Final Report, 2010 Urban Water Management Plan - Culver City

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5.2.1 Surface Water QualityThe entire supply for Culver City is obtained from treated surface water supply imported fromthe Metropolitan through three active connections (WB No. 23, WB No. 24, and WB No. 34).This is the primary source of water distributed in the system. Metropolitan is responsible formeeting all drinking water standards as water leaves the surface water treatment plant and at allinter-connections with the Culver City System.5.2.2 Groundwater QualityThere are currently three wells in the system, two are inactive and one is on standby status dueto water quality issues. A treatment system is being considered for the well.Table 5-1 summarizes water quality concerns for the groundwater wells in the Culver CitySystem. All wells are currently on standby or are inactive due to water quality issues. Thefollowing discussion relates to contaminants with maximum containment levels (MCLs) that areeither existing or have been proposed by the U.S. Environmental Protection Agency (USEPA)and/or CDPH.Drinking water regulations pertaining to emerging contaminants of concern, such as chromium(VI), nitrosamines, and VOCs, and potential revisions to existing regulations are closelymonitored by GSWC’s Environmental Quality Department. The appropriate sampling and actionwill be taken on any affected water supply sources as monitoring requirements, new or revisedMCLs are promulgated by the USEPA or CDPH. It is anticipated that it will take approximately2 to 5 years from official adoption of a new or revised MCL to implement wellhead treatment oralternative approach for a source, including all steps from procuring CPUC funding approval toplanning, permitting, design, and construction. There is typically adequate time allotted fromregulatory approval to promulgation of a new drinking water standard to address localizedtreatment requirements; therefore no direct impacts to water supply reliability from future waterquality regulations are anticipated at this time.Table 5-1:Summary of AssessmentWellCurrentWellCapacity(gpm) (1)StatusWater qualityissue/concernExistingTreatmentRecommendationsSentney No. 8 700 Standby Fe/Mn, BTEX, TDS Dual media filter VOC/TDS reductionCharnock No. 9 800 Inactive Fe/Mn, Hardness,TDS, MTBEDual media filterFull treatmentCharnock No. 10 1,500 Inactive Fe/Mn, Hardness,TDS, MTBEDual media filterFull treatmentNote:1. Estimated annual average current well production capacity is provided; actual and design instantaneous pumpingcapacity may be greater for each well.Page 5-2Final Report, 2010 Urban Water Management Plan – Culver CityGolden State Water Companyg:\adminasst\jobs\2010\1070001.00_gswc-uwmp\09-reports\9.09-reports\2011-08\grp3\gswc_culvercity_2010_uwmp-final.doc
5.2.3 Distribution System Water QualityDistribution System water quality monitoring is performed for several water quality parameters inthe Culver City System, including general physical properties, presence of coliform bacteria, anddisinfectant and disinfection byproduct levels. Corrosivity of the water is monitored bymeasuring lead and copper levels at customers’ water taps. All monitoring parameters andlevels currently meet drinking water standards and it is expected that these standards willcontinue to be met in the future.The Culver City System utilizes an approved Sample Siting Plan for the collection, recording,and reporting of all bacteriological analyses. The Culver City System has also established across-connection control program to reduce the hazard associated with backflow and backsiphonage.These programs are required to comply with CDPH regulations on WaterworksStandards and Cross Connection Control.5.3 Projected Impacts of Water QualityTable 5-2 summarizes the projected impact on water supply due to water quality issues withwells in the Culver City System.Table 5-2:Summary of Projected Water Supply Changes Due to Water Quality IssuesProjected Change (ac-ft/yr)Water Source 2010 2015 2020 2025 2030 2035Sentney No. 8 0 0 0 0 0 0Charnock No. 9 0 0 0 0 0 0Charnock No. 10 0 0 0 0 0 0Note:Table format based on DWR Guidebook Table 30Final Report, 2010 Urban Water Management Plan – Culver City Page 5-3Golden State Water Companyg:\adminasst\jobs\2010\1070001.00_gswc-uwmp\09-reports\9.09-reports\2011-08\grp3\gswc_culvercity_2010_uwmp-final.doc
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Table of Contents (cont’d)Chapter
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Table of Contents (cont’d)List of
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Notice of AdoptionA meeting to soli
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Abbreviationsac-ftac-ft/yr or AFYAc
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O&MRHNARTPoperation and maintenance
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DefinitionsChapter 2, Part 2.6, Div
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Chapter 1: Plan Preparation1.1 Back
Page 21 and 22: ¯1%&'( 10%&'( 405MilesImage Source
Page 23 and 24: 1.4 Public Utility Commission 2010
Page 25 and 26: 1.6 Plan Adoption and SubmittalPubl
Page 27 and 28: Table 1-2:Summary of UWMP Chapters
Page 29 and 30: Chapter 2: System DescriptionChapte
Page 31 and 32: %&'(10405%&'(Path: Z:\Projects\GSWC
Page 33 and 34: 2.3 Population, Housing and Employm
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Page 37 and 38: As concluded from analysis of SCAG
Page 39 and 40: Table 2-3:Monthly Average Climate D
Page 41 and 42: Chapter 3: Water UseSection 10631(e
Page 43 and 44: System (NAICS) codes. Then, the sor
Page 45 and 46: Table 3-2:Base Period RangesBase Pa
Page 47 and 48: 3.2.2 Urban Water Use TargetsRetail
Page 49 and 50: 3.3 Projected Water UseGrowth proje
Page 51 and 52: The population-based water use proj
Page 53 and 54: 3.4 Sales to Other AgenciesThere ar
Page 55 and 56: Total Water Demand(ac-ft/yr)8,0007,
Page 57 and 58: GSWC will not deny or conditionally
Page 59 and 60: Chapter 4: Water SupplyA detailed e
Page 61 and 62: 4.2 Imported WaterWBMWD is a large
Page 63 and 64: Table 4-4:Future Water Supply Proje
Page 65 and 66: The WBMWD is also involved in resea
Page 67 and 68: disinfected, secondary effluent (ro
Page 69 and 70: Table 4-15:Comparison of Recycled W
Page 71: Chapter 5: Water QualitySection 106
Page 75 and 76: Chapter 6: Water Supply Reliability
Page 77 and 78: • 1999 Water Surplus and Drought
Page 79 and 80: 6.1.3 Factors Resulting in Inconsis
Page 81 and 82: Table 6-7:Projected Multiple-Dry Ye
Page 83 and 84: Chapter 7: Conservation Program and
Page 85 and 86: Table 7-1:CUWCC BMP and UWMP DMMs O
Page 87 and 88: • Use of potable water which resu
Page 89 and 90: evenue consisted of 62.8 percent of
Page 91 and 92: There are no direct estimates of wa
Page 93 and 94: amount of water used to wash a stan
Page 95 and 96: 7.4.1.6 Commercial, Industrial, and
Page 97 and 98: However, if the gpcd begins to incr
Page 99 and 100: Chapter 8: Water Shortage Contingen
Page 101 and 102: Stage III (20 - 35 percent shortage
Page 103 and 104: Possible CatastropheTable 8-3:Summa
Page 105 and 106: In addition to prohibitions, Rule N
Page 107 and 108: Table 8-10:Names of MeasuresObtain
Page 109 and 110: Chapter 9: ReferencesCalifornia Dep
Page 111: Appendix AUrban Water Management Pl
Page 114 and 115: on water management strategies and
Page 116 and 117: supplier will be reviewing the plan
Page 118 and 119: (J) Wholesale agency programs.(K) C
Page 120 and 121: determine that an urban water suppl
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sequence for the agency's water sup
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WATER CODESECTION 10640-1064510640.
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WATER CODESECTION 10650-1065610650.
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Appendix BPublic Hearing Notices, N
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June 8, 2011City of Culver CitySol
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Culver City Community Service Area
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No Meeting Minutes were taken since
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4CUWCC BMP RETAIL COVERAGE REPORT 2
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Agency: Golden State Water Company
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4CUWCC BMP RETAIL COVERAGE REPORT 2
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California Urban Water Conservation
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CUWCC BMP COVERAGE REPORT BMP 3 RES
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SOUTHERN CALIFORNIA WATER COMPANY R
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GOLDEN STATE WATER COMPANY Revised
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GOLDEN STATE WATER COMPANY Original
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Appendix EDMM Supporting Documents
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Appendix F(Not Applicable; Appendix
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Urban Water Management PlanCulver C
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Appendix HDocumentation of submitta
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September 1, 2011City of Los Angele
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September 1, 2011County of Los Ange
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Appendix JUrban Water Management Pl
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No. UWMP requirement a Calif. Water
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UWMPlocationPageNumber7.2 7-4a The
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Final Report, 2010 Urban Water Management Plan - Culver City

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