Appendix I Water Supply Assessment

Transcription

1 Appendix I Water Supply Assessment

2 Water Supply Assessment (Senate Bill 610) TARGET SHOPPING CENTER PREPARED FOR: Vaughn Water Company PREPARED BY: Contact: Charlie Marr, P.E. March 19, 2009

3 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Table of Contents I. Introduction... 1 II. Purpose of Report... 1 III. Project Description... 4 IV. Identification of Public Water System... 6 V. Project Applicability... 7 VI. Schedule... 8 VII. Estimated Water Demand... 9 VIII. Urban Water Management Plan (UWMP) Review IX. Water Supply Entitlements, Water Rights or Service Contracts X. Groundwater Basin Description, PWS Pumping, and Sufficiency Analysis XI. Cumulative Water Supply Analysis XII. Primary Issue for Assessment Conclusion References List of Figures Figure 1 Regional Vicinity... 2 Figure 2 Project Site... 3 Figure 2A Preliminary Site Plan... 5 Figure 3 Proposed Water Service Projects List of Tables Table 1 Land Use... 4 Table 2A VWC Usage Factors... 9 Table 2B Project Demand Estimate Table 3 Proposed Groundwater Pumping Table 4 Water Shortage Contingency Plan Table 5 Past Groundwater Pumping Table 6 Cumulative Demand Calculation List of Appendices Appendix A Vaughn Water Company 2005 Urban Water Management Plan Appendix B Department of Water Resources Bulletin 118 San Joaquin Groundwater Basin Kern County Subbasin Appendix C Vaughn Water Company Groundwater Hydrographs Appendix D VWC letter (and Kern County Cumulative Water Supply Analysis) H:\pdata\ \Admin\reports\Final\TSC_WSA_TOC.doc Page i

4 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 I. Introduction The Target Shopping Center (Project) is a proposed commercial retail development planned at the northeast corner of Rosedale Highway (58) and Renfro Road within Kern County California and sphere of influence of the City of Bakersfield. The Project consists of 21.8 acres of land that is currently vacant and dedicated as General Commercial (GC) within the Bakersfield General Plan. The vicinity of the Project is shown in Figure 1. The Project location within the county is shown in Figure 2. II. Purpose of Report The purpose for this report is summarized in Water Code Section Law Water Code section requires a city or county that determines a project is subject to the California Environmental Quality Act to identify any public water system that may supply water for the project and to request those public water systems to prepare a specified water supply assessment, except as otherwise specified. The bill requires the assessment to include, among other information, an identification of existing water supply entitlements, water rights, or water service contracts relevant to the identified water supply for the proposed project and water received in prior years pursuant to those entitlements, rights, and contracts. The bill prescribes a timeframe within which a public water system is required to submit the assessment to the city or county and authorizes the city or county to seek a writ of mandamus to compel the public water system to comply with requirements relating to the submission of the assessment. The bill requires the public water system, or the city or county, as applicable, if that entity concludes that water supplies are, or will be, insufficient, to submit the plans for acquiring additional water supplies. The bill requires the city or county to include the water supply assessment and certain other information in any environmental document prepared for the project pursuant to the act. This report is prepared as a technical study in support of the Environmental Impact Report (EIR) for the Target Shopping Center pursuant to California Environmental Quality Act (CEQA) requirements. The EIR is an important element for the environmental analysis of the proposed Project. The EIR is required to include a Water Supply Assessment (WSA) under Senate Bill 610 for applicable development projects to verify water supply sources are, or will be, available to serve the project for the next 20 years. As determined in Section V, the Project is not applicable to the requirements of SB 610. However, the applicant has volunteered to prepare this WSA on behalf of the Vaughn Water Company, the proposed water purveyor, for voluntary disclosure of water supply impacts. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 1 of 20

5 KINGS COUNTY TULARE COUNTY Ducor California Hot Springs Delano TULARE COUNTY KERN COUNTY Woody Glenville 155 Alta Sierra McFarland Wasco Miracle Hot Springs Shafter Button Willow Dustin Acres Tupman 119 Project Site 58 Rosedale Bakersfield Old River Kern City Oildale Greenfield Edison May Fair Lamont 58 DiGiorgio 33 Valley Acres Arvin 223 Taft Maricopa 99 Tehachapi 166 SAN LUIS OPISPO COUNTY 5 Grapevine SANTA BARBARA COUNTY KERN COUNTY VENTURA COUNTY Lebec KERN COUNTY LOS ANGELES COUNTY Not to scale 1/12/09 JN MAS TARGET SHOPPING CENTER Regional Vicinity Figure 1

6 PANCINI ST WEGIS AVENUE WEGIS AVENUE HEATH ROAD RUDD AVENUE RUDD AVENUE JENKINS ROAD KERN COUNTY BAKERSFIELD NORIEGA ROAD SANTA FE WAY HAGEMAN ROAD ALLEN ROAD ALLEN ROAD WINFIELD AVE MOON RANCH BECKY AVE MEACHAM ROAD KERN COUNTY DOBBS AVE MAUSBACH AVENUE Project Site 58 ROSEDALE HIGHWAY RENFRO ROAD ROSEDALE CLARISSE STREET HENDERSON AVE PALM AVENUE STEPHANIE STREET BARTON LANE HEATH ROAD PALM AVENUE WESTDALE DRIVE BAKERSFIELD BRIMHALL ROAD BRIMHALL ROAD APPALOOSA AVENUE JOHNSON ROAD ROWLAND AVENUE KERN COUNTY BAKERSFIELD ' 1/12/09 JN MAS APPROXIMATE TARGET SHOPPING CENTER Project Site Figure 2

7 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 III. Project Description The Target Shopping Center is a proposed commercial development with various buildings designed for retail of products and services. Among the proposed tenants are retail, restaurant and commercial services. A summary of the proposed uses are shown in Table 1. Table 1 Land Use Building Size Land Use (sf) Retail A 12,675 Target B (retail) 145,436 Retail B2 25,060 Retail / DT C 8,100 D/T D 2,194 Restaurant E 5,100 Retail F 5,000 D/T G 2,806 D/T H 2,275 Walgreens I 14,820 Retail J 5,500 Total 228,966 Project Sf Zoning Designation Service Industrial The WSA evaluation is based on a total building area of approximately 229,000 square feet. The proposed site plan is shown to follow. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 4 of 20

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9 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 IV. Identification of Public Water System Law (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 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 in Section 10912, that may supply water for the project. If the city or county is not able to identify any public water system that may supply water for the project, the city or county shall prepare the water assessment required by this part after consulting with any entity serving domestic water supplies whose service area includes the project site, the local agency formation commission, and any public water system adjacent to the project site. Vaughn Water Company (VWC) is the proposed water purveyor for the Target Shopping Center. The VWC service area overlies both the Rosedale Rio Bravo Water Storage District (RRBWSD) and Kern County Water Agency s Improvement District No. 4 (ID4), both of which are wholesale water agencies supplying groundwater recharge and groundwater management for continuous and reliable supply to VWC, as well as other regional water retailers. The majority of undeveloped land in the Vaughn Water Company s service area is within the RRBWSD boundary. Vaughn Water Company serves primarily residential development within the unincorporated Rosedale region of Kern County and incorporated areas of west Bakersfield. VWC s water transmission and distribution system consists of: 12 groundwater extraction wells 3.4 million gallons of above-ground storage 11 booster pumping plant 8 water treatment plants 4 inter-connections with neighboring water systems H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 6 of 20

10 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 V. Project Applicability Law (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 of the Public Resources Code shall comply with this part For the purposes of this part, the following terms have the following meanings: (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. Although the Target Shopping Center project may not meet the qualifications for a project under SB based on the fact that it is less than the 500,000 square foot threshold, will include less than 1,000 employees, and will demand less water than the equivalent demand of 500 or more residential dwelling units - the applicant has requested a WSA be prepared and included as part of the CEQA process. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 7 of 20

11 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 VI. Schedule Law (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. (2) Prior to the expiration of the 90-day period, if the public water system intends to request an extension of time to prepare and adopt the assessment, the public water system shall meet with the city or county to request an extension of time, which shall not exceed 30 days, to prepare and adopt the assessment. (3) If the public water system fails to request an extension of time, or fails to submit the assessment notwithstanding the extension of time granted pursuant to paragraph (2), the city or county may seek a writ of mandamus to compel the governing body of the public water system to comply with the requirements of this part relating to the submission of the water supply assessment. There has been no formal request to date by Kern County or Vaughn Water Company to prepare this WSA. Although the Project does not meet the qualifications for a project under SB 610, based on the fact that it is less than the 500,000 square foot threshold, and will include less than 1,000 employees, the applicant has requested a WSA be prepared and included as part of the CEQA process. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 8 of 20

12 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 VII. Estimated Water Demand The projected water demand for the Target Shopping Center is based on the usage factors developed by the Vaughn Water Company in their 2005 Residential Water Use Study (Dee Jaspars & Associates, May 2, 2005). The Study investigated actual water demands using residential meter records for various lot sizes. The Study identified decreasing unit water usage (per acre) as residential lots increased in size. Table 2A identifies this inverse relationship from the Study: Table 2A VWC Usage Factors Lot Size (sf) Total Water Use (AF/Yr/Ac) Interior Water Use (AF/Yr/Ac) Exterior Water Use (AF/Yr/Ac)* 198, , , , , , , , , , , , , , , * Includes landscape irrigation and other outdoor uses. The VWC provided subsequent direction for estimating demands for other commercial development projects within unincorporated area of their service region in a September 2007 letter, as discussed in Section XI and Appendix D. The VWC desired to use the results of the Study for commercial projects by equating five residential lots to each commercial acre (43560/8712 = 5 DUs / comm acre). The commercial retail buildings proposed for the Target Shopping Center range from 2,000 square feet to 145,000 square feet. A hypothetical lot area for each commercial building of the Project was calculated based on the percentage of each building s area to total Project building area. The estimated annual demand of the Project is estimated at 44.4 acre-feet (AF), as shown in Table 2B. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 9 of 20

13 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Table 2B Project Water Demand Land Use Calculated Lot Area [1] Average Bldg Size Average Annual Water Demand [2] (AC) (SF) AF/Ac/Yr (AFY) Retail A , Target B (retail) , Retail B , Retail / DT C , D/T D , Restaurant E , Retail F , D/T G , D/T H , Walgreens I , Retail J , Total , Project AC SF AFY [1] Lot acreage is calculated using percentage of building size to Total Project building area. [2] Water demand is based on the factors from Vaughn Water Company s 2005 Residential Water Use Study (Table 5). The calculated Project water demand of 44.4 AFY is equivalent to annual water demand of approximately 14.5 million gallon per year, and average daily demand of 39,600 gallon per day. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 10 of 20

14 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 VIII. Urban Water Management Plan (UWMP) Review Law (c) (1) The city or county, at the time it makes the determination required under Section 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). (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). (3) If the projected water demand associated with the proposed project was not accounted for in the most recently adopted urban water management plan, or the public water system has no urban water management plan, the water supply assessment for the project shall include a discussion with regard to whether the public water system's total projected water supplies available 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 the public water system's existing and planned future uses, including agricultural and manufacturing uses. (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. VWC prepared their 2005 Urban Water Management Plan (UWMP) in accordance with Water Code describing the Company s past, present and future water supply to its customers. Vaughn Water Company works to ensure sufficient water supply is available by collaborative effort with the wholesale water suppliers. The VWC service area overlies both the Rosedale Rio Bravo Water Storage District and Kern County Water Agency s Improvement District No. 4 (ID4). The two wholesale water agencies work jointly to optimize groundwater storage and recovery capacity for the region. ID4 recharges imported water within the RRBWSD for future recovery by VWC and ID4 facilities. RRBWSD gets capacity entitlement from this operation in return for providing ID4 increased recharge capacity. The agencies also monitor water quality and groundwater levels. The majority of undeveloped land in the Vaughn Water Company s service area, including the Project site, is within the Rosedale Rio Bravo Storage District boundary. A population of approximately 27,000 was served domestic water by VWC in The VWC 2005 UWMP plans for a growth of 450 connections per year. Recent years have shown an increase in growth within the VWC service area, which is anticipated to continue. VWC recognizes the need for planning, designing and constructing infrastructure commensurate with this growth. Future development area demands within VWC, including the Target Shopping Center, are estimated at 8,900 AFY (new development between 2005 and 2025, Section VIII). H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 11 of 20

15 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Supply System The Vaughn Water Company supply system consists of groundwater wells and treatment plants, aboveground storage capacity of 3.4 million gallons, booster pumping facilities to pressurize the distribution system, and inter-connections with neighboring water systems operated by independent purveyors. Project Identified in UWMP The 21.8-acre site of the proposed Target Shopping Center is identified in Vaughn Water Company s 2005 UWMP as future developed land. VWC has observed growth in recent years of 450 to 600 new connections per year. Areas of growth will be served from new groundwater wells and construction of future storage and pumping facilities. Other Agencies In addition to the wholesale water agencies, Vaughn Water Company also works with the following retail water agencies to enhance water supply reliability throughout Kern County: California Water Services Company City of Bakersfield Department of Water Resources East Niles Community Services District North of the River Municipal Water District Oildale Mutual Water Company Future Water Supply Vaughn Water Company projects groundwater pumping for the next 20 years according to Table 3 (VWC UWMP Table 5). * Table 3 Proposed Groundwater Pumping* (AF) Year Annual Pumping 10,700 13,200 15,400 17,600 19,600 The KCWA ID4 was formed, in part, for the purpose of financing the Henry C. Garnett Water Purification Plant and pertinent conveyance facilities to bring imported water from the State Department of Water Resources (DWR) State Water Project (SWP) into the City of Bakersfield. ID4 s 82,594 acre-feet per year SWP water entitlement is used for direct treatment at the Plant and groundwater recharge in order to bring the groundwater basin into balance. The deliverable capacity of the SWP entitlement is subject to the reliability percentage recalculated periodically by DWR. The RRBWSD and Vaughn Water Company recognize the conversion of agricultural lands to residential and commercial uses effectively reduces the demand on the groundwater basin by approximately 50 percent. Therefore, projects that replace active agricultural operations assist in achieving the groundwater system balance. The RRBWSD imports SWP water for recharging the basin and administers cooperative programs with other water agencies for the express purpose of achieving groundwater balance (natural recharge plus artificial recharge equal to or greater than demand). According to Appendix 2 of the 2005 UWMP, the RRBWSD has allocation to 29,900 acre-feet per year of imported water from the SWP via the Kern County Water Agency and Improvement District No. 4. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 12 of 20

16 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Normal and Dry-Year Supply VWC meets its customer demands by extraction of groundwater. The groundwater basin serves as a reliable source of water. During normal conditions, groundwater levels will remain within historic levels due to the efforts of several Kern County agencies to recharge groundwater into the basin. During times of single or multiple dry year scenarios, the water level in the groundwater basin has historically lowered. VWC has responded to the lowering of the basin groundwater level by constructing pumps capable of lifting water from the additional depth. As efforts are made to regionally balance the groundwater basin, the need for additional pumping lift should be alleviated. To further plan for dry conditions, Vaughn Water Company has created a Water Shortage Contingency Plan (Appendix A) to establish public awareness programs and water supply reductions according to Table 4. Table 4 Water Shortage Contingency Plan Stage Reduction Goal Enforcement 1 15% Voluntary - w/ educational reminders. 2 15% - 30% Mandatory - cut use to 75% by normal metered uses. Distribution of water conservation devices. Water audits of large water users. 3 30% - 50% Mandatory - same as Stage 1 and 2 with addition of large water users being required to use to 50% of average water demand. Water audits used to enforce. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 13 of 20

17 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 IX. Water Supply Entitlements, Water Rights or Service Contracts Law (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 contracts. (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. Groundwater and SWP Water for Basin Recharge The Vaughn Water Company (VWC) meets 100 percent of its water demand through groundwater extracted from the San Joaquin Valley Basin/Kern County subbasin. The basin is not adjudicated. VWC extracts groundwater strictly to meet annual demands, and depends on Rosedale-Rio Bravo Water Storage District and KCWA ID4 to manage the groundwater basins. As a contracting agency of the DWR for State Water Project supply, KCWA provides its member units, including RRWSD, with imported water. Through agreement with ID4, the imported water is used for groundwater recharge at basins within the District on behalf of participating water purveyors in the region, such as the VWC. According to VWC s 2005 Urban Water Management Plan (Appendix 2), RRBWSD has 29,900 AF/Yr of water rights to ID4 s imported water entitlement. The UWMP identifies a 30-year average groundwater basin demand within ID4 of 85,000 acre-feet per year (AFY). Current (2005) treated surface water supplied to retailers is approximately 25,000 AFY. The total average gross demand, therefore, is 110,000 AFY, which does not consider return flows from irrigation and wastewater. The UWMP identifies 83,000 AFY of imported and surface water supply, which does not consider natural recharge from precipitation. According to the VWC 2005 UWMP, return flows due to irrigation can be conservatively estimated at 30 percent of total demand (would likely be much higher). Therefore, a conservatively estimated additional supply of 33,000 AFY (.30 x 110,000) should be added to 83,000 for a total supply of 116,000 AFY, providing the ability to maintain the groundwater basin in balance (116,000 AFY supply versus 110,000 AFY demand within ID4). Further providing groundwater basin balance is the natural precipitation of the region. Average rainfall of six inches per year over the 65,400 acres of ID4 would provide an additional 32,700 AFY of supply. Total supply for the users within ID4 includes existing development within the VWC service area. Surface Water Vaughn Water Company does not currently hold rights to surface water. Reclaimed Water Vaughn Water Company does not operate any sewerage treatment facilities to generate reclaimed water for use. Therefore, no reclaimed water use is currently planned within VWC service area. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 14 of 20

18 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 X. Groundwater Basin Description, PWS Pumping, and Sufficiency Analysis Law (f) If a water supply for a proposed project includes groundwater, the following additional information shall be included in the water supply assessment: (1) A review of any information contained in the urban water management plan relevant to the identified water supply for the proposed project. (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 court 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 the basin or basins to eliminate the long-term overdraft condition. (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 to 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, but not limited to, historic use records. (4) 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, historic use records. (5) 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 supply 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 addressed in the description and analysis required by paragraph (4) of subdivision (b) of Section Groundwater Basin Description The Vaughn Water Company service area overlies the Kern County subbasin of the San Joaquin Valley Groundwater Basin within the Tulare Lake Hydrologic Region. Bounding the subbasin are the Kern County line and Tulare Groundwater subbasin to the north, Sierra Nevada foothills and Tehachapi Mountains to the south and southeast, and the San Emigdio Mountains and Coast Ranges to the west. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 15 of 20

19 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 The groundwater basin is comprised of deposits of clay, silt, sand and gravel and consists of four water bearing formations: Olcese and Santa Margarita formation, Tulare and Kern River formation, Older Alluvium/Stream and Terrace deposits, and Younger Alluvium/Flood Basin deposits. The subbasin has a surface area of 3,040 square miles, and receives average precipitation of 5 to 13 inches annually. Appendix B provides detailed information on the Kern County Subbasin of the San Joaquin Valley Groundwater Basin. Groundwater Production The Vaughn Water Company produces 100 percent of its water supply from groundwater wells located throughout its service area. Through the efforts of Kern County Water Agency and Rosedale Rio Bravo Water Storage District, well pumping fees will be used for the recharging costs of the groundwater basin with surface water or imported water supplies. VWC groundwater production is summarized in Table 5. Table 5 Past Groundwater Pumping, AF Year Annual Pumping 9,027 9,434 9,929 10,195 10,777 Groundwater Level Trends Vaughn Water Company provided two groundwater depth charts in its 2005 UWMP to show historic groundwater level information. The charts are provided in Appendix C of this WSA. The Krause Well, located within the Rosedale Rio Bravo Storage District boundary, shows water levels (depth to water) ranging from 110 to 182 feet. The Company s Jewetta Well, located on the west boundary of Kern County Water Agency s ID4, shows level readings ranging from 95 to 165 feet. Groundwater Quality Vaughn Water Company operates under the jurisdiction of the State of California Department of Health Services (DHS). DHS has established water quality standards that Vaughn Water Company adheres to. In order to meet the standards, VWC, as necessary, utilizes treatment systems to remove any contaminants resulting from current and past use of agricultural pesticides. In the event a well exceeds the State of California s maximum contaminant level (MCL) for gross alpha, uranium or nitrate, the well would be immediately shutdown. Future Programs Rosedale Rio Bravo Water Storage District and Kern County Water Agency Improvement District No. 4 have entered into a Joint Use Groundwater Recovery Program. The program includes the construction of water well recovery capacity (up to 45 cubic feet per second) and transmission pipeline capacity in the Cross Valley Canal (up to 60 cubic feet per second). This program will significantly benefit the groundwater basin underlying the Rosedale Rio Bravo Storage District/Vaughn Water Company service boundary. State of the Basin The Kern County subbasin is not adjudicated or subject to a groundwater management plan. Vaughn Water Company recognizes that coordination and planning are crucial to ensuring that groundwater supplies are available for the future. Programs such as the Joint Use Groundwater Recovery Program are underway to regionally benefit the groundwater basin. Coordination with Kern County Water Agency, Improvement District No. 4, Rosedale Rio Bravo Water Storage District, City of Bakersfield and the California Water Service Company will enhance the sufficiency of the groundwater supply system to supply all Kern County water purveyors, including Vaughn Water Company. H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 16 of 20

20 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 XI. Cumulative Water Supply Analysis Vaughn Water Company has taken a cumulative approach to water supply planning. In the 2005 Urban Water Management Plan, growth was accounted for by projecting water demand in 5-year increments out to Annual increases in water supply requirements for the 20-year planning from 2005 to 2025 is projected to be between 400 and 500 AF per year (VWC 2005 UWMP, Table 13). The Kern County Planning Department is tracking several development projects, in various phases of planning, within the Vaughn Water Company service area (Figure 3). The water demand for the projects is estimated in Table 6. The calculation is based on the residential demand factors as determined by Dee Jaspar & Associates in the 2005 Residential Water Use Study and equivalent dwelling units for nonresidential development according to the City of Bakersfield s Standards and Specifications for Domestic Water Systems. RBF Consulting received direction from the Vaughn Water Company for estimating the water demand for the projects. The estimating method, which was adopted for the Target Shopping Center, is discussed in Section VII. The direction was provided in a VWC letter, which includes a memorandum from Dee Jaspars & Associates (September 24, 2007), and their water demand estimate for the projects in the Cumulative Water Supply Analysis. A copy of the letter is included in Appendix D. The projected completion dates of each project within the Cumulative Water Supply Analysis vary, and all projects may or may not be completed within the next 20 years. In addition, there may be more projects not yet conceived that may be completed within the next 20 years. For the purposes of the Target Shopping Center WSA, all the identified projects for the Cumulative Water Supply Analysis are assumed to be completed within the next 20-year planning horizon. The total estimated annual water demand of the projects is 4,662 AF (Table 6), which further assumes that all wastewater generated from the projects will be conveyed to a distant treatment facility and re-introduced outside VWC s groundwater system (will not benefit groundwater levels for pumping facilities within VWC s service area). The total water demand projected for all of the projects over 20 years calculates to an average annual demand growth of 233 AF. This demonstrates that the list is not complete (calculates to less than 400 to 500 AF/year ), or currently planned demand increase is within, and actually significantly less than, than the VWC 2005 UWMP projections. The additional Target Shopping Center annual demand of 44.4 AF calculates to a total pumping growth of less than 233 AF per year; therefore, the total anticipated future water demand is within current growth projections. As a verification of planning sufficiency, Table 3 (Section VIII) shows an increased pumping need between 2005 and 2025 of 8,900 AFY, which exceeds the annual pumping need for the projects in Table 6 plus the Rosedale Crossing Shopping Center and Target Shopping Center (4662 AF plus 39 AF plus 44 AF equals 4,745 AF). H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 17 of 20

21 Figure 3

22 TABLE 6 Vaughn Water Company Cumulative Demand Calculation Development Identification Land Use Gross Area Average Lot Size Unit Water Demand [1] Net Water Use Sewage Not Counted [1] Total Water Demand Net Water Use Sewage Not Counted (AC) (SF) (AF/Ac/Y) (AF/Y) (AF/Y) (AF/Y) Neighborhood Residential 78 16, Commercial 10 8, Total Bakersfield Land Development Residential 218 6, Residential 20 1, Total Hopkins Residential 58 17, Blackhawk Land Residential 70 13, Stonefield Development Residential 252 7, Commercial 10 8, Park 28.5 n/a School 15 n/a Total Beech Street Development Residential , Reina Ranch Residential 80 14, JFCA Ranch Residential 74 13, Bakersfield Investors Residential , Commercial 7 8, Park 10 n/a Total Northwest Land Residential 16 12, MMR BK Residential 66 17, Northwest Commercial Residential , Commercial 5 8, Total Unruh by Reynan Residential , Grand Totals 1,839 4,662 4,007 [1] Demand factors based on Table 5 of Vaughn Water Company's 2005 Residential Water Use Study. h:\pdata\ \water\wsa\cumulative demand calc xls

23 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 XII. Primary Issue for Assessment - Conclusion (1) The Vaughn Water Company has been identified as the public water supplier for the Project. (2) The Target Shopping Center is identified in the City of Bakersfield General Plan as General Commercial. The planned equivalent dwelling unit development rate of 450 equivalent dwelling units per year (Vaughn Water Company 2005 UWMP) exceeds the average absorption rate of the County-tracked projects within VWC plus the Target Shopping Center. (3) The calculated annual water demand for the Project is 44.4 AFY. (4) The increase in water demand for the Project is 0.5 percent of the projected total planned 20- year required production increase within the Vaughn Water Company service area between years 2005 and 2025 (8900 AF). (5) The Vaughn Water Company proposes to supply the Project from existing groundwater production and distribution facilities. (6) Vaughn Water Company continues to coordinate with Improvement District No. 4 of the Kern County Water Agency and Rosedale Rio Bravo Water Storage District to provide adequate groundwater supply to meet individual and cumulative development within their service area and demonstrate a shared responsibility to maintaining groundwater basin balance. Therefore, the Vaughn Water Company concludes that sufficient water supply exists within the groundwater basin under its current and planned recharge and extraction programs for the Target Shopping Center. References 1. California s Groundwater Bulletin 118 San Joaquin Valley Groundwater Basin Kern County Subbasin, January 20, Kern County Water Agency 2005 Urban Water Management Plan 3. City of Bakersfield 2005 Urban Water Management Plan 4. Vaughn Water Company 2005 Urban Water Management Plan 5. Summary: State Water Project Delivery Reliability Report, August City of Bakersfield Standards and Specifications for Domestic Water Systems, October 6, Residential Water Use Study, May 2, 2005 H:\pdata\ \Admin\reports\Final\TSC_WSA_ doc Page 20 of 20

24 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Appendix A Vaughn Water Company 2005 Urban Water Management Plan H:\pdata\ \Admin\reports\Final\TSC_WSA_AppCvrs.doc

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124 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Appendix B Department of Water Resources Bulletin 118 San Joaquin Groundwater Basin Kern County Subbasin H:\pdata\ \Admin\reports\Final\TSC_WSA_AppCvrs.doc

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132 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Appendix C Vaughn Water Company Groundwater Hydrographs H:\pdata\ \Admin\reports\Final\TSC_WSA_AppCvrs.doc

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135 Vaughn Water Company Water Supply Assessment Target Shopping Center March 2009 Appendix D Vaughn Water Company (September 2007) letter and Kern County Cumulative Water Supply Analysis H:\pdata\ \Admin\reports\Final\TSC_WSA_AppCvrs.doc

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