodium than the other wells in the monitoring network, and the data
indicate a slight decrease in TDS and chloride but no change in sodium since the start of the year.
TDS and sodium decreased slightly in 2013.
A second shallow well, Well 30N01, shows a slight increase in TDS, sodium and chloride
compared to the previous year. Water quality results in the well continue to exhibit concentration
levels of TDS, chloride and sodium more in the range of other sentry wells.
Sentry well cluster 32S/13E 30N (Pier Avenue) is located west of Highway 1 in Oceano
and includes three piezometers. This sentry well cluster is just south of the “pumping trough”
recognized in April 2013, and within the area of broad lowering of the water table recognized in
October 2013 (Figures 9 and 10). The deep and intermediate level piezometers at this location
showed low groundwater levels in 2008 and 2009 (NCMA 2008 and 2009 Annual Monitoring
Reports, respectively). Data from this sentry well cluster was interpreted to indicate localized
seawater intrusion affecting the deep zone (30N02) and, to a lesser extent, the middle zone
(30N03) in 2009. Thus, water quality in the 30N well cluster is considered a key indicator of
potentially encroaching seawater intrusion.
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Data collected in 2010 from piezometers 30N03 and 30N02 show geochemical signatures
of seawater intrusion on Schoeller geochemical plots (Figures 21 and 23, respectively). The
Schoeller diagrams shown on Figures 21 through 25 are graphical representations of common
cation and anion concentrations in water expressed in milliequivalents per liter (meq/l). Because
several samples may be plotted on the same graph, variation in hydrogeochemical water
characteristics may be easily recognized. This approach allows graphical, or visual, means to
evaluate measured water quality against potential water sources. Each line of connected points
illustrates the water quality signature from a specific well (e.g., 30N03, Figure 21) for a given
sample period. For comparison, the Schoeller diagrams included here also show the typical
geochemical signature for seawater (in black) and the typical signature for a groundwater basin
water supply well (labeled “GW Base”, in blue). Most of the water quality samples plotted on the
lower portion of the diagram are similar in shape to the groundwater basin sample and are
combined within the shaded area.
After the period of lower water level in the index wells in 2007 and 2008, wells 30N02 and
30N03 exhibited increased TDS, sodium and chloride in samples collected in 2009 (Figures 21
and 23). Beginning in 2010, both wells have shown lower TDS, sodium and chloride as well as a
more narrow range in chemical variation (Figures 22 and 24). TDS, sodium and chloride values
in the 2013 Q4 samples from both 30N02 and 30N03 showed only nominal changes compared to
the previous year.
The samples taken from the shallow completion well in this cluster (Well 30N01) continues
to show somewhat elevated sodium and chloride; however it appears not to indicate sea level
intrusion of the deeper levels that are screened in the groundwater production zone. This
conclusion is based on the following related observations:
The well is shallow (screened from 15 to 40 feet), located near a coastal lagoon, and may
be influenced by periods of high sea level or seasonal stagnation.
None of the deeper wells at any of the sentry well locations show high levels of TDS,
sodium and chloride (indications of sea water intrusion).
Water levels of all deep wells generally exhibit a greater seasonal range than Well 30N01.
Compared to 2011, levels of TDS and most other measured water quality parameters
declined through July 2012. Since then, these parameters have remained relatively stable
as of the end of 2013.
The shallow well in sentry well cluster 32S/12E 24B has historically contained brackish
water. This sentry well is located in the northwestern corner of the basin in Pismo Beach. The
shallow well (24B01) shows a similar geochemical signature (albeit muted) to that of seawater
(Figure 25). Water samples from this well historically have shown high sodium and chloride
concentrations. While these data have been interpreted by the California Department of Water
Resources to be the result of a solution of residual marine and evaporative salts indigenous to the
geologic environment in this part of the basin, it may be because the well is located near the
lagoon at the mouth of Pismo Creek and is subject to storm surge and local flooding during storm
and high sea conditions. The water sample from the shallow piezometer (24B01) showed
elevated Cl and Na in October 2010 and all quarterly samples taken in 2011, 2012, and 2013
while samples from the two deeper piezometers had TDS, Cl, and Na levels that indicate no such
effect.
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These various water quality indicators described above suggest that the local
interface/mixing zone between seawater and fresh groundwater remains seaward of the sentry
wells. The location of the seawater interface is not known due to the heterogeneity of the aquifer.
The only indication of the location of the interface would be when one or more monitored wells
show an increase in TDS along with a geochemical signature resembling seawater. Based on
experience in the NCMA, retreat of the interface may be reversed, and again become shoreward,
if seaward gradients are reduced or reversed. These changes may be brought on by reduced
recharge (e.g. drought conditions) or if pumping exceeds available groundwater supply, or both.
Well 32C03 (County monitoring well #3) is located south and east of the main NCMA
groundwater development area. It has exhibited little change compared to the initial sample taken
in April 2012. Water in well 32C03 exhibits lower calcium, magnesium, and carbonates than all
other wells and has a higher ratio of Na+Cl to CA+Mg+Carbonate.
4.1.3 Threats to Water Supply
Because the NCMA depends 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 NCMA water supply similarly include extended
drought and climate change that may affect the yield from Lopez Lake as well as reduced
recharge to the NCMA (northern portion of the Santa Maria Groundwater Basin). In addition, the
NCMA is not hydrologically isolated from the rest of the Santa Maria Groundwater Basin, and
increased growth and excessive pumping on the Nipomo Mesa have contributed to a deepening
groundwater depression underlying the NMMA.1 In addition, there is a potential impact from
seawater intrusion if the groundwater system as a whole is not adequately monitored (as
discussed in the above section) 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 as well as an ongoing imbalance between pumping and recharge in the NMMA (NMMA
Technical Group. 2011). The ongoing drought has resulted in a lowering of groundwater levels
throughout the NCMA, most notably in the agricultural production area and the upgradient
(eastern) area represented by County Monitoring Well 3 (32-C).
4.1.3.1 Threats to State Water Project Supply
Both extended drought and long-term reduction in snowpack due to climate change can
affect deliveries from the State Water Project. California is entering the third year of a drought
that has resulted in below-average precipitation and runoff in the SWP source area; in fact 2013
was the driest year on record. As a result, DWR has announced that storage in SWP reservoirs
is low and deliveries for 2014 will be substantially reduced or even eliminated (as of January 31,
2014, DWR announced a reduction of Table A Allocation to zero percent). In addition to drought
1 To address the pumping in excess of local recharge and the growing groundwater depression in the
NMMA, the Settlement Stipulation and Judgment require the NCSD to purchase and deliver a minimum of
2,500 acre-feet per year (AFY) of supplemental water to the Nipomo Mesa.
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conditions, SWP pumping capacity was reduced as the result of a May 2007 federal court ruling
to protect Delta smelt. These factors will directly reduce the allocation of water available to Pismo
and OCSD through the SLOFCWCD in 2014.
However, the threat of reduced delivery to local SWP users—Oceano CSD and Pismo
Beach—has not fully materialized to date, as deliveries to certain areas in San Luis Obispo
County continues to be approved in greater amounts than if the full SWP delivery reductions were
occurring, in part because the SLOFCWCD is able to use some of its unallocated Table A amount
to augment deliveries. The SLOFCWCD holds SWP allocation in addition to the amount needed
to meet contracts with local agencies. This source of extra allocation may be used by service
areas in San Luis Obispo County with SWP contracts such as Oceano CSD and Pismo Beach as
a drought buffer to provide additional deliveries during years when full deliveries are not available.
Nonetheless, in the future, the Delta’s fragile ecosystem, uncertain precipitation patterns and
reduced snowmelt may further reduce California’s water supply reliability with potential
ramifications for Oceano CSD and Pismo Beach.
4.1.3.2 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 Annual Report documented that a portion of the NCMA groundwater basin
exhibited water surface elevations below sea level (NCMA 2008 Annual Monitoring Report).
Hydrographs for NCMA sentry wells (Figure 12) show coastal groundwater elevations that were at
relatively low levels for as long as two 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. Increased TDS, Na
and Cl concentrations were found in sentry well 32S/13E N03 in August 2009 and in 32S/13E
N02 in August and October 20092.
As documented in Section 4.1.2 of this report, groundwater elevations in July 2013 and
October 2013 were significantly below groundwater elevations in July and October 2012.
However they were above water level elevations measured in the same months in 2008 and
2009. Water elevation and water quality measurements in 2009 through October 2013 indicate
the following:
Sentry wells in the cluster 32S/13E 30N may be relatively sensitive to seawater intrusion
because of their location near Arroyo Grande Creek and the more permeable sediments
2 In addition to increased water levels beginning in 2010, well head modifications were made to all sentry wells in July
2011. Specifically, all well heads were raised above ground level. Prior to the modifications, the sentry wells including
30N piezometers were completed below land surface. The location and condition of the well heads raised concerns
about the potential for contamination of samples.
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deposited by the ancestral creek (NCMA 2009 Annual Monitoring Report) as well as the
lower groundwater elevations typical to the east (Figures 9 and 10).
The initial portions of the seawater/groundwater interface were detected onshore at one
site beginning with elevated chloride levels in May 2009; by October 2009 the interface
had manifested in the middle and deep aquifer zones monitored by sentry wells 30-N02
and 30-N03. The extent to which seawater may have intruded other localized aquifer
zones along the coast without being detected in the NCMA sentry wells is unknown due to
heterogeneity of the aquifer and spacing of sentry wells.
Above average precipitation and decreased groundwater withdrawal in 2010 resulted in
increased water levels in the sentry wells on a comparative seasonal basis and an
apparent relief of the water table depression immediately south of lower Arroyo Grande
Creek. Recent dry conditions in 2012 and 2013 have caused an overall lowering of water
levels in the sentry wells and a resumption of the pumping depression that was recognized
in 2009 (Figure 10).
In April 2013 groundwater extractions were increased in response to a short-term
shutdown of the Lopez Lake delivery system for maintenance. At that time water levels in
several sentry wells remained below normal for several weeks, and below sea level in
sentry well 30F03 (Highway 1 deep well). The brief shutdown of Lopez Lake deliveries
and increased groundwater pumping resulted in a short (one month) period when the deep
well index was below the index standard of 7.5 feet. The index value recovered by late
May 2013, but dipped below the 7.5-foot index again by late July 2013, where it remained
until late December. As discussed previously, maintaining water levels above the 7.5-foot
index is considered to create a sufficient gradient to avoid sea water intrusion.
Water quality in most wells remains similar to historic measurements but more importantly,
showed no indication of the effects of seawater intrusion after the April pumping event or
from the approximately 5-month month period when water levels were below the 7.5-foot
deep well index.
4.1.3.3 Measures to Avoid Seawater Intrusion
In recognition of the risk of seawater intrusion, the Northern Cities have developed and
implemented a water quality monitoring program for the sentry wells and Oceano CSD
observation wells, as described above. The Northern Cities, SLOFCWCD, and State of California
have also worked cooperatively toward the protection of the sentry wells as long-term monitoring
sites. Several measures are employed by the Northern Cities to reduce the potential for seawater
intrusion. Specifically, the Northern Cities have voluntarily reduced coastal groundwater pumping,
decreased overall water use via conservation, and initiated plans, studies and institutional
arrangements to secure additional surface water supplies. As a result, each of the four major
municipal water users reduced groundwater use between 25 and 90 percent between 2007 and
2010. In 2013, groundwater use ranged between 3 and 68 percent of the groundwater use in
2007.
The deepening pumping depression within the NMMA appears to have reduced or
eliminated the groundwater divide between the NCMA and NMMA. With the loss of this divide
there has been a reversal of groundwater gradients and the development of a landward gradient
in the southern portion of the NCMA. This landward gradient creates conditions favorable for
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seawater intrusion in the NCMA and NMMA. To limit further increases in the risk of seawater
intrusion, immediate measures must be made to reduce demand in the NMMA. Additionally, the
County of San Luis Obispo, which possesses land use authority, must restrict any future
development that increases water demand in the NMMA.
4.1.3.4 Change in Groundwater Recharge along NMMA Boundary
Groundwater recharge to the NCMA includes subsurface flow from adjacent areas into the
aquifers that supply water wells serving the NCMA. Historically an important source of
subsurface recharge has been in-flow to the NCMA from the NMMA along the southeast
boundary of the NCMA, previously estimated to be 1,300 AFY (DWR 2002). However, it appears
that this inflow from the NMMA has been reduced to “something approaching no subsurface flow”
due to lower groundwater levels in the NMMA (NMMA 2nd Annual Report CY 2009, page 43).
This condition has continued to worsen through continued deepening and expansion of the
depression in water level elevations in the inland portion of the NMMA. Contour maps prepared
by DWR for spring 1975, 1985, 1995 and 2000 as well as Figures 6-5 and 6-6 from NMMA
Annual Reports for Calendar Years 2010, 2011, and 2012, indicate a growing depression in water
level elevations in the NMMA as a result of increased groundwater extractions, and recent data
indicates that the depression continued to expand and deepen in 2013.
The pumping depression creates a “transient groundwater divide” between the inland
portion of the NMMA and the NCMA. As the groundwater depression continues to deepen and
expand to the west and north, “the groundwater divide may dissipate, resulting in a lack of
groundwater gradients from the inland portion of the NMMA toward the coast” (NMMA 5th Annual
Report CY 2012). This potential reversal of groundwater gradients and the development of a
landward gradient creates a condition favorable for seawater intrusion as well as reduces or
eliminates a significant source of recharge to the NCMA water-producing zones.
The NMMA 5th Annual Report CY 2012 (Figures 6-5 and 6-6) describes the presence of a
persistent northwest/southeast-trending depression in water level contours in the northern portion
of the NMMA. The NMMA 4th and 5th Annual Reports indicate that “there are a number of direct
measurements that indicate that demand exceeds the ability of the supply to replace water
pumped from the aquifers” (NMMA 4th Annual Report CY 2011 Finding 4, NMMA 5th Annual
Report CY 2012, Finding 3).
The NMMA projects an increasing water demand and groundwater use in the
management area (NMMA 5th Annual Report CY 2012, page 32) and a growing deficit between
supply and demand. Based on the reported groundwater extractions in the NMMA, it appears
that groundwater pumping significantly exceeds the apparent dependable yield. Due to the
ongoing imbalance between extraction and replenishment of aquifers in the NMMA, increased
groundwater demand may lower water level elevations along the NMMA and NCMA boundary
below current levels. Currently, the NMMA reports that the groundwater elevations near the
“saddle” or transient divide between the NMMA and the NCMA are in the “range of several feet
higher than adjacent areas” (NMMA 5th Annual Report CY 2012, page 40). However, water level
data from County Monitoring Well #3 (32N03) shows that water levels in the area are declining,
perhaps as much as 10 to 15 feet. As the historical subsurface inflow recharge from the NMMA
to the NCMA declines (or is reversed), the agricultural users in the southeastern portion of the
NCMA may see declining water levels, declining production capability, and conditions favorable
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for seawater intrusion, as noted above (NMMA 5th Annual Report CY 2012). Although clearly
exacerbated by the drought, the harbinger of these conditions was already observed in the water
level data in the NCMA in October 2013, when water levels continued to decline in Monitoring
Well #3 (32N03) and a pumping depression, with some water levels below sea level, appeared in
the southeastern agricultural production area of the NCMA (Figure 10).
4.2 WATER DEMAND
Water demand refers to the total amount of water used to satisfy various needs. In the
NCMA, water is primarily used to satisfy urban demand and applied irrigation demand. The third
category, rural demand, includes small community water systems, domestic, recreational and
agriculture-related businesses, and has historically comprised a relatively minor component of the
overall demand of the area. Table 6 (following page) presents water demands for urban uses,
applied irrigation, and rural uses.
Table 6. Total Water Demand (Groundwater and Surface Water, AFY)
Year Arroyo
Grande
Grover
Beach
Pismo
Beach
Oceano
CSD
Total
Urban
Applied
Irrigation
Rural
Water
Total
Demand
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
4.2.1 Urban Demand
Urban water demands are presented in Table 6 for each of the Northern Cities from 2005
through 2013. These demand values reflect reported Lopez Lake and State Water Project (SWP)
purchases and groundwater production data, and represent all water used within the service
areas of the four agencies comprising Northern Cities, including the portions of Arroyo Grande
and Pismo Beach that extend outside the NCMA (see Figure 2). The urban demand data include
water delivered to municipal customers and all other water used by the respective municipal
agency as well as system losses. Urban demand declined from 2010 to 2011, but has increased
slightly each year for the past three years. Current urban demand is significantly below the
demand levels experienced from 2005 through 2009.
4.2.2 Applied Irrigation Demand
Applied Irrigation Demand (Table 6) is an in-direct measurement that requires a method
for estimating Annual Gross Irrigation Water Requirement (AGIR). The San Luis Obispo County
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Water Master Report uses a crop-specific method for calculating AGIR in acre-feet per year per
acre (AFY/acre), based on crop ET, effective rainfall, leaching requirements, irrigation efficiency,
and frost protection. Calculation of the AGIR, which is then used to estimate the applied water for
irrigation for an aggregated area, is described in the following equation:
AGIR (Ft) = [(Crop ET – Effective Rainfall) / ((1-Leaching Requirement) x Irrigation
Efficiency)] + Frost Protection Water
The calculated crop-specific applied water is multiplied by the specific crop acres to obtain
the irrigation demand for a given crop type. The individual crop demands are then summed for
the agricultural area of interest.
In the NCMA, representative land use survey information that was utilized in the initial
NCMA annual reports for calendar years 2008 and 2009 contained an estimate of agriculture
water use based on acres aggregated by crop type. Recently, the San Luis Obispo County
Agricultural Commissioners office (ACO) compiled an estimate of irrigated acres with spatial
information, compatible for use in GIS. A view displaying the irrigated agriculture land for 2012 is
presented as Figure 22; the 2012 compilation of irrigated lands for 2012 is considered
representative of irrigated land conditions for 2013 because significant changes in agricultural
land use have not occurred. The 2012 irrigated acres totaled 1,485 acres, about 7-percent less
that reported in the NCMA 2008 Annual Monitoring Report. A visual observation comparing the
views indicates the slightly lower amount of irrigated acres in 2012/2013 versus 2008/2009 is
because the most recent survey recognizes roads and farmsteads within the agriculture area as
unfarmed areas , thus, the total irrigated acreage is less.
For comparison to the past reports, the water use in the NCMA 2012 Annual Monitoring
Report was estimated based on the 1,485 acres identified by the ACO as irrigated land in 2012,
multiplied by a representative annual water use value of (21.86 inches). The annual water use
value was obtained from tables for Miscellaneous Field Crops and Strawberries, drip irrigation
method, and a dry year, published by the Irrigation and Training Research Center (ITRC) in Cal
Poly. In comparison, the two estimates differ by slightly more than 1-percent.
The estimate based on the ACO acres and ITRC water use: 1,485 acres x 21.86 inches =
2,705 acre-feet. In comparison, the estimate based on the method used in the Todd (2007) report
for a dry year was 2,742 acre-feet.
Based on this comparison made in the NCMA 2012 Annual Monitoring Report, the method
used to estimate agricultural water use for 2013 remains the same as for the previous annual
report. The annual irrigation demand for the NCMA is represented by the aggregate of the crop
acres by category multiplied by the estimated gross irrigation requirements per acre from the San
Luis Obispo County Water Master Report (WMR).
The WMR estimate of gross irrigation requirements varies by precipitation year type,
including low, average, and high estimates of irrigation demand by crop type for each of the Water
Planning Areas (WPAs) in the County. The range in estimated irrigation demands is based upon
climatic conditions and average irrigation efficiency, and includes double cropping for the category
truck crops. Because the WMR does not include gross irrigation requirements for turf grass, the
values for pasture grass were applied to turf grass areas in the NCMA to estimate their applied
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irrigation demand. The representative gross irrigation requirements for crop groups are presented
in Table 7 (following page).
As stated in the previous Annual Report, the areal extent of cultivated agricultural areas in
the NCMA was quantified using a past land use survey by the ACO. Based on observation of the
agricultural land use in views developed with recent land use survey information, the agriculture
land use in the NCMA for 2013 has remained the same, consistent with previous years. Given
this observation, the estimated agriculture acreage remains based on agriculture land use survey
data and the previously applied methods. The areas with irrigated turf grass have been
previously identified by public works personnel within the Northern Cities. The acreages of these
areas have been measured from publically available aerial photographs using GIS software tools.
Table 7. Gross Irrigation Requirement for WPA 5 by Crop Group
Crop Type
Low Annual
Demand
(AFY/acre)
Average Annual
Demand
(AFY/acre)
High Annual
Demand
(AFY/acre)
Alfalfa 2.5 2.9 3.3
Nursery 1.4 1.7 2.1
Pasture 2.6 3.0 3.5
Turf Grass 2.6 3.0 3.5
Citrus 1.3 1.6 1.9
Deciduous 2.6 2.9 3.2
Truck (vegetable) 1.2 1.4 1.6
Vineyard 0.9 1.1 1.4
In the previous year estimates there were about 1,600 acres of irrigated agriculture within
the NCMA of which approximately four acres are in nursery crops, and the remainder is truck
crops such as broccoli, onions, and strawberries. Also identified was a combined total of 44 acres
of irrigated turf grass at the Oceano Elementary School, Arroyo Grande High School, Harloe
Elementary School, and the Le Sage Riviera Golf Course.
For this evaluation, average irrigation efficiencies are assumed for the NCMA. Therefore,
the annual irrigation demand for each crop type is assumed to be dependent only on that year’s
precipitation and ET. For 2013, the annual precipitation and ET conditions indicate a Dry Year.
The assigned year type for the demand estimates for all applied irrigation uses since 2004 are as
follows:
Wet years: 2,056 AFY (2005, 2006, and 2010)
Average years: 2,397 AFY (2004)
Dry years: 2,742 AFY (2007, 2008, 2009, 2011, 2012, and 2013)
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4.2.3 Rural Demand
In the NCMA, rural water demand refers to uses not designated as urban demand or
applied irrigation demand 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 review of a list of water
purveyors compiled in the 2007 San Luis Obispo County Integrated Regional Water Management
Plan (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 as
well as 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.
Irrigation of schools and parks from privately operated wells is included in the applied irrigation
demand section. Two mobile home communities, Grande Mobile and Halcyon Estates, are
served by Oceano CSD through the distribution system of Arroyo Grande, thus the demand
summary of Oceano CSD 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 four Northern Cities.
The estimated rural water demand is shown in Table 8.
Table 8. Estimated Rural Water Demand
Groundwater User
No.
of
Units
Estimated Water
Demand, AFY per Unit
Estimated Water
Demand, AFY Notes
Halcyon Water System 35 0.40 14 1
Ken Mar Gardens 48 0.25 11.7 2
Pacific Dunes RV Resort 215 0.03 6 3
Rural Users 25 0.40 10 1
Current Estimated Rural Use 41.7
1 - Water demand/unit based on 2000 and 2005 Grover Beach water use per connection, 2005 UWMP.
2 - Demand based on metered water usage.
3 - Water demand/unit assumes 50 percent annual occupancy and 0.06 AFY per occupied site.
4.2.4 Changes in Water Demand
In general, urban water demand has ranged from 7,473 AF (2011) to 8,982 AF (2007),
with an average annual water use from 2005 to 2013 of 8,178 AFY (Table 6). The years 2009
through 2013 have been consistently at or below the average which may be attributed to the
relatively slower economy and conservation activities implemented by the Northern Cities. In the
applied irrigation category, agricultural acreage has remained fairly constant. Thus, annual water
demand for applied irrigation varies mostly with weather conditions. Acknowledging the variability
due to weather conditions (see Table 6), applied irrigation water demand is not expected to
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change significantly given the relative stability of applied irrigation acreage and cropping patterns
in the NCMA south of Arroyo Grande Creek. Changes in rural demand have not been significant.
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5.0 COMPARISON OF WATER SUPPLY V. WATER DEMAND
Table 4 (page 10) shows the Available Urban Water Supplies for each of the Northern
Cities, with a total available urban water supply of 10,769 AFY. As discussed in Section 4, the
2002 Management Agreement estimated that the historical safe yield from the groundwater basin
was 9,500 AFY. Because all of the irrigation applied water demand is supplied by groundwater,
the total available applied irrigation supply is a portion of the estimated groundwater 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 applied irrigation and rural use, the remaining 4,200 AFY is allocated for
urban water use (4,000 AFY) along with an estimated 200 AFY to subsurface outflow to the
ocean.
In 2012, the total urban water demand was 7,938.5 AF (Table 6), compared to the
available urban water supply of 10,769 (assuming full delivery of SWP allocation). The estimated
2013 applied irrigation water use is 2,742 AF, and rural water use is estimated at 41.7 AF.
The total estimated 2013 NCMA water demand was 10,722.2 AF (Tables 6 and 9). The
water demand, by source, of each city and agency in 2013 is shown in Table 9.
Table 9. 2013 Water Demand by Source (AF)
Urban Area Lopez
Lake
State
Water
Project
Groundwater Transfers Other
Supplies Total
Arroyo Grande 2,722.3 0.0 268.4 0.0 120.2 3,110.9
Grover Beach 802.7 0.0 988.8 0.0 0.0 1,791.5
Pismo Beach 1,457.4 618.0 73.0 0.0 0.0 2,148.4
Oceano CSD 44.9 750.0 92.8 0.0 0.0 887.7
Urban Water Use Total 5,027.3 1,368.0 1,423.0 0.0 120.2 7,938.5
Applied Irrigation 0.0 0.0 2,742.0 0.0 0.0 2,742.0
Rural Water Users 0.0 0.0 41.7 0.0 0.0 41.7
Total 5,027.3 1,368.0 4,206.7 0.0 120.2 10,722.2
Urban water demand in 2013 to the NCMA was supplied from 5,027 AF of Lopez Lake
water, 1,368 AF of State Water Project water, and 1,423 AF of groundwater. The 120 AF of
“Other Supplies” delivered to Arroyo Grande consists of groundwater pumped from the Pismo
Formation, which is located outside of the shared groundwater basin.
Based on the estimated groundwater safe yield, the total available supply for all uses is
15,699 AFY, which is the sum of 10,729 AFY for urban plus the allocation for applied irrigation
and rural area of 4,970 AFY. Total 2013 NCMA water demand is estimated at 10,722 AF.
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6.0 MANAGEMENT ACTIVITIES
The NCMA and overlying private well users have actively managed surface water and
groundwater resources in the Northern Cities area for more than 30 years. Management
objectives and responsibilities were first established in the 1983 Gentlemen’s Agreement and
updated in the 2002 Management Agreement. The responsibility and authority of the Northern
Parties for NCMA groundwater management was formally established through the 2002
Settlement Agreement, 2005 Stipulation, and 2008 Judgment. Throughout the long history of
collaborative management, which was formalized through the Agreement, Stipulation, and
Judgment, the overall management goal for the Northern Cities is to preserve the long-term
integrity of water supplies in the NCMA portion of the Santa Maria Groundwater Basin (SMGB).
6.1 MANAGEMENT OBJECTIVES
Seven basic objectives have been established for ongoing NCMA groundwater
management. Under each objective, the NCMA technical group has identified a number of
strategies to meet the objectives. These strategies are listed and then discussed under each of
the seven objectives listed below along with the history and rationale. Other potential objectives
are outlined in the final section.
The Northern Cities, both individually and jointly, are engaged in water resource
management projects, programs, and planning efforts that address water supply and demand
issues, particularly efforts to assure a long-term sustainable supply. Each section discusses
major management activities during 2013.
6.1.1 Share Groundwater Resources and Manage Pumping
Strategies:
Continued reduction of groundwater pumping, maintain below safe yield.
Coordinated delivery of Lopez Lake surplus water to maximize surface water supplies.
Continue to import State Water Project supplies to Oceano CSD and Pismo Beach.
Perform capacity assessments on the Lopez Lake and Coastal Branch pipelines to allow
maximum current and future surface water imports.
Maintain surface water delivery infrastructure to maximize capacity.
Discussion:
A longstanding objective of water users in the NCMA has been to cooperatively share and
manage groundwater resources. In 1983 the Northern Parties mutually agreed on an initial safe
yield estimate (defined by DWR) and an allotment of pumping between the urban users and
applied irrigation users of 57 percent and 43 percent, respectively. In this agreement the
Northern Cities also established pumping allotments among themselves. Subsequently, the 2002
Management Agreement included provisions to account for changes such as ag land
conversions. The agreements provide that any increase or decrease in the safe yield based on
ongoing assessments would be shared on a pro rata basis. Pursuant to the stipulation the
Northern Cities conducted a water balance study to update the safe yield estimate (Todd 2007).
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Among other results, the parties 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 Northern
Cities have coordinated delivery of water from Lopez Lake and have continued to import SWP
water to maximize use of available surface water supplies. In 2013, Oceano CSD received its full
allotment of SWP water and Pismo Beach imported nearly 50% of its allotment. These activities
allow the Northern Cities, as a whole, to actively and effectively manage the groundwater
resource. Although groundwater use in the NCMA has steadily, but slowly, increased since 2010,
2013 groundwater pumpage is less than any year during the 11-year period from 1999 through
2009.
The water balance study (Todd 2007) highlighted the threat of seawater intrusion as the
most important potential adverse impact to consider in managing 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 sentry well
index of 7.5 feet (NAVD 88) 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 Northern Cities 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, and then again from early July through mid-December 2013, the index value
dropped below the target.
Another potential adverse impact of localized pumping includes reduction of flow in local
streams, notably Arroyo Grande (Todd 2007). The Northern Cities (as Zone 3 contractors) have
participated with SLOFCWCD 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. Additional studies to finalize the HCP are scheduled for 2014.
6.1.2 Monitor Supply and Demand and Share Information
Strategies:
Share groundwater pumping data at monthly NCMA Technical Group meetings.
Evaluate future water demands through comparison to UWMP projections.
o Arroyo Grande 2010 UWMP
o Pismo Beach 2010 UWMP
o Grover Beach 2010 UWMP
o Due to population, OCSD is not required to prepare an UWMP
Discussion:
Regular monitoring of activities that affect the groundwater basin, and sharing that
information, has 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 Northern Cities in accordance with the 2005
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Stipulation and 2008 Judgment, guided by the July 2008 Monitoring Program for the NCMA. The
monitoring data and a summary of groundwater management activities are summarized in the
Annual Reports. Arroyo Grande, Grover Beach, and Pismo Beach have each evaluated their
future water demands as part of their respective 2010 UWMP updates. The NCMA shares
information with the two other management areas (NMMA and SMVMA) through data exchange
and regular meetings throughout the annual report preparation cycle. The sharing of information
has expanded as the management areas continue to work together.
6.1.3 Manage Groundwater Levels and Prevent Seawater Intrusion
Strategies:
Utilize storm-water ponds to capture storm-water run-off and recharge the groundwater
basin.
Install transducers in key monitoring wells to provide continuous groundwater elevation
data; the following wells have transducers:
o 24B01
o 24B03
o 30F03
o 30N02
o County Monitoring Well #3
Collect and evaluate daily municipal pumping data to determine impact on local
groundwater elevation levels.
Continue to pursue IRWM Planning grant funding and other potential revenue sources to
characterize the SMGB as basis for developing a groundwater flow model.
Discussion:
Prevention of seawater intrusion through the management of groundwater levels is
essential to protect the shared resource. The NCMA agencies both increase groundwater
recharge with stormwater infiltration as well as closely monitoring groundwater levels and water
quality in sentry wells along the coast.
Arroyo Grande and Grover Beach each maintain storm water retention ponds within their
jurisdiction; the SLOFCWCD maintains the storm water system, including retention ponds, in
Oceano. These ponds collect storm water 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 storm water detention pond in Oceano CSD is
approximately one-half acre. Grover Beach modified its storm water system in 2012 to direct
additional flow into one of its recharge basins.
While 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 Northern Cities and SLOFCWCD have long
cooperated in the monitoring of groundwater levels, including quarterly measurement by the
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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 well-heads (surface completions) at four sentry monitoring well clusters within the
Northern Cities Management Area were renovated (Todd 2010). The modifications occurred at
well clusters:
32S/12E-24B01, B02, B03;
32S/13E-30F01, F02, F03;
32S/13E-30N01, N02, N03; and
12N/36W-36L01, L02.
The renovations included raising the elevations of the top of each individual well casing by
two to three feet in order to reduce the risk of surface water entering the wells. Because the top
of the well casing is used as the reference point for all depth to water measurements, the new
surface completions were surveyed relative to the NAVD 88 standard in late September 2010
(Wallace Group 2010). The individual well casings have been raised above ground surface and
protective locking steel risers now enclose each cluster. As a result of this work, the sentry wells
within the NCMA are now 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. The fruits of these efforts with respect to
observation of short-term responses to applied stresses in the basin through the collection of
continuous groundwater levels are illustrated by the recognition of the sharp decline in
groundwater levels at the coast in response to increased groundwater pumpage when Lopez
Lake deliveries were temporarily suspended (see Section 4.1.2.2 and Figures 15-17). This short-
term water level decline would not typically have been observed in the past when water levels
were measured on a semi-annual or quarterly basis.
In order 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
#3). Well 32C03 was constructed and is owned by the County of San Luis Obispo and is part of
their county-wide groundwater monitoring network. Well 32C03 is completed to 170 feet with a
screened interval from 90 to 170 below ground surface and is constructed of 5-inch diameter
polyvinyl chloride (PVC) casing. To provide more detail regarding seasonal and other
groundwater level changes in the area between the NCMA and NMMA, detailed water level
monitoring was initiated in April 2012. Sensors were installed to document long- and short-term
changes in water level, temperature and specific conductance. The results from detailed
monitoring of Well 32C03 are provided in Figure 18.
Additional studies to enhance basin management efforts that have been discussed by the
NCMA TG include:
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Implement 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.
Implement a monthly analysis of electrical conductivity (EC) data from the wells with
downhole transducers (24B01, 24B03, 30F03, 30N02, County Well #3) during periods
when the deep well index value is below the index target of 7.5 feet to track potential water
quality degradation. If EC data suggests water quality degradation, implement a monthly
sampling and monitoring program.
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.
Lastly, the 2005 Settlement requires NCSD and the other Mesa parties to import 2500
AFY to mitigate overpumping that has impacted groundwater inflow to the NCMA, and thus may
facilitate seawater intrusion in both NCMA and NMMA. Although considerable progress in
importing water has been made, overpumping on the Mesa continues and the terms and
requirements of the Settlement have not been fulfilled.
6.1.4 Protect Groundwater Quality
Strategies:
Perform quarterly water quality monitoring at all sentry wells and County Well #3.
Gather temperature and electrical conductivity data from five monitoring wells to
continuously track water quality indicators for seawater intrusion.
Use IRWM Planning grant opportunities to characterize the groundwater basin as a basis
for the development of a Salt and Nutrient Management Plan pursuant to State policy.
Utilize IRWM Planning grant funding to investigate alternatives for utilizing recycled water
from the Pismo Beach and the South San Luis Obispo County wastewater treatment
plants, including:
o Development of a seawater intrusion barrier.
o Recharge groundwater basin for indirect potable re-use.
o Offset potable water pumping through agriculture/landscape irrigation.
o Augment stream flow in Arroyo Grande creek.
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 expensive water treatment processes. Sentry wells are monitored quarterly and data from
other NCMA production wells are assessed annually. The monitoring program includes
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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. Additionally,
NCMA efforts in conjunction with the NMMA have resulted in the ongoing efforts to characterize
the groundwater basin in preparation for the possible development of a Salt and Nutrient
Management Plan.
6.1.5 Manage Cooperatively
Strategies:
Include the Santa Maria Valley Management Area (SMVMA) in the Santa Maria
Groundwater Basin Management Areas (SMGB MA) Technical Subcommittee.
Coordinate groundwater monitoring data sharing and annual report preparation with the
NCMA, NMMA and the SMVMA.
Discussion:
Since 1983, NCMA management has been based on cooperative efforts of the affected
parties, including the Northern Cities entities, private agricultural groundwater users, San Luis
Obispo County, the SLOFCWCD, and other local and state agencies. Specifically the NCMA
agencies have limited their pumping and, in cooperation with SLOFCWCD, invested in surface
water supplies 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 report,
cooperative management occurs through many other venues and forums, including
communication by the Northern Cities in their respective public meetings, participation in the
Water Resources Advisory Council (the County-wide advisory panel on water issues), and active
participation in the ongoing IRWM Plan Update.
The NCMA agencies participated in preparation and adoption of the 2007 San Luis Obispo
County Integrated Regional Water Management Plan (IRWMP). The IRWMP promotes
integrated regional water management to ensure sustainable water uses, reliable water supplies,
better water quality, environmental stewardship, efficient urban development, protection of
agriculture, and a strong economy. The IRWMP integrates all of 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. The
SLOFCWCD received a DWR grant to update the 2007 Plan.
Since the 2008 Judgment, the NCMA has taken the lead in cooperative management of its
management area. The NCMA has also been a proactive participant in the Santa Maria
Groundwater Basin Management Area technical subcommittee, which formed in 2010. These
efforts continued throughout 2013. The NCMA Technical Group met monthly (at a minimum)
throughout 2013. The group also met four times with the NMMA and SMVMA groups. The
coordination among the management areas is leading to joint projects such as enhanced
monitoring of groundwater levels and improved sharing of data.
The NCMA meetings also provide for collaborative development of joint budget proposals
for studies and plans as well as shared water resources (as discussed in Section 6.1.1 and 6.1.4).
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In addition, the monthly meetings provide a forum for discussing the data collected as part of the
quarterly monitoring reports (as discussed in Sections 6.1.2 and 6.1.3).
A key water supply planning and management activity started in late 2013 by the NCMA is
the initiation of joint Strategic Planning efforts for the purpose of providing the NCMA Technical
Group with a framework for identifying common water resource planning goals and objectives,
and to establish a 10-year work plan for implementation of those efforts. Several key objectives
have been identified, including water supply reliability, increased outreach, and basin
management. These efforts will continue throughout 2014
6.1.6 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 significant water use reductions by the year 2020. Water conservation
activities in the NCMA are summarized in various documents produced by the Northern Cities,
including the 2010 Urban Water Management Plans of Arroyo Grande, Grover Beach, and Pismo
Beach. Due to the population of its service area, Oceano CSD is not required to prepare an
UWMP or reduce water consumption by 20% by 2020; however the OCSD encourages water
conservation and the installation of low flow fixtures.
The Northern Cities implement water conservation activities to reduce water use and thus
reduce groundwater demand. The Cities participate in a wide range of water conservation
activities designed to educate the public on ways to reduce water use.
City of Arroyo Grande
The City of Arroyo Grande supports a part time water conservation coordinator staff
position to manage existing conservation activities, encourage public participation, and create
new conservation programs for the community. In the last 10 years, Arroyo Grande spent over
$1,400,000 on water conservation efforts. Arroyo Grande is implementing the following water
Demand Management Measures (DMMs):
Water Survey Programs (Equivalent program elements)
Residential Plumbing Retrofits
Water System Audits
Metering with Commodity Rates
Large Landscape Irrigation Programs
High-efficiency washing machine rebate programs
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Public information programs.
School education programs.
Conservation programs for commercial and institutional accounts.
Conservation pricing.
Water conservation coordinator.
Water waste prohibition.
Residential ultra-low-flush toilet replacement programs.
Cash for Grass.
The water conservation efforts of Arroyo Grande have been successful; the DMMs that
have been implemented have decreased water use per residential connection from 190 gallons
per capita per day (gpcd) to 160 gpcd. The target per capita usage for 2015 is 167 gpcd, while
the target per capita usage for 2020 is 149 gpcd. Continued implementation of these DMMs will
help Arroyo Grande to reach its per capita water use goals and indicates the commitment Arroyo
Grande has to optimizing use of its water supply.
City of Pismo Beach
The City of Pismo Beach is a member of the California Urban Water Conservation
Council, and as such has developed best management practices (BMPs) to reduce water
consumption and ensure reliable future water supply. Included in BMPs implemented by Pismo
Beach are activities and programs that promote water conservation and sustainable use of water
resources. BMPs that Pismo Beach is implementing or has equivalent coverage for are:
Water Survey Programs
Residential Plumbing Retrofit
Water System Audits
Metering with Commodity Rates
Landscape Irrigation Programs
Conservation Pricing
Water Conservation Coordinator
Ultra Low Flush Toilet Replacement
The water conservation efforts of Pismo Beach have helped reduce residential water use
from a high of 256 gpcd in 2007 to 226 gpcd in 2010. The 10-year baseline average water use is
236 gpcd. Continued implementation of these BMPs and implementation of other BMPs in the
future will help Pismo Beach reach its per capita water use goals and indicates the commitment of
Pismo Beach to optimizing use of its water supply. The target water use for 2015 is 214 gpcd; the
target water use for 2020 is 192 gpcd.
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City of Grover Beach
As described in their 2010 Urban Water Plan, Grover Beach has developed and
implemented Demand Management Measures to reduce water consumption and ensure a reliable
future water supply. Included in the DMMs implemented by the Grover Beach are activities and
programs that promote water conservation and sustainable use of water resources. DMMs that
Grover Beach is implementing or has equivalent coverage are:
Water survey programs for single-family residential and multifamily residential customers
Residential plumbing retrofit
System water audits, leak detection, and repair
Metering with commodity rates for all new connections and retrofit of existing connections
Large landscape conservation programs and incentives
High-efficiency washing machine rebate programs
Public information programs
School education programs
Conservation programs for commercial, industrial, and institutional accounts
Conservation pricing
Water conservation coordinator
Water waste prohibition
Residential ultra-low-flush toilet replacement programs
Grover Beach has implemented or is planning to implement all applicable demand
management measures as part of the Water Conservation Program. The ongoing water
conservation activities of Grover Beach include a “Cash for Grass” rebate, a water-efficient
washing machine rebate program, and smart irrigation controller and sensor rebate program. The
10-year baseline average water use for Grover Beach is 140.7 gpcd. The target water use for
2015 is 127 gpcd, while the target water use for 2020 is 113 gpcd.
6.1.7 Evaluate Alternative Sources of Supply
Strategies:
Evaluate expanded use of recycled water;
Analyze capacity of the Lopez Lake and Coastal Branch pipelines to maximize deliveries
of surface water. The following analyses have been completed:
o Lopez Pipeline Capacity Evaluation
o Lopez Pipeline Capacity Re-Evaluation
o Coastal Branch Capacity Assessment
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Discussion:
The Northern Cities continue to evaluate alternative sources of water supply which 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
Oceano CSD and Pismo Beach are currently SWP customers and could utilize additional
water deliveries. Pismo Beach has increased its SWP allocation by securing a “drought buffer” to
increase the availability of supply during periods of SWP shortfalls. Grover Beach and Arroyo
Grande are not SWP customers.
Water Recycling
In 2010, the South San Luis Obispo County Sanitation District (SSLOCSD) updated their
2001 evaluation of recycled water opportunities. The new evaluation included an evaluation of
using disinfected secondary treated water to irrigate landscaping and the potential use of recycled
water if the SSLOCSD Waste Water Treatment Plant (WWTP) were upgraded to provide tertiary
treatment. By providing tertiary treatment, as much as 189 AFY of potential demand could be
satisfied.
The City of Pismo Beach also has evaluated use of recycled water. As described in the
2010 UWMP, “the City may begin regional planning efforts regarding recycled water within the
next five years”. The City of Pismo Beach is considering plans to upgrade its waste water
treatment plant to provide an anticipated recycled water supply of up to an estimated 1,558 AFY
in 2015. This estimate provides an idea of the amount of recycled water that could be available.
The City of Pismo Beach UWMP anticipates that the recycled water not used for irrigation near
the WWTP and in the Price Canyon development area “may be applied towards groundwater
recharge operations.”
New funding through the county IRWM Plan update will allow additional progress in water
recycling in the NCMA.
Lopez Lake Expansion
In 2008, San Luis Obispo County sponsored a preliminary assessment of the concept of
installing an inflatable rubber dam at the Lopez Dam spillway. Subsequently, the SLOFCWCD
Service Area 12 and the Cities of 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 the lake by 500 AFY with a spillway height increase by
6 ft (Stetson 2013). The NCMA agencies are continuing to evaluate other aspects of the project,
including pipeline capacity and impacts on the HCP process (Stetson. 2013).
Desalination
In 2006, Arroyo Grande, Grover Beach, and Oceano CSD utilized 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.
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Nacimiento Pipeline Extension
In 2006, Arroyo Grande, Grover Beach, and Oceano CSD completed a Nacimiento
pipeline extension evaluation to determine the feasibility of delivery 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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7.0 REFERENCES
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 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.
Miller, G. A. and Evenson, R. E. 1966. Utilization of Groundwater in the Santa Maria Valley Area,
California. USGS Water Supply Paper 1819-A.
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.
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.
Nipomo Mesa Management Area, 2nd Annual Report, Calendar Year 2009.
Nipomo Mesa Management Area, 3rd Annual Report, Calendar Year 2010.
Nipomo Mesa Management Area, 4th Annual Report, Calendar Year 2011.
Nipomo Mesa Management Area, 5th Annual Report, Calendar Year 2012.
Stetson Engineers. 2013. Lopez Lake Spillway Raise Project Report.
Item 11.a. - Page 78
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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.
Todd. 2007. Water Balance Study for the Northern Cities Area. Todd Engineers. April 2007.
Todd. 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.
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.
Item 11.a. - Page 79
F IGURES
Item 11.a. - Page 80
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Project No. 04.62130129
SANTA MARIA GROUNDWATER BASIN
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Item 11.a. - Page 83
Northern Cities Management Technical Group
Project No. 04.62130129
MONTHLY 2013 AND AVERAGE PRECIPITATION AND EVAPORATION
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Item 11.a. - Page 84
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FIGURE 6
Item 11.a. - Page 86
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Project No. 04.62130129
LOCATION OF SENTRY WELLS
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Project No. 04.62130129
WATER LEVEL CONTOURS, APRIL 2013
Northern Cities Management Area
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WATER LEVEL CONTOURS, OCTOBER 2013
Northern Cities Management Area
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Item 11.a. - Page 92
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Item 11.a. - Page 93
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Item 11.a. - Page 95
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Northern Cities Management Technical Group
Project No. 04.62130129
FIGURE 16
Item 11.a. - Page 96
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Northern Cities Management Technical Group
Project No. 04.62130129
FIGURE 17
Item 11.a. - Page 97
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Northern Cities Management Technical Group
Project No. 04.62130129
FIGURE 18
Item 11.a. - Page 98
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CHLORIDE CONCENTRATIONS IN SENTRY WELLNorthern Cities Management Area San Luis Obispo County, California
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Item 11.a. - Page 99
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TOTAL DISSOLVED SOLIDS CONCENTRATIONS IN SENTRY WELLNorthern Cities Management Area San Luis Obispo County, California
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Item 11.a. - Page 100
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Northern Cities Management Area Technical Group
Project No. 04.62130129
FIGURE 21
Item 11.a. - Page 101
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Northern Cities Management Area Technical Group
Project No. 04.62130129
FIGURE 22
Item 11.a. - Page 102
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Northern Cities Management Area Technical Group
Project No. 04.62130129
FIGURE 23
Item 11.a. - Page 103
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Project No. 04.62130129
FIGURE 24
Item 11.a. - Page 104
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Northern Cities Management Technical Group
Project No. 04.62130129
FIGURE 25
Item 11.a. - Page 105
Pacific Ocean
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Sources: Esri, DeLorme, NAVTEQ, USGS, Intermap, iPC,
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(Thailand), TomTom, 2013
120°34'0"W
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Northern Cities Management Area
Project No. 04.62130129
NCMA AGRICULTURAL LAND 2013
Northern Cities Management Area
San Luis Obispo County, California FIGURE 26
Ü
0 5,0002,500
Feet
Northern Cities Management Area
Creeks
1:60,000
Legend
Crops
<all other values>
crop_list
COMMR/INST/IND
GP-FLWRNG PLANT
LANDSCAPE MAIN, VERTEBRATE CTRL
LETTUCE HEAD, Rotational Crops
N-GRNHS TRANSPL, Rotational Crops
N-OUTDR TRANSPL, Rotational Crops
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Item 11.a. - Page 106
A PPENDIX A
Item 11.a. - Page 107
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c
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C
a
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,
S
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a
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l
o
w
Item 11.a. - Page 108
Da
t
e
Su
l
f
a
t
e
(m
g
/
L
)
Ni
t
r
a
t
e
(m
g
/
L
)
To
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a
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K
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l
d
a
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Ni
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n
(m
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/
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Bo
r
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n
(m
g
/
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Fl
u
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r
i
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(m
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/
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Io
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(m
g
/
L
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Ma
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g
a
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s
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(m
g
/
L
)
Br
o
m
i
d
e
(m
g
/
L
)
Al
k
a
l
i
n
i
t
y
,
To
t
a
l
(a
s
C
a
C
O
3
)
(m
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/
L
)
Ca
r
b
o
n
a
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e
(a
s
C
a
C
O
3
)
(m
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/
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Hy
d
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x
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(a
s
C
a
C
O
3
)
(m
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/
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Co
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d
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a
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(u
m
h
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s
/
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)
Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
5
/
2
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1
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1
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0
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7
1
0
.
0
0
2
3
4
3
3
1/
1
4
/
2
0
1
4
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
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10
/
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4
,
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1
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0
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7
5
0
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0
0
2
5
4
0
0
10/14/2013
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
A
N
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N
A
N
A
7/
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7/26/2011
N
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N
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N
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N
A
N
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N
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N
A
N
A
N
A
N
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N
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N
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N
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7/
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2
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0
N
A
0
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0
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1/
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10
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10/21/2010N
A
N
AN
AN
AN
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AN
AN
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AN
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ANANANANA
7/
2
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2
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8/
2
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0
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2
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7
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<
0
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1
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0
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7.150.0040247
5/
1
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2
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0
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0
NA
NA
NA
0.
1
1
NA
0.
6
6
0.
2
9
28
8
<
1
.
0
<
1
.
0
1
,
1
0
0
23.90.0029345
3/
2
6
/
1
9
9
6
15
4
0.
2
NA
0.
2
7
NA
NA
NA
NA
NA
NA
NA
NANANANA
6/
9
/
1
9
7
6
15
9
0.
4
NA
0.
1
2
0.
5
NA
NA
NA
NA
NA
NA
NANANANA
1/17/1966175
1
N
A0
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.3N
AN
AN
AN
AN
AN
ANANANANA
A-
1
(
C
o
n
t
i
n
u
e
d
)
.
N
C
M
A
S
e
n
t
r
y
W
e
l
l
W
a
t
e
r
L
e
v
e
l
a
n
d
W
a
t
e
r
Q
u
a
l
i
t
y
D
a
t
a
We
l
l
2
4
B
0
1
,
N
o
r
t
h
B
e
a
c
h
C
a
m
p
g
r
o
u
n
d
,
S
h
a
l
l
o
w
Item 11.a. - Page 109
We
l
l
Co
n
s
t
r
u
c
t
i
o
n
To
p
o
f
C
a
s
i
n
g
El
e
v
a
t
i
o
n
(f
t
N
A
V
D
)
Da
t
e
De
p
t
h
t
o
W
a
t
e
r
(f
t
)
Gr
o
u
n
d
w
a
t
e
r
El
e
v
a
t
i
o
n
(f
t
N
A
V
D
)
To
t
a
l
D
i
s
s
o
l
v
e
d
So
l
i
d
s
(m
g
/
L
)
Ch
l
o
r
i
d
e
(m
g
/
L
)
So
d
i
u
m
(m
g
/
L
)
Po
t
a
s
s
i
u
m
(m
g
/
L
)
Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
/
1
2
E
-
2
4
B
0
2
Sc
r
e
e
n
e
d
f
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o
m
1
2
0
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1
4
5
'
-
2
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n
c
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d
i
a
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r
13
.
5
8
2.
8
8
1
/
1
5
/
2
0
1
4
N
A
NA
63
0
33
46
3.
9
10034290
10
.
7
0
1
/
1
4
/
2
0
1
4
6
.
3
4
7.
2
4
NA
NA
NA
NA
NANANA
10
.
7
1
0
/
1
5
/
2
0
1
3
N
A
NA
63
0
30
44
3.
8
9832290
10
/
1
4
/
2
0
1
3
7
.
0
8
6.
5
0
NA
NA
NA
NA
NANANA
7/
9
/
2
0
1
3
7
.
1
7
6.
4
1
63
0
30
43
3.
9
11033295
4/
1
0
/
2
0
1
3
6
.
3
3
7.
2
5
63
0
31
44
4
10032310
1/
1
4
/
2
0
1
3
5
.
6
1
7.
9
7
62
0
30
43
4
9731305
10
/
2
9
/
2
0
1
2
5
.
8
8
7.
7
65
0
29
45
4.
2
10032280
7/
2
3
/
2
0
1
2
6
.
1
2
7.
4
6
65
0
35
45
4.
3
8727297
4/
1
8
/
2
0
1
2
5
.
4
8
8.
1
63
0
37
39
3.
7
8828310
1/
1
1
/
2
0
1
2
5
.
4
7
8.
1
1
65
0
33
46
4.
6
11032300
11
/
2
1
/
2
0
1
1
5
.
6
9
7.
8
9
64
0
32
39
3.
9
9329290
7/
2
6
/
2
0
1
1
6
.
5
1
7.
0
7
NA
NA
NA
NA
NANANA
7/
2
5
/
2
0
1
1
N
A
NA
64
0
36
48
4.
2
9731290
4/
2
0
/
2
0
1
1
6
.
3
0
7.
2
8
62
0
39
46
7.
4
9036320
1/
2
4
/
2
0
1
1
5
.
6
9
7.
5
3
64
0
43
44
5.
9
8728270
10
/
2
8
/
2
0
1
0
N
A
NA
65
0
43
50
4.
5
11035270
10
/
2
1
/
2
0
1
0
6
.
7
9
6.
7
9
NA
NA
NA
NA
NANANA
7/
2
7
/
2
0
1
0
7
.
0
5
6.
5
3
59
8
42
48
.
9
4.
2
9
11140.5318
4/
2
7
/
2
0
1
0
4
.
3
4
6.
3
6
66
8
46
52
.
7
4.
7
3
11143.2349
1/
2
7
/
2
0
1
0
3
.
3
8
7.
3
2
62
2
45
58
.
0
5.
3
9
11532.2270
10
/
1
9
/
2
0
0
9
2
.
2
6
8.
4
4
60
0
49
59
.
1
5.
1
2
11230.1281
8/
2
0
/
2
0
0
9
4
.
0
9
6.
6
1
63
0
49
63
.
5
5.
8
5
12830.1288
5/
1
2
/
2
0
0
9
4
.
7
4
5.
9
6
62
2
82
67
.
5
6.
3
3
11434.5282
3/
2
6
/
1
9
9
6
N
A
NA
65
2
54
46
5
10724344
6/
9
/
1
9
7
6
N
A
NA
56
5
34
52
4
10427337
1/
1
7
/
1
9
6
6
N
A
NA
65
1
62
79
5
10132380
He
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Item 11.a. - Page 110
Da
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e
Su
l
f
a
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(m
g
/
L
)
Ni
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r
a
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(m
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Ni
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Bo
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Br
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Al
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(a
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3
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(m
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(m
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Co
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(u
m
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/
c
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)
Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
5
/
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29
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9400.37NANA
1/
1
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/
2
0
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4
NA
NA
NA
NA
NA
NA
NA
NA
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10
/
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3
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1
29
0
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0
<1
0
9200.39NANA
10/14/2013N
A
N
AN
AN
AN
AN
AN
AN
AN
AN
AN
ANANANANA
7/
9
/
2
0
1
3
17
0
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.
0
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6
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0
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0
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1
4
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.
1
29
5
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0
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4/
1
0
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2
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3
16
0
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0
5
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<0
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0
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0
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1
3
<0
.
1
31
0
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0
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9400.41NANA
1/
1
4
/
2
0
1
3
17
0
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5
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0
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9
<
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0
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1
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1
30
5
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0
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10
/
2
9
/
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0
1
2
16
0
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.
0
5
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0.
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7
4
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.
0
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.
1
3
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.
1
28
0
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0
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9500.56NANA
7/
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3
/
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0
1
2
17
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0
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1/
1
1
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9300.32NANA
7/26/2011N
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7/
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9500.88NANA
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10
/
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10/21/2010N
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ANANANANA
7/
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7
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10
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9203.220.0041245
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1
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9906.760.0029342
3/
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NA
0.
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NA
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6/
9
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7
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3
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NA
0.
0
2
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NA
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NANANANA
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Item 11.a. - Page 111
We
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Co
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To
p
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f
C
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D
)
Da
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De
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W
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(f
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)
Gr
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w
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El
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v
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(f
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N
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)
To
t
a
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D
i
s
s
o
l
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d
So
l
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s
(m
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/
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)
Ch
l
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(m
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/
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)
So
d
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m
(m
g
/
L
)
Po
t
a
s
s
i
u
m
(m
g
/
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)
Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
/
1
2
E
-
2
4
B
0
3
Sc
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N
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NA
66
0
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52
4.
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10
.
7
0
1
/
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7
7
NA
NA
NA
NA
NANANA
10
.
7
1
0
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1
5
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2
0
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3
N
A
NA
72
0
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51
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10040310
10
/
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NA
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7/
9
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2
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.
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11
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9134310
7/
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6
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1
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.
1
7
10
.
4
1
NA
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7/
2
5
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0
1
1
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NA
65
0
46
.
3
50
6.
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9838310
4/
2
0
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1
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5
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5.
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8733320
10
/
2
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0
1
0
N
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NA
66
0
44
48
3.
8
11039315
10
/
2
1
/
2
0
1
0
4
.
6
0
8.
9
8
NA
NA
NA
NA
NANANA
7/
2
7
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2
0
1
0
4
.
5
4
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0
4
61
0
44
51
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4/
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1
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2
7
66
6
45
53
.
2
4.
8
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11844357
1/
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7
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5.
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10
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1
9
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0
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0
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8
9
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2
40
55
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1
3.
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11042.6342
8/
1
9
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2
0
0
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4
.
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6.
5
2
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54
.
9
5.
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12843.4337
5/
1
2
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2
0
0
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3
.
1
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7.
5
2
64
5
44
53
.
2
4.
5
3
10841.8332
3/
2
6
/
1
9
9
6
N
A
NA
64
6
41
52
4.
3
10442412
6/
9
/
1
9
7
6
N
A
NA
56
9
36
53
3.
7
8539330
1/
1
7
/
1
9
6
6
N
A
NA
67
0
79
74
5
10336345
He
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B
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c
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d
,
D
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e
p
Item 11.a. - Page 112
Da
t
e
Su
l
f
a
t
e
(m
g
/
L
)
Ni
t
r
a
t
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(m
g
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L
)
To
t
a
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K
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l
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Ni
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(m
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Bo
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(m
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)
Fl
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(m
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)
Io
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)
Ma
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m
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c
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
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1
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/
2
0
1
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5
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1/
1
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2
0
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NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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10
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17
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31
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1,0100.2NANA
10/14/2013N
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32
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32
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10
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2
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15
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0
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1,0000.15NANA
11
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7/26/2011N
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10/21/2010N
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NA
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Item 11.a. - Page 113
We
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Co
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To
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(m
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
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20
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N
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53
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10
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7/
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7/
9
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4/
1
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46
0
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4/
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.
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1
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44
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1/
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10
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1/
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11
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7/
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NA
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7/
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8/
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Item 11.a. - Page 114
Da
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Su
l
f
a
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(m
g
/
L
)
Ni
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a
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(m
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To
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K
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Br
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)
Al
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To
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3
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a
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Co
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m
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
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/
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0
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13
6
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1
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NA
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10
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11/21/2011N
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Item 11.a. - Page 115
We
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Co
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El
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(f
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N
A
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Da
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De
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(f
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)
Gr
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El
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(f
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To
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D
i
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s
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l
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d
So
l
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(m
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/
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)
Ch
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(m
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Po
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(m
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
/
1
3
E
-
3
0
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N
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58
0
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2.
7
7631190
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3
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1
/
1
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5
NA
NA
NA
NA
NANANA
20
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4
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1
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2
0
1
3
N
A
NA
57
0
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45
2.
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7533190
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5.
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NA
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7/
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3
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NA
57
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7832190
7/
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1
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NA
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4/
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1
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1
3
N
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NA
59
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41
2.
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7030190
4/
1
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2
0
1
3
1
5
.
7
6
7.
4
NA
NA
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NA
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1/
1
5
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2
0
1
3
N
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NA
55
0
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44
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1/
1
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2
0
1
3
1
5
.
0
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1
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NA
NA
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10
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3
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5
.
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7.
8
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3
4
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6930194
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60
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6830200
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2
1
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.
3
8
8.
7
8
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8
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7/
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59
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61
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/
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.
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.
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7/
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9
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2
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2
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9438280
He
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Item 11.a. - Page 116
Da
t
e
Su
l
f
a
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e
(m
g
/
L
)
Ni
t
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a
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(m
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To
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K
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Fl
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Br
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Al
k
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To
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(a
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a
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Co
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c
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a
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c
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(u
m
h
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/
c
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)
Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
5
/
2
0
1
4
13
6
13
.
1
13
.
4
<0
.
1
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1
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0
.
0
1
0
.
0
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4
0.
4
19
0
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0
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0
890<0.050.0080125
1/
1
4
/
2
0
1
4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
10
/
1
5
/
2
0
1
3
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0
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6
9
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0
.
0
9
9
0.
3
8
19
0
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0
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0
890<0.050.0076132
10/14/2013N
A
N
AN
AN
AN
AN
AN
AN
AN
AN
AN
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7/
1
0
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2
0
1
3
18
0
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0
5
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1
3
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0
.
1
4
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.
1
19
0
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0
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7/
9
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
4/
1
1
/
2
0
1
3
14
0
14
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0
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1
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0
1
0
.
0
8
2
0.
4
3
19
0
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0
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0
880<0.050.0086116
4/
1
0
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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1/
1
5
/
2
0
1
3
14
0
13
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0
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0.
1
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0
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0
.
0
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3
2
20
0
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0
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0
8800.120.0064156
1/
1
4
/
2
0
1
3
NA
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1/
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7/26/2011N
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AN
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10/21/2010N
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Item 11.a. - Page 117
We
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Po
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
/
1
3
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NA
NA
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20
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1
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67
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7/
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4/
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1
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1
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67
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36
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4/
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0
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1/
1
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2
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1
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63
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1/
1
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0
1
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1
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.
6
2
10
.
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10
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10043280
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7/
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6
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Item 11.a. - Page 118
Da
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Su
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(m
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Ni
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(u
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
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Item 11.a. - Page 119
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Item 11.a. - Page 120
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
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11
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Item 11.a. - Page 121
We
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
S
/
1
3
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2
6
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8
7
NA
NA
NA
NA
NANANA
13
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5
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/
1
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/
2
0
1
3
N
A
NA
58
0
60
57
3.
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7132170
10
/
1
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NA
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7/
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2
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1
3
N
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NA
59
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48
3.
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7131160
7/
9
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1
3
1
0
.
3
6
5.
7
7
NA
NA
NA
NA
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4/
1
0
/
2
0
1
3
8
.
2
6
7.
8
7
60
0
66
53
3.
3
6931160
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1
4
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1
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7
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2
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66
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6830165
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6428140
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8.
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4
NA
NA
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7/
2
5
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2
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1
1
N
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NA
59
0
67
47
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72.932.2122
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7835150
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6
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Item 11.a. - Page 122
Da
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
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2
0
1
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14
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9100.10.0068146
10/14/2013N
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7/
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7/
9
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2
0
1
3
NA
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NA
NA
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NA
NA
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4/
1
0
/
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1
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15
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6/
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5
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1/21/19662
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Item 11.a. - Page 123
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
32
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4
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1
4
9
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3
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6.
8
3
NA
NA
NA
NA
NANANA
13
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1
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2
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1
3
N
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NA
1,
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46
70
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14058190
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7/
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3
N
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NA
1,
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0
50
61
4.
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14059185
7/
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3
1
1
.
0
5
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NA
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4/
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3
7
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6
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0
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1,
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48
60
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12052185
1/
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4
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11
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11
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7/
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N
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1,
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5
0
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Item 11.a. - Page 124
Da
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Su
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(m
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L
)
Ni
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
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NA
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10
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7/
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7/
9
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2
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NA
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4/
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10
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11
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Item 11.a. - Page 125
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Po
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
Oc
e
a
n
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MW
-
G
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n
Sc
r
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1
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90
0
57
66
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11050240
34
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3
1
/
1
4
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2
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1
4
2
8
.
5
5
6.
0
8
NA
NA
NA
NA
NANANA
10
/
1
6
/
2
0
1
3
N
A
NA
69
0
30
40
3.
4
0
10049340
10
/
1
4
/
2
0
1
3
3
0
.
3
1
4.
3
2
NA
NA
NA
NA
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7/
1
1
/
2
0
1
3
N
A
NA
86
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60
50
4.
4
0
11047240
7/
9
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2
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1
3
2
9
.
9
8
4.
6
5
NA
NA
NA
NA
NANANA
4/
1
1
/
2
0
1
3
N
A
NA
90
0
60
69
4.
6
0
11047250
4/
1
0
/
2
0
1
3
2
3
.
3
0
11
.
3
3
NA
NA
NA
NA
NANANA
1/
1
6
/
2
0
1
3
N
A
NA
82
0
66
76
5.
0
0
10047260
1/
1
4
/
2
0
1
3
2
3
.
5
9
11
.
0
4
NA
NA
NA
NA
NANANA
10
/
3
0
/
2
0
1
2
2
7
.
3
1
7.
3
2
78
0
65
75
4.
7
0
10046255
7/
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2
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1
2
2
7
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1
5
7.
4
8
83
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76
80
5.
3
0
9645250
4/
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9
/
2
0
1
2
N
A
NA
79
0
87
69
4.
5
0
5237250
4/
1
8
/
2
0
1
2
2
1
.
6
5
12
.
9
8
NA
NA
NA
NA
NANANA
1/
1
2
/
2
0
1
2
2
3
.
2
9
11
.
3
4
76
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76
85
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7940270
11
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9643320
7/
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6
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2
0
1
1
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5
1
9.
1
2
NA
NA
NA
NA
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7/
2
5
/
2
0
1
1
N
A
NA
76
0
69
.
3
66
6.
4
0
8035310
4/
2
0
/
2
0
1
1
1
1
4
.
7
9
-
8
0
.
1
6
NA
NA
NA
NA
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1/
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4
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1
1
1
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6
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5
9
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7
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6
31
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22
8.
1
349.219.0
10
/
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2
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N
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29
0
81
26
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3
6411160.0
10
/
2
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2
0
1
0
1
1
2
.
7
1
-
8
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.
2
2
NA
NA
NA
NA
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7/
2
6
/
2
0
1
0
9
5
.
6
1
-6
5
.
1
2
43
8
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1.
9
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61.730.430.0
4/
2
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3
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4
1
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7
5.
7
86.148.362
1/
2
7
/
2
0
1
0
4
3
.
7
1
-1
3
.
2
2
46
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13
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0
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4
682124112
10
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92
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6
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19.245.176.8
8/
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16
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49.920.417.6
5/
1
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1
9
8
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1
5
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8
0
14
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6
9
66
5
35
40
NA
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Item 11.a. - Page 126
Da
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Su
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Ni
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(u
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
6
/
2
0
1
4
36
0
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.
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0.
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0.
2
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2
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.
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<1
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<1
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1,2606.0NANA
1/
1
4
/
2
0
1
4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
10
/
1
6
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3
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3
<0
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1
34
0
<1
0
<1
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1,0507.4NANA
10/14/2013N
A
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AN
AN
AN
AN
AN
AN
AN
ANANANANA
7/
1
1
/
2
0
1
3
34
0
<0
.
0
5
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0.
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8
0.
1
5
0.
0
2
0.
2
8
<0
.
1
24
0
<1
0
<1
0
1,2304.9NANA
7/
9
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
4/
1
1
/
2
0
1
3
35
0
0.
8
2
<1
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2
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1
2
0.
0
3
0.
2
8
<0
.
2
25
0
<1
0
<1
0
1,2505.7NANA
4/
1
0
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
1/
1
6
/
2
0
1
3
32
0
<0
.
1
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2
1
0.
1
3
<0
.
0
1
0
.
3
1
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.
2
26
0
<1
0
<1
0
1,2304.2NANA
1/
1
4
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
10
/
3
0
/
2
0
1
2
28
0
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.
0
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1
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.
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31
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.
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1,2206.7NANA
4/
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9
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2
0
1
2
27
0
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.
1
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0.
1
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2
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.
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4/
1
8
/
2
0
1
2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
1/
1
2
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2
0
1
2
19
0
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.
1
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2
3
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0.
0
6
9
0.
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11
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2
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1
1
18
0
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.
0
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0
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7/26/2011N
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7/
2
5
/
2
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1
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0
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1,1705.30.0029348
4/20/2011N
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1/
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480100.0064156
10
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NA
0.
8
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0.
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16
0
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0
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0
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0
520380.0044225
10/21/2010N
A
N
AN
AN
AN
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AN
AN
AN
AN
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ANANANANA
7/
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6
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2
0
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0
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0
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0
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690360.0038266
4/
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.
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0.
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.
0
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.
0
<
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.
0
8802330.0037268
1/
2
7
/
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0
1
0
10
0
0.
5
6
NA
<
0
.
0
2
0
0
0
.
2
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32
.
4
0.
4
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11
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10
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59011.40.0042236
8/
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NA
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6
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5/
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/
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NA
NA
0.
2
NA
0.
0
1
NA
36
0
ND
ND
9500.10NANA
A-
1
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D
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Item 11.a. - Page 127
We
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r
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To
p
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v
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(f
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)
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a
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s
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l
v
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d
So
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/
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Ch
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(m
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)
So
d
i
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m
(m
g
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Po
t
a
s
s
i
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m
(m
g
/
L
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
Oc
e
a
n
o
MW
-
B
l
u
e
Sc
r
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e
n
e
d
f
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m
1
9
0
-
2
1
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a
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d
2
4
5
-
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'
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3
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30
.
5
4
-4
.
0
9
1
/
1
6
/
2
0
1
4
N
A
NA
35
0
12
2
89
15
21868
34
.
6
3
1
/
1
4
/
2
0
1
4
2
7
.
8
6
6.
7
7
NA
NA
NA
NA
NANANA
10
/
1
6
/
2
0
1
3
N
A
NA
36
0
10
0
98
20
3.11566
10
/
1
4
/
2
0
1
3
3
0
.
9
8
3.
6
5
NA
NA
NA
NA
NANANA
7/
1
1
/
2
0
1
3
N
A
NA
37
0
14
0
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6.
3
42382
7/
9
/
2
0
1
3
2
9
.
3
6
5.
2
7
NA
NA
NA
NA
NANANA
4/
1
1
/
2
0
1
3
N
A
NA
34
0
90
81
14
2.91878
4/
1
0
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2
0
1
3
2
4
.
4
5
10
.
1
8
NA
NA
NA
NA
NANANA
1/
1
6
/
2
0
1
3
N
A
NA
36
0
10
7
99
7.
1
3.324110
1/
1
4
/
2
0
1
3
2
3
.
1
4
11
.
4
9
NA
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NA
NA
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10
/
3
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2
0
1
2
2
7
.
6
8
6.
9
5
38
0
97
10
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4
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8
7.
4
5
24
0
49
56
11
5.42299
4/
1
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2
0
1
2
N
A
NA
38
0
10
0
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5.
5
3.526150
4/
1
8
/
2
0
1
2
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0
.
1
0
14
.
5
3
NA
NA
NA
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1/
1
2
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2
0
1
2
2
2
.
2
6
12
.
3
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48
0
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11
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9
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4.
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7/
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.
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9
9.
3
4
NA
NA
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NA
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7/
2
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2
0
1
1
N
A
NA
26
0
29
.
3
23
5.
3
8.72084
4/
2
1
/
2
0
1
1
N
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NA
58
0
11
8
70
19
49178.8
4/
2
0
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2
0
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1
2
2
.
5
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12
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NA
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1/
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4
/
2
0
1
1
2
4
.
8
7
9.
7
6
68
0
11
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10
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20850.78.4
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7
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NA
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Item 11.a. - Page 128
Da
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Su
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(m
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/
L
)
Ni
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(m
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Al
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,
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(m
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(u
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
6
/
2
0
1
4
42
<0
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0
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.
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7102.30.0039254
1/
1
4
/
2
0
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4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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10
/
1
6
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1
3
36
<0
.
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0
5
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8
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9
73
<1
0
7104.10.0038263
10/14/2013N
A
N
AN
AN
AN
AN
AN
AN
AN
AN
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ANANANANA
7/
1
1
/
2
0
1
3
40
0.
4
<1
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2
0.
1
1
0.
1
1
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0
4
3
0.
4
4
11
7
35
<1
0
7303.20.0031318
7/
9
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
4/
1
1
/
2
0
1
3
30
<0
.
0
5
<1
0.
1
9
0.
1
2
0.
0
7
0.
0
4
6
0.
3
15
5
77
.
5
<1
0
6503.20.0033300
4/
1
0
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
1/
1
6
/
2
0
1
3
36
<0
.
0
5
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2
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1
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0
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0
.
0
4
8
0.
4
16
5
55
<1
0
7203.70.0037268
1/
1
4
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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10
/
3
0
/
2
0
1
2
38
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.
0
5
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2
8
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.
1
0.
1
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0
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16
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7/
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5
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2
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6
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0
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7501.60.0068147
4/
1
8
/
2
0
1
2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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1/
1
2
/
2
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7/26/2011N
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4/20/2011N
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10
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.
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0
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25
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A-
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C
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D
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h
a
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w
Item 11.a. - Page 129
We
l
l
Co
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s
t
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c
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n
To
p
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f
C
a
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g
El
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v
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(f
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N
A
V
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Da
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De
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W
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(f
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)
Gr
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w
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v
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(f
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N
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To
t
a
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D
i
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s
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d
So
l
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s
(m
g
/
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)
Ch
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(m
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So
d
i
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m
(m
g
/
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Po
t
a
s
s
i
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m
(m
g
/
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)
Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
Oc
e
a
n
o
MW
-
S
i
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r
Sc
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n
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d
f
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3
9
5
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1
5
1
/
1
4
/
2
0
1
4
3
7
.
7
8
6.
8
5
NA
NA
NA
NA
NANANA
34
.
6
3
1
0
/
1
4
/
2
0
1
3
3
0
.
9
2
3.
7
1
NA
NA
NA
NA
NANANA
7/
9
/
2
0
1
3
3
0
.
9
1
3.
7
2
NA
NA
NA
NA
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4/
1
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/
2
0
1
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6
.
0
8
8.
5
5
NA
NA
NA
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1/
1
4
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2
0
1
3
2
3
.
1
2
11
.
5
1
NA
NA
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NA
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10
/
3
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/
2
0
1
2
2
7
.
1
4
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4
9
NA
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7/
2
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2
0
1
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2
7
.
6
8
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9
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4/
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.
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3
14
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5
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1/
1
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1
2
2
3
.
0
0
11
.
6
3
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11
/
2
1
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2
0
1
1
2
2
.
8
5
11
.
7
8
NA
NA
NA
NA
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7/
2
6
/
2
0
1
1
2
5
.
2
3
9.
4
NA
NA
NA
NA
NANANA
4/
2
1
/
2
0
1
1
N
A
NA
41
0
97
10
0
7.
2
3.52180
4/
2
0
/
2
0
1
1
2
1
.
2
7
13
.
3
6
NA
NA
NA
NA
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1/
2
4
/
2
0
1
1
2
2
.
0
2
12
.
6
1
44
0
92
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10
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2
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0
90
11
0
15
6.83294
7/
2
6
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2
0
1
0
2
4
.
2
4
6.
2
4
47
8
83
10
9
5.
9
4
52.930.4122.0
4/
2
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/
2
0
1
0
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9
.
0
4
11
.
4
4
45
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Item 11.a. - Page 130
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10/30/2012N
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11/21/2011N
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Item 11.a. - Page 131
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#
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#
8
Item 11.a. - Page 132
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(m
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#
8
Item 11.a. - Page 133
We
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
Oc
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a
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MW
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NA
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10
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N
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41
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7/
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N
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42
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4.
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4.535116
7/
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NA
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4/
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N
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NA
45
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77
77
4.
7
5.838113
4/
1
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1/
1
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N
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NA
42
0
74
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4.
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7.040110
1/
1
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2
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NA
NA
NA
NA
NANANA
10
/
3
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7
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7.
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N
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39
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NA
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7/
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N
A
NA
42
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7
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7.
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4.431148
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2
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38
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3
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NA
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1/
2
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.
0
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12
.
6
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NA
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Item 11.a. - Page 134
Da
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Su
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Ni
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Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
6
/
2
0
1
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10
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7400.300.0038262
1/
1
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2
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NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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10
/
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6
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7600.280.0036280
10/14/2013N
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AN
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AN
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AN
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ANANANANA
7/
1
1
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2
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12
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6
20
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7600.190.0026381
7/
9
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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4/
1
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2
0
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3
15
0
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0.
2
12
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15
<1
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7800.150.0026385
4/
1
0
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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1/
1
5
/
2
0
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3
18
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12
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15
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8100.55NANA
1/
1
4
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
10
/
3
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2
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63
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0
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7500.840.0021470
4/
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7900.240.0035282
4/
1
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2
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NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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1/
1
2
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11
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7300.650.0032313
7/26/2011N
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7/
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4/20/2011N
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1/
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Item 11.a. - Page 135
We
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Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
12
N
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6
W
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91
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9
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3
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3
7
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4
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NA
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4/
1
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1
3
N
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89
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1/
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10
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Item 11.a. - Page 136
Da
t
e
Su
l
f
a
t
e
(m
g
/
L
)
Ni
t
r
a
t
e
(m
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/
L
)
To
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a
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K
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d
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Ni
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(m
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Bo
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(m
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Fl
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(m
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Ma
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(m
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/
L
)
Br
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(m
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L
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Al
k
a
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,
To
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(a
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C
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C
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3
)
(m
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)
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(a
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(m
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(m
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Co
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c
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a
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c
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(u
m
h
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s
/
c
m
)
Iron (mg/L)Bromide /ChlorideRatioChloride/Bromide Ratio
1/
1
6
/
2
0
1
4
41
6
1.
0
0
1.
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0.
1
4
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.
2
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18
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1/
1
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2
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1
4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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10
/
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17
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1,210<0.05NANA
10/14/2013N
A
N
AN
AN
AN
AN
AN
AN
AN
AN
AN
ANANANANA
7/
1
0
/
2
0
1
3
43
0
0.
7
8
<1
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.
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1,2100.18NANA
7/
9
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
4/
1
1
/
2
0
1
3
42
0
0.
8
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1
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2
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.
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1,200<0.05NANA
4/
1
0
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
1/
1
5
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2
0
1
3
44
0
0.
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7
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2
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0
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0
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2
17
8
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1,1900.13NANA
1/
1
4
/
2
0
1
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
10
/
3
1
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2
0
1
2
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7/
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4
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4/
2
0
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2
0
1
2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NANANANA
4/
1
8
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0
1
2
45
0
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1,190<0.1NANA
1/
1
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0
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38
0
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17
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1,190<0.1NANA
11
/
2
1
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0
1
1
38
0
0.
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1
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18
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1,200<0.1NANA
7/26/2011N
A
N
AN
AN
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7/
2
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1,2000.024NANA
4/
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41
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4/20/2011N
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1/
2
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10
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NA
<
0
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1,213<0.1NANA
7/
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4/
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10
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1
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1
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NA
0.
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NA
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6/
8
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A-
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C
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D
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Item 11.a. - Page 137
We
l
l
Co
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s
t
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c
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n
To
p
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f
C
a
s
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El
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v
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(f
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N
A
V
D
)
Da
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De
p
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W
a
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(f
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)
Gr
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w
a
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r
El
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v
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(f
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N
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To
t
a
l
D
i
s
s
o
l
v
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d
So
l
i
d
s
(m
g
/
L
)
Ch
l
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(m
g
/
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)
So
d
i
u
m
(m
g
/
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)
Po
t
a
s
s
i
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m
(m
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L
)
Calcium (mg/L)Magnesium (mg/L)Bicarbonate (asCaCO3)(mg/L)
12
N
/
3
6
W
-
3
6
L
0
2
Sc
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26
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7
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2.
7
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1
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1
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2
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1
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N
A
NA
80
0
10
0
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5
7633270
23
.
9
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1
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1
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7
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NA
NA
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24
.
0
1
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1
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3
N
A
NA
81
0
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11
0
6.
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9140260
10
/
1
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2
0
1
3
2
3
.
9
4
2.
8
3
NA
NA
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7/
1
0
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2
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1
3
N
A
NA
79
0
10
5
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5.
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8838260
7/
9
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2
0
1
3
2
3
.
1
5
3.
6
2
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4/
1
1
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2
0
1
3
N
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NA
83
0
10
0
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2
8337260
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1
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0
1
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1
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3
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11
.
4
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1/
1
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2
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1
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77
0
11
0
11
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7
8438265
1/
1
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1
3
1
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2
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15
.
5
3
NA
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10
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1
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9
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7
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7
4
NA
NA
NA
NA
NANANA
7/
2
5
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2
0
1
1
N
A
NA
79
0
12
8
.
8
11
0
9.
1
7433280
4/
2
1
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1
N
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77
0
12
0
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5.
3
8626280
4/
2
0
/
2
0
1
1
1
0
.
3
3
16
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4
4
NA
NA
NA
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1/
2
4
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2
0
1
1
9
.
3
7
16
.
9
2
80
0
12
0
95
7.
6
7530300
10
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7
7
6.
5
2
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0
12
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6
8944275
7/
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0
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3
5.
7
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7
11
0
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Item 11.a. - Page 141
Final Draft Strategic Plan
for the
Northern Cities Management Area Technical Group
Prepared for:
City of Arroyo Grande
City of Grover Beach
Oceano Community Services District
City of Pismo Beach
June 3, 2014
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ATTACHMENT 2
Item 11.a. - Page 142
Northern Cities Management Area Technical Group
Final Draft Strategic Plan
ii
ACKNOWLEDGEMENTS
The Northern Cities Management Area Technical Group Strategic Plan was prepared through a
cooperative effort of the following members of the Technical Group.
Teresa McClish, AICP Gregory Ray, P.E. OCSD Staff Benjamin Fine, P.E.
Shane Taylor
Geoff English
Additional contribution was provided by:
Paul Sorensen, CEG, C,Hg. Sam Schaefer, P.E.
Facilitated By:
Jeffery Szytel, P.E.
Daniel Heimel, P.E.
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Northern Cities Management Area Technical Group Introduction and Purpose
Final Draft Strategic Plan
1
1 INTRODUCTION AND PURPOSE
The Northern Cities Management Area Technical Group (NCMA TG) developed the NCMA TG Strategic
Plan (Strategic Plan) for the purpose of providing the NCMA TG with:
A Mission Statement to guide future initiatives;
A framework for communicating water resource goals; and
A formalized Work Plan for the next 10 years
The Strategic Plan was developed over a series of Strategic Planning Sessions and NCMA TG Meetings and
is organized into the following sections:
Acknowledgements
1 Introduction and Purpose
2 Background
3 Mission Statement
4 Objectives of the NCMA TG
5 Strategic Initiatives
6 Implementation Plan
7 Conclusions and Recommendations
Appendix A. Boundary Maps
Appendix B. Related Organizations
Appendix C. NCMA TG Initiatives
2 BACKGROUND
The Northern Cities, comprised of the Oceano Community Services District and the Cities of Arroyo
Grande, Grover Beach and Pismo Beach, have a long history of cooperative management of their shared
water resources, and continue to actively work together to manage groundwater and surface water
supplies for a population of approximately 46,000 residents and hundreds of thousands of visitors each
year. The service areas for each of the Northern Cities are shown in Appendix A. The Northern Cities
initiated collaborative management of the Santa Maria Groundwater Basin (SMGB) in 1983, with the
development of the Agreement Regarding Management of the Arroyo Grande Groundwater Basin
(Gentlemen’s Agreement). The Gentlemen’s Agreement defined the safe yield for the Northern Cities
portion of the SMGB and allocated the available water to the urban and agricultural users.
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Northern Cities Management Area Technical Group Mission Statement
Final Draft Strategic Plan
2
In 1997, the SMGB became subject to litigation and in 2002 the Northern Cities, the Northern Landowners,
and Other Parties entered into a Settlement Agreement, which reaffirmed the Gentlemen’s Agreement.
Subsequently, the Northern Cities and other Parties entered into the 2005 Stipulation, which formally
divided the SMGB into three management areas: the Northern Cities Management Area (NCMA); the
Nipomo Mesa Management Area (NMMA); and the Santa Maria Valley Management Area (SMVMA). The
boundaries of each of the management areas are shown in Appendix A. The Superior Court of California
later adopted the Stipulation in its January 25, 2008 Judgment After Trial (Judgment). On November 21,
2012, the California Court of Appeal (Sixth Appellate District) upheld the Superior Court’s Judgment. The
California Supreme Court later refused to hear the case – upholding the Appellate Court’s decision.
The Stipulation requires that each Management Area develop a monitoring program that must include
data collection and monitoring sufficient to determine land and water uses within the management area,
sources of supply to meet those uses, groundwater conditions including groundwater level and quality,
the amount and disposition of Developed Water supplies, and the amount and disposition of other
sources of water supply. This information must be presented to the Court in an annual report that
summarizes the results of the monitoring program, changes in groundwater supplies and any threats to
groundwater supplies. In 2009, the Northern Cities formed the Northern Cities Management Area
Technical Group (NCMA TG), comprised of technical staff from each of the agencies and selected
consultants, to coordinate their efforts for the monitoring program and the annual report.
As part of their collaborative management, the Northern Cities split the costs for the monitoring program,
the annual report and staff extension services, based upon each agency’s percentage of the groundwater
basin safe yield. The NCMA TG’s operating budget for these tasks is approximately $200,000 per year.
The overall annual budget varies year to year based upon the different initiatives pursued by the NCMA
TG.
In addition to the preparation of the Annual Report, the NCMA TG works collaboratively with the other
jurisdictions and regional groups to manage water supplies within southern San Luis Obispo County.
Appendix B outlines the NCMA TG’s relationship with the related agencies, groups, committees,
organizations, agreements and initiatives. In coordination with the other regional groups and on its own,
the NCMA TG actively pursues opportunities to enhance the sustainability of water supply resources
within the NCMA. A summary of complete and ongoing NCMA TG initiatives is provided in Appendix A.
3 MISSION STATEMENT
The NCMA TG developed the following Mission Statement to help guide ongoing initiatives and to capture
the requirements outlined in the Gentlemen’s Agreement, Settlement Agreement and the Stipulation:
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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Northern Cities Management Area Technical Group Objectives of the NCMA TG
Final Draft Strategic Plan
3
4 OBJECTIVES OF THE NCMA TG
Through the strategic planning process, the NCMA TG identified several key objectives to guide future
efforts. These objectives include:
1. Enhance Water Supply Reliability
o Prepare the Northern Cities for prolonged drought conditions
o Develop coordinated response plan for salt water intrusion and other supply emergencies
o Analyze impacts of pumping on the groundwater basin
o Better protect against threats to groundwater sustainability
2. Improve Water Resource Management
o Update the 2002 Settlement Agreement
o Develop more formalized structure/governance for the NCMA TG
3. Increase Effective Outreach
o Engage agriculture stakeholders
o Improve coordination with SLOCFC&WCD and other regional efforts
o Increase communication with City Council & Board of Directors
5 STRATEGIC INITIATIVES
The NCMA TG utilized a screening and objective ranking process to develop prioritized strategies for
improving the sustainability of water resources in the NCMA. Initially the TG developed a list of potential
initiatives to consider during the screening process. Subsequently, the TG developed seven (7) criteria to
rank the initiatives. Utilizing these criteria, each of the initiatives was ranked independently on a scale
from one (low score) to three (high score). Upon completion of the independent scoring and prior to
reviewing the results, weighting factors were applied to each of the evaluation criteria. The combination
of the ranking for each criteria and the weighting factor for that criteria were then utilized to develop the
scoring for each initiative. Table 1 lists the Evaluation Criteria and the Weighting Factors utilized for the
strategic initiative screening.
Table 1. Evaluation Criteria
Evaluation Criteria Weighting Factor
Reliability Enhancement 3
Cost Effectiveness 2
Enhanced Management 3
Jurisdictional Alignment 1
Outside Stakeholder Interest 1
Feasibility 2
Sustainability 3
After the initial ranking was completed, the initiatives were grouped based on common strategies and
then sequenced according to the order that they would need to be completed in. Table 2 lists the key
strategies developed by the NCMA TG.
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Northern Cities Management Area Technical Group Strategic Initiatives
Final Draft Strategic Plan
4
Table 2. NCMA TG Key Strategies
Key Strategies Strategic Initiative Description Reliability
Enhancement
Cost
Effectiveness
Enhanced
Management
Jurisdictional
Alignment
Outside
Stakeholder
Interest
Feasibility Sustainability Total
Weighting Factor 3 2 3 1 1 2 3
Enhance
Management of
NCMA
Groundwater
1
a Groundwater Model Develop a groundwater model for
the NCMA or the entire SMGB 3 2 3 3 2 1 2 35
b Monitoring well
Coordinate with the County and
the NMMA to develop new
monitoring well(s) within the
SMGB
1 2 2 3 3 2 3 32
c SNMP
Develop a Salt and Nutrient
Management Plan for the
NCMA/NMMA
2 3 2 3 3 3 2 36
d Groundwater Storage
Develop and implement a
framework for groundwater
storage/conjunctive use, including
return flows
3 3 3 3 3 3 3 45
e Management
Agreement
Update the 2002 Agreement
Regarding Management of the
Arroyo Groundwater Basin
1 1 2 3 1 1 1 20
Improve Inter-
agency
Coordination
2
a Intertie Plan Develop and implement an inter-
agency intertie plan 3 3 3 3 1 3 3 43
b Inter-agency Mutual
Aid Agreements
Develop mutual aid agreements
for emergency water supply
scenarios
2 3 1 1 1 2 3 30
c Communication Plan Develop a communication plan
for the NCMA 1 2 2 3 3 3 3 34
d Coordinated
Conservation Program
Developed a coordinated
conservation program 1 3 3 3 1 2 3 35
Develop
Supplemental
Supply
3
a Supplemental Water
Strategy
Evaluate alternative water supply
strategies including: Recycled
Water, etc.
3 3 3 3 2 3 2 41
b
Implement a
Supplemental Water
Supply
Develop 1,500 AFY of permanent
supplemental water supply within
10 years
3 2 3 2 2 2 2 36
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Northern Cities Management Area Technical Group Strategic Initiatives
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Key Strategies Strategic Initiative Description Reliability
Enhancement
Cost
Effectiveness
Enhanced
Management
Jurisdictional
Alignment
Outside
Stakeholder
Interest
Feasibility Sustainability Total
Weighting Factor 3 2 3 1 1 2 3
Improve Water
Management
Governance
4
a Improve inter-agency
coordination
Improve involvement and
coordination within the NCMA
agencies and to include the
County
1 3 3 3 3 3 3 39
b Ag outreach
Coordinate with the Ag/Farm
Bureau; encourage conservation;
develop a formalized structure
1 3 2 2 3 2 1 27
c
Northern Cities
Governance/Legal
Framework
Evaluate options for NCMA
structure/governance and report
to Councils/Boards for direction
3 3 3 2 2 1 3 39
Develop Regional
UWMP and Water
Shortage
Contingency Plan
5
a Regional UWMP Coordinated UWMP for the
Northern Cities 1 3 3 2 1 3 3 36
b Water Shortage
Contingency Plan
Develop a coordinated plan of
action to respond to a severe
water shortage condition within
the NCMA; including
consideration for individual
scenarios
1 3 3 3 2 3 3 38
Enhance
Management of
Surface Water1
6
a
Optimize Existing
Surface Water
Supplies, including
surface water storage.
Develop a framework for inter-
agency exchanges & transfers,
including SWP & Lopez supplies
2 3 3 2 2 2 2 35
b Maximize Lopez
Pipeline Capacity
Develop project(s) to expand
Lopez Pipeline capacity 2 3 3 2 1 3 2 36
c Improve Lopez WTP
Capacity and Reliability
Develop & support initiatives to
improve capacity of Lopez WTP 2 3 3 2 1 3 2 36
1 The Enhanced Management of Surface Water strategy was develop at a follow-up meeting to the NCMA TG Strategic Planning Session #1.
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Northern Cities Management Area Technical Group Implementation Plan
Final Draft Strategic Plan
6
6 IMPLEMENTATION PLAN
Utilizing the ranked and grouped initiatives, the NCMA TG developed an implementation plan for the key
strategies. Included in the implementation plan are the required actions to complete each initiative, key
participants, the NCMA lead, an estimated budget and an implementation time frame. The short-term
time frame designation refers to initiatives that could be completed within 5 years. The long-term time
frame refers to initiatives that are anticipated to take longer than 5 years to implement. Table 3 includes
the details for the Implementation Plan developed by the NCMA TG and Figure 1 shows how the key
strategies within the Implementation Plan are sequenced and are interconnected with other ongoing
initiatives.
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Northern Cities Management Area Technical Group Implementation Plan
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Table 3. Implementation Plan
Key Strategies Strategic
Initiative Description Required Actions Key Participants NCMA
Lead
Estimated
NCMA
Budget
(Costs in 2014
Dollars)
Time
Frame
Enhance Management of
NCMA Groundwater 1
a Groundwater Model Develop a groundwater model for the
NCMA or the entire SMGB
1. Define model objectives
2. Complete SMGB Characterization
3. Obtain Scalmanini Model
4. Identify funding
5. Potential interim steps
6. RFP(s)
NCMA agencies,
NMMA agencies,
SMVMA agencies,
SLOCFC&WCD
NCMA TG $650,000 Short-
Term
b Monitoring well
Coordinate with the County and the
NMMA to develop new monitoring
well(s) within the SMGB
1. Confirm location(s)
2. Confirm project budget
3. Finalize cost-share
4. Support SLOCFC&WCD in project
implementation.
NCMA agencies,
NMMA agencies,
SLOCFC&WCD
NCMA TG $15,000 Short-
Term
c SNMP
Develop a Salt and Nutrient
Management Plan for the
NCMA/NMMA
1. Complete SMGB Characterization
2. Develop RFP
NCMA agencies,
SLOCFC&WCD,
NMMA agencies,
WRAC,
SMVMA agencies,
SSLOCSD
Pismo Beach
or
SLOCSD
$250,000 Short-
Term
d Groundwater Storage
Develop and implement a framework
for groundwater storage/conjunctive
use, including return flows
1. Complete groundwater model
2a. Permitting/Legal Acquisition
2b. Design
3. Construction
NCMA agencies,
SLOCFC&WCD,
RWQCB,
CDPH,
CCC,
DWR,
SWRCB
NCMA TG,
Managers &
Attorneys
$250,000 Long-
Term
e Management Agreement
Update the 2002 Agreement Regarding
Management of the Arroyo
Groundwater Basin
1. Update (new safe yield, requires
groundwater model) NCMA agencies
NCMA TG,
Managers &
Attorneys
$100,000 Long-
Term Fin
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Northern Cities Management Area Technical Group Implementation Plan
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Key Strategies Strategic
Initiative Description Required Actions Key Participants NCMA
Lead
Estimated
NCMA
Budget
(Costs in 2014
Dollars)
Time
Frame
Improve Inter-agency
Coordination 2
a Intertie Plan Develop and implement a inter-agency
intertie plan
1. Develop RFP(s)
2. Hire consultant
3. Update existing hydraulic models
2. Develop intertie model
3. Develop agreements
4. Design intertie upgrades
5. Construct intertie upgrades
NCMA agencies,
SLOCFC&WCD NCMA TG $34,000 Short-
Term
b Inter-agency Mutual Aid
Agreements
Develop mutual aid agreements for
emergency water supply scenarios 1. Develop agreements NCMA agencies Greg Ray $25,000 Short-
Term
c Communication Plan Develop a communication plan for the
NCMA
1. Identify opportunities
2. Develop plan NCMA agencies NCMA TG In-kind NCMA
agency staff time
Short-
Term
d Coordinated
Conservation Program
Developed a coordinated conservation
program
1. Identify opportunities
2. Develop plan NCMA agencies NCMA TG In-kind NCMA
agency staff time
Short-
Term
Develop Supplemental
Supply 3
a Supplemental Water
Strategy
Evaluate alternative water supply
strategies including: Recycled Water,
etc.
1. Develop RFP
2. Hire consultant
3. Complete Alternative Water Supply
Study
NCMA agencies,
SLOCFC&WCD NCMA TG $50,000 Short-
Term
b
Implement a
Supplemental Water
Supply
Develop 1,500 AFY of permanent
supplemental water supply within 10
years
1. Alternatives evaluation
2a. Permitting/Legal acquisition
2b. Design
3. Construction
NCMA agencies,
SLOCFC&WCD,
RWQCB,
CDPH,
CCC,
DWR,
SWRCB
NCMA TG TBD Long-
Term
Improve Water
Management Governance 4
a Improve inter-agency
coordination
Improve involvement and coordination
within the NCMA agencies and to
include the County
1. Develop strategy for informing City
Managers/Attorneys (for example
periodic NCMA TG Meeting to include CM
attendance) 2. Involve the County in the
NCMA TG Meetings
NCMA
agencies,SLOCFC&WCD Greg Ray NA Short-
Term
b Ag outreach
Coordinate with the Ag/Farm Bureau;
encourage conservation; develop a
formalized structure
1. Strategize a message to the ag
community, including key objectives for
the NCMA.
2. Set an introductory meeting with the
ag representatives
3. Create a framework for ongoing
coordination
NCMA agencies,
SLOCFC&WCD,
Ag Representatives
Teresa
McClish $2,000 Short-
Term
c
Northern Cities
Governance/Legal
Framework
Evaluate options for NCMA
structure/governance and report to
Councils/Boards for direction
1. Convene a series of meetings, including
City Managers and Attorneys to discuss
options and alternatives
NCMA TG and Managers,
SLOCFC&WCD NCMA TG In-kind NCMA
agency staff time
Short-
Term
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Northern Cities Management Area Technical Group Implementation Plan
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Key Strategies Strategic
Initiative Description Required Actions Key Participants NCMA
Lead
Estimated
NCMA
Budget
(Costs in 2014
Dollars)
Time
Frame
Develop Regional UWMP
and Water Shortage
Contingency Plan
5
a Regional UWMP Coordinated UWMP for the Northern
Cities
1. Define agency goals and cost share
strategy
2. Develop a scope of work
3. Hire a consultant
4. Develop the plan
NCMA agencies,
SLOCFC&WCD Zone 3 Ben Fine $170,000 Short-
Term
b Water Shortage
Contingency Plan
Develop a coordinated plan of action to
respond to a severe water shortage
condition within the NCMA; including
consideration for individual scenarios
1. Review existing plans
2. Develop shared triggers, strategies and
requirements
3. Develop plan for review and approval
by Board/Councils
NCMA agencies Teresa
McClish $50,000 Short-
Term
Enhance Management of
Surface Water 6
a
Optimize Existing Surface
Water Supplies, including
surface water storage.
Develop a framework for inter-agency
exchanges & transfers, including SWP
& Lopez supplies
1. Get authorization from
Boards/Councils
2. Convene workshops among participant
agencies, SLOCFC&WCD and other
relevant agencies (e.g. CCWA, banking
agencies, etc.)
3. Develop conceptual frameworks
4. Draft agreements
5. Board/Council approvals
NCMA agencies,
SLOCFC&WCD, Zone 3,
CCWA,
Potential other banking
agencies
OCSD Staff $100,000 Long-
Term
b Maximize Lopez Pipeline
Capacity
Develop project(s) to expand Lopez
Pipeline capacity
1. Feasibility & Alternatives Analysis
2. Design
3. Construction
NCMA agencies, Zone 3 Zone 3 Included with Zone
3 budget
See Zone
3 budget
c Improve Lopez WTP
Capacity and Reliability
Develop & support initiatives to
improve capacity of Lopez WTP 1. Support initiatives through Zone 3 NCMA agencies, Zone 3 Zone 3 Included with Zone
3 budget
See Zone
3 budget
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Figure 1. Key Initiative Interconnectivity and Sequencing Flow Chart
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Northern Cities Management Area Technical Group Implementation Plan
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11
6.1 RECOMMENDED BUDGET
Utilizing the time frames and cost estimates from the Implementation Plan, the NCMA TG developed the
following Recommended Strategic Initiative Budget.
Table 4. Recommended Strategic Initiative Budget
Key Strategies Strategic Initiative Short-Term2 Long-Term3
Enhanced
Management of NCMA
Groundwater
1
a Groundwater Model $650,000
b Monitoring well $15,000
c SNMP $250,000
d Groundwater Storage $250,000
e Management
Agreement
$100,000
Improve Inter-agency
Coordination 2
a Intertie Plan $34,000
b Inter-agency Mutual
Aid Agreements
$25,000
c Communication Plan
d Coordinated
Conservation Program
Develop Supplemental
Supply 3
a Supplemental Water
Strategy
$50,000
b
Implement a
Supplemental Water
Supply
TBD
Improve Water
Management
Governance
4
a Advisory Committee
b Ag outreach $8,000
c
Northern Cities
Governance/Legal
Framework
Develop Regional
UWMP and Water
Shortage Contingency
Plan
5
a Regional UWMP $170,000
b
Water Shortage
Contingency Plan
$50,000
Enhance Management
of Surface Water 6
a Optimize Existing
Surface Water Supplies
$100,000
b Maximize Lopez
Pipeline Capacity
c Improve Lopez WTP
Capacity and Reliability
Total $1,252,000 $450,000
2 Short-Term – intended to represent projects that can be completed within 5 years
3 Long-Term – intended to represent projects that will take longer than 5 years to complete
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Northern Cities Management Area Technical Group Conclusions and Recommendations
Final Draft Strategic Plan
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7 CONCLUSIONS AND RECOMMENDATIONS
As a results of the Strategic Planning Process, the NCMA TG developed the following conclusions and
recommendations, in additional to the Key Strategies list above.
Agency Presentations - Presentation of the Strategic Plan to the governing bodies
Cost Sharing – Evaluate cost sharing methodologies and work collaboratively to develop new
methodologies, as appropriate
Budgeting – Develop near-term budgets and present to governing boards for approval
Communication – Continue close communication amongst the NCMA agencies to ensure
consistent messaging to governing boards and the public
Continued Planning - Conduct recurring strategic planning sessions (annual, at a minimum) to
revisit and update the strategic plan
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Northern Cities Management Area Technical Group Appendix A. Boundary Maps
Final Draft Strategic Plan
APPENDIX A. BOUNDARY MAPS
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Northern Cities Management Area Technical Group Appendix A. Boundary Maps
Final Draft Strategic Plan
Figure 2. NCMA Agency Service Area Map
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Northern Cities Management Area Technical Group Appendix A. Boundary Maps
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Figure 3. SMGB Management Area Boundary Map
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Northern Cities Management Area Technical Group Appendix B. Related Organizations
Final Draft Strategic Plan
APPENDIX B. RELATED ORGANIZATIONS
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Northern Cities Management Area Technical Group Appendix B. Related Organizations
Final Draft Strategic Plan
Table 5. Related Organizations
Related Agencies, Groups,
Committees, Organizations,
Agreements, and Initiatives
Description Northern Cities
Participants Relationship to NCMA TG
Nipomo Mesa Management Area
Technical Group (NMMA TG) Technical group tasked with monitoring and reporting on groundwater conditions in the NMMA. None Monitoring party for the neighboring
NMMA
Twitchell Management Authority Management group tasked with monitoring and reporting of groundwater conditions in the Santa Maria Valley Management
Area (SMVMA). None Monitoring party for the SMVMA
SLO County San Luis Obispo County County Government for the NCMA
SLOCFC&WCD District to provide water resource management and flood control services including studies, programs, and weather and
hydrological data collection and compilation.
SLOCFC&WCD Zone 3 District to fund operation of the Lopez Project. All Northern Cities Related organization that the Northern
Cities participate in
SLOCFC&WCD Zone 1/1A District to fund enhanced maintenance and operation efforts of the Arroyo Grande and Los Berros Channels within Zone 1/1A.
OCSD, Arroyo
Grande, Grover
Beach
Related organization that the some of
Northern Cities participate in
Water Resource Advisory Committee
(WRAC)
Advisory Board to advise the County Board of Supervisors concerning all policy decisions related to the water resources of the
SLO County Flood Control & Water Conservation District. All Northern Cities Related organization that the Northern
Cities participate in
Regional Water Management
Working Group (RWMG) Management group to develop and implement the Integrated Regional Water Resources Management Plan Update. All Northern Cities Related organization that the Northern
Cities participate in
Central Coast Water Authority
(CCWA) Joint powers authority responsible for the operation and maintenance of the Polonio Pass WTP and the Coastal Branch Pipeline. None
Wholesale water provider that treats and
delivers SWP water to SLO County and its
SWP sub-contractors
Arroyo Grande Creek Watershed
MOU
Memorandum of Understanding (MOU) amongst 14 agencies to develop recommendations to fund programs and develop
policies for the maintenance, protection, and enhancement of the Arroyo Grande Watershed and the creeks within the
Watershed including the approximate eighty-six (86) square mile area downstream of the Lopez Lake Dam, and including but not
limited to, Arroyo Grande, Los Berros, Newsome Springs, Corbett Canyon/TallyHo, Tar Springs, and Meadow Creeks and sub-
watersheds (collectively the "Watershed"), and to recommend specific roles and responsibilities to implement those programs
and policies
All Northern Cities Related organization that the Northern
Cities participate in
LAFCO
Local Agency Formation Commission with the power to "approve or disapprove with or without amendment, wholly, partially, or
conditionally" proposals concerning the formation of cities and special districts and other changes of jurisdiction or organization
of local government agencies.
None
Commission with authority over local
agency annexations and other changes of
jurisdiction
Coastal San Luis RCD Resource Conservation District that offers a variety of programs to assist farmers, ranchers, landowners and other watershed
users in improving and protecting soil and water resources. None RCD which boundary includes the NCMA
Arroyo Grande Creek Habitat
Conservation Plan (HCP)
Planning documents required as part of an application for an incidental take permit. HCP under the Endangered Species Act
provide a framework for people to complete projects while conserving at-risk species of plants and animals. The Arroyo Grande
Creek HCP is necessary to comply with the Endangered Species Act and is a prerequisite of a State-required amendment to Lopez
Projects water rights permit.
All Northern Cities,
via Zone 3
Related to long-term sustainability of the
Northern Cities surface water supply from
Zone 3
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Northern Cities Management Area Technical Group Appendix C. NCMA TG Initiatives
Final Draft Strategic Plan
APPENDIX C. NCMA TG INITIATIVES
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Item 11.a. - Page 161
Northern Cities Management Area Technical Group Appendix C. NCMA TG Initiatives
Final Draft Strategic Plan
Table 6. NCMA TG Initiatives
NCMA TG Initiatives Description
Quarterly Monitoring Quarterly monitoring of water level and water quality in the NCMA Sentry/Monitoring Wells. Includes continuous water level and
water quality monitoring using pressure, Electroconductivity (EC) and temperature transducers.
Annual Report Development of an Annual Report on groundwater conditions within the NCMA, as required by the Stipulation and Judgment for the
Santa Maria Groundwater Basin.
Lopez Spillway Raise Feasibility study to identify the potential increased yield that could be obtained by raising the Lopez Dam Spillway. Included
identification of potential project constraints and the development of planning level project cost estimates.
Lopez Pipeline Capacity Assessment Studies to determine the capacity of the Lopez pipeline to identify potential opportunities to increase surface water imports to the
NCMA. Performed using a hydraulic model of the Lopez pipeline, calibrated with flow test data.
SMGB Characterization Groundwater basin characterization project to improve the understanding of the geology and the hydrogeology of the NCMA & NMMA
portions of the SMGB. The scope for the SMGB Characterization Project includes the following tasks: Data Analysis; Transducer
Installation; Geologic Cross-sections; Well Testing; Surface Water Installation; Recharge Areas; Offshore Aquifers and Seawater
Intrusion.
Regional Recycled Water Strategic Plan Plan to evaluate potential opportunities to implement recycled water projects at 5 wastewater treatment plants located in San Luis
Obispo County. Included in the plan are evaluation of opportunities for the Pismo Beach Wastewater Treatment Plant and the South
San Luis Obispo County Wastewater Treatment Plant.
New Monitoring Well(s) Investigation into locations for potential future monitoring wells to provide additional groundwater level and water quality data for the
NCMA and the NMMA. Includes potential cost sharing with SLO County and the NMMA TG.
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