City Council and Concurrent Authorities
April 2, 2024

Federal
No federal plans, policies, regulations, or laws related to transportation and circulation are applicable to the project.

State
Senate Bill 375
Senate Bill (SB) 375 provides guidance regarding curbing emissions from cars and light trucks.

There are four major components to SB 375. First, SB 375 requires regional greenhouse gas emission targets. These targets must be updated every 8 years in conjunction with the revision schedule of the housing and transportation elements of local general plans. Second, Metropolitan Planning Organizations are required to create a Sustainable Communities Strategy (SCS) that provides a plan for meeting regional targets. Third, SB 375 requires housing elements and transportation plans to be synchronized on 8-year schedules. Finally, Metropolitan Planning Organizations must use transportation and air emissions modeling techniques that are consistent with the guidelines prepared by the California Transportation Commission.

Senate Bill 743
Passed in 2013, California Senate Bill (SB) 743 changes the focus of transportation impact analysis in CEQA from measuring impacts to drivers, to measuring the impact of driving. The change is being made by replacing Level of Service (LOS) as a performance metric with a vehicle miles traveled (VMT) approach. This shift in transportation impact focus is intended to better align transportation impact analysis and mitigation outcomes with the State’s goals to reduce greenhouse gas (GHG) emissions, encourage infill development, and improve public health through development of multimodal transportation networks. LOS or other delay metrics may still be used to evaluate the effect of projects on drivers as part of land use entitlement review and impact fee programs.

In December 2018, the Natural Resources Agency finalized updates to Section 15064.3 of the CEQA Guidelines, including the incorporation of SB 743 modifications. The Guidelines’ changes were approved by the Office of Administrative Law and as of July 1, 2020 are now in effect statewide.

To help aid lead agencies with SB 743 implementation, the Governor’s Office of Planning and Research (OPR) produced the Technical Advisory on Evaluating Transportation Impacts in CEQA that provides guidance about the variety of implementation questions they face with respect to shifting to a VMT metric. Key guidance from this document includes:
• VMT is the most appropriate metric to evaluate a project’s transportation impact. • OPR recommends tour- and trip-based travel models to estimate VMT, but ultimately defers to local agencies to determine the appropriate tools.

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• OPR recommends measuring VMT for residential and office projects on a “per rate” basis.
• OPR recommends that a per capita or per employee VMT that is fifteen percent below that of existing development may be a reasonable threshold. In other words, an office project that generates VMT per employee that is more than 85 percent of the regional VMT per employee could result in a significant impact. OPR notes that this threshold is supported by evidence that connects this level of reduction to the State’s emissions goals. • OPR recommends that where a project replaces existing VMT-generating land uses, if the replacement leads to a net overall decrease in VMT, the project would lead to a less-than- significant transportation impact. If the project leads to a net overall increase in VMT, then the thresholds described above should apply.
• Lead agencies have the discretion to set or apply their own significance thresholds.

Caltrans
Caltrans issued the VMT-Focused Transportation Impact Study Guide (TISG) in May 2020, providing the process by which Caltrans will review and assess VMT impacts of land development projects. The TISG generally aligns with the guidance in the OPR Technical Advisory.

Caltrans also issued the Transportation Analysis Framework (TAF) in September 2020, which details methodology for calculating induced travel demand for capacity increasing transportation projects on the State Highway System. Caltrans also issued the Transportation Analysis Under CEQA (TAC) guidance in September 2020 which describes significance determinations for capacity increasing projects on the State Highway System. It is noted that the Housing Element Update does not propose any changes to the Caltrans owned and operated network.

Caltrans also issued Traffic Safety Bulletin 20-02-R1: Interim Local Development Intergovernmental Review Safety Review Practitioner Guidance in December 2020, describing the methods with which Caltrans will assess the safety impacts of projects on the Caltrans owned and operated network. This guidance states that Caltrans will provide its safety assessment to lead agencies for inclusion in environmental documents.

Finally, Caltrans has adopted procedures to oversee construction activities on and around its facilities. The Caltrans Construction Manual (Caltrans, 2020b) describes best practices for construction activities, including personnel and equipment safety requirements, temporary traffic control, signage, and other requirements aimed at reducing construction-related hazards and constructing projects safely and efficiently. Any work proposed on Caltrans facilities would be required to abide by these requirements.

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Local
City of Stockton General Plan 2040
Stockton General Plan 2040, adopted in 2018, contains policies and actions related to analysis and mitigation of VMT impacts of new development. These are listed below.

Policy TR-4.2: Replace LOS with: (1) vehicle-miles traveled (VMT) per capita; and (2) impacts to non-automobile travel modes, as the metrics to analyze impacts related to land use proposals under the California Environmental Quality Act, in accordance with SB 743.

Action TR-4.2A: To evaluate the effects of new development and determine mitigation measures and impact fees, require projects to evaluate per capita VMT and impacts to transit, bicycle, and pedestrian modes.

Action TR-4.2B: Amend the City’s Transportation Impact Analysis Guidelines to include alternative travel metrics and screening criteria.

Policy TR-4.3: Use the threshold recommended by the California Office of Planning and Research for determining whether VMT impacts associated with land uses are considered significant under State environmental analysis requirements.

Action TR-4.3A: Amend the City’s Transportation Impact Analysis Guidelines to:
• Establish a threshold of 15 percent below baseline VMT per capita to determine a significant transportation impact under the California Environmental Quality Act. • Identify screening criteria that will streamline certain types of development and/or development in certain areas by not requiring a VMT analysis.

City of Stockton Transportation Impact Analysis Guidelines (Interim) The City of Stockton Transportation Impact Analysis Guidelines (Interim) were completed in December 2021 and are effective for the calendar year January 1, 2021 through December 31, 2022. The guidelines were prepared as an update to the prior guidelines, in part to address the requirements of SB 743 and to implement the General Plan 2040 policies and actions listed above.

The guidelines lay out requirements for both CEQA and non-CEQA analysis. For the VMT portion of the CEQA analysis, the guidelines include sections related to initial screening, the types of VMT to be calculated, descriptions of the baseline and cumulative scenarios, and the VMT impact significance criteria. Table 1 shows the VMT impact criteria contained in the guidelines.

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Table 1: VMT Impact Criteria for Land Use Projects under Baseline Conditions Project Type Significance Criteria Baseline Level1 Impact Threshold Residential
A project exceeds existing
citywide home-based VMT
per resident minus 15%

17.46 Home-based VMT per
resident (citywide average)
15% below baseline
(14.84 Home-based VMT per
resident)
Office
A project exceeds citywide
home-based work VMT per
employee minus 15%

18.56 Home-based work VMT per
Employee (citywide average)
15% below baseline
(15.78 Home-based work
VMT per Employee)
Retail A net increase in total VMT
Can be measured for a
project’s influence area or
citywide
Can be measured for a
project’s influence area or
citywide
Mixed-Use For screening, evaluate each component of a mixed-use development independently, taking credit for internal capture, and apply the significance criteria for each project type.

Other Land
Use Types
The City’s TIA Guidelines explicitly addresses residential, office, and retail projects because those are very common land use types. In general, work-related land uses may be treated like the office land use subject to city approval. Likewise, land uses that generate a high proportion of their vehicle trips from visitors or customers may be treated like the retail land use subject to city approval. Applicants must coordinate with the City to affirm the appropriate, project-based VMT thresholds for other land uses.

1. Values subject to change based on changes to the baseline year or the City’s travel demand model.

Source: City of Stockton Transportation Impact Analysis Guidelines (Interim), December 2021.

The guidelines also discuss the need for analysis of a project’s effect on total VMT within a region under cumulative conditions:

Some projects may also be required to evaluate the project effect on VMT under Year 2040 Cumulative Conditions. Cumulative without Project VMT estimates should be based on the horizon year of the Stockton model, ensuring the model does not already contain the land uses or transportation improvements associated with the Project. Any transportation network modifications for the cumulative year must be limited to those that are fully funded and will be open to traffic by 2040. The environmental analysis also must evaluate a project’s effect on VMT (CEQA Guidelines Section 21100(b)(5)). The project-generated VMT analysis considers all trips as new trips and does not consider how Cumulative Conditions considers the project’s influence on the VMT generation of surrounding land uses. The cumulative project effect on VMT shall be estimated using the City limit boundary and extracting the total link-level VMT for both the no project and with project conditions.

III. VMT Impact Assessment
Significance Thresholds
As directed by the City of Stockton, this impact assessment compares the impacts of the 2021 Project to those of the 2004 Project. Both projects include a mix of uses, including residential, EXHIBIT 1
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office/industrial/employment uses, and retail uses. Therefore, the following thresholds from the Stockton Transportation Impact Analysis Guidelines (Interim) are used in this assessment:

The project would have a significant impact if:
a. The Project’s residential uses exceed baseline citywide home-based VMT per resident minus 15% and the Project’s residential uses have a home-based VMT per resident that is higher than the 2004 Cannery Park Project; or
b. The Project’s office/employment uses exceed baseline citywide home-based work VMT per employee minus 15% and the Project’s office/employment uses have a home-based work VMT per employee that is higher than the 2004 Cannery Park Project; or c. The Project would increase total citywide VMT relative to the VMT generated by the 2004 Project
Project Land Uses
While the 2021 Project proposes changes only to Planning Areas D and E within the 2004 Cannery Park Project site, because VMT is affected by the totality of land uses within a project site and a region, this analysis provides a comparison of the complete 2004 Project and the complete 2021 Project (i.e., including the uses in Planning Areas A, B and C which are not changed with the Project). This approach captures the full effect of the change in uses with the 2021 Project.

However, Fehr & Peers also analyzed the VMT impacts when considering just the change in uses in Planning Areas D and E, to provide additional information on the VMT effects of the 2021 Project.

Table 2 shows the land uses in Planning Areas A, B and C, including the residential uses that have already been developed (for the No Project case). As noted above, the remaining development in these planning areas is the same under the 2004 Project and the 2021 Project.

Table 2: Land Use Summary: Plan Area A/B/C
Land Use
KSF or Dwelling Units Employees
No Project 2004 Project 2021 Project No Project 2004 Project 2021 Project Single Family
Housing 743 1,077 1,077 - - -
Industrial - 1452.508 KSF 1452.508 KSF - 1,060 1,060

1. Employees estimated Stockton Travel Demand Model employee/KSF conversion rates.

Source: DeNovo Planning, October 2021; Fehr & Peers, March 2022.

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Table 3 shows the land uses in Planning Areas D and E under the 2004 Project and the 2021 Project.

Table 3: Land Use Summary: Plan Area D/E
Land Use
KSF or Dwelling Units Employees1
No Project 2004 Project 2021 Project No Project 2004 Project 2021 Project Area D - North of Bear Creek
Multi Family
Housing - - 296 - - 296
Restaurant - - 29.8 KSF - - 29
Medical Office - - 9.8 KSF - - 22
Office - 134.295 KSF 15.6 KSF - 305 35
Retail - -

24.6 KSF and
111 Hotel
Rooms
- - 123
Area E - South of Bear Creek
Single Family
Housing - - 321 - - 321
Multi Family
Housing - 210 - - 210 -
Retail - 944.468 KSF - - 851 -

1. Employees estimated using Stockton Travel Demand Model employee/KSF conversion rates.

Source: DeNovo Planning, October 2021; Fehr & Peers, March 2022.

VMT Analysis and Results
The Baseline Stockton Travel Demand Model was adjusted to reflect the No Project, With 2004 Project, and With 2021 Project land uses to allow an assessment of VMT impacts relative to significance criteria (a) and (b). In addition, the 2040 model was adjusted to reflect the 2004 Project and the 2021 Project to allow an assessment under significance criterion (c).

Table 4 presents the Baseline With Project VMT results comparing the 2021 Project as a whole (i.e. the full Cannery Park site) to the 2004 Project and the citywide average. While neither the 2004 Project nor the 2021 Project produces VMT per capita that is 15 percent below the citywide average, the home-based VMT per resident is lower with the 2021 Project than with the 2004 Project (21.59 versus 21.63). However, the home-based work VMT per worker is slightly higher with the 2021 Project than with the 2004 Project (21.86 versus 21.77).

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Table 4: VMT Summary: Baseline with Project (Full Cannery Park Project) VMT Area
Home-Based VMT per Resident Home-Based Work VMT per Worker 2004 Project 2021 Project 2004 Project 2021 Project
Citywide Average 17.49 17.49 18.62 18.62
85 percent of City Average 14.87 14.87 15.83 15.83
Project Only 21.63 21.59 21.77 21.86
Project < 85 percent of
City Average? No No No No
2021 Project < 2004
Project? - Yes - No
Source: Fehr & Peers, March 2022.

Table 5 presents the Baseline With Project VMT results comparing just the changed areas (Planning Areas D and E) between the 2021 Project and the 2004 Project, alongside the citywide average. Focusing just on the changed areas, neither the 2004 Project nor the 2021 Project produces VMT per capita that is 15 percent below the citywide average. However, both the home- based VMT per resident and the home-based work VMT per worker are lower with the 2021 Project than with the 2004 Project (21.91 versus 23.56 for the residential VMT, and 20.91 versus

21.84 for the worker VMT).

Table 5: VMT Summary: Baseline with Project (Planning Areas D and E Only) VMT Area
Home-Based VMT per Resident Home-Based Work VMT per Worker 2004 Project 2021 Project 2004 Project 2021 Project
Citywide Average 17.49 17.49 18.62 18.62
85 percent of City Average 14.87 14.87 15.83 15.83
Project Only (Planning
Areas D and E) 23.56 21.91 21.84 20.91
Project < 85 percent of
City Average? No No No No
2021 Project < 2004
Project? - Yes - Yes
Source: Fehr & Peers, March 2022.

Table 6 shows the total citywide VMT under Baseline With Project and Cumulative (2040) With Project conditions, for the 2021 Project and the 2004 Project. The 2021 Project results in lower VMT than the 2004 Project in both scenarios.

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Table 6: VMT Summary: Citywide Total VMT
Scenario With 2004 Project With 2021 Project 2021 Project < 2004 Project?
Baseline 5,009,069 4,977,057 Yes
Cumulative (2040) 6,277,222 6,253,041 Yes
Source: Fehr & Peers, March 2022.

Based on the above findings, and City direction to conduct this assessment as a comparison of the 2021 Project impacts to the 2004 Project’s impacts, the VMT impact can be considered less than significant. The only metric by which the 2021 Project results in higher VMT than the 2004 Project is the Baseline With Project home-based work VMT per worker. Since this metric is lower with the 2021 Project than the 2004 Project under Cumulative conditions, and the metric is lower with the 2021 Project than the 2004 Project when considering just the two Change Areas, and the 2021 Project results in lower citywide VMT than the 2004 Project under both Baseline and Cumulative conditions, the impact with respect to VMT can be considered less than significa nt.

Please call Ellen Poling at (925) 930-7100 if you have any questions about this memorandum.

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EIR ADDENDUM – CANNERY PARK EIR
City of Stockton October 2023
142
Appendix D: Water Supply Assessment
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Cannery Park Project
Water Supply Assessment

PREPARED FOR
City of Stockton
FINAL REPORT | DECEMBER 2022
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Cannery Park Project
Water Supply Assessment

Prepared for
City of Stockton

Project No. 129-60-22-53

December 29, 2022
Project Manager: Elizabeth T. Drayer, PE Date

December 29, 2022
QA/QC Review: Rhodora Biagtan, PE Date

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Executive Summary ................................ ................................ ................................ ............................ 1 Purpose of Water Supply Assessment .................................................................................................... 1 Proposed Project Overview .................................................................................................................... 1 Potable and Recycled Water Demands and Supply Availability ............................................................. 1 Determination of Water Supply Sufficiency ........................................................................................... 2

1.0 Introduction ................................ ................................ ................................ ................................ . 3

1.1 Legal Requirement for Water Supply Assessment ........................................................................... 3

1.2 Need for and Purpose of Water Supply Assessment ....................................................................... 3

1.3 Water Supply Assessment Preparation, Format and Organization .................................................. 4

2.0 Description of Proposed Project ................................ ................................ ................................ .... 5

2.1 Proposed Project Location ............................................................................................................... 5

2.2 Proposed Land Uses and Projected Water Demand ........................................................................ 5

2.3 Projected Water Supply .................................................................................................................... 5

3.0 Required Determinations ................................ ................................ ................................ ............. 8

3.1 Does SB 610 apply to the Proposed Project? ................................................................................... 8

3.2 Does SB 221 apply to the Proposed Project? ................................................................................... 8

3.3 Who is the Identified Public Water System? .................................................................................... 9

3.4 Does the City have an adopted Urban Water Management Plan (UWMP) and does the UWMP include the projected water demand for the Proposed Project? .................................. 9

4.0 City of Stockton Municipal Utilities Department Water Service Area ................................ ............ 10

4.1 Water Service Area ......................................................................................................................... 10

4.2 Population ...................................................................................................................................... 11

4.3 Climate ............................................................................................................................................ 12

5.0 City of Stockton Municipal Utilities Department Water Demands ................................ ................ 13

5.1 Historical and Existing Water Demand ........................................................................................... 13

5.2 Future Water Demand .................................................................................................................... 13

5.3 Dry Year Water Demand................................................................................................................. 14

6.0 City of Stockton Municipal Utilities Department Water Supplies ................................ .................. 15

6.1 Existing Potable Water Supplies ..................................................................................................... 16

6.1.1 Purchased Water .................................................................................................................. 16

6.1.1.1 Stockton East Water District ....................................................................................... 17

6.1.1.2 Woodbridge Irrigation District .................................................................................... 17

6.1.2 Surface Water ....................................................................................................................... 17

6.1.2.1 Water Right Permit ...................................................................................................... 17

6.1.2.2 Delta Water Treatment Plant ...................................................................................... 18 EXHIBIT 1

6.1.3 Groundwater ......................................................................................................................... 19

6.1.3.1 Groundwater Overview ............................................................................................... 19

6.1.3.2 Groundwater Basin Management ............................................................................... 20

6.1.3.3 Groundwater Use ........................................................................................................ 20

6.1.3.4 Groundwater as a Future Water Supply...................................................................... 21

6.2 Additional Planned Future Potable Water Supplies ....................................................................... 21

6.3 Summary of Existing and Additional Planned Future Water Supplies .............................................. 22

6.4 Water Supply Availability and Reliability ........................................................................................ 22

6.4.1 Reliability by Water Source ................................................................................................... 23

6.4.1.1 SEWD Supply ............................................................................................................... 23

6.4.1.2 San Joaquin River Supply ............................................................................................. 23

6.4.1.3 WID Supply .................................................................................................................. 24

6.4.1.4 Groundwater Supply ................................................................................................... 24

6.4.2 Summary of Available Water Supplies Under Normal, Single Dry, and Multiple Dry Years ................................................................................................................ 25

7.0 Determination of Water Supply Sufficiency Based on Requirements of SB 610 ............................. 27

8.0 Verification of Sufficient Water Supply Based on the Requirements of SB 221 .............................. 29

8.1 Historical Water Deliveries ............................................................................................................. 29

8.2 Projected Water Demand by Customer Sector .............................................................................. 29

8.3 Water Shortage Contingency Analysis ........................................................................................... 30

8.4 Future Water Supplies to Serve Water Demands Associated with Buildout of the Proposed Project .................................................................................................................................................. 31

8.5 Verification of Sufficient Water Supply .......................................................................................... 31

9.0 Water Supply Assessment Approval Process ................................ ................................ ............... 32

10.0 References ................................ ................................ ................................ ............................... 33

LIST OF TABLES
Table 2-1. Total Projected Water Demand ............................................................................................. 5 Table 4-1. Historical and Projected Population for the COSMUD Water Service Area ........................ 11 Table 3-1. Monthly Average Climate Data Summary ........................................................................... 12 Table 5-1. Historical Potable Water Demand (includes Non-Revenue Water) .................................... 13 Table 5-2. Summary of Future Water Demand (includes Non-Revenue Water) ................................. 13 Table 6-1. Existing (2020) Water Supplies ............................................................................................ 16 Table 6-2. Historical Groundwater Volume Pumped by the COSMUD ................................................ 21 Table 6-3. Projected Water Supplies .................................................................................................... 22 Table 6-4. Anticipated San Joaquin River Water Supplies .................................................................... 24 EXHIBIT 1
Table 6-5. Normal Year Water Supply .................................................................................................. 25 Table 6-6. Single Dry Year Water Supply .............................................................................................. 25 Table 6-7. Multiple Dry Years Water Supply ........................................................................................ 26 Table 7-1. Summary of Water Demand Versus Water Supply During Various Hydrologic Conditions 28 Table 8-1. Actual and Projected Water Demands by Customer Sector ............................................... 30

LIST OF FIGURES
Figure 2-1. Project Location.................................................................................................................... 6 Figure 2-2. Project Site ........................................................................................................................... 7

LIST OF ACRONYMS AND ABBREVIATIONS
AF Acre-Feet 13
AFY Acre-Feet Per Year 1/5
Cal Water California Water Service 4
City City of Stockton 1
COSMUD City of Stockton Municipal Utilities Department 1/4 County San Joaquin County 1
Delta Sacramento-San Joaquin Delta 1/4
DJWWTP Dr. Joe Waidhofer Water Treatment Plant 16
DU Dwelling Unit
DWR California Department of Water Resources 18
DWTP Delta Water Treatment Plant 2/9
EIR Environmental Impact Report 16
ETo Evapotranspiration 9
F Fahrenheit 12
Gpd Gallons Per Day
GPU General Plan Update
GSP Groundwater Sustainability Plan 20
GWA Eastern San Joaquin Groundwater Authority
Mgd Million Gallons Per Day 21
Proposed Project Proposed Cannery Park Project
SB Senate Bill 4
SEWD Stockton East Water District 3
Sf Square Feet 16
SGMA Sustainable Groundwater Management Act 1/4
SOI Sphere of Influence 11
SOI/MSR City of Stockton Sphere of Influence Plan/Municipal Service Review State Water Board State Water Resources Control Board
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USBR United States Bureau of Reclamation 4
UWMP Urban Water Management Plan 18
Water Code California Water Code 2/10
WID Woodbridge Irrigation District 1
WSA Water Supply Assessment 16
WSCP Water Shortage Contingency Plan
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Cannery Park Project
Water Supply Assessment

EXECUTIVE SUMMARY
Purpose of Water Supply Assessment
The purpose of this Water Supply Assessment (WSA) is to perform the evaluation required by California Water Code Sections 10910 through 10915, as established by Senate Bill (SB) 610, and verification of sufficient water supply, as established by SB 221, in connection with the proposed Cannery Park Project (Proposed Project) located in the northeast portion of the City of Stockton (City). The Proposed Project is anticipated to receive potable water supply from the City of Stockton Municipal Utilities Department (COSMUD).

This WSA evaluates the adequacy and sufficiency of the COSMUD total projected water supplies, including existing water supplies and future planned water supplies, to meet the existing and projected future water demands, including those future water demands associated with the Proposed Project, under all hydrologic conditions (Normal Years, Single Dry Years, and Multiple Dry Years).

Proposed Project Overview
The Proposed Project is bounded by Eight Mile Road immediately to the north and is just west of Highway 99. The Proposed Project site contains approximately 100 gross acres1 and is proposed to be developed primarily as a mix of 321 single family residential units and 296 high-density residential units, with approximately 20 acres of commercial uses. T he Proposed Project would be in COSMUD’s North Stockton service area and would be served by COSMUD’s North Stockton water system.

The Proposed Project meets the definition of a “Project” per California Water Code Sections 10910 through 10915, as established by SB 610 in 2001, thus requiring the preparation of this WSA.

Potable and Recycled Water Demands and Supply Availability Projected potable demands for buildout of the Proposed Project total approximately 192 acre-feet per year (AFY). No recycled water demand is expected for the Proposed Project.

It is anticipated that potable water demands for the Proposed Project , if approved by the City, would be served by the COSMUD. The inclusion of existing and planned future water supplies is specifically allowed by the California Water Code:

California Water Code Section 10631(b): Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five -year increments described in subdivision (a).

Pursuant to California Water Code Section 10910(4) and based on the technical analyses described in this WSA, this WSA demonstrates that the COSMUD existing and additional planned future water supplies are sufficient to meet the COSMUD existing water demands, including those future water demands associated with the Proposed Project.
1 Project area based on San Joaquin County parcel data.

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Determination of Water Supply Sufficiency
As described in Section 7, this WSA demonstrates water supply sufficiency per the requirements of SB 610.

Water demand within the COSMUD water service area is not expected to exceed the COSMUD water supplies at buildout under any hydrologic condition through 2045. To remain conservative in planning, the City’s 2020 Urban Water Management Plan (UWMP) assumes no reduction in water demand during dry years. However, water conservation and demand reduction methods detailed in the adopted Water Shortage Contingency Plan, included in Appendix I of the City’s 2020 UWMP, are able to reduce demands by up to and greater than 50 percent under water supply shortage conditions and other emergencies.

Section 8 of this WSA also provides written ve rification of supply sufficiency per the requirements of SB 221 by demonstrating that water supplies available during Normal, Single Dry and Multiple Dry years within a 2 0-year projection will meet the projected demand associated with the Proposed Project, in addition to existing and planned future uses, including, but not limited to, agriculture and industrial uses.

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1.0 INTRODUCTION

1.1 Legal Requirement for Water Supply Assessment
California Senate Bill (SB) 610 amended state law, effective January 1, 2002, to improve the link between information on water supply availability and certain land use decisions made by cities and counties. SB 610 sought to promote more collaborative planning between local water suppliers and cities and counties. It requires detailed information regarding water supply availability to be provided to the city and county decision-makers prior to approval of specified large development projects. The purpose of this coordination is to ensure that prudent water supply planning has been conducted, and that planned water supplies are adequate to meet existing demands, anticipated demands from approved projects and tentative maps, and the demands of proposed projects.

SB 610 amended California Water Code (Water Code) Sections 10910 through 10915 (inclusive) to require land use lead agencies to:
• Identify any public water purveyor that may supply water for a proposed development project
• Request a Water Supply Assessment (WSA) from the identified water purveyor The purpose of the WSA is to demonstrate the sufficiency of the purveyor’s water supplies to satisfy the water demands of the proposed project, while still meeting the water purveyor’s existing an d planned future uses. Water Code Sections 10910 through 10915 delineate the specific information that must be included in the WSA.

1.2 Need for and Purpose of Water Supply Assessment
The purpose of this WSA is to perform the evaluation required by Water Code Sections 10910 through 10915 in connection with the Cannery Park Project ( Proposed Project). It is not to reserve water, or to function as a “will serve” letter or any other form of commitment to supply water (see Water Code Section 10914). The provision o f water service will continue to be undertaken in a manner consistent with applicable policies and procedures, consistent with existing law.

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1.3 Water Supply Assessment Preparation, Format and Organization The format of this WSA is intended to follow Water C ode Sections 10910 through 10915 to clearly delineate compliance with the specific requirements for a WSA. The WSA includes the following sections:
• Section 1: Introduction
• Section 2: Description of Proposed Project
• Section 3: Required Determinations
• Section 4: City of Stockton Municipal Utilities Department Water Service Area • Section 5: City of Stockton Municipal Utilities Department Water Demands • Section 6: City of Stockton Municipal Utilities Department Water Supplies • Section 7: Determination of Water Supply Sufficiency Based on the Requirements of SB 610 • Section 8: Verification of Sufficient Water Supply Based on the Requirements of SB 221 • Section 9: Water Supply Assessment Approval Process
• Section 10: References
Relevant citations of Water Code Sections 10910 through 10915 are included throughout this WSA in italics to demonstrate compliance with the specific requirements of SB 610.

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2.0 DESCRIPTION OF PROPOSED PROJECT
The Proposed Project location, description, and projected water demands are discussed below.

2.1 Proposed Project Location
The Proposed Project is located in the northeast area of the City, within existing City limits as shown on Figure 2-1, labelled as Cannery Park Large Lots 4, 5 & 6. A close-up view of the sites to be developed are shown on Figure 2-2. The Proposed Project would be served by the COSMUD.

The Envision Stockton 2040 General Plan land use designations for the Proposed Project are “Low Density Residential,” “High Density Residential,” and “Commercial.”2 The Proposed Project is located just south of Eight Mile Road and just west of Highway 99 and is currently surrounded by agricultural land uses to the north, and residential and rural residential land to the south, west, and east.

2.2 Proposed Land Uses and Projected Water Demand
The Proposed Project site contains approximately 100 gross acres of land3 and 617 total residential units.

In addition to the residential units, the Proposed Project would include approximately 19.8 acres of commercial development. Updated water use factors based on recent water consumption trends within the COSMUD service area , as presented in the City’s 2021 Water Master Plan Update, were used to determine the projected water demand for the Proposed Project. The total projected water demand is 192 acre-feet/year (AFY) as shown in Table 2-1. All of the water demands from the Proposed Project are anticipated to be served by the COSMUD North Stockton water system.

Table 2-1. Total Projected Water Demand
Land Use Type
Dwelling
Units, DU
Gross Area,
acres
Water Use
Factor(a)
Non-Revenue
Water(a), percent
Projected Water
Demand, AFY
Single Family Residential 321 - 242 gpd/DU

0.27 AFY/DU 8 95
High Density Residential 296 - 175 gpd/DU

0.20 AFY/DU 8 63
Commercial - 19.76 1.62 AFY/acre 8 35
Totals 617 192
(a) Based on the City of Stockton 2021 Water Master Plan Update.

2.3 Projected Water Supply
Water demands for the Proposed Project will be served using the COSMUD existing and future portfolio of water supplies discussed in Section 6. The inclusion of existing and planned future water supplies is specifically allowed by the Water Code:

Water Code Section 10631(b): Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five -year increments described in subdivision (a).
2 City of Stockton. December 2018. Envision Stockton 2040 General Plan. 3 Project area based on San Joaquin County parcel data, July 2022.

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Figure 2-1. Project Location
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Figure 2-2. Project Site
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3.0 REQUIRED DETERMINATIONS

3.1 Does SB 610 apply to the Proposed Project?
Water Code Section 10910 (a) Any city or county that determines that a project, as defined in Section 10912, is subject to the California Environmental Quality Act (Division 13 (commencing with Section 21000) of the Public Resources Code) under Section 21080 of the Public Resources Code shall comply with this part.

Water Code Section 10912 (a) “Project” means any of the following:
(1) A proposed residential development of more than 500 dwelling units. (2) A proposed shopping center or business establishment employing more than 1,000 persons or having more than 500,000 square feet of floor space.
(3) A proposed commercial office building employing more than 1,000 persons or having more than 250,000 square feet of floor space.
(4) A proposed hotel or motel, or both, having more than 500 rooms. (5) A proposed industrial, manufacturing, or processing plant, or industrial park planned to house more than 1,000 persons, occupying more than 40 acres of land, or having more than 650,000 square feet of floor area.
(6) A mixed-use project that includes one or more of the projects specified in this subdivision. (7) A project that would demand an amount of water equivalent to, or greater than, the amount of water required by a 500-dwelling unit project.

Based on the following facts, SB 610 does apply to the Proposed Project. • The City has determined that the Proposed Project is subject to the California Environmental Quality Act and that an Environmental Impact Report (EIR) is required • The Proposed Project, with 617 dwelling units, meets the definition of a “project” as specified in Water Code Section 10912(a) paragraph (1) as defined for a residential development
The Proposed Project has not been the subject of a previously adopted WSA and has not been included in an adopted WSA for a larger project. Therefore, according to Water Code Section 10910(a), a WSA is required for the Proposed Project.

3.2 Does SB 221 apply to the Proposed Project?
In 2001, SB 221 amended State law to require that approval by a city or county of certain residential subdivisions requires an affirmative written verification of sufficient water supply. Per California Government Code Section 66473.7(a)(1), a subdivision means a proposed residential development of more than 500 dwelling units. The Proposed Project, with its proposed 617 residential DUs, is therefore subject to the requirements of SB 221. Section 8 of this WSA provides the required written verification of sufficient water supply.

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3.3 Who is the Identified Public Water System?
Water Code Section 10910(b) The city or county, at the time that it determines whether an environmental impact report, a negative declaration, or a mitigated negative declaration is required for any project subject to the California Environmental Quality Act pursuant to Section 21080.1 of the Public Resources Code, shall identify any water system that is, or may become as a result of supplying water to the project identified pursuant to this subdivision, a public water system, as defined by Section 10912, that may supply water for the project.

Water Code Section 10912 (c) “Public water system” means a system for the provision of piped water to the public for human consumption that has 3,000 or more service connections… The Proposed Project is located within the City Limits and the Proposed Project will be served by the COSMUD. Therefore, the COSMUD is the identified public water system for the Proposed Project.

3.4 Does the City have an adopted Urban Water Management Plan (UWMP) and does the UWMP include the projected water
demand for the Proposed Project?
Water Code Section 10910(c)(1) The city or county, at the time it makes the determination required under Section 21080.1 of the Public Resources Code, shall request each public water system identified pursuant to subdivision (b) to determine whether the projected water demand associated with a proposed project was included as part of the most recently adopted urban water management plan adopted pursuant to Part 2.6 (commencing with Section 10610).

The most recent COSMUD UWMP ( 2020 UWMP) was adopted by City Council in June 2021 and is incorporated by reference into this WSA .4 The 2020 UWMP included water demand projections for current water demands within the COSMUD water service area (baseline demand) and anticipated water demands associated with future development projects and planning areas within the COSMUD water service area through 2045, including projected water demand for the Proposed Project.

The ability of the COSMUD to meet the projected water demands for the Proposed Project is described in Section 7 of this WSA.

4 West Yost. June 2021. City of Stockton 2020 Urban Water Management Plan.

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4.0 CITY OF STOCKTON MUNICIPAL UTILITIES DEPARTMENT WATER

SERVICE AREA

4.1 Water Service Area
The City is located in north-central California, approximately 70 miles east of the San Francisco Bay Area and 50 miles south of Sacramento. California State Highway 99 and Interstate 5 run north and south through the City on the east and west boundaries, respectively, and California State Highway 4 (the Crosstown Freeway) connects the two. The San Joaquin River flows from the south and terminates at the Delta area of Central Stockton.

The COSMUD provides water service to North and South Stockton while the central portion of the City is served by California Water Service (Cal Water). North Stockton is primarily residential, and South Stockton is largely comprised of residential (on the west side), industrial and agricultural land uses. The COSMUD water service area extends beyond the City Limits into unincorporated San Joaquin County, in conjunction with the City’s General Plan. The COSMUD provides water service as new developments are approved within its water service area and/or annexed into the City.

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4.2 Population
The existing (2020) population for the COSMUD water service area was estimated in the 2020 UWMP to be 184,402 people. Population projections for 2025 through 2040 presented in the 2020 UWMP were estimated in the City’s 2021 Water Master Plan Update5. These projections through 2040 were based on future land uses as defined in the City’s 2040 General Plan Update (GPU) and the April 2020 City of Stockton Sphere of Influence Plan/Municipal Service Review (SOI/MSR). Finally, as 2045 is outside of the SOI/MSR Report and 2021 Water Master Plan Update planning horizon, an annualized growth rate of

1.44 percent was used to estimate the 2045 projected population for the 2020 UWMP.

Table 4-1 shows the COSMUD historical and projected population in five-year increments from 1995 to 2045.

Table 4-1. Historical and Projected Population for the COSMUD Water Service Area Time Frame Year Population
Historical(a)
1995 117,303
2000 135,716
2005 177,127
2010 178,387
2015 170,417
Projected(b)
2020 184,402
2025 188,601
2030 192,800
2035 239,380
2040 285,960
2045 307,150
(a) City of Stockton 2015 UWMP, Table 2-2, July 2016.
(b) City of Stockton 2020 UWMP, Table 3-2, June 2021.

5 West Yost. January 2021. City of Stockton 2021 Water Master Plan Update Chapter 3.

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4.3 Climate
The COSMUD water service area is located in the Central Valley of California and generally experiences hot, dry summers with daytime temperatures well over 100 degrees Fahrenheit (°F). Winter temperatures can drop to 30°F but are generally mild. A majority of the annual average 10.4 inches of rainfall generally falls from November through March. The average reference evapotranspiration (ETo) is 52.6 inches.

Table 4-2 summarizes the average temperature and rainfall data for the COSMUD water service area.

Table 3-1. Monthly Average Climate Data Summary
Month(a)
Standard Monthly
Average ET, inches
Average Total
Rainfall, inches
Average Temperature, degrees Fahrenheit
Maximum Minimum
Manteca (CIMIS Station No. 70, WRCC Station No. 045303)(a) January 1.11 1.65 53.7 36.3
February 1.96 1.35 61.1 39.3
March 3.54 1.52 66.3 42.1
April 5.09 0.95 72.4 45.2
May 6.77 0.21 80.9 50.5
June 7.73 0.09 88.6 55.9
July 8.01 0.12 93.2 59.2
August 7.04 0.23 91.5 58.5
September 5.16 0.24 87.7 55.9
October 3.41 0.97 77.7 49.2
November 1.70 1.58 61.1 40.4
December 1.05 1.51 53.8 35.4
Totals 52.57 10.41 - -
Source: City of Stockton 2020 UWMP, Table 3-1, June 2021. (a) Period of record is 1971 to 2000.

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5.0 CITY OF STOCKTON MUNICIPAL UTILITIES DEPARTMENT WATER

DEMANDS
Water Code Section 10910(c)(2) If the projected water demand associated with the proposed project was accounted for in the most recently adopted urban water management plan, the public water sys tem may incorporate the requested information from the urban water management plan in preparing the elements of the assessment required to comply with subdivisions (d), (e), (f), and (g).

The descriptions provided below for the COSMUD water demands have be en taken, for the most part, from the 2020 UWMP, which was adopted in June 2021.

5.1 Historical and Existing Water Demand
The COSMUD water demand decreased significantly from 2012 to 2015 due to drought conditions and associated conservation measures. However, water demands have rebounded somewhat in recent years with the end of drought conditions.

Table 5-1 shows the COSMUD historical water demand from 2012 to 2020.

Table 5-1. Historical Potable Water Demand (includes Non-Revenue Water), AFY Condition 2012 2013 2014 2015 2016 2017 2018 2019 2020(b) Total Water Demand 37,100 36,692 31,603 26,312 27,845 29,241 30,103 30,684 34,404 (a) 2012 through 2019 source: City of Stockton 2021 Water Master Plan Update, Table 3-1, January 2021. (b) 2020 source: City of Stockton 2020 UWMP, Table 4-2, June 2021.

5.2 Future Water Demand
Projected future water demands presented in the City’s 2020 UWMP used land-use based water demand projections developed for the City’s 202 1 Water Master Plan Update. Water demand projections were based on the anticipated growth within the COSMUD water service area as defined by City’s 2040 GPU and confirmed with the City’s Community Development Department; the Proposed Project is included in these projections. Projected water demands for 2045 are assumed to be the same as projected water demands in 2040 since the development of future planned developments beyond 2040 is not defined in the City’s 2040 GPU.

Projected water demands for the COSMUD water service area are summarized in Table 5-2 and indicate a 39 percent increase in water demand from 2020 to 2045.

Table 5-2. Summary of Future Water Demand (includes Non-Revenue Water), AFY Demand Projection Source 2025 2030 2035 2040 2045
2020 UWMP 34,789 37,878 43,161 48,444 48,444
Source: City of Stockton 2020 UWMP, Table 4-3, June 2021.

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5.3 Dry Year Water Demand
For planning purposes and to be conservative, the COSMUD assumes no reduction in water demand during dry years. The adopted Water Shortage Contingency Plan, outlined in Appendix I of the 2020 UWMP, includes a six-stage plan describing specific actions to reduce water demand by up to and greater than 50 percent in the event of a water supply shortage or other emergency.

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6.0 CITY OF STOCKTON MUNICIPAL UTILITIES DEPARTMENT WATER

SUPPLIES
Water Code Section 10910(c)(2) If the projected water demand associated with the proposed project was accounted for in the most recently adopted urban water management plan, the public water system may incorporate the requested information from the urban water management plan in preparing the elements of the assessment required to comply with subdivisions (d), (e), (f) and (g).

Water Code Section 10910(d)(1) The assessment required by this section shall include an identification of any existing water supply entitlements, water rights, or water service contracts relevant to the identified water supply for the proposed project, and a description of the quantities of water received in prior years by the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), under the existing water supply entitlements, water rights, or water service contra cts.

Water Code Section 10910(d)(2) An identification of existing water supply entitlements, water rights, or water service contracts held by the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), shall be demonstrated by providing information related to all of the following:
(A) Written contracts or other proof of entitlement to an identified water supply. (B) Copies of a capital outlay program for financing the delivery of a water supply that has been adopted by the public water system.
(C) Federal, state, and local permits for construction of necessary infrastructure associated with delivering the water supply.
(D) Any necessary regulatory approvals that are required in order to be able to convey or deliver the water supply.

Water Code Section 10910(e) If no water has been received in prior years by the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), under the existing water supply entitlements, water rights, or water service contracts, the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), shall also include in its water supply assessment pursuant to subdivision (c), an identification of the other public water systems or water service contract-holders that receive a water supply or have existing water supply entitlements, water rights, or water service contracts, to the same source of water as the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), has identified as a source of water supply within its water supply assessments.

The Proposed Project, if approved by the City, is anticipated to be served from the COSMUD existing and future portfolio of water supplies. The inclusion of existing and planned future water supplies is specifically allowed by the Water Code:

Water Code Section 10631(b): Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a).

The water supply for the Proposed Project will have the same water supply reliability and water quality as the water supply available to the other COSMUD existing and future water customers. Proponents of the Proposed Project will provide their proportionate share of required funding to the COSMUD for the acquisition and delivery of treated potable water supplies to the Proposed Project area.

The water supplies needed to serve the Proposed Project (together with existing water demands and planned future uses) are predominantly described in the City’s 2020 UWMP. When relevant, t he descriptions provided below have been updated with information provided by COSMUD staff.

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6.1 Existing Potable Water Supplies
The COSMUD currently receives water supply from the following sources:
• Surface water from the San Joaquin River that is diverted at the Intake Pump Station on Empire Tract located in the Sacramento-San Joaquin Delta (Delta) and treated at the City’s Delta Water Treatment Plant (DWTP), supplemented by surface water from the Mokelumne River diverted and conveyed by Woodbridge Irrigation District (WID), and treated at the City’s DWTP, when the City’s San Joaquin River supplies are curtailed; • Surface water from the Mokelumne River diverted and conveyed by WID, and treated at the City’s DWTP;
• Potable water purchased from Stockton East Water District (SEWD); and • Groundwater pumped from City owned and operated wells from the underlying Eastern San Joaquin Groundwater Subbasin.

Water from SEWD can be conveyed to both the North and South Stockton distribu tion systems. SEWD also supplies the COSMUD Walnut Plant service area that is surrounded by the Cal Water system through two interconnects. Cal Water conveys SEWD supply to the Walnut Plant service area via a wheeling agreement with COSMUD. Water supplies from local groundwater wells are used to supply both the COSMUD North and South Stockton water service areas. The Proposed Project will be served by the North Stockton water system.

To improve water supply resiliency and enhance water supply availability, the City plans to explore the potential of surface water/stormwater capture for the Groundwater Recharge Improvement Project. The COSMUD may pursue additional water resource exchanges or transfers. The COSMUD has no sources of ocean water, brackish water, or groundwater that provide a viable opportunity for development of desalinated water as a long-term supply.

Each of the COSMUD existing water supplies is described in more detail below. Table 6-1 shows the COSMUD source of its existing water supplies and actual volume used in 2020.

Table 6-1. Existing (2020) Water Supplies
Supply Source
Additional Detail on Water
Supply Actual Volume, AFY
Purchased Water (treated surface water) SEWD 6,939
Purchased Water (untreated surface water) WID 8,657
Surface Water (untreated) San Joaquin River 9,970
Groundwater Eastern San Joaquin Subbasin 8,662
Total 34,228
Source: City of Stockton 2020 UWMP, Table 6-13, June 2021.

6.1.1 Purchased Water
The City purchases treated potable water from SEWD and untreated surface water from WID as described below.

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6.1.1.1 Stockton East Water District
SEWD is a wholesale water supplier that provides treated potable water to the urban water retailers within the Stockton Metropolitan Area, including COSMUD, Cal Water, and two small maintenance districts in the County (Urban Contractors). SEWD receives and treats surface water from New Melones Reservoir and New Hogan Reservoir through agreements with the United States Bure au of Reclamation (USBR). SEWD has filed several water right applications to divert excess wet weather flow from Calaveras River, Littlejohns Creek, and other tributaries. The applications are currently undergoing the permitting process with the State Water Resources Control Board (State Water Board).

To alleviate severe groundwater overdraft in the region, SEWD constructed the Dr. Joe Waidhofer Water Treatment Plant (DJWWTP) with a capacity of 30 million gallons per day ( mgd) in the mid -1970s. Since then, the DJWWTP has been expanded to a current capacity of 62 mgd.

6.1.1.2 Woodbridge Irrigation District
WID provides agricultural water supply north of the City boundaries. When the DWTP is curtailed from diverting water from the San Joaquin River, the COSMUD obtains untreated surface water from WID to supplement its water supply. WID’s water supply is from the Mokelumne River.

In 2008, COSMUD executed a 40 -year purchase agreement with WID for 6,500 AFY for municipal and industrial water use. This water augments supply to the DWTP when supply from the San Joaquin River is not available due to environmental restrictions. The water is conveyed to the DWTP through WID’s Wilkerson Canal system and Pixley lateral pipeline for treatment and conveyance to the COSMUD water service area.

The COSMUD 2008 contract with WID includes a provision for increase in water supply as WID -served agricultural lands in the northern part of the City are annexed to the City for municipal and industrial use.

Under this contract, an additional 6,500 AFY of WID supply will become available to the City at a rate of

3.0 AFY per acre annexed. WID supply may potentially increase from 6,500 AFY to 13,000 AFY by 2030.

6.1.2 Surface Water
Water supply from the San Joaquin River is a recent addition to the COSMUD water supply portfolio since the completion of the DWTP in 2012 and currently provides a significant portion of existing water supplies.

The City has a water right to Delta water because portions of the COSMUD water service area fall within the legally defined Delta and area of origin. Water supply from the San Joaquin River and substantially all of the groundwater that the COSMUD pumps are delivered primarily to the North Stockton water system.

6.1.2.1 Water Right Permit
The City’s 1996 water right application with the State Water Board requested an ultimate diversion of 125,900 AFY to address the projected long-term demands through 2050. The State Water Board bifurcated the water right application into two separate applications, Applications 30531A and 30531B.

Application 30531A proposed diversions of up to 33,600 AFY from the Delta and the Place of Use is confined to the City’s 1990 General Plan boundary. Through this application, the City was granted a water right permit under Water Code Section 1485. The City ’s water right permit from the State Water Board was issued on March 8, 2006 , under Water Right Permit 21176. Application 30531B, which proposed EXHIBIT 1
diversions of up to 92,300 AFY, is currently unpermitted. The City plans to continue the application process for this application to help meet the City’s future water demands.

Under Water Code Section 1485, Water Right Permit 21176 allows the City to divert from the San Joaquin River as much water as the City’s wastewater treatment plant discharges into the San Joaquin River under an indirect potable reuse strategy. The quantity is permitted up to 33,600 AFY from the San Joaquin River under Water Right Permit 21176. However, Section 1485 water is subject to pumping restriction in some months due to environmental restrictions.

The City’s supply from the San Joaquin River is curtailed annually from February 15th to June 15th due to U.S. Department of Fish and Wildlife Service , California Department of Fish and Wildlife, and National Marine Fisheries Service restrictions. When water diversion is curtailed, COSMUD obtains supplemental water supply from WID.

If the current pumping restrictions for Water Right Permit 21176 remain in place, the City may need the additional water supply it has applied for under Part B of the City’s Water Right ( Application 30531B) between 2055 and 2060. The City estimates that planning and environmental analysis efforts related to Application 30531B would start between 2025 and 2035. The City will continue to evaluate these dates approximately every five years when it prepares future Urban Water Management Plan updates.

6.1.2.2 Delta Water Treatment Plant
Subsequent to the State Water Board water right permit issuance for Application 30531A, the COSMUD proceeded with Phase 1 of its Delta Water Supply Project with an initial treatment plant capacity of 30 mgd. The DWTP and associated water supply facilities were comple ted and commenced operation in 2012. Since completion of the DWTP, the City has exercised its water right to divert water through its intake facility on the San Joaquin River.

Surface water curtailments are possible in dry years and can be offset with addi tional groundwater use and/or demand reduction through implementation of the City’s Water Shortage Contingency Plan.

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6.1.3 Groundwater
Water Code Section 10910(f) If a water supply for a proposed project includes groundwater, the following additional information shall be included in the water supply assessment.

Water Code Section 10910(f)(1) A review of any information contained in the urban water management plan relevant to the identified water supply for the proposed project.

Water Code Section 10910(f)(2) A description of any groundwater basin or basins from which the proposed project will be supplied. For those basins for which a court or the board has adjudicated the rights to pump groundwater, a copy of the order or decree adopted by the cour t or the board and a description of the amount of groundwater the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), has the legal right to pump under the order or decree. For basins that have not been adjudicated, information as to whether the department has identified the basin or basins as overdrafted or has projected that the basin will become overdrafted if present management conditions continue, in the most current bulletin of the department that characterizes the condition of the groundwater basin, and a detailed description by the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), of the efforts being undertaken in t he basin or basins to eliminate the long-term overdraft condition.

Water Code Section 10910(f)(3) A detailed description and analysis of the amount and location of groundwater pumped by the public water system, or the city or county if either is required t o comply with this part pursuant to subdivision (b), for the past five years from any groundwater basin from which the proposed project will be supplied. The description and analysis shall be based on information that is reasonably available, including, bu t not limited to, historical use records.

A detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the public water system, or the city or county if either is required to comply with this part pursuant to subdivision (b), from any basin from which the proposed project will be supplied. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historical use records.

Water Code Section 10910(f)(4) An analysis of the sufficiency of the groundwater from the basin or basins from which the proposed project will be supplied to meet the projected water demand associated with the proposed project.

A water assessment shall not be required to include the information required by this paragraph if the public water system determines, as part of the review required by paragraph (1), that the sufficiency of groundwater necessary to meet the initial and projected water demand associated with the project was a ddressed in the description and analysis required by paragraph (4) of subdivision (b) of Section 10631.

6.1.3.1 Groundwater Overview
The COSMUD has groundwater wells located in the North Stockton and South Stockton water systems.

These wells are used conjunctively to meet peak summer demands or during dry years when available surface water supplies may be limited. The City has partnered with other users through the Eastern San Joaquin Groundwater Authority (GWA) to manage the groundwater basin.

The City has determined that the sustainable groundwater yield is 0.75 AFY/acre, or approximately 50,000 AFY for the overall City area . To establish the projected groundwater supply that is reasonably available within the COSMUD service area, COSMUD assumes that the reasonably available groundwater supply for the current water service area (approximately 38,500 acres) is pumped at 0.6 AFY/acre, equivalent to an annual groundwater supply of 23,100 AFY.

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6.1.3.2 Groundwater Basin Management
The groundwater basin underlying the City is the San Joaquin Valley Basin, Eastern San Joaquin Subbasin (5-22.01, Subbasin). The Subbasin is defined by the areal extent of unconsolidated to semi consolidated sedimentary deposits that are bounded by the Mokelumne River on the north a nd northwest; San Joaquin River on the west; Stanislaus River on the south; and consolidated bedrock on the east.

In 2014, the California legislature enacted the Sustainable Groundwater Manag ement Act ( SGMA) in response to continued overdraft of California’s groundwater resources. The Subbasin is one of 21 basins and subbasins identified by the California Department of Water Resources (DWR) as being in a state of critical overdraft. SGMA requires preparation of a groundwater sustainability plan to address measures necessary to attain sustainable conditions in the Subbasin. Sustainability is generally defined as long-term reliability of the groundwater supply and the absence of undesirable results from over pumping.

The City, along with fifteen other groundwater users and groundwater sustainability agencies, formed a GWA in 2017 in response to SGMA. In 2019, the GWA completed the Eastern San Joaquin Groundwater Subbasin Groundwater Sustainability Plan (GSP) to help achieve groundwater sustainability in the Subbasin by 2040. In general, the GSP shows that groundwater elevations have declined since the 1950s.

Water quality issues were detected on the west side of the Subbasin, some of which are from wells underlying the City. The GSP outlined the need to reduce overdraft conditions and identified 23 projects for potential development, along with management actions, that either replace groundwater use or supplement groundwater supplies to meet current and future wate r demands. The list of 23 potential projects included in the GSP represent a variety of project types including direct and in -lieu recharge, intra-basin water transfers, demand conservation, water recycling, and stormwater reuse to be undertaken by the member agencies. The GSP determined an estimated pumping offset and/or recharge need of 78,000 AFY Subbasin-wide to achieve sustainability. This amount may be reevaluated after additional data are collected and analyzed.6
From 2020 to 204 5, members of the G WA, including the City, will be monitoring and reporting their progress on implementing project s and studies and the impacts of their outreach. Evaluation will be conducted every five years.

6.1.3.3 Groundwater Use
The COSMUD uses groundwater conjunctively with its surface water supply sources, with groundwater generally used to meet increased water demands primarily in the summer months or during dry years when available surface water supplies may be limited. Wells are also depended on for emergency supply in the event of surface water supply interruptions.
6 Eastern San Joaquin Groundwater Authority, Eastern San Joaquin Groundwater Subbasin Groundwater Sustainability Plan, November 2019, Section 6.

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Historically, the local groundwater basin provided 100 percent of the COSMUD water supply. However, with SEWD surface water deliveries beginning in the 1980s and the completion and dedication of the DWTP and associated water supply infrastructure in 2012, the reliance on groundwater has significantly reduced. The annual volume of groundwater pumped by the COSMUD is shown in Table 6-2. Groundwater supply provided an average of 4,320 AFY, approximately 14 percent of the total COSMUD water supply between 2016 and 2020.

Table 6-2. Historical Groundwater Volume Pumped by the COSMUD, AFY Supply Source 2012 2013 2014 2015 2016 2017 2018 2019 2020 Groundwater 3,394 4,085 7,228 6,619 3,748 2,965 3,236 3,778 8,662 Source: City of Stockton 2020 UWMP, Table 6-3, June 2021.

6.1.3.4 Groundwater as a Future Water Supply
In the future, the COSMUD plans to use less groundwater in wet and average years. It plans to continue groundwater use to meet peak demand and in dry years to make up for reductions in surface water deliveries.

6.2 Additional Planned Future Potable Water Supplies
In addition to the existing potable water supplies described above, the COSMUD has additional planned future potable water supplies to meet existing and projected future water demands , including those associated with the Proposed Project. The inclusion of planned future water supplies in this WSA is specifically allowed by the Water Code:

Water Code Section 10631(b): Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a).

As discussed above, the City’s application for an additional water right from the San Joaquin River for up to 92,300 AFY, is currently unpermitted. The City plans to pursue this application in the future to meet the COSMUD ultimate water demand. Pursuant to the grant of this additional water right by the State Water Board, several expansion projects are planned for the DWTP , as needed, from the current capacity of 30 mgd, up to 160 mgd.

As discussed in Section 6.1.1.2, the City expects an additional 6,500 AFY of WID supply will become available to the City at a rate of 3.0 AFY per acre annexed, per the City’s 2008 contract with WID. This WID supply may potentially increase from 6,500 AFY to 13,000 AFY by 2030.

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6.3 Summary of Existing and Additional Planned Future Water Supplies Table 6-3 provides a summary of the COSMUD projected water supply entitlements. A discussion of the future anticipated availability of these existing and additional planned future water supplies during dry years is provided in the next section.

Table 6-3. Projected Water Supplies
Supply Source
Additional Detail on
Water Supply
Reasonably Available Volume, AFY
2025 2030 2035 2040 2045
Purchased Water
(treated surface water) SEWD 24,300 24,300 24,300 24,300 24,300 Purchased Water
(untreated surface water) WID 6,500 13,000 13,000 13,000 13,000 Surface Water
(untreated) San Joaquin River 23,400 24,800 25,000 25,000 25,000 Groundwater Eastern
San Joaquin Subbasin 23,100 23,100 23,100 23,100 23,100 Total 77,300 85,200 85,400 85,400 85,400
Source: City of Stockton 2020 UWMP, Table 6-14, June 2021.

Note: A normal year is assumed.

6.4 Water Supply Availability and Reliability
Water Code Section 10910 (c)(4) requires that a WSA include a discussion with regard to “whether total projected water supplies, determined to be available by the city or county for the project during normal, single dry, and multiple dry water years during a 20 -year projection, will meet the projected wate r demand associated with the proposed project, in addition to existing and planned future uses, including agricultural and manufacturing uses.” Accordingly, this WSA addresses these three hydrologic conditions through the year 2045. The reliability discussion presented in this section reflects Chapter 7 of the City’s 2020 UWMP.

Factors contributing to potential reductions in the COSMUD water supplies include legal limitations due to water rights and contracts that may limit the quantity of water available, environmental constraints, and reductions in availability due to climatic factors. The surface water supplies delivered to the COSMUD is subject to reductions during single and multiple dry years (seasonal and climatic shortages) as discussed below.

Also, in response to drought conditions and the State of Emergency proclaimed by Governor Brown, first in January 2014 and again in April 2015, this WSA provides a discussion of the availability and reliability of the COSMUD available water supplies to mee t water demands in the event that the COSMUD surface water supplies are limited under emergency water supply conditions.

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6.4.1 Reliability by Water Source

6.4.1.1 SEWD Supply
Review of SEWD’s water deliveries from Fiscal Years 2012 through 2018 show that COSMUD received approximately one-third of the total SEWD water supply to the Urban Contractors.7 SEWD estimated that approximately 72,800 AF will be available to the Urban Contractors. Thus, the normal year volume entered for the COSMUD water service area is estimated to be 24,300 AF, approximately one-third of 72,800 AF.

Per the Second Amended Contract, SEWD is required to deliver a minimum of 20,000 AF to the Urban Contractors. Thus, the water supply availability for the City during the single dry year is assumed to b e approximately one-third of the SEWD contractual minimum volume of 20,000 AF.

The water supply availability for the five -consecutive-dry years reflects the City’s deliveries from SEWD during the most recent Statewide drought. Available water supplies for the first and fifth years of the five-consecutive-year drought are estimated to be normal year supplies. Available SEWD supplies are reduced in the second year, and then further reduced to minimum deliveries (one-third on the contractual minimum volume) in the third and fourth years.

6.4.1.2 San Joaquin River Supply
Under Water Code Section 1485 , Water Right Permit 21176 allows the City to divert from the San Joaquin River as much water as the City’s wastewater treatment plant discharges into the San Joaquin River. The quantity is permitted up to 33,600 AFY from the San Joaquin River under Water Right Permit 21176. However, Section 1485 water is subject to pumping restrictions in some months due to environmental restrictions.

The City’s Water Right Permit summarizes San Joaquin River water available for diversion based on the City’s wastewater treatment plant discharge and pumping restrictions due to the environmental restrictions for 2012 through 2040. If the current pumping restrictions for Permit 21176 remain in place, the City may need the additional water supply it has applied for under Part B of the City’s Water Right (Application 30531B ) between 2055 and 2060. The City estimates that planning and environmental analysis efforts related to Application 30531B would start between 2040 and 2045. The City will continue to evaluate these dates approximately every five years when it prepares future Urban Water Management Plan updates.
7 Stockton East Water District. Fiscal Years 2012/2013 to 2018/2019. Schedule D.

EXHIBIT 1
Since the Petition for Extension of Time was completed prior to 2020, the volumes for 2020 through 2040 are projections of the anticipated volume available for diversion from the San Joaquin River and are based on the historical volumes available under similar hydrologic years, as shown in Table 6-4.

Table 6-4. Anticipated San Joaquin River Water Supplies Year Type Base Year
Volume Available,
AFY
Percent of Average
Supply
Normal Year 2018 20,500 100
Single-Dry Year 2015 19,100 93
Consecutive Dry Year 1st Year 2013 18,300 89
Consecutive Dry Year 2nd Year 2014 19,000 93
Consecutive Dry Year 3rd Year 2015 19,100 93
Consecutive Dry Year 4th Year 2016 18,100 88
Consecutive Dry Year 5th Year 2017 21,400 104
Source: City of Stockton 2020 UWMP, Table 7-3, June 2021.

6.4.1.3 WID Supply
Raw water from WID augments supply to the DWTP if the San Joaquin River water is not available due to environmental restrictions. Consistent with the 2020 UWMP, a slight supply reduction from 6,500 AF to 4,500 AF is assumed during a single dry year and the third and fourth years of the five -consecutive- year drought.

6.4.1.4 Groundwater Supply
COSMUD plans to use its groundwater supply conjunctively with the available treated surface water supplies and purchased water supplies. Available groundwater supply is based on the projected groundwater supply that is reasonably available. COSMUD assumes that the reasonably available groundwater for the current water service area (approximately 38,500 acres) is pumped at 0.6 AFY/ac, equivalent to an annual groundwater supply of 23,100 AFY. This volume is assumed to be available under all year types.

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6.4.2 Summary of Available Water Supplies Under Normal, Single Dry, and Multiple Dry Years The reliability of each of the COSMUD existing and additional planned water supplies and their projected availability during normal, single dry, and multiple dry years, as described in Chapter 7 of the 2020 UWMP, is summarized in Tables 6-5, 6-6, and 6-7, respectively.

Table 6-5. Normal Year Water Supply, AFY
Supply Source 2025 2030 2035 2040 2045
SEWD 24,300 24,300 24,300 24,300 24,300
WID 6,500 13,000 13,000 13,000 13,000
San Joaquin River 23,400 24,800 25,000 25,000 25,000
Groundwater 23,100 23,100 23,100 23,100 23,100
Total 77,300 85,200 85,400 85,400 85,400
Source: City of Stockton 2020 UWMP, Table 7-6, June 2021.

Table 6-6. Single Dry Year Water Supply, AFY
Supply Source 2020 2025 2030 2035 2040
SEWD 6,700 6,700 6,700 6,700 6,700
WID 4,500 9,000 9,000 9,000 9,000
San Joaquin River 21,800 23,100 23,300 23,300 23,300
Groundwater 23,100 23,100 23,100 23,100 23,100
Total 56,100 61,900 62,100 62,100 62,100
Source: City of Stockton 2020 UWMP, Table 7-7, June 2021.

EXHIBIT 1
Table 6-7. Multiple Dry Years Water Supply, AFY
Supply 2025 2030 2035 2040 2045
First Year
SEWD 24,300 24,300 24,300 24,300 24,300
WID 6,500 13,000 13,000 13,000 13,000
San Joaquin River 20,900 22,100 22,300 22,300 22,300
Groundwater 23,100 23,100 23,100 23,100 23,100
Supply Total 74,800 82,500 82,700 82,700 82,700
Second Year
SEWD 15,500 15,500 15,500 15,500 15,500
WID 6,500 13,000 13,000 13,000 13,000
San Joaquin River 21,700 23,000 23,200 23,200 23,200
Groundwater 23,100 23,100 23,100 23,100 23,100
Supply Total 66,800 74,600 74,800 74,800 74,800
Third Year
SEWD 6,700 6,700 6,700 6,700 6,700
WID 4,500 9,000 9,000 9,000 9,000
San Joaquin River 21,800 23,100 23,300 23,300 23,300
Groundwater 23,100 23,100 23,100 23,100 23,100
Supply Total 56,100 61,900 62,100 62,100 62,100
Fourth Year
SEWD 6,700 6,700 6,700 6,700 6,700
WID 4,500 9,000 9,000 9,000 9,000
San Joaquin River 20,700 21,900 22,100 22,100 22,100
Groundwater 23,100 23,100 23,100 23,100 23,100
Supply Total 55,000 60,700 60,900 60,900 60,900
Fifth Year
SEWD 24,300 24,300 24,300 24,300 24,300
WID 6,500 13,000 13,000 13,000 13,000
San Joaquin River 24,400 25,900 26,100 26,100 26,100
Groundwater 23,100 23,100 23,100 23,100 23,100
Supply Total 78,300 86,300 86,500 86,500 86,500
Source: City of Stockton 2020 UWMP, Table 7-9, June 2021.

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7.0 DETERMINATION OF WATER SUPPLY SUFFICIENCY BASED ON
REQUIREMENTS OF SB 610
Water Code Section 10910 states:
10910(c)(4) If the city or county is required to comply with this part pursuant to subdivision (b), the water supply assessment for the project shall include a discussion with regard to whether the total projected water supplies, determined to be available by the city or county for the project during normal, single dry, and multiple dry water years during a 20-year projection, will meet the projected water demand associated with the proposed project, in addition to existing and planned future uses, including agricultural and manufacturing uses.

Pursuant to Water Code Section 10910(c)(4), and based on the technical analyses described in this WSA, the total projected water supplies determined to be available for the Proposed Pr oject during normal, single dry, and multiple dry years during a 20 -year projection will meet the projected water demand associated with the Proposed Project, in addition to existing and planned future uses.

Table 7-1 summarizes the projected availability of the COSMUD existing and planned future potable water supplies compared with projected water demands in normal, single dry and multiple dry years through buildout. As stated in Section 3.4, the Proposed Project’s water demands were included in future water demand projections presented in the 2020 UWMP and in this table.

EXHIBIT 1
Table 7-1. S
ummary of Water Demand Versus Water Supply During Various Hydrologic Conditions 2025 203
0 2035 2040 2045
Available Water Supply(a)
77,300 85,20
0 85,400 85,400 85,400
Total Water Demand(b)
34,789 37,87
8 43,161 48,444 48,444
Potential Surplus (Deficit) 42,511 47,322 42,239 36,956 36,956 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(c)
56,100 61,90
0 62,100 62,100 62,100
Total Water Demand(b)
34,789 37,87
8 43,161 48,444 48,444
Potential Surplus (Deficit) 21,311 24,022 18,939 13,656 13,656 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(d)
74,800 82,50
0 82,700 82,700 82,700
Total Water Demand(b)
34,789 37,87
8 43,161 48,444 48,444
Potential Surplus (Deficit) 40,011 44,622 39,539 34,256 34,256 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(d)
66,800 74,60
0 74,800 74,800 74,800
Total Water Demand(b)
35,407 38,93
5 44,218 48,444 48,444
Potential Surplus (Deficit) 31,393 35,665 30,582 26,356 26,356 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(d)
56,100 61,90
0 62,100 62,100 62,100
Total Water Demand(b)
36,025 39,99
1 45,274 48,444 48,444
Potential Surplus (Deficit) 20,075 21,909 16,826 13,656 13,656 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(d)
55,000 60,70
0 60,900 60,900 60,900
Total Water Demand(b)
36,642 41,04
8 46,331 48,444 48,444
Potential Surplus (Deficit) 18,358 19,652 14,569 12,456 12,456 Percent Shortfall of Demand -- -- -- -- --
Available Water Supply(d)
78,300 86,30
0 86,500 86,500 86,500
Total Water Demand(b)
37,260 42,10
4 47,387 48,444 48,444
Potential Surplus (Deficit) 41,040 44,196 39,113 38,056 38,056 Percent Shortfall of Demand -- -- -- -- --
(a) Refer t
o Table 6-5.
(b) Refer to Table 5-2.
(c) Refer to Table 6-6.
(d) Refer to Table 6-7.

Multiple Dry
Year 3
Multiple Dry
Year 4
Multiple Dry
Year 5
Normal, Single Dry, and Multiple Dry Y
ears, AFY
Hydrologic Condition
Multiple Dry
Year 1
Multiple Dry
Year 2
Normal Year
Single Dry Year
Multiple Dry Years
N-129-60-2
2-53\R-WSA
City of Stockt
on
Cannery
Park Project WSA
Last Revi
sed: 11-15-22
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8.0 VERIFICATION OF SUFFICIENT WATER SUPPLY BASED ON THE REQUIREMENTS OF SB 221
The Proposed Project, with up to 617 residential dwelling units, is also subject to the requirements of SB 221 (Government Code section 66473.7). SB 221 applies to projects with residential subdivisions with more than 500 dwelling units (such as the Propos ed Project) and requires that the water supplier (COSMUD) provide a written verification that the water supply for the Proposed Project is sufficient.

Verification must demonstrate supply sufficiency by showing that water supplies available during Normal, Single Dry and Multiple Dry years within a 20-year projection will meet the projected demand associated with the Proposed Project, in addition to existing and planned future uses, including, but not limited to, agriculture and industrial uses.

Per the requirements of SB 221, the following must be considered:
• Historical Water Deliveries
• Urban Water Shortage Contingency Analysis Prepared for the UWMP • Supply Reduction for Specific Water Use Sectors
• Amount of Water Expected from Specified Supply Projects The 2020 UWMP and this WSA for the Proposed Project provide the documentation required to comply with SB 221 and demonstrate that COSMUD’s supplies are sufficient to meet the projected demand associated with the Proposed Project, in addition to existing and planned future uses. The specific considerations to be evaluated for the SB 221 verification are described below and reference applicable sections of the 2020 UWMP and this WSA.

8.1 Historical Water Deliveries
COSMUD’s historical and current water supplies are summarized in Section 6 of this WSA and described in detail in Chapter 6 of the 2020 UWMP. The use of these supplies will continue into the future as described in Section 6 of this WSA and as shown in Table 6-3 of this WSA.

Water supply availability and r eliability during Normal, Single Dry and Multiple Dry years is summarized in Section 6 of this WSA and described in detail in Chapter 7 of the 2020 UWMP.

8.2 Projected Water Demand by Customer Sector
Projected potable water demands in COSMUD’s water service area are described in Section 5 of this WSA based on information provided in Chapter 4 of the 2020 UWMP. Projected water demand by customer sector within COSMUD’s water service area is documented in the 2020 UWMP and is summarized in Table 8-1.

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Table 8-1. Actual and Projected Water Demands by Customer Sector Water Source
2020
(actual)(a) 2025(b) 2030(b) 2035(b) 2040(b) 2045(b)
Potable Water, af/yr
Single Family Residential 15,758 15,782 16,066 19,259 22,451 22,451 Multi-Family Residential 3,030 2,927 2,976 3,494 4,012 4,012 Commercial 4,700 4,793 4,856 5,149 5,442 5,442
Industrial 709 3,397 5,797 6,076 6,355 6,355
Landscape 3,255 3,162 3,208 3,786 4,363 4,363
Sales to Other Agencies 1,830 1,830 1,830 1,830 1,830 1,830 Other 132 0 0 0 0 0
Losses 4,991 2,898 3,145 3,568 3,991 3,991
Potable Water Demand Total 34,404 34,789 37,878 43,161 48,444 48,444 (a) From Table 4-2 in the City of Stockton 2020 UWMP.
(b) From Table 4-3 in the City of Stockton 2020 UWMP.

8.3 Water Shortage Contingency Analysis
The City’s Water Shortage Contingency Plan (WSCP) , included as an appendix to the City’s 2020 UWMP, describes the City’s strategic plan in preparation for and responses to water s hortages. It includes water shortage stages and associated actions that will be implemented in the event of a water supply shortage, including situations when catastrophic water supply interruptions occur due to regional power outage, earthquake, or other disasters; and when drought occurs. As part of the WSCP, the City’s legal authorities, communication protocols, compliance and enforcement, and monitoring and reporting are included.

Stockton Municipal Code ( SMC) Chapter 13.28 Water Co nservation and SMC Chapter 13.32 Water Shortage Emergencies supports the City’s WSCP actions.

The six Stages of Action outlined in the City’s WSCP are intended to promote the proper management and distribution of water supplies during a drought or emergenc y situation. Each of the six stages describes specific actions to be taken by individual water customer sectors to achieve the water conservation requirement of that particular stage. All of the stages allow for adequate water supply to protect public health and safety and satisfy the fire protection needs of the City. Each of the six stages corresponds to a specific water demand reduction goal. These potable water demand reduction goals are based on the potential supply cutbacks during times of drought, wi th up to and greater than a 50 percent supply reduction as mandated by the UWMP Act.

If an emergency were to occur, or if drought conditions occurred, requiring the City to implement its WSCP, all of COSMUD’s water customers, including those within the Proposed Project, would be subject to the same water conservation measures and water use restrictions as included in City’s WSCP.

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8.4 Future Water Supplies to Serve Water Demands Associated with Buildout of the Proposed Project
As described in this WSA, the following water supplies will be used to serve the projected COSMUD water demands, including the projected water demands associated with buildout of the Proposed Project:
• Surface water from the San Joaquin River that is diverted at the Intake Pump Station on Empire Tract located in the Sacramento-San Joaquin Delta (Delta) and treated at the City’s Delta Water Treatment Plant (DWTP), supplemented by surface water from the Mokelumne River diverted and conveyed by Woodbridge Irrigation District (WID), and treated at the City’s DWTP, when the City’s San Joaquin River supplies are curtailed; • Surface water from the Mokelumne River diverted and conveyed by WID, and treated at the City’s DWTP;
• Potable water purchased from Stockton East Water District (SEWD); and • Groundwater pumped from City owned and operated wells from the underlying Eastern San Joaquin Groundwater Subbasin.

The availability and reliability of these supplies are described in Section 6 of this WSA.

8.5 Verification of Sufficient Water Supply
As described in Section 7 of this WSA, the total projected water supplies determined to be available for the Proposed Project during normal, single dry, and multiple dry years during a 20 -year projection will meet the projected water demand associated with the Proposed Project, in addition to e xisting and planned future uses, including, but not limited to, agriculture and industrial uses.

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9.0 WATER SUPPLY ASSESSMENT APPROVAL PROCESS
Water Code Section 10910 (g)(1) Subject to paragraph (2), the governing body of each public water system shall submit the assessment to the city or county not later than 90 days from the date on which the request was received. The governing body of each public water system, or the city or county if either is required to comply with this act pursuant to subdivision (b), shall approve the assessment prepared pursuant to this section at a regular or special meeting.

Water Code Section 10911 (b) The city or county shall include the water supply assessment provided pursuant to Section 10910, and any information provided pursuant to subdivision (a), in any environmental document prepared for the project pursuant to Division 13 (commencing with Section 21000) of the Public Resources Code.

As the approving agency for the Proposed Project, the City must adopt this WSA at a regular or special meeting. Furthermore, the City must include this WSA in the EIR that is being prepared for the Proposed Project.

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10.0 REFERENCES
City of Stockton. December 2018. Envision Stockton 2040 General Plan.

Stockton East Water District. Fiscal Years 2012/2013 to 2018/2019. Schedule D.

Eastern San Joaquin Groundwater Basin Authority. November 2019. Eastern San Joaquin Groundwater Subbasin Groundwater Sustainability Plan.

West Yost. January 2021. City of Stockton Water Master Plan Update.

West Yost. June 2021. City of Stockton 2020 Urban Water Management Plan.

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