Final Report
2005 Urban Water Management Plan—Culver City
Region II Headquarters
1920 West Corporate Way
Anaheim, CA92801
December 2005
325 E. Hillcrest Drive Suite 125
Thousand Oaks, CA
91360-5828
1
Contents
Final Report
2005 Urban Water Management Plan—Culver City
1
Contents
Contents
ChapterPage
Notice of Adoption
Abbreviations
Definitions
Chapter 1. Introduction and Overview......
Background
System Overview
California Urban Water Conservation Council
Public Utility Commission Policy Changes
Agency Coordination
Public Participation and Plan Adoption
UWMP Preparation......
UWMP Implementation
Content of the UWMP
Resource Optimization
Chapter 2. Service Area
Area
Demographics
Population, Housing and Employment
SCAG Population Projection Development Methodology
Culver City CSA Population Projections
Climate
Chapter 3. Water Supply
Water Sources
Imported Water
Groundwater
Reliability of Supply
Reliability of Imported Water......
Metropolitan Integrated Resource Plan (IRP)
Metropolitan Water Surplus and Drought Management Plan (WSDM Plan)
Metropolitan Local Resource Investments
WBMWD’s Water Supply Programs
Culver City System’s Water Supply Reliability
Factors Resulting in Inconsistency of Supply
Transfers and Exchanges
Planned Water Supply Projects and Programs
Wholesale Agency Supply Data
Chapter 4. Water Use
Historical and Projected Water Use
Sales to Other Agencies
Other Water Uses and Unaccounted-for Water
Total Water Demand
Data Provided to Wholesale Agency
Chapter 5. Demand Management Measures
BMP Implementation Status
Cost Benefit Analysis
Recommended Conservation Program
Economic Considerations
Legal Considerations
Cost Share Partners
Chapter 6. Desalination
Chapter 7. Water Shortage Contingency Plan
Action Stages
Minimum Supply
Catastrophic Supply Interruption Plan
Prohibitions, Penalties, and Consumption Reduction Methods
Revenue Impacts of Reduced Sales
Water-Use Monitoring Procedures
Chapter 8. Recycled Water Plan
Coordination
Wastewater Quantity, Quality, and Current Uses
Potential and Projected Use
Optimization and Incentives for Recycled Water Use
Chapter 9. Water Quality
GSWC Measures for Water Quality Regulation Compliance
Current and Proposed Water Quality Regulations
Safe Drinking Water Act (SDWA)
Primacy
Total Coliform Rule (TCR)
TCR Potential Revisions and Distribution System Requirements
Surface Water Treatment Rules
The Surface Water Treatment Rule (SWTR)
Cryptosporidium Action Plan
Interim Enhanced Surface Water Treatment Rule
Long Term 1 Enhanced Surface Water Treatment Rule
Long Term 2 Enhanced Surface Water Treatment Rule
Disinfectant/Disinfection By-Product Rules
Total Trihalomethanes (TTHM) Rule
Disinfectant/Disinfection By-Product (D/DBP) Rule Stage 1
D/DBP Rule Stage 2
Volatile Organic, Synthetic Organic and Inorganic Chemical Rules
Volatile Organic Chemicals Rule
Phase II Synthetic Organic Chemicals and Inorganic Chemicals Rule
Phase V Synthetic Organic Chemicals and Inorganic Chemicals Rule
Groundwater Rule
Filter Backwash Rule
Lead and Copper Rule
Arsenic Rule
Radionuclide Rule
Radon Rule
Drinking Water Contaminant Candidate List
Water Quality Issues
Surface Water Quality
Groundwater Quality
Projected Impact of Water Quality
Distribution System Water Quality
Emerging Water Quality Issues
Chapter 10. Water Service Reliability
Normal Water Year Analysis
Single Dry-Year Analysis
Multiple Dry-Year Analysis
Chapter 11. References
Tables
Table 11 Coordination with Agencies
Table 12 Summary of UWMP Chapters and Corresponding Provisions of the California Water Code
Table 21.Culver City CSAHistorical and Projected Population
Table 22 Monthly Climate Data Summary for Culver City CSA
Table 31 Current and Planned Water Supplies for the Culver City System in ac-ft/yr
Table 32 Supply Reliability for the Culver City System for year 2030
Table 33 Basis of Water Year Data for Imported Water
Table 34 Factors Resulting in Inconsistency of Supply
Table 35 Transfer and Exchange Opportunities
Table 36 Future Water Supply Projects in ac-ft
Table 37 Existing and Planned Water Sources Available to the Culver City System as Identified by WBMWD
Table 38 Reliability of Wholesale Supply for Year 2030
Table 39 Factors Affecting Wholesale Supply
Table 41 Population-Based and Historical-Trend Projections of the Number of Metered Service Connections for the Culver City System
Table 42 Population-Based and Historical-Trend Projections of Water Deliveries for Service Connections forthe Culver City Systeminac-ft/yr
Table 43 Sales to Other Agencies in ac-ft/yr
Table 44 Additional Water Uses and Losses in ac-ft/yr
Table 45 Projected Water Sales, Unaccounted-for System Losses, and Total Water Demand (ac-ft/yr)
Table 46 Summary of Culver City System Data Provided to WBMWD in ac-ft/yr
Table51 Water Conservation Best Management Practices
Table 52 Summary of Water Conservation Activities (1)
Table 53 Summary of Best Management Practice Implementation
Table 54 Results of Economic Analysis for BMPs Currently Not Meeting Coverage Requirements
Table 55 Results of Economic Analysis for BMPs Currently Not Meeting Coverage Requirements
Table 61 Summary of Opportunities for Water Desalination
Table 71 Water Supply Shortage Stages and Conditions
Table 72 Three-Year Estimated Minimum Water Supply in ac-ft/yr
Table 73 Summary of Actions for Catastrophic Events
Table 74 Summary of Mandatory Prohibitions
Table 75 Summary of Penalties and Charges for Excessive Use
Table76 Summary of Consumption Reduction Methods
Table 77 Summary of Actions and Conditions that Impact Revenue
Table78 Summary of Actions and Conditions that Impact Expenditures
Table 79 Proposed Measures to Overcome Revenue Impacts
Table 710 Proposed Measures to Overcome Expenditure Impacts
Table 711 Water-Use Monitoring Mechanisms
Table 81 Role of Participating Agencies in the Development of the Recycled Water Plan
Table82 Estimates of Existing and Projected Wastewater Collection and Treatment in ac-ft/yr (mgd) for the Culver City System
Table83 Estimates of Existing and Projected Disposal of Wastewater In ac-ft/yr (mgd) for the Culver City System
Table 84 Existing Recycled Water Use
Table 85 Potential Future Recycled Water Uses in ac-ft/yr
Table 86 Projected Future Recycled Water Use in Service Area in ac-ft/yr
Table 87 Comparison of Recycled Water Uses—Year 2000 Projections versus 2005 Actual
Table 88 Methods to Encourage Recycled Water Use and the Resulting Projected Use in ac-ft/yr
Table 91 Status of Drinking Water Regulations
Table 92 Current Federal Drinking Water Standards
Table 93 Current State Secondary Drinking Water Regulations
Table 94 Bin Requirements Table (from Microbial/Disinfection Byproducts [M/DBP] Federal Advisory Committee Stage 2 M-DBP Agreement in Principle)
Table 95 Microbial Toolbox Components (from Microbial/Disinfection Byproducts [M/DBP] Federal Advisory Committee Stage 2 MDBP Agreement in Principle)
Table 96 Disinfection By-Product MCLs from Stage 1 of the D/DBP Rule
Table 97 Disinfectant MRDLs from Stage 1 of the D/DBP Rule
Table 98 Required Removal of TOC by Enhanced Coagulation, Step 1
Table 99 Target pH Values for Enhanced Coagulation, Step 2 Bench Testing
Table 910 Existing and Revised MCLs for Radionuclides
Table 911 Contaminant Candidate List (CCL)
Table 912 Summary of Assessment
Table 913 Summary of Projected Water Supply Changes Due to Water Quality Issues
Table 101 Projected Normal Water Year Supply
Table 102Summary of Projected Normal Water Year Demands
Table 103 Comparison of Projected Normal Year Supply and Demand
Table 104 Projected Single-Dry Year Water Supply
Table 105 Summary of Projected Single-Dry Year Demands
Table 106 Comparison of Projected Supply and Demand for Single Dry Year
Table 107 Projected Multiple-Dry Year Water Supply and Demand Assessment
Figures
Figure11. Culver City System Location Map.
Figure 21. Culver City Customer Service Area Map
Figure 22. Historical and Projected Population, Household and Employment Growth within the Culver City CSA.
Figure 23.Monthly Average Precipitation in the Culver City CSA based on 30 Years Historical Data
Figure 41. Historical and Projected Number of Metered Service Connections
Figure 42. Historical Water Use and Future Water Use Projections
Figure 43. Water Use by Customer Type
Appendixes
Appendix AUrban Water Management Planning Act
Appendix BPublic Hearing Notice and Meeting Minutes
Appendix CPublic Comments on the Draft UWMP
Appendix DEconomic Analysis of Selected DemandManagement Measures
Appendix ECouncil Annual Reports for DemandManagement Measures
Appendix FRule No. 14.1: Mandatory Water Conservation, Restrictions, and Rationing Program
Appendix GRate Schedule
Appendix HResponses to Public Comments
Appendix IGroundwaterBasin Water Rights Stipulation/Judgment
Appendix JSummary of Population Based on Census Data
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Notice of Adoption
Notice of Adoption
A meeting to solicit public comments on the 2005 Urban Water Management Plan for the Golden State Water Company Culver City System was held on November 16, 2005 at 7:00 pm in the Iksan Room of the Veterans Memorial Complex in Culver City, California. Notice of this meeting was published in accordance with Section 6066 of Government Code in The Daily Breeze on October 27, 2005 and on November 3, 2005.
Copies of the Urban Water Management Plan were made available to the public at the Golden State Water Company Culver City Customer Service Office in Culver City, California two weeks prior to the public hearing.
Comments, oral and written, if received and responses to comments are documented in Appendix H of this document.
Golden State Water Company hereby adopts the 2005 Urban Water Management Plan for the Culver City System.
Patrick Scanlon
Vice President, Customer Service
Region II
Golden State Water Company
December 31, 2005
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Chapter 1.
Introduction and Overview
Abbreviations
ABAGAssociation of Bay Area Governments
ac-ftacre-feet
ac-ft/yracre-feet per year
ActUrban Water Management Planning Act
AMCLalternative MCL
AWWAAmerican Water Works Association
BMPsbest management practices
CBOcommunity-based organization
CCLcontaminant candidate list
CCRsconsumer confidence reports
CDHSCalifornia Department of Health Services
cfscubic feet per second
CIMISCalifornia Irrigation Management Information System
CouncilCalifornia Urban Water Conservation Council
CPEcomprehensive performance evaluation
CPUCCalifornia Public Utilities Commission
CSAcustomer service area
CTconcentration time
CUWACalifornia Urban Water Agencies
CWSscommunity water systems
D/DBPdisinfectant/disinfection by-product
DMMdemand management measure
DOCdissolved organic carbon
DOFDepartment of Finance
DWR GuidebookGuidebook to Assist Water Suppliers in the Preparation of a 2005 Urban Water Management Plan
DWRDepartment of Water Resources (California)
ECenhanced coagulation
EPAEnvironmental Protection Agency
ERPemergency response plan
EToevapotranspiration
gpmU.S. gallons per minute
GSWCGolden State Water Company
GWRGroundwater Rule
HAA5haloacetic acids
IESWTRInterim Enhanced SurfaceWater Treatment Rule
IOCsinorganic contaminants
IRPIntegrated Resource Plan
LACSDSanitation Districts of Los AngelesCounty
LT1ESWTRLong Term 1 Enhanced SurfaceWater Treatment Rule
LT2ESWTRLong Term 2 Enhanced SurfaceWater Treatment Rule
MCLGsmaximum contaminant level goals
MCLsmaximum contaminant levels
MetropolitanMetropolitan Water District of Southern California
MGmillion gallons
MMMmultimedia mitigation
MOUmemorandum of understanding (regarding urban water conservation in California)
MRDLsmaximum residual disinfectant levels
mremmillirems
MTBEmethyl tertiary-butyl ether
MWDMunicipal Water District with reference to any of the member agencies of the Metropolitan Water District of Southern California
N/Anot available
NAICSNorth American Industry Classification System
NDMAN-nitrosodimethylamine
NPVnet present value
NTNCWSnon-transient non-community water systems
NTUnephelometric turbidity units
O&Moperation and maintenance
OEHHAOffice of Environmental Health Hazard Assessment
pCipicoCuries
ROreverse osmosis
SCAGSouthern California Association of Governments
SDWASafe Drinking Water Act
SMCLsecondary maximum contaminant level
SOCssynthetic organic contaminants
SUVAsource-water-specific ultraviolet absorbance
SWPState Water Project
SWTRSurface Water Treatment Rule
TCRTotal Coliform Rule
TDS total dissolved solids
TOCtotal organic carbon
TTHMsTotal Trihalomethanes Rule
UCMunregulated contaminants monitoring
ULFultra low flush
ULFTultra-low-flush-toilet
UWMPUrban Water Management Plan
VOCsvolatile organic compounds
WEWACWater Education Water Awareness Committee
WRCCWesternRegionalClimateCenter
WRPwater reclamation plant
WSDM PlanWater Surplus and Drought Management Plan
WYwater year
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Chapter 1.
Introduction and Overview
Definitions
Chapter 2, Part 2.6, Division 6 of the California Water Code provides definitions for the construction of the Urban Water Management Plans. Appendix A contains the full text of the Urban Water Management Planning Act.
CHAPTER 2. DEFINITIONS
Section 10611. Unless the context otherwise requires, the definitions of this chapter govern the construction of this part.
Section 10611.5. "Demand management" means those water conservation measures, programs, and incentives that prevent the waste of water and promote the reasonable and efficient use and reuse of available supplies.
Section 10612. "Customer" means a purchaser of water from a water supplier who uses the water for municipal purposes, including residential, commercial, governmental, and industrial uses.
Section 10613. "Efficient use" means those management measures that result in the most effective use of water so as to prevent its waste or unreasonable use or unreasonable method of use.
Section 10614. "Person" means any individual, firm, association, organization, partnership, business, trust, corporation, company, public agency, or any agency of such an entity.
Section 10615. "Plan" means an urban water management plan prepared pursuant to this part. A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. The components of the plan may vary according to an individual community or area's characteristics and its capabilities to efficiently use and conserve water. The plan shall address measures for residential, commercial, governmental, and industrial water demand management as set forth in Article 2 (commencing with Section 10630) of Chapter 3. In addition, a strategy and time schedule for implementation shall be included in the plan.
Section 10616. "Public agency" means any board, commission, county, city and county, city, regional agency, district, or other public entity.
Section 10616.5. "Recycled water" means the reclamation and reuse of wastewater for beneficial use.
Section 10617."Urban water supplier" means a supplier, 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 per feet of water annually. An urban water supplier includes a supplier or contractor for water, regardless of the basis of right, which distributes or sells for ultimate resale to customers. This part applies only to water supplied from public water systems subject to Chapter 4 (commencing with Section 116275) of Part 12 of Division 104 of the Health and Safety Code.
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Chapter 1.
Introduction and Overview
Chapter 1. Introduction and Overview
Background
The Urban Water Management Plan (UWMP) for the Golden State Water Company (GSWC) Culver City System is prepared in compliance with Division 6, Part 2.6, of the California Water Code, Sections10610 through 10657 as last amended by Senate Bill (SB) 318, the Urban Water Management Planning Act (Act). The original bill, requiring a UWMP, was initially enacted in 1983. SB 318, which became law in 2004, is the eighteenth amendment to the bill. Increased emphasis on drought contingency planning, water demand management, reclamation, and groundwater resources has been provided through the updates to the original bill.
Under the current law, urban water suppliers with more than 3,000 service connections or water use of more than 3,000 acre-feet per year (ac-ft/yr) are required to submit a UWMP every five years to the California Department of Water Resources (DWR). The reports must be submitted by December 31 of years ending in zero and five. Under the name Southern California Water Company, GSWC prepared an UWMP for the Culver City System in 1985, 1990, 1995, and 2000. The 2005 UWMP is an update to the 2000 plan.
The law, as it is now, states and declares the following:
Section 10610.2
(a)The Legislature finds and declares all of the following:
(1)The waters of the state are a limited and renewable resource subject to ever-increasing demands.
(2)The conservation and efficient use of urban water supplies are of statewide concern; however, the planning for that use and the implementation of those plans can best be accomplished at the local level.
(3)A long-term, reliable supply of water is essential to protect the productivity of California's businesses and economic climate.
(4)As part of its long-range planning activities, every urban water supplier should make every effort to ensure the appropriate level of reliability in its water service sufficient to meet the needs of its various categories of customers during normal, dry, and multiple dry water years.
(5)Public health issues have been raised over a number of contaminants that have been identified in certain local and imported water supplies.
(6)Implementing effective water management strategies, including groundwater storage projects and recycled water projects, may require specific water quality and salinity targets for meeting groundwater basins water quality objectives and promoting beneficial use of recycled water.
(7)Water quality regulations are becoming an increasingly important factor in water agencies' selection of raw water sources, treatment alternatives, and modifications to existing treatment facilities.
(8)Changes in drinking water quality standards may also impact the usefulness of water supplies and may ultimately impact supply reliability.
(9)The quality of source supplies can have a significant impact on water management strategies and supply reliability.
(b)This part is intended to provide assistance to water agencies in carrying out their long-term resource planning responsibilities to ensure adequate water supplies to meet existing and future demands for water.
Section 10610.4. The Legislature finds and declares that it is the policy of the state as follows:
(a)The management of urban water demands and efficient use of water shall be actively pursued to protect both the people of the state and their water resources.
(b)The management of urban water demands and efficient use of urban water supplies shall be a guiding criterion in public decisions.