HomeMy WebLinkAboutItem 06 - COUNCIL READING FILE_c_Draft GSP Chapters 1-2Draft
Groundwater Sustainability Plan
for the
San Luis Obispo Valley Groundwater Basin
Groundwater Sustainability Agency
Prepared by
8/30/2019
SLO Basin Groundwater Sustainability Plan Table of Contents
County of SLO and City of SLO
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TABLE OF CONTENTS
Table of Contents ........................................................................................................................................... i
List of Figures ............................................................................................................................................... iii
Tables ........................................................................................................................................................... iv
Appendices .................................................................................................................................................... v
List of Terms Used ........................................................................................................................................ vi
Executive Summary ....................................................................................................................................... 1
1 Introduction to the SLO Basin GSP ....................................................................................................... 2
1.1 Purpose of the Groundwater Sustainability Plan .......................................................................... 2
1.2 Description of SLO Basin ............................................................................................................... 2
1.3 Basin Prioritization ........................................................................................................................ 3
2 Agency Information (§ 354.6) .............................................................................................................. 5
2.1 Agencies Names and Mailing Addresses ....................................................................................... 5
2.2 Agencies Organization and Management Structures ................................................................... 7
2.2.1 County of San Luis Obispo ..................................................................................................... 8
2.2.2 City of San Luis Obispo .......................................................................................................... 8
2.2.3 Other Participating Parties in the MOA ................................................................................ 8
2.2.3.1 Edna Valley Growers Mutual Water Company ............................................................. 8
2.2.3.2 Varian Ranch Mutual Water Company ......................................................................... 8
2.2.3.3 Edna Ranch Mutual Water Company ............................................................................ 8
2.2.3.4 Golden State Water Company ...................................................................................... 8
2.3 Authority of Agencies .................................................................................................................... 8
2.3.1 Groundwater Sustainability Agencies ................................................................................... 8
2.3.1.1 County of San Luis Obispo ............................................................................................. 8
2.3.1.2 City of San Luis Obispo .................................................................................................. 9
2.3.2 Memorandum of Agreement ................................................................................................ 9
2.3.3 Coordination Agreements ..................................................................................................... 9
2.4 Contact information for Plan Manager ......................................................................................... 9
3 References .......................................................................................................................................... 11
4 Appendices ......................................................................................................................................... 11
Appendix A - City of San Luis Obispo Resolution to form GSA ............................................................... 11
Appendix B - County of San Luis Obispo Resolution to form GSA .......................................................... 15
Appendix C - Memorandum of Agreement – Preparation of GSP .......................................................... 20
SLO Basin Groundwater Sustainability Plan Table of Contents
County of SLO and City of SLO
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SLO Basin Groundwater Sustainability Plan List of Figures
County of SLO and City of SLO
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LIST OF FIGURES
Figure 1-1: San Luis Obispo Valley Basin and Surrounding Basins. ............................................................... 4
Figure 2-1: San Luis Obispo Valley Basin GSAs and Participating Parties. .................................................... 6
Figure 2-2: Groundwater Sustainability Commission (GSC) ......................................................................... 7
SLO Basin Groundwater Sustainability Plan Tables
County of SLO and City of SLO
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TABLES
No table of figures entries found.
SLO Basin Groundwater Sustainability Plan Appendices
County of SLO and City of SLO
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APPENDICES
A. City of San Luis Obispo Resolution to form GSA
B. County of San Luis Obispo Resolution to form GSA
C. Memorandum of Agreement – Preparation of GSP
SLO Basin Groundwater Sustainability Plan List of Terms Used
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LIST OF TERMS USED
Abbreviation Definition
AB Assembly Bill
ADD Average Day Demand
AF Acre Feet
AFY Acre Feet per Year
Basin Plan Water Quality Control Plan for the Central Coast Basin
Cal Poly California Polytechnic State University
CASGEM California State Groundwater Elevation Monitoring program
CCR California Code of Regulations
CCRWQCB Central Coast Regional Water Quality Control Board
CCGC Central Coast Groundwater Coalition
CDFM Cumulative departure from the mean
CDPH California Department of Public Health
CIMIS California Irrigation Management Information System
City City of San Luis Obispo
County County of San Luis Obispo
CPUC California Public Utilities Commission
CPWS-52 Cal Poly Weather Station 52
CRWQCB California Regional Water Quality Control Board
CWC California Water Code
DDW Division of Drinking Water
Du/ac Dwelling Units per Acre
DWR Department of Water Resources
EPA Environmental Protection Agency
ERMWC Edna Ranch Mutual Water Company
ET0 Evapotranspiration
EVGMWC Edna Valley Growers Ranch Mutual Water Company
°F Degrees Fahrenheit
FAR Floor Area Ratio
FY Fiscal Year
GAMA Groundwater Ambient Monitoring and Assessment program
GHG Greenhouse Gas
GMP Groundwater Management Plan
GPM Gallons per Minute
GSA Groundwater Sustainability Agency
GSC Groundwater Sustainability Commission
GSP Groundwater Sustainability Plan
GSWC Golden State Water Company
IRWMP San Luis Obispo County Integrated Regional Water Management Plan
kWh Kilowatt-Hour
LUCE Land Use and Circulation Element
LUFTs Leaky Underground Fuel Tanks
MAF Million Acre Feet
MCL Maximum Contaminant Level
MG Million Gallons
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Abbreviation Definition
MGD Million Gallons per Day
Mg/L Milligrams per Liter
MOA Memorandum of Agreement
MOU Memorandum of Understanding
MWR Master Water Report
NCDC National Climate Data Center
NOAA National Oceanic and Atmospheric Administration
NWIS National Water Information System
RW Recycled Water
RWQCB Regional Water Quality Control Board
SB Senate Bill
SGMA Sustainable Groundwater Management Act
SGMP Sustainable Groundwater Management Planning
SGWP Sustainable Groundwater Planning
SLO Basin San Luis Obispo Valley Groundwater Basin
SLOFCWCD San Luis Obispo Flood Control and Water Conservation District
SCML Secondary Maximum Contaminant Level
SOI Sphere of Influence
SNMP Salt and Nutrient Management Plan
SWRCB California State Water Resources Control Board
TDS Total Dissolved Solids
TMDL Total Maximum Daily Load
USGS United States Geological Survey
USFW United States Fish and Wildlife Service
USTs Underground Storage Tanks
UWMP Urban Water Management Plan
UWMP Act Urban Water Management Planning Act
UWMP Guidebook Department of Water Resources 2015 Urban Water Management Plan Guidebook
VRMWC Varian Ranch Mutual Water Company
WCS Water Code Section
WMP Water Master Plan
WPA Water Planning Areas
WRF Water Reclamation Facility
WRCC Western Regional Climate Center
WRRF Water Resource Recovery Facility
WSA Water Supply Assessment
WTP Water Treatment Plant
WWTP Wastewater Treatment Plant
SLO Basin Groundwater Sustainability Plan Executive Summary
County of SLO and City of SLO
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EXECUTIVE SUMMARY
This section to be completed after GSP is complete.
SLO Basin Groundwater Sustainability Plan Introduction to the SLO Basin GSP
County of SLO and City of SLO
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1 INTRODUCTION TO THE SLO BASIN GSP
1.1 PURPOSE OF THE GROUNDWATER SUSTAINABILITY PLAN
The Sustainable Groundwater Management Act (SGMA), Section 10720, et. al., of the State Water Code,
requires sustainable groundwater management in all high and medium priority basins. The San Luis
Obispo Valley Groundwater Basin (SLO Basin) was designated as a high priority basin. To comply with
and satisfy the requirements of SGMA, the following activities are mandated:
• Forming one or more Groundwater Sustainability Agencies (GSAs) by June 30, 2017 to cover the
entire SLO Basin. In May 2017, both the City of San Luis Obispo (City) and the County of San Luis
Obispo (County) each formed GSAs within their jurisdictions, resulting in full coverage of the SLO
Basin.
• Developing a Groundwater Sustainability Plan (GSP) by the GSAs that covers the entire SLO
Basin by January 31, 2022.
• Implementing the GSP to achieve quantifiable objectives and sustainability within 20 years by
2042.
• Annual reporting of groundwater conditions in the basin to the California Department of Water
Resources (DWR).
• Periodic (every five years) evaluation of the GSP implementation by the GSAs.
This document fulfills the GSP development requirement for the SLO Basin. This GSP describes and
assesses the groundwater condition of the SLO Basin, develops quantifiable management objectives that
account for the interests of the SLO Basin’s beneficial groundwater uses and users, and identifies a
group of projects and management actions that will allow the SLO Basin to achieve and maintain
sustainability in the future.
1.2 DESCRIPTION OF SLO BASIN
This GSP covers the entire SLO Basin identified as Basin No. 3-009 in the DWR’s Bulletin 118 (DWR,
2016). The SLO Basin lies in the southern portion of San Luis Obispo County. The SLO Basin is comprised
of valleys of gentle flatlands and rolling hills ranging in elevation from approximately 100 to 500 feet
above mean sea level, surrounded by larger mountain ranges. A terrain map displaying the SLO Basin
boundaries is presented in Figure 1-1, which also displays the watershed areas of the San Luis Obispo
Creek and Pismo Creek drainages, faults, and nearby groundwater basins symbolized by the SGMA 2019
Basin Prioritization Phase 1. Average annual precipitation ranges from approximately 18 inches
throughout most of the SLO Basin to about 22 inches in relatively higher elevation areas near the City
and Cal Poly. The SLO Basin is within the watershed areas of the San Luis Obispo Creek and Pismo Creek
drainages, which are bounded on the northeast by the Santa Lucia Range and on the southwest by the
formations of the San Luis Range and the Edna Fault. The SLO Basin is commonly referenced as being
composed of two distinct valleys, with the San Luis Valley in the northwest and the Edna Valley in the
southeast. The San Luis Valley lies within the San Luis Obispo Creek drainage and the Edna Valley lies
within the Pismo Creek drainage.
There is a bedrock high that underlies between the San Luis Valley and Edna Valley. The watershed
divide and the bedrock high divide are not coincident. The sediments of the Edna Valley have
significantly greater thickness than those of the San Luis Valley. Precipitation that falls west of the
watershed divide ultimately flows to Davenport and San Luis Obispo Creeks, and precipitation that falls
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east of that divide flows to Corral de Piedras Creek or the other small tributaries, which ultimately flow
to Pismo Creek south of the SLO Basin.
San Luis Obispo and Pismo Creeks are the primary surface water features within the SLO Basin.
Significant tributaries to the San Luis Obispo Creek within Basin include Prefumo Creek, Stenner Creek,
and Davenport Creek. Significant tributaries to Pismo Creek include both East and West branches of the
Corral de Piedras Creek. Urban areas within the SLO Basin include the City of San Luis Obispo, Cal Poly,
Edna, and Verde. Highway 101 is the most significant north-south highway in the Basin.
1.3 BASIN PRIORITIZATION
The DWR prioritized California’s groundwater basins through the California Statewide Groundwater
Elevation Monitoring (CASGEM) program and released the results in 2014. With the passage of SGMA,
DWR redefined 54 groundwater basins based on requests for basin boundary modifications and
classified the basins into four categories; high, medium, low, or very low priority. The SLO Basin was
classified as a medium priority basin.
The DWR reassessed the priority of the groundwater basins following the 2016 basin boundary
modification, as required by the Water Code and documented the results in the SGMA 2019 Basin
Prioritization (DWR, 2019). DWR followed the process and methods developed for the CASGEM 2014
Basin Prioritization and incorporated new data, to the extent data was available, and the amended the
language of Water Code Section 10933(b)(8) (component 8) included an analysis of adverse impacts on
local habitat and local streamflow. DWR prioritized the basins based on the following components
specified in Water Code Section 10933(b):
1. The population overlying the basin or sub-basin.
2. The rate of current and projected growth of the population overlying the basin or sub-basin.
3. The number of public supply wells that draw from the basin or sub-basin.
4. The total number of wells that draw from the basin or sub-basin.
5. The irrigated acreage overlying the basin or sub-basin.
6. The degree to which persons overlying the basin or sub-basin rely on groundwater as their
primary source of water.
7. Any documented impacts on the groundwater within the basin or sub-basin, including overdraft,
subsidence, saline intrusion, and other water quality degradation.
8. Any other information determined to be relevant by the department, including adverse impacts
on local habitat and local streamflow.
With the addition of component 8, the SLO Basin moved from a medium priority basin to a high priority
basin not in critical overdraft and is required to submit a GSP to DWR by January 31, 2022. The change
in priority is inconsequential, as medium priority basins are also required to submit a GSP to DWR by
January 31, 2022.
Additional information about how each of these components were analyzed can be found in the
2019 SGMA Basin Prioritization Process and Results Document (DWR, 2019). DWR is required to provide
updates on basin boundaries, basin priority and critically overdrafted basins every 5 years beginning in
2020 as part of the Bulletin 118 updates.
SLO Basin Groundwater Sustainability Plan Introduction to the SLO Basin GSP
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Figure 1-1: San Luis Obispo Valley Basin and Surrounding Basins.
SLO Basin Groundwater Sustainability Plan Agency Information (§ 354.6)
County of SLO and City of SLO
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2 AGENCY INFORMATION (§ 354.6)
On May 16, 2017, the City formed the City of San Luis Obispo Groundwater Sustainability Agency (City
GSA) for the portion of the SLO Basin that lies within its city boundary. On May 23, 2017, the County
formed the San Luis Obispo Valley Basin – County of San Luis Obispo Groundwater Sustainability Agency
(County GSA) to cover all otherwise unrepresented areas within the SLO Basin. The County, City, the
Edna Valley Growers Mutual Water Company (EVGMWC), the Varian Ranch Mutual Water Company
(VRMWC), the Edna Ranch Mutual Water Company (ERMWC) and the Golden State Water Company
(GSWC) (each referred to individually as a " Party" and collectively as the "Parties") entered into a
Memorandum of Agreement Regarding Preparation of a GSP for the SLO Basin (MOA) effective as of
January 25, 2018. The MOA’s purpose is for the City and County, with input from the Participating
Parties, to coordinate preparation of a single GSP for the entire SLO Basin pursuant to SGMA and other
applicable provisions of law. Figure 2-1 shows the service area boundaries of each of the MOA Parties
and the GSA areas.
On October 16, 2018, the County GSA gave notice to DWR that it intends to develop a GSP in
collaboration with the City GSA for the SLO Basin in accordance with California Water Code (CWC)
Section 10727.8 and the Title 23, Section 353.6 of the California Code of Regulations (CCR).
2.1 AGENCIES NAMES AND MAILING ADDRESSES
The following contact information is provided for each groundwater sustainability agency for the SLO
Basin pursuant to California Water Code
§10723.8.
County of San Luis Obispo
County Government Center, Room 206
San Luis Obispo, CA 93408
Attention: John Diodati , Public Works Interim Director
City of San Luis Obispo
Utilities Department
879 Morro Street
San Luis Obispo, CA 93401-2710
Attention: Aaron Floyd, Utilities Director
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Figure 2-1: San Luis Obispo Valley Basin GSAs and Participating Parties.
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2.2 AGENCIES ORGANIZATION AND MANAGEMENT STRUCTURES
The MOA establishes the Groundwater Sustainability Commission (GSC) as an advisory body to the GSAs
and the terms under which the City GSA and County GSA will jointly develop a single GSP, in coordination
with the GSC. The GSC consists of representatives of the GSAs and the Participating Parties (i.e., EVGMWC,
VRMWC, ERMWC, and GSWC). Each member of the GSC shall be entitled to one vote on any matter under
consideration by the GSC. All recommendations submitted by the GSC to the City Council and the County
Board of Supervisors shall be supported by a majority of the members, except for the recommendation to
adopt the GSP or any amendments which shall be supported by at least four of the members.
City and County staff will collaboratively participate in developing a GSP through, among other things,
providing guidance to consultant, coordinating with the GSC, and engaging SLO Basin users and
stakeholders. Once the GSP is developed, it will be considered for adoption by the GSAs (i.e., City Council
and County Board of Supervisors) and subsequently submitted to DWR for approval. The MOA
automatically terminates upon approval of the GSP by DWR. The organization and management structures
of each of the Parties are described in the following sections. The MOA does not specify the appointment of
officer positions. However, Figure 2-2 shows the names of the appointed representative members and
alternates and depicts the relationship of the GSAs and the Participating Parties and the overall governance
structure for developing the GSP:
Figure 2-2: Groundwater Sustainability Commission (GSC)
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2.2.1 County of San Luis Obispo
The County is a GSA and Party of the MOA. Members of the County Board of Supervisors sit on the GSC as a
member and alternate member. The County is governed by a five-member Board of Supervisors
representing five districts in the County. Board of Supervisor members are elected to staggered four-year
terms.
2.2.2 City of San Luis Obispo
The City is a GSA and Party of the MOA. A member of the City Council and the Director of Utilities sit on the
GSC as a member and alternate member, respectively. The City is an incorporated charter city and operates
under the "Council-Mayor-City Manager" form of municipal government. The five-member City Council
consists of the directly-elected Mayor and four City Council Members. The Mayor is elected to a two-year
term and Council Members are elected to four-year terms.
2.2.3 Other Participating Parties in the MOA
2.2.3.1 Edna Valley Growers Mutual Water Company
EVGMWC is a Party of the MOA and its representative is designated as Chair of the GSC. EVGMWC
provides water to the residents of unincorporated San Luis Obispo County within the SLO Basin.
2.2.3.2 Varian Ranch Mutual Water Company
VRMWC is a Party of the MOA and a member of the GSC. VRMWC provides water to the residents of
unincorporated San Luis Obispo County and serves an area within the SLO Basin as shown in Figure 2-1.
2.2.3.3 Edna Ranch Mutual Water Company
ERMWC is a Party of the MOA and a member of the GSC. ERMWC provides water to the residents of
unincorporated San Luis Obispo County and serves an area within the SLO Basin as shown in Figure 2-1.
2.2.3.4 Golden State Water Company
GSWC is a Party of the MOA and its representative is designated as a Vice Chair of the GSC. GSWC is
an Investor Owned Utility regulated by the California Public Utilities Commission (CPUC) and subject to
federal Sarbanes-Oxley requirements that hold companies to the highest levels of transparency. CPUC’s
authority to regulate water, electric, natural gas, and other public utilities subject to its jurisdiction derives
from the California state constitution.
2.3 AUTHORITY OF AGENCIES
The GSAs developing this coordinated GSP were formed in accordance with the requirements of California
Water Code §10723 et seq. The resolutions of formation for the GSAs and the Memorandum of
Understanding (MOA) are included in Appendices A - C. The specific legal authorities for GSA formation and
GSP implementation are summarized below.
2.3.1 Groundwater Sustainability Agencies
“Local agency” is defined pursuant to CWC§ 10721 as a local public agency that has water supply, water
management, or land use responsibilities within a groundwater basin.
2.3.1.1 County of San Luis Obispo
The County was created as described in Government Code Section 460
which states that the state is divided into counties, the names, boundaries and territorial subdivisions of
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which are declared in Title 3 of the Government Code. The County has land use authority over the
unincorporated areas of the county, including areas overlying the SLO Basin. The County is therefore a local
agency under CWC§ 10721(n) with the authority to establish itself as a GSA. Upon establishing itself as a
GSA, the County retains all the rights and authorities provided to GSAs under CWC§ 10725 et seq. The City
and the County shall each be responsible for adopting the GSP and implementing the GSP within their
respective service areas.
2.3.1.2 City of San Luis Obispo
The City is incorporated under the laws of the State of California. The City provides water supply and land
use planning services to its residents. The City is therefore a local agency under CWC§ 10721(n) with the
authority to establish itself as a GSA. Upon establishing itself as a party of the GSA, San Luis Obispo retains
all the rights and authorities provided to GSAs under CWC§ 10725 et seq. The City and the County shall
each be responsible for adopting the GSP and implementing the GSP within their respective service areas.
2.3.2 Memorandum of Agreement
The MOA Parties entered into the MOA effective as of January 25, 2018. The MOA establishes the GSC as
an advisory body to the GSAs and the terms under which the City GSA and County GSA will jointly develop a
single GSP, in coordination with the GSC pursuant to SGMA and other applicable provisions of law. The GSC
members consists of representatives of the GSAs and the Participating Parties (i.e., EVGMWC, VRMWC,
ERMWC, and GSWC). City and County staff will collaboratively participate in developing a GSP through,
among other things, providing guidance to the consultant, coordinating with the GSC, and engaging SLO
Basin users and stakeholders. Each GSC member has one vote on the GSC. The County Board of Supervisors
and the City Council may approve or reject any advisory opinion submitted by the GSC provided that in
every case that the County Board of Supervisors or City Council rejects an advisory opinion of the GSC
related to the contents or adoption of the GSP it shall do so only after holding a public hearing, at which
time the members of the GSC shall have the right to appear and address the City Council and the County
Board of Supervisors. The MOA automatically terminates upon approval of the GSP by DWR. A copy of the
MOA is included in Appendix B.
2.3.3 Coordination Agreements
Only a single GSP is developed by the City and County GSAs to cover the entire SLO Basin. Therefore, no
coordination agreements with other GSAs are necessary because there is no multiple GSPs.
2.4 CONTACT INFORMATION FOR PLAN MANAGER
The plan manager is to be determined.
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County of SLO and City of SLO
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3 REFERENCES
Carollo. 2012. San Luis Obispo County Master Water Report. 2012.
City of San Luis Obispo. 2016. 2015 Urban Water Management Plan. 2016.
County of San Luis Obispo. 2014. San Luis Obispo County Integrated Regional Water Management Plan
(IRWMP). 2014.
Cuesta Engineering Corporation. 2007. San Luis Obispo Creek Watershed Calibration Study. 2007.
DWR. 2016. California's Groundwater: Bulletin 118 - Interim Update 2016, Working Towards
Sustainability. 2016.
—. 2003. California's Groundwater: Bulletin 118 - Update 2003, Groundwater Basin Descriptions. 2003.
—. 2019. Sustainable Groundwater Management Act 2019 Basin Prioritization - Process and Results
Document. 2019.
GSI Water Solutions. 2018. San Luis Obispo Valley Basin Characterization and Monitoring Well
Installation. 2018.
WSC. 2018. Salinas and Whale Rock Reserviors Safe Annual Yield TM. 2018.
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4 APPENDICES
APPENDIX A - CITY OF SAN LUIS OBISPO RESOLUTION TO FORM GSA
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APPENDIX B - COUNTY OF SAN LUIS OBISPO RESOLUTION TO FORM GSA
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APPENDIX C - MEMORANDUM OF AGREEMENT – PREPARATION OF GSP
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