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California Water Service Company

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California Water Service Company 2010 Urban Water Management Plan South San Francisco District ADOPTED June 2011



2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
Table of Contents
LIST OF FIGURES 5
LIST OF TABLES 6
CONTACT SHEET 9
1 PLAN PREPARATION 11
1 1 PURPOSE 11
1 2 COORDINATION 12
1 3 PLAN ADOPTION 13
1 4 WATER MANAGEMENT TOOLS 13
1 5 BAWSCA MEMBERSHIP 14
1 6 PLAN ORGANIZATION 14
1 7 IMPLEMENTATION OF PREVIOUS UWMP 16
2 SYSTEM DESCRIPTION 17
2 1 SERVICE AREA DESCRIPTION 17
2 2 SERVICE AREA POPULATION 19
2 3 SERVICE AREA CLIMATE 25
3 SYSTEM DEMANDS 27
3 1 DISTRIBUTION OF SERVICES 27
3 2 HISTORICAL AND CURRENT WATER DEMAND 28
3 3 WATER DEMAND PROJECTIONS 30
3 3 1 Senate Bill No 7 Baselines and Targets 34
3 3 2 Low Income Housing Projected Demands 39
3 4 TOTAL WATER USE 40
4 SYSTEM SUPPLIES 43
4 1 WATER SOURCES 43
4 2 IMPORTED WATER 44
4 2 1 Supply Assurance 47
4 3 SURFACE WATER 51
4 4 GROUNDWATER 51
4 4 1 Basin Boundaries and Hydrology 54
4 4 2 Groundwater Management Plan 54
4 5 RECYCLED WATER 55
4 5 1 Wastewater Collection 55
4 5 2 Estimated Wastewater Generated 55
4 5 3 Wastewater Treatment and Recycling 57
4 5 4 Potential Water Recycling in District 57
4 6 DESALINATED WATER 59
4 7 TRANSFER OR EXCHANGE OPPORTUNITIES 61
5 WATER SUPPLY RELIABILITY AND WATER SHORTAGE CONTINGENCY PLANNING 63
5 1 WATER SUPPLY RELIABILITY 63
5 2 DROUGHT PLANNING 66
5 2 1 Normal Year Comparison 68
5 2 2 Single Dry Year Comparison 69
5 2 3 Multiple Dry Year Comparison 70
5 3 FACTORS AFFECTING RELIABILITY OF SUPPLY 73
5 4 WATER QUALITY 74
5 5 WATER SHORTAGE CONTINGENCY PLAN 74
5 5 1 Water Shortage Contingency Plan Scope 75
Printed 7 8 2011 Page 3
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
5 5 2 Water Conservation Drought Preparation Team 76
5 5 3 Water Supply Allocation Plan 77
5 5 4 Allocation Methodology and Customer Information 77
5 5 5 Drought Stages 79
5 5 6 Water Supply Conditions and Trigger Levels 83
5 5 7 Water Use Restriction Enforcement 85
5 5 8 Analysis of Revenue and Expenditure Impacts 86
5 5 9 Catastrophic Water Supply Interruption 87
6 DEMAND MANAGEMENT MEASURES 89
6 1 BAWSCA WATER CONSERVATION IMPLEMENTATION PLAN 89
6 2 STATEWIDE URBAN WATER DEMAND REDUCTION POLICIES 90
6 3 CONSERVATION MASTER PLANS 92
6 4 WATER SAVINGS REQUIREMENTS 93
6 5 CONSERVATION PROGRAM ANALYSIS 96
6 6 CONSERVATION PROGRAM PORTFOLIO 99
7 CLIMATE CHANGE 103
7 1 INTRODUCTION 103
7 2 SFPUC STRATEGY 103
7 3 CAL WATER STRATEGY 104
7 3 1 Historical Climate Data Summary 106
7 4 CLIMATE CHANGE GUIDANCE 110
8 COMPLETED UWMP CHECKLIST 111
8 1 REVIEW CHECKLIST 111
APPENDIX A 1 RESOLUTION TO ADOPT UWMP 119
APPENDIX A 2 CORRESPONDENCES 121
APPENDIX A 3 PUBLIC MEETING NOTICE 123
APPENDIX B SERVICE AREA MAP 125
APPENDIX C WATER SUPPLY DEMAND AND PROJECTION WORKSHEETS 127
APPENDIX D DWR S GROUNDWATER BULLETIN 118 129
APPENDIX E TARIFF RULE 14 1 WATER CONSERVATION AND RATIONING PLAN 131
APPENDIX F WATER EFFICIENT LANDSCAPE GUIDELINES 132
APPENDIX G CONSERVATION MASTER PLAN 133
APPENDIX H WESTSIDE BASIN GROUNDWATER MANAGEMENT PLAN 135
APPENDIX I SFPUC WATER SALES CONTRACT 137
APPENDIX J SFPUC WATER SUPPLY AGREEMENT 139
Printed 7 8 2011 Page 4
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
List of Figures
Figure 2 1 1 General Location of South San Francisco District 17
Figure 2 1 2 Active Fault Lines 18
Figure 2 2 1 Approximated SAM with US Census 2010 Tract Map 19
Figure 2 2 2 Historical Projected Services 21
Figure 2 2 3 Estimated Population Comparison 23
Figure 2 2 4 Estimated Housing Comparison 24
Figure 2 3 1 Average Monthly Temperature and Rainfall 25
Figure 2 3 2 Monthly Average ETo Values 26
Figure 3 1 1 Distribution of Services 2010 27
Figure 3 2 1 Historical Sales 28
Figure 3 2 2 Historical Service Counts 28
Figure 3 2 3 Historical Demand per Service 29
Figure 3 2 4 Distribution of demand 2010 30
Figure 3 3 1 Historical Projected Demand 31
Figure 3 4 1 Historical Projected Sources 41
Figure 4 2 1 SFPUC Water System Improvement Program WSIP Projects 46
Figure 4 4 1 Average Ground Water Level for the District 52
Figure 4 5 1 Estimated Annual Wastewater Generated 56
Figure 5 2 1 Comparison of Annual Rainfall to Historical Average 66
Figure 7 3 1 The Climate Regions of California 106
Figure 7 3 2 Maximum Temperature Departure for Central Coast Region 108
Figure 7 3 3 Mean Temperature Departure for Central Coast Region 108
Figure 7 3 4 Minimum Temperature Departure for Central Coast Region 109
Figure 7 3 5 Annual Precipitation in Central Coast Region 110
Printed 7 8 2011 Page 5
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
List of Tables
Table 1 2 1 Coordination with Appropriate Agencies Table 1 12
Table 1 6 1 Plan Organization 14
Table 2 2 1 Summary of the 2000 and 2010 US Census Data 20
Table 2 2 2 Person and Unit Densities 20
Table 2 2 3 Population Current and Projected Table 2 22
Table 2 3 1 Average Annual Climate Table 3 25
Table 3 3 1 Actual 2005 Water Deliveries AF Table 3 32
Table 3 3 2 Actual 2010 Water Deliveries AF Table 4 32
Table 3 3 3 Projected 2015 Water Deliveries AF Table 5 32
Table 3 3 4 Projected 2020 Water Deliveries AF Table 6 33
Table 3 3 5 Projected 2025 and 2030 Water Deliveries AF Table 7 33
Table 3 3 6 Projected 2035 and 2040 Water Deliveries AF Table 7 33
Table 3 3 7 Cal Water Districts Sorted by Hydrologic Region 35
Table 3 3 8 Regional SBx7 7 Targets for Cal Water Districts in 35
Table 3 3 9 Base Period Ranges Table 13 37
Table 3 3 10 Daily Base Per Capita Water Use 10 Year Range Table 14 37
Table 3 3 11 Daily Base Per Capita Water Use 5 Year Range Table 15 38
Table 3 3 12 South San Francisco District SBx7 7 Targets 38
Table 3 3 13 Low income Projected Water Demands Table 8 39
Table 3 4 1 Additional Water Uses and Losses AFY Table 9 and 10 40
Table 3 4 2 Total Water Use Actual and Projected AFY Table 11 40
Table 3 4 3 Demand projections provided to wholesale suppliers AFY Table 17 41
Table 4 1 1 Available Water Supplies Table 16 44
Table 4 4 1 Amount of Groundwater Pumped AFY Table 18 53
Table 4 4 2 Amount of Groundwater projected to be pumped AFY Table 19 54
Table 4 5 1 Recycled Water Wastewater Collected and Treated AFY Table 21 56
Table 4 5 2 Disposal of wastewater non recycled AF Year Table 22 56
Table 4 5 3 Recycled Water Potential Future Use AFY Table 23 57
Table 5 1 1 WSIP Reliability Goals and Objectives 63
Table 5 2 1 Basis of Water Year Data Table 27 67
Table 5 2 2 Supply Reliability gal service yr Table 28 67
Table 5 2 3 Supply Reliability Current Water Sources AFY Table 31 68
Table 5 2 4 Supply and Demand Comparison Normal Year AF Table 32 69
Table 5 2 5 Supply and Demand Comparison Single Dry Year AF Table 33 70
Table 5 2 6 Supply And Demand Comparison Multiple Dry Year Events AFY Table 34 71
Table 5 3 1 Factors Resulting In Inconsistency of Supply Table 10 73
Table 5 5 1 Demand Reduction Stage 1 Table 36 80
Table 5 5 2 Demand Reduction Stage 2 Table 36 81
Table 5 5 3 Demand Reduction Stage 3 Table 36 82
Table 5 5 4 Demand Reduction Stage 4 Table 36 83
Table 5 5 5 Water Supply Triggering Levels Table 35 84
Table 5 5 6 Annual Allocations Between SFPUC and Wholesale Customers 84
Table 6 2 1 MOU Best Management Practices 91
Table 6 4 1 SBx7 7 and MOU Gross Water Savings Requirements 93
Table 6 4 2 Adjusted Baseline Demand Projection 95
Printed 7 8 2011 Page 6
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
Table 6 4 3 New Program Savings Required for SBx7 7 and MOU Compliance 96
Table 6 5 1 Cal Water Conservation Programs 98
Table 6 6 1 Recommended Program Levels 100
Table 6 6 2 Projected Water Savings by Program 101
Table 7 3 1 Cal Water Districts Sorted by Climate Region 107
Table 8 1 1 Urban Water Management Plan Checklist organized by legislation number 111
Printed 7 8 2011 Page 7
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
California Water Service Company
2010 Urban Water Management Plan
Contact Sheet
This plan was prepared by the Water Resource Planning Group in California Water Service
Company s Engineering Department Thomas A Salzano Water Resources Planning
Supervisor is responsible for the plan s preparation and can be reached at the address and
telephone number listed below
General Office California Water Service Company
1720 North First Street
San Jose CA 95112
E mail address tsalzano calwater com
Phone 408 367 8340
Fax 408 367 8427
District Office California Water Service Company Bayshore District
341 North Delaware St
San Mateo CA 94401 1727
District Manager Anthony Carrasco
District Phone 650 558 7800
Printed 7 8 2011 Page 9
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
1 Plan Preparation
California Water Service Company Cal Water is an investor owned public utility
supplying water service to 1 7 million Californians through over 435 000 connections
Its 24 separate water systems serve over 63 communities from Chico in the north to the
Palos Verdes Peninsula in Southern California California Water Service Group
California Water Service Company s parent company is also serving communities in
Washington New Mexico and Hawaii Rates and operations for districts located in
California are regulated by the California Public Utilities Commission CPUC Rates
are set separately for each of the systems Cal Water incorporated in 1926 and has
provided water service to the South San Francisco community since 1931
1 1 Purpose
California Water Code 10644 a requires urban water suppliers to file with the
Department of Water Resources the California State Library and any city or county
within which the supplier provides water supplies a copy of its Urban Water
Management Plan UWMP no later than 30 days after adoption Cal Water will follow
the California Water Code and file an UWMP at least once every five years on or before
December 31 in years ending in five and zero
All urban water suppliers as defined in Section 10617 including wholesalers either
publicly or privately owned providing water for municipal purposes either directly or
indirectly to more than 3 000 customers or supplying more than 3 000 acre feet annually
are required to prepare an UWMP
This UWMP is a foundation document and source of information for a Water Supply
Assessment and a Written Verification of Water Supply An UWMP also serves as
6 A long range planning document for water supply
6 Source data for development of a regional water plan and
6 A source document for cities and counties as they prepare their General Plans
6 A key component to Integrated Regional Water Management Plans
Printed 7 8 2011 Page 11
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
1 2 Coordination
Cal Water completed a draft of the UWMP for the South San Francisco District on
April 1 2011 The draft was sent to the agencies listed in Table 1 2 1 for review and
comment Copies of the draft plan were available at the Cal Water Corporate Office in
San Jose and at the District office for public review and comment
Table 1 2 1 Coordination with Appropriate Agencies Table 1
Participated Was Was sent Not
Attended a notice
in Commented contacted a copy of involved
Agency public of
developing on the draft for the draft No
meetings intention
the plan assistance plan information
City of South
City of Daly
County 3 3 3
Public 3 3 3
Commission
Supply and 3 3 3 3
Conservation
California Water Service Company conducted a formal public meeting to present
information on its South San Francisco UWMP on May 18 2011 from 2 30 4 30 at the
following location
California Water Service Company
Bayshore District Customer Service Center
341 N Delaware Street
San Mateo CA 94401
Proof of the public meeting is presented in Appendix A Appendix A also contains the
6 Letters sent to and received from various agencies regarding this plan
6 Minutes of public meeting
6 Correspondence between Cal Water and participating agencies
Printed 7 8 2011 Page 12
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
1 3 Plan Adoption
The deadline for final comments was June 15 2011 The final plan was adopted by the
Vice President of Engineering Water Quality on June 24 2011 and was submitted to
California Department of Water Resources within 30 days of approval Appendix A
presents a copy of the signed Resolution of Plan Adoption A copy of the final version of
this report will be sent to the agencies listed in Table 1 2 1 and to the California State
1 4 Water Management Tools
Cal Water uses the following water management tools to optimize management of water
resources for the District
6 Computerized Hydraulic Model for analysis of various operating conditions
within the water distribution network and for planning operational and facility
improvements For smaller systems a simple model is maintained that only
models trunk lines key sources and major delivery points
6 Supervisory Control and Data Acquisition SCADA system that provides
information as to how the water system is operating provides operational control
functions and maintains a historical record of selected data
6 Revenue Management Solutions RMS is an information system that Cal Water
uses to maintain detailed historical records including the water sales and customer
service connections
6 District Report on Production DROP is a database that maintains water
production data for wells and purchased amounts from wholesale service
connections
6 Geographical Information Systems GIS that combines multiple sources of
information and allows data to be electronically mapped for analysis and
understanding of growth and constraints on land development and water use
6 Laboratory Information Management System LIMS provides water quality data
for detailed constituent analysis of raw and finished water determination of
compliance with state and federal drinking water standards and trends in water
quality changes
6 Water Supply and Facilities Master Plan for identification of near and long term
capital improvement projects for water system facilities and equipment using all
of the above tools and Cal Water experience in design and construction
6 Computerized Maintenance Management System CMMS is a computerized
database system that tracks asset data assigns and schedules maintenance work
orders and reports on maintenance related activities A CMMS allows a business
to manage maintenance work more effectively and is a stepping stone towards
Asset Management AM
6 Groundwater Level Monitoring Program tracks groundwater fluctuations over
time and is used to inform resource management and well maintenance decisions
Printed 7 8 2011 Page 13
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
1 5 BAWSCA Membership
Cal Water is a member of The Bay Area Water Supply and Conservation Agency
BAWSCA was created on May 27 2003 to represent the interests of the 26 agencies that
include cities water districts a water company and a university in Alameda Santa Clara
and San Mateo counties that purchase water on a wholesale basis from the San Francisco
Regional Water System RWS Collectively the BAWSCA agencies are referred to as
the Wholesale Customers
BAWSCA is the only entity that has the authority to directly represent the needs of the
wholesale customers that depend on the RWS Through BAWSCA the wholesale
customers can work with the San Francisco Public Utilities Commission SFPUC on an
equal basis to ensure the RWS is rehabilitated and maintained and to collectively and
efficiently meet local responsibilities
BAWSCA has the authority to coordinate water conservation supply and recycling
activities for its agencies acquire water and make it available to other agencies on a
wholesale basis finance projects including improvements to the regional water system
and build facilities jointly with other local public agencies or on its own to carry out the
agency s purposes
Compliance with the Urban Water Management Planning Act lies with each agency that
delivers water to its customers In this instance the responsibility for completing an
UWMP lies with the individual BAWSCA member agencies BAWSCA s role in the
development of the 2010 UWMP updates is to work closely with its member agencies
and the SFPUC to maintain consistency among the multiple documents being developed
1 6 Plan Organization
This plan is organized as described in the following outline The corresponding
provisions of the California Urban Water Management Planning Act are included as
references Tables in this plan have cross references to the tables as listed in the
Guidebook to Assist Water Suppliers to Prepare a 2010 Urban Water Management Plan
prepared by the California Department of Water Resources
Section Table 1 6 1 Plan Organization Act Provision
Contact Sheet List of Contact Persons
Plan Preparation
Section 1 This section describes the requirement and the purpose of the Urban Water
Management Planning Act coordination plan adoption schedule and
management tools
System Description
Section 2 This section describes the District service area and includes area information 10631 a
population estimate and climate description
Section 3 System Demands 10631
Printed 7 8 2011 Page 14
2010 Urban Water Management Plan
California Water Service Company
South San Francisco District
Section Table 1 6 1 Plan Organization Act Provision
This section describes the water supply projection methodology used to 10608 20 e
estimate water demands and supply requirements to 2040 It also includes a
discussion of SBx7 7 baselines and targets
System Supplies
Section 4 10633
This section includes a detailed discussion of the water supply sources
Water Supply Reliability and Water Shortage Contingency Planning
This section includes a discussion of the water supply reliability and describes
Section 5 10632
the District s planning for water shortages during drought and emergency
situations
Demand Management Measures
Section 6 10631
This section describes Cal Water s conservation programs
Climate Change
This section contains a discussion of climate change
DWR Checklist
This section includes the completed DWR UWMP Checklist
Resolution To Adopt The Urban Water Management Plan
This section includes the following
1 Resolution
Appendix A 10642
2 Letters to and comments from various agencies
3 Minutes from the public hearing
4 Correspondence with participating agencies
Service Area Map
Appendix B This appendix includes the service area map of the District as filed with the
Public Utilities Commission
Water Supply Demand And Projection Worksheets
Appendix C This section includes the spreadsheets used to estimate the water demand for
the District
DWR Groundwater Bulletin 118
Appendix D Sections from the Department of Water Resources Bulletin 118 are included as 10631 b 1 4
reference and provide details of the basin for the District
Tariff Rule 14 1 Water Conservation And Rationing Plan and Local Water
Appendix E Conservation Ordinances
This section contains the tariff rule and ordinances for reference
Water Efficient Landscape Guidelines
Appendix F This section contains the Guideline for Water Efficient Landscape that Cal
Water uses at its properties including renovations
Conservation Master Plan
Appendix G 10631 j
This section contains the District s Conservation Master Plan
Appendix H Groundwater Management Plan for the Westside Basin 10631 b 1 4
Printed 7 8 2011 Page 15


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