Appendix O-1. Water Supply Assessment for Paradise Valley Specific Plan Project, Brezack and Associates, July 14, 2017

Transcription

1 Water Services

2 Appendix O-1 Water Supply Assessment for Paradise Valley Specific Plan Project, Brezack and Associates, July 14, 2017

3 !"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6#! "#$%&!'())*+!,--%--.%/$!! 01&!2#&#34-%!5#**%+!')%64746!2*#/!2&18%6$!!"#$%&"'$()*+,-./()01"2*%,"0( ( 3+1.(45/(6748( 9%$:0%$'(2*%()*0;<$110(=011$.(>0-$%(?"&-%";-(!!!!!! 2&%)#&%3!9+!:&%;#6<!#/3!,--164#$%-!2*#//4/=! Coachella Valley Water District, Water Supply Assessment for Paradise Valley Specific Plan Project, Brezack & Associates Planning Paradise Valley WSA Revised _CVWD.06

4 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6#!"#$%&'(&)'*!%*!+& ES Executive Summary... 1! 1.0! Introduction ! 1.1! Background ! 1.2! Project Description ! 1.3! Regulatory Requirements And Reports ! 1.4! Document Purpose ! 1.5! Water delivery System And Water Supply ! 1.6! Existing Water Management Plans ! 1.7! Existing Agreements ! 1.8! Capital Outlay ! 1.9! Necessary Regulatory Approvals ! 2.0! Water Demands ! 2.1! Chapter Summary ! 2.2! Project Specific Water Demand ! 2.3! Water Conservation Measures ! 3.0! Water Supply Assessment ! 3.1! General ! 3.2! Identification of Water Source / Evaluation Of Groundwater Basin ! 3.3! Recycled WAter ! 4.0! Analysis of supply and demand ! 4.1! Conclusions ! 5.0! Water Supply Verification (WSV) ! 5.1! General ! 5.2! Water Source ! 5.3! Supporting Documentation ! 5.4! Factors of Capability ! 5.5! Impacts to Other Projects ! 5.6! Rights to Groundwater ! 5.7! Verification !!"#$%&'()% % *%

5 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 6.0! References: !!"#$%&'()% % **

6 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# $,+!&'(&!"#$%+& Table 1-1: Paradise Valley Proposed Land Uses by Zoning (Type) ! Table 1-2: Water Shortage Contingency Plan ! Table 2-1: Interior Water Demand Factors ! Table 2-2: Residential Interior Water Demand ! Table 2-3: Non-Residential Interior Water Demand ! Table 2-4: MAWA Calculation Table ! Table 2-5: Recycled Water Schedule of Availability ! Table 2-6: Project Water Demand Summary Table 4-1: Project Water Supply and Demand Summary for Project during Normal Years Table 4-2: Project Water Supply and Demand Summary for Project during Single Dry Year Table 4-3: Project Water Supply and Demand Summary for Project during Multiple Dry Years Table 5-1: Water Shortage Contingency Plan !!"#$%&'()% % ***

7 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# $,+!&'(&(,-./%+ Figure 1-1: Proposed Project Location ! Figure 1-2: Proposed Project Local Vicinity Map ! Figure 1-3: Land Use Plan (Paradise Valley Specific Plan) ! Figure 1-4: Proposed Water Distribution Infrastructure ! Figure 1-5: Water Supply Systems Schematic Figure 2-1: CVWD ETo Map With Comparison Site and Project Site Figure 3-1 Shavers Valley Groundwater Basin ! "00%*1,)%+& Appendix A: Legal Agreements (pertinent excerpts) RRB-GLC Water Supply Agreement RRB-GLC Water Supply Agreement First Amendment CVWD-GLC Annexation Agreement CVWD-GLC Assignment Agreement CVWD-GLC Project Services Agreement 1 Desert, California, !"#$%&'()% % *+

8 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Acronyms and Abbreviations AB AF AFD AFY CEQA CRA CRW CVWD CVWMP CWC DWA DWR EIR ET GLC GMP gpcd gpd gpd/sqr-ft KCWA LAFCO MAF MAWA MWD NCDC OVGB PF PWS RRB SB SVGSB SWP TDS UWMP WSA Assembly Bill Acre-Feet Acre-Feet per Day Acre-Feet per Year California Environmental Quality Act Colorado River Aqueduct Colorado River Water Coachella Valley Water District Coachella Valley Water Management Plan California Water Code Desert Water Agency Department of Water Resources Environmental Impact Report Evapotranspiration GLC Enterprises, LLC Groundwater Management Plan Gallons per Capita per Day Gallons per Day Gallons per Day per Square-Foot Kern County Water Agency Local Agency Formation Commission Million Acre-Feet Maximum Applied Water Allowance Metropolitan Water District National Climatic Data Center Orocopia Valley Groundwater Basin Plant Factors or Public Facilities (as context permits) Public Water System Rosedale-Rio Bravo Water Storage District Senate Bill Shavers Valley Groundwater Sub-basin State Water Project Total Dissolved Solids Urban Water Management Plan Water Supply Assessment!"#$%&'()% % +

9 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# ES EXECUTIVE SUMMARY This Water Supply Assessment (WSA) and Water Supply Verification (WSV) has been prepared for the Paradise Valley Specific Plan Project located in unincorporated Riverside County within the eastern Coachella Valley region. The proposed Project site is located approximately six miles west of the southern entrance to Joshua Tree National Park, as depicted in the location map presented in Figure 1-1. The proposed Project would be developed by the Glorious Land Company (GLC). The proposed Project would be developed on a footprint of approximately 1,848 acres, and contemplates a variety of land uses, including 8,490 residential dwelling units, 441,687 square-feet of retail uses, 450,323 square-feet of commercial office space, and approximately 3,100 contiguous acres of conserved natural open space. The proposed Project is anticipated to employ over 4,700 persons. The proposed Project would have a total water demand of 3,588 acre feet per year (AFY). Of that amount, 1,438 AFY would be met by recycled water generated by the proposed Project. Therefore, total water demand for the Project, net of recycled water, would be 2,150 AFY, of which 2,066 AFY would be potable water demand and 84 AFY would be untreated groundwater demand. The proposed Project would. demands would be separate from and independent of the water supply and demand of the proposed Project. The primary domestic water supply for the proposed Project would be groundwater produced from the Shavers Valley Groundwater Sub-basin (SVGSB). There has been no significant historical, and there is no current, water extraction from the SVGSB. The SVGSB is fully charged, and is estimated to contain approximately 2,618,000 acre feet of existing groundwater in storage, approximately 510,000 acre feet of which is located beneath the boundaries of the proposed Project (Dudek, Paradise Valley Groundwater Study, March 2016) 2. Groundwater modeling estimates that there is approximately 1,665,000 acre-feet of available water storage space in the SVGSB, of which 174,000 acre-feet underlies the proposed Project. Groundwater produced from the SVGSB for use by the proposed Project would be replenished by Colorado River Water (CRW). In order to provide water for groundwater replenishment, in 2005, GLC entered into a Water Supply Agreement with RRB, under which RRB is obligated to deliver to CVWD, over a 30 year period, a minimum of 9,500 AFY and a maximum of up to 16,500 AFY of water. This water will be delivered to MWD via the California Aqueduct. Pursuant to exchange agreements between MWD and CVWD, MWD will accept delivery of the RRB water via the California Aqueduct and will, as available, deliver a like amount of CRW to either CVWD or the SGVSB via the Colorado River Aqueduct. The RRB Water Supply Agreement provides for total water deliveries of approximately 262,000 acre feet of water over the period from 2010 to 2 ffices located at Hovley Lane East, Palm Desert, California, !"#$%&'()%,-.(%

10 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# GLC has assigned the RRB Water Supply Agreement to CVWD. CVWD will store delivered water in the Whitewater River Subbasin along with its existing Colorado River Aqueduct Deliveries until such time as the water is needed in the SGVSB. As of December 2016, RRB has delivered 57,500 acre-feet of RRB water to MWD under the terms and conditions of the RRB Water Supply Agreement. MWD has in turn delivered a like amount of CRW -basin storage area, and has been stored for the proposed Project. This stored water alone constitutes a 26-year supply for the replenishment of produced groundwater at the Project site, assuming full buildout of the proposed Project. The remaining 203,498 acre feet of water to be provided under the RRB Water Supply Agreement would be delivered to CVWD for groundwater replenishment, primarily during wet periods, as and when water is available to RRB and MWD. This remaining water on account would be adequate to replenish groundwater extracted for Project demand, at full buildout, for an additional 92 years. The SVGSB is not in overdraft, nor is it projected to become overdrafted (Department of Water Groundwater, Bulletin No. 118 Update). Hydrologic testing and evaluation indicates that the SVGSB is capable of producing groundwater in quantities which are sufficient to meet the demands of the proposed Project. In addition, testing and evaluation indicates that the SVGSB will accommodate the water recharge, storage and recovery which is necessary to provide a sustainable water supply for the proposed Project. A CVWD during normal, single dry and multiple dry years during a 20-year projection will meet the agricultural and manufacturing uses. The available groundwater in the SVGSB and the supply for replenishment of extracted water provided by the RRB Water Supply Agreement, would provide CVWD with sufficient water supplies to meet the water demand associated with the proposed Project during normal, single dry and multiple dry water years during a 20-year projection. The water supply for the proposed Project would be self sustaining and would have no impact on existing and future supplies. Therefore, based upon the information and analysis set forth in this WSA, the total projected water supplies available to 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. Senate Bill 610 (SB-610), established the requirements for the preparation of a WSA SB610 was enacted in 2001 and became effective January 1, It amended Section of the Public Resources Code. SB-610 amended Sections 10631, 10656, 10910, 10911, 10912, and 10915, repealed Section 10913, and added and amended Section of the California Water Code. It requires cities and counties to request specific information on water supplies from the Public Water System (PWS) that would serve any project that is subject to CEQA and is defined as a "project" in Water Code Section This information is to be incorporated into the environmental review documents prepared pursuant to CEQA. Senate Bill 221 (SB221) was enacted in 2001 and became effective as of January 1, SB221 amends Section of the Business and Professional Code, and amends Section to add Sections , and to the Government Code. SB221 establishes the relationship!"#$%&'()%,-.&%

11 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# between the WSA prepared for a subdivision and the project approval under the Subdivision Map Act. Pursuant to California Government Code Section , the PWS must provide a written verification of sufficient water supply prior to the approval of a new subdivision. A Water Supply Verification (WSV) is required prior to the approval of a tentative subdivision map, or a parcel map for which a tentative map was not required, or a development agreement for a subdivision of property of more than 500 dwelling units, except as specified, including the design of the subdivision or similar type of improvement. The purpose of the WSV is to provide the legislative body of a city, county or the designated advisory agency with written verification from the applicable public water purveyor that a sufficient water supply is available or, in addition, a specified finding is made by the local agency that sufficient water supplies are, or will be, available prior to completion of the subdivision. Therefore, a WSV is required by law since the Paradise Valley SP has over 500 housing units and is a Subdivision" as defined by Government Code Section !"#$%&'()%,-./

12 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 1.0 INTRODUCTION 1.1 BACKGROUND The environmental review of the proposed Project is being prepared in compliance with California Environmental Quality Act (CEQA) (commencing with Section of the California Public Resources Code). Riverside County is the Lead Agency for the planning and environmental review of the proposed Project and has elected to prepare a Programmatic Environmental Impact Report (EIR) in compliance with CEQA and the CEQA Guidelines (California Code of Regulations Title et seq.). Pursuant to CWC 10910(b), Riverside County has identified the Coachella Valley Water District (CVWD) as the public water system that will supply water for the proposed Project. proposed Project in accordance with CWC 10910, et seq. 1.2 PROJECT DESCRIPTION Location 89:9898 ;$<41/"*&'$##4/<& The proposed Project site is located in the western portion of Shavers Valley, in an unincorporated portion of Riverside County. The proposed Project site location map is presented in Figure 1-1. Shavers Valley is bounded by the Cottonwood Mountains to the north, the Mecca Hills to the southwest, and the Orocopia Mountains to the southeast. Approximately 25% of the proposed Project is north of I-10, while the remaining 75% is south of the interstate. Chiriaco Summit separates Shavers Valley from Hayfield Valley to the east. (Danielian, 2015). The proposed Project site is accessed from the Frontage Road off-ramp of I-10. The site is located approximately six miles west of the southern entrance to Joshua Tree National Park. The local vicinity map for the proposed Project is presented in Figure 1-2. Existing land uses within the proposed Project site include right-of-way easements for energy infrastructure including high-voltage electrical transmission lines, local electrical distribution lines, fiber optic communication lines, high-pressure natural gas pipelines and pump station facilities. There is an existing water well and water conveyance easements within the proposed Project site.!"#$%&'()% % (.(

13 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 1-1: Proposed Project Location!"#$%&'()% % (.&

14 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 1-2: Proposed Project Local Vicinity Map!"#$%&'()% % (./

15 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Specific Plan Overview The Paradise Valley Specific Plan will be considered for approval by Riverside County. The Paradise Valley Specific Plan would establish the necessary plans, development standards, regulations, infrastructure requirements, design guidelines, and implementation programs on which subsequent Project-related development activities would be founded. The Paradise Valley Specific Plan Project proposes 8,490 residential dwelling units, retail, office, and light industrial uses on a developed footprint of approximately 1,848 acres with 3,100 acres of natural space Land Use Plan The proposed Project will have a diversity of land uses, including residential, retail, commercialbusiness parks, light industrial, various recreational open spaces, schools, a medical center, and institutional and civic uses. The proposed land use plan is presented on Figure 1-3. Within the proposed Project, residential land uses will occupy 1,430 acres. The proposed Project will provide a wide variety of housing types including apartments, senior, family, second home, and retirement residences. A total of 8,490 residential dwelling units are planned. In addition, there will be approximately 119 acres of roads, and 146 acres of residential trails and parks. Eighty-four acres of public facilities will consist of schools and utility infrastructure consisting of an electrical substation, water and wastewater treatment facilities. Mixed-use areas comprised of both residential and commercial use are to be developed on approximately 177 acres. Approximately 23 acres of commercial space are planned for the proposed Project. A summary of land uses for the proposed Project is presented in Table 1-1.!"#$%&'()% % (.0%

16 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 1-3: Land Use Plan (Paradise Valley Specific Plan)!"#$%&'() (.1

17 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 1-1: Paradise Valley Proposed Land Uses by Zoning (Type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enate Bill 610 (SB 610) California Water Code (CWC) section et seq., commonly referred to as Senate Bill 610 (SB 610), requires the preparation of a Water Supply Assessment (WSA) for certain new development projects. (See CWC 10910(a), ) As stated in SB 610, the purpose of a WSA is to determine whether the dry water years during a 20-year projection will meet the projected water demand associated with the proposed Project, in addition to the PWS (See CWC 10910(c)(3).) The proposed Project is subject to the CEQA process, and a WSA is required for the proposed Project Senate Bill 221 (SB 221) Senate Bill 221 (SB 221) was enacted in 2001 and became effective as of January 1, SB 221 amends Section of the Business and Professional Code, and amends Section to add Section and to the Government Code. SB221 establishes the relationship between the WSA prepared for a project and the project approval under the Subdivision Map Act. Pursuant to!"#$%&'()% % % (.2

18 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# California Government Code Section , the PWS must provide a written verification of sufficient water supply prior to the approval of a new subdivision Urban Water Management Planning Act The Urban Water Management Planning Act, CWC section et seq., requires urban water suppliers in California providing water for municipal purposes directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually to prepare and adopt an Urban Water Management Plan (UWMP) at least once every five years, in years ending in zero and five. Among other things, the UWMP evaluates current and future water supplies and demands within a during normal, single-dry, and multiple-dry year periods over the next 20-year planning horizon and beyond, water supply reliability, water conservation measures, and water shortage contingency planning. CVWD has prepared and adopted its 2015 Urban Water Management Plan Update dated July 1, 2016 which has been approved by the DWR. The Paradise Valley Specific Plan Project is addres Groundwater Management Plan Act and Sustainable Groundwater Management Act CWC section et seq., commonly referred to as Assembly Bill 3030 (AB 3030), was enacted in 1992 and allowed certain existing local agencies to develop a groundwater management plan in groundwater basins defined in DWR Bulletin 118. Among other things, a groundwater management plan typically defines groundwater basin yield, basin storage space, transmission capability, water in storage, basin management objectives, and planned uses of groundwater. The purpose of the groundwater management plan is to avoid conditions that would adversely affect groundwater availability and/or quality within the plan area and to address data collection to protect and enable reasonable use of groundwater resources. CVWD has prepared and adopted its 2010 Coachella Valley Water Management Plan (CVWMP). The CVWMP was adopted in 2002, updated and adopted in 2010 as the 2010 CVWMP Update, and updated again in 2014 and The 2014 Sustainable Groundwater Management Act (SGMA) provides a framework for sustainable management of groundwater resources by local authorities. SGMA requires the formation of local groundwater sustainability agencies (GSAs) that must prepare and adopt groundwater sustainability plans (GSPs) for all groundwater basins designated by the Department of Water Resources (DWR) as medium or high priority. SGMA requires GSAs to achieve local groundwater sustainability within 20 years of adopting their GSPs. must have a GSP in place by the year All other medium and high priority basins must have a GSP in place by CVWD is a Groundwater Sustainability Agency for the Mission Creek and Indio Subbasins, and in December 2016, submitted the CVWMP, and the Mission Creek Garnet Hill WMP to DWR as an Alternative Groundwater Management Plans for these two medium priority subbasins State Water Recycling Law and Policy Water Code sections through provide, among other things, that recycled water should be used for non-potable uses such as cemeteries, golf courses, parks, highway landscaped areas, and industrial and irrigation uses if suitable recycled water is available for such uses according to certain statutory standards.!"#$%&'()% % % (.)

19 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Water Code sections provide among other things, additional recycled water requirements specific to CVWD, such that recycled water should be used for cemeteries, parks, highway landscaped areas, new industrial facilities, landscaped common areas of residential developments maintained by a homeowner's association, and golf course irrigation if available under the following conditions after notice to any user that may be ordered to use non-potable water or to cease using potable water: The CVWD Board determines that the source of non-potable water (including recycled water) is of adequate quality for the proposed use and is available for that use The CVWD Board determines that the non-potable water may be furnished for the proposed use at a reasonable cost to the user The State Division of Drinking Water determines that the use of non-potable water from the proposed source will not be detrimental to public health The Regional Water Quality Control Board determines that the use of nonpotable water from the proposed source will comply with an applicable water quality control plan The CVWD Board determines that the use of nonpotable water for the proposed use will not adversely affect groundwater rights or quality, and will not harm plant or wildlife Water Conservation Act of 2009 (SBX7-7) The Water Conservation Act of 2009, also referred to as SBX7-7 and as the 20 by 2020 act, was enacted in November Among other things, SB X7-7 established the goal of achieving a 20% reduction in statewide urban per capita water use by 2020 and the interim goal of achieving a 10% reduction by In an effort to achieve these goals, SB X7- ion such as existing baseline urban water consumption and to establish future water use reduction targets in gallons per capita per day (GPCD). These new reporting requirements began with the 2010 UWMPs and are updated in the 2015 UWMPs. In accordance with 591 GPCD, a 2015 interim target of 532 GPCD and a 2020 target of 473 GPCD Water Conservation in Landscaping Act (California Government Code Section et seq.) The Water Conservation in Landscaping Act, commonly referred to as Assembly Bill 1881 (AB 1881), was enacted in 2006 and requires local agencies to adopt the updated Model Ordinance or an equivalent local landscape ordinance that is as effective as the updated Model Ordinance for specified landscape applications. The state recently updated its model landscape ordinance and in accordance with the CVWD has adopted Landscape Ordinance to address effective water efficient landscape requirements for newly installed or rehabilitated landscapes Riverside County Water Efficient Landscape Requirements Ordinance The County of Riverside Ordinance No , Water Efficient Landscape Requirements Ordinance, establishes provisions for water management practices and water waste prevention for new and rehabilitated landscapes and to implement the requirements of the California Water Conservation in Landscaping Act 2006 and the California Code of Regulations Title 23, Division 2, Chapter 2.7. County Ordinance No , among other provisions, prohibits the use of natural turf grass in front turf to be irrigated using subsurface drip systems. The proposed Project will follow the CVWD Ordinance ordinance that is more stringent than the County of Riverside Ordinance.!"#$%&'()% % % (.3

20 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# The County also incorporates CVWD's water management planning efforts in its General Plan Updates Water Shortage Contingency CVWD originally developed its Water Shortage Contingency Plan during the drought pursuant to the requirements of Water Code section Today, CVWD's updated Water Shortage Contingency Plan is implemented pursuant to an ordinance with phased water use restrictions and a drought rate structure. The Water Shortage Contingency Plan provides the stages and action levels similar to those shown in Table 1-2, Water Shortage Contingency Plan 2015 UWMP Update. The trigger levels (to move from one stage to the next) depend on factors such as statewide, regional, and local water supply and demand conditions. Prior to the implementation of each mandatory action level, CVWD will hold a public hearing for the purpose of determining whether a shortage exists and which measures should be implemented. The public will receive prior notice of the public hearing and will have the opportunity to provide input on CVWD proposed course of action. The proposed Project will follow the CVWD water contingency ordinance in effect at the time of development. Table 1-2: Water Shortage Contingency Plan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alifornia Drought On January 17, 2014, Governor Jerry Brown issued a Drought Declaration and requested a voluntary 20% reduction in urban water use statewide. He also directed the State Water Resources Control Board (SWRCB) to adopt emergency water conservation regulations conditions. As a result, on July 15, 2014, the SWRCB adopted emergency regulations for statewide urban water conservation. These became effective on July 28, 2014 and were documented in Title 23, Sections , of the California Code of Regulations. Among other things, the emergency regulations prohibited applying water to outdoor landscapes in a manner that causes runoff such that water flows onto adjacent property, non-irrigated areas, private and public walkways, roadways, parking lots, or structures; using a hose to wash an automobile except where the hose is equipped with!"#$%&'()% % % (.4

21 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# a shutoff nozzle; applying water to any hard surface including, but not limited to, driveways, sidewalks, and asphalt; and using potable water in a fountain or other decorative water feature, except where the water is part of a recirculating system. Executive Order B was signed by California Governor Jerry Brown in April 2015 to direct statewide mandatory water reductions. Directives from the Executive Order include restrictions on water use to achieve a 25% reduction in potable urban water usage throughout the State, prohibitions on irrigation with potable water in new homes and developments unless water-efficient drip irrigation systems are used, initiatives for turf replacement, and other water management planning and reporting requirements. Agencies assigned to Tier 9, including CVWD, having residential water use above 215 GPCD, were required to reduce water use by 36 percent compared to its 2013 water use. This reduction was reduced to 32 percent in February As a result, agencies across the State have made significant cuts to water uses. Executive Order B was signed by California Governor Jerry Brown in November 2015 to call the Executive Order include on-going restrictions on water use to achieve a 25% reduction in potable urban water usage throughout the state, prioritization of groundwater recharge projects, and prioritization of funds to the SWRCB for small water systems. On May 9, 2016, Governor Brown issued Executive Order B that is focused on long-term water use efficiency. In response to that order, the SWRCB adopted revised emergency regulations on May 18, 2016 that transition the mandates away from demand-based regulations. Under the new regulations, individual districts will self-certify the level of available water supplies assuming three additional dry years and the level of conservation necessary to assure adequate supply over that time. It is anticipated that the new self-certification process will result in a reduction in the emergency mandatory reduction target imposed on CVWD by the SWRCB. contingency plan through a series of ordinances with phased water use restrictions and a drought penalty rate structure: Ordinance 1414 Stage 2 10% Mandatory Reduction; Ordinance 1419 Stage 3 36% Mandatory Reduction; Ordinance 1422 Stage 3 Adopt Additional Watering Restrictions; 36% Mandatory Reduction Ordinance 1426 Stage 3 Replace Previous Ordinances, 32% Mandatory Reduction and adopted Ordinance which establishes the following Stage 2 restrictions that remains in effect until the SWRCB rescinds its emergency regulations: Outdoor irrigation is limited to between 10:00 a.m. and sunset. Customers should follow the CVWD drought watering guide which reduces irrigation demand 20%. Broken sprinklers should be repaired within 24 hours of notice. Water should be served in restaurants only upon request. Hotels should maintain messaging in hotel rooms asking guests to conserve water.!"#$%&'()% % % (.('

22 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# In April 2017 Governor Jerry Brown lifted the drought emergency, and restrictions are not in effect at this time. 1.4 DOCUMENT PURPOSE A Water Supply Assessment (WSA) is required for all new projects that are subject to environmental review under the California Environmental Quality Act (CEQA). At the time the CEQA lead agency determines the project is subject to CEQA review, the lead agency must identify the PWS that will supply water for the project and request that agency to prepare a WSA. As required by SB 610, this WSA will be incorporated in the Programmatic EIR to be prepared for the proposed Project. This WSA provides an evaluation of water demand and supplies for the proposed Project pursuant to the requirements of SB 610 (Water Code ). As set forth in greater detail below, this WSA evaluates whether the total projected water supplies available to CVWD 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 Water Supply Assessment As noted above, SB 610 establishes the primary legal standards for assessing the sufficiency of water supplies for certain new development projects. the following: Proposed residential development of more than 500 dwelling units Proposed shopping center or business establishment employing more than 1,000 persons or having more than 500,000 square feet of floor space Proposed commercial office building employing more than 1,000 persons or having more than 250,000 square feet of floor space Proposed hotel or motel, or both, having more than 500 rooms 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 Proposed mixed-use project that includes one or more of the above components Proposed project that would demand an amount of water equivalent to, or greater than, the amount of water required by a 500 dwelling unit project. (CWC 10912(a).) The proposed Project is a mixed use project which includes a total of 8,490 planned dwelling units, 450,323 square feet of commercial office space, and which would employ over 4,700 persons; therefore a WSA must be prepared for the proposed Project. This WSA has been prepared in accordance with the requirements of SB 610. As required by SB 610, this WSA will be incorporated in the Programmatic EIR prepared for the proposed Project.!"#$%&'()% % % (.((

23 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 1.5 WATER DELIVERY SYSTEM AND WATER SUPPLY Water Delivery System All of the in-tract water distribution facilities will be shown on subsequent improvement plans and will be designed and constructed in accordance with CVWD requirements. The water delivery system will be owned and operated by CVWD. Water distribution facilities will include adequate capacity for daily demands and emergency fire protection. This includes groundwater pumping, transmission pipelines, distribution storage and surface pumping within internal roadways or other rights-of-way to serve all water users within the proposed Project. The proposed water infrastructure includes a domestic water treatment facility, construction of a raw distribution pipelines, reservoirs, production wells, pressure-reducing stations, and booster pump stations as needed. The proposed water distribution infrastructure is presented in Figure 1-4.!"#$%&'()% % % (.(&%

24 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 1-4: Proposed Water Distribution Infrastructure!"#$%&'()% % % (.(/

25 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Water Supply CVWD is the PWS which will provide water for the proposed Project following Project approval and CVWD was formed in 1918 to protect and conserve local water sources. CVWD meets the water related needs across 1,000 squaremiles in various areas of service, including: domestic water; groundwater replenishment and imported water management; wastewater treatment and recycling; storm water protection and flood control; agricultural irrigation and drainage; and water conservation. CVWD is a special district established by the state legislature and governed by a five-member Board of Directors. CVWD currently has approximately 107,000 domestic water connections and provided approximately 93,000 acre-feet of water in 2015 (CVWD, 2016). Areas served with domestic water by CVWD include portions of land near Desert Hot Springs, the Indio Hills area, and a portion of Cathedral City. CVWD serves all of Rancho Mirage, Thousand Palms, Palm Desert, Indian Wells, La Quinta, and a portion of Indio and Coachella. CVWD also serves other rural communities, including Thermal, Mecca, Oasis, Desert Shores, Salton Sea Beach, Salton City, North Shore, Bombay Beach, and Hot Mineral Springs and other portions of unincorporated Riverside County. CVWD service area encompasses 639,857 acres, mostly within Riverside County, but also extends into northern Imperial and San Diego counties, however CVWD provides no urban water services to San Diego County. The Coachella Valley is bordered on the west and north by high mountains, which provide an effective barrier against coastal storms, and which greatly reduce the contribution of direct precipitation to recharge the valley's groundwater basin. The majority of natural recharge comes from runoff from the adjacent mountains Upon approval of the proposed Project by Riverside County, the proposed Project site will be annexed the September 1, 2006 Agreement Regarding Annexation of Proposed Development Project and Potential Conjunctive Use Program in Shavers Valley Basin between CVWD and GLC ( ). A copy of the Annexation Agreement is included in Appendix A. CVWD will supply water to the proposed Project pursuant to the July 10, 2012 Project Services Agreement between CVWD and GLC ). Pertinent excerpts of the Project Services Agreement are included in Appendix A. The proposed Project would have its own water supply which is separate from and independent of, and vice versa. The domestic water supply for the proposed Project would be groundwater produced from the Shavers Valley Groundwater Sub-basin (SVGSB). Groundwater extracted from the SVGSB for Project use would be replenished by Colorado River Water (CRW). Under the terms and conditions of the Water Supply Agreement dated January 1, 2005 between Rosedale-Rio Bravo Water Storage District (RRB) and GLC, as amended by the First Amendment to Water Supply Agreement dated July 24, 2012 (collectively, GLC assigned to CVWD by the Assignment Agreement dated July 10, 2012 between CVWD and the Metropolitan Water District of Southern California (MWD), for the account of CVWD, a minimum 9,500 acre-feet per year (AFY) and a maximum of up to 16,500 AFY via the California Aqueduct. Pursuant to the Exchange Agreements, MWD would accept delivery of the RRB water via the California Aqueduct and would, in turn, deliver a like amount of CRW to CVWD via the CRA as and when MWD has water available!"#$%&'()% % % (.(0

26 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# in the CRA. The Water Supply Agreement provides for total water deliveries of approximately 262,000 acre feet of water. As of December 2016, RRB has delivered 57,500 acre feet of the RRB water to MWD under the terms and conditions of the Water Supply Agreement, which MWD has in turn delivered to CVWD at Whitewater River spreading and recharge facility located northwest of Palm Springs. This water is currently Whitewater River Sub-basin storage area, and has been stored for the proposed Project. Under the terms and conditions of the Project Services Agreement, the proposed of the RRB exchange water. CVWD will permanently retain the 57,500 acre-feet of RRB in its basin and will forgo an equal amount of future MWD aqueduct deliveries so that an equal amount of water is available for delivery to the proposed Project as needed. The RRB exchange water would be delivered to the proposed Project via a new turnout to be constructed on the Colorado River Aqueduct (CRA) near the northwest boundary of the proposed Project site. Water delivered to the proposed Project site at the new CRA turnout would be transmitted to on-site water recharge facilities through a distribution pipeline system, designed and constructed in accordance ed standards, as described in the Project Services Agreement. Water transmitted to the proposed -site recharge facilities would percolate into the SVGSB to replenish groundwater extracted from the SVGSB for Project use. Recycled wastewater will be treated on-site for irrigation of public parks, medians, parkways, and other open spaces. CVWD would be responsible for management of the SVGSB in accordance with the requirements of the Sustainable Groundwater Management Act (SGMA) utilizing the RRB / MWD exchange water. Figure 1-5 presents a schematic of the proposed water supply system for the proposed Project. The federal Environmental Protection Agency (EPA) identifies and regulates contaminants in drinking water to protect public health. The EPA sets regulatory limits for the amounts of certain contaminants in water provided by public water systems. These contaminant standards are required by the Safe Drinking Water Act (SDWA). Water quality testing was performed for the proposed Project (Dudek, 2016). Drinking Water Maximum Contaminant Levels (MCLs) were exceeded for fluoride, aluminum, hexavalent chromium, iron, and arsenic. Groundwater will be treated to meet drinking water standards and consumer confidence reports will be produced annually. A conceptual water treatment plan using reverse osmosis process would be used to meet California Department of Public Health requirements.!"#$%&'()% % % (.(1%

27 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 1-5: Water Supply Systems Schematic!"#$%&'()% % % (.(2

28 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# CVWD - Historical Context successfully implemented major water supply enhancement programs to ensure long-term sustainability. This history of success indicates that the same level of care will be given to the management of the SVGSB. The need to enhance the public water supply in the Coachella Valley has been recognized for many years. The formation of CVWD in 1918 was a direct result of the concern of local residents about a plan to export water from the Whitewater River to Imperial County. Early on, valley residents also recognized that action was needed to stem the decline of the water table, which was occurring as a result of local pumping in the eastern Coachella Valley. As a result, CVWD entered into an agreement for the construction of the Coachella Branch of the All-American Canal in order to bring Colorado River water to the Coachella Valley. Since 1949, the Coachella Canal has been providing water for irrigation use in the area that generally encompasses Indio and La Quinta southerly to the Salton Sea. Colorado River water is delivered to the Coachella Valley via the All American and Coachella Canals and is used for a variety of purposes such as irrigation and groundwater recharge. Growth in the Coachella Valley brought the need for additional water supplies. In 1963, CVWD and the Desert Water Agency (DWA) entered into separate contracts with the State of California to secure SWP supplies for the Coachella Valley (CVWD, 2012). Because a direct pipeline from the SWP system to the Coachella Valley does not exist, CVWD and DWA entered into an exchange agreement with the Metropolitan Water District of Southern California (MWD) to receive water from the MWD Colorado River Aqueduct, which crosses the upper portion of the Coachella Valley near Whitewater. In exchange for Colorado River supplies, CVWD and DWA have their SWP allotments delivered to MWD. Pursuant to this arrangement, since 1973 CVWD and DWA have been receiving and using Colorado River water to supplement and replenish groundwater supplies in the Coachella Valley. In addition, CVWD has recognized the need to provide other sources of water to supplement its water supplies. CVWD has been producing and using recycled water since 1967 and operates five water reclamation plants. Recycled water is currently used for golf course and greenbelt irrigation in the cities of Palm Desert, Indian Wells, and Indio, thereby reducing demands on groundwater and imported supplies. CVWD has developed a robust conservation program to ensure water supply sustainability. Elements of the Program include budget based tiered water rates, water efficiency and turf rebate programs, 015 UWMP Baseline water use. 1.6 EXISTING WATER MANAGEMENT PLANS Projected water demands associated with the proposed Project were not reflected in demand projections in regional water supply planning efforts. However, water supplies for the proposed Project from the GLC-RRB Agreement are acknowledged in CVWD water management planning documents. Regional and project related water supply planning documents are described in more detail in the following sections.!"#$%&'()% % % (.()%

29 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# There are currently no water management plans for the Shavers Valley Groundwater Sub-basin. The Shavers Valley groundwater basin is a subbasin of the Orocopia Valley Groundwater Basin defined in Bulletin 118 as basin The Orocopia Valley Groundwater Basin is a very low priority basin as defined by DWR for SGMA. The Shavers Valley groundwater basin is hydrogeologically separate from the adjacent subbasins in the Orocopia Valley Groundwater Basin and should be considered as a separate basin for preparing a GSP by a GSA. Upon annexation, CVWD will file a notice of election to become a Groundwater Sustainability Agency Coachella Valley Water District Urban Water Management Plan (UWMP) CVWD recently prepared and adopted its 2015 UWMP Update which can be website. Among other things, the 2015 UWMP Update identifies water supplies, projected water demands and its plans for delivering sufficient water supplies throughout through the year The 2015 UWMP Update also describes the reliability of water supplies, its water conservation measures and SBX7-7 compliance, and its water shortage contingency plan. The water services reliability assessment in Section 7 of the 2015 UWMP Update establishes years over the next 20 years will meet its projected water demand. The proposed Project is referenced in the 2015 UWMP Update, however the water supplies and demands of the proposed Project are not included. Section of the 2015 UWMP Update describes the Water Supply Agreement and notes that CVWD received 41,000 acre feet of water from RRB under the Water Supply Agreement in years 2008, 2013, 2014 and Section of the 2015 UWMP Update contains the following information relating to the proposed Project: 4 master planned community known as Paradise Valley is in the planning process. The development would be located in Shavers Valley, an unincorporated area in Riverside County, approximately 15 miles east of the City of approved, the development would annex to CVWD and be subject to all CVWD water management requirements including this UWMP and the requirements of SGMA. The proposed water supply would be obtained from a purchase of firm supply from Rosedale-Rio Bravo Water Storage District. The water would be exchanged with MWD for Colorado River Aqueduct. The water supply for this project would be self-sustaining and would have no impact on CVW 3 RRB delivered an additional 16,500 acre feet of water to CVWD in 2016, bringing the total water delivered by RRB to CVWD under the Water Supply Agreement 57,500 acre feet, in years 2008 and The proposed Project was originally planned as a substantially larger project.!"#$%&'()% % % (.(3

30 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 1.7 EXISTING AGREEMENTS This section summarizes general terms of agreements related to the proposed Project water supplies. Copies of the agreements are found in Appendix A of this report GLC-Rosedale Rio Bravo Water Supply Agreement (2005) and First Amendment (2012) Under the Water Supply Agreement, RRB has the obligation to deliver to CVWD and CVWD has the right to purchase from RRB a Firm Supply of 9,500 of water. CVWD may receive a Supplemental Supply of up to 16,500 AFY from RRB, provided that RRB has water supplies available. RRB will deliver water to the Tupman Branch of the California Aqueduct, and in turn, MWD will deliver CRW to CVWD via the CRA to supply water for the proposed Project via the Exchange Agreements. Water deliveries under the Water Supply Agreement will be made only from the area, (ii) an exchange of such stored County Water Agency, or (iv) other exportable water held by RRB. The Water Supply Agreement provides that if water is not available to RRB from one of the foregoing sources for whatever reason, including a drought, RRB is required to deliver water from one of the other sources. The Water Supply otal amount of approximately 262,000 acre feet of water. The term of the Water Supply Agreement expires on September 30, 2035, along with all State Water Contracts. 5 A copy of the Water Supply Agreement is included in Appendix A GLC-CVWD Annexation Agreement (2006) An Agreement Regarding Annexation of Proposed Project in Shavers Valley Basin (Annexation Agreement) was executed on September 1, 2006 between GLC and CVWD. The Annexation Agreement states that upon approval of the proposed Project, CVWD and GLC shall use their best service area. The Annexation Agreement further provides that after approval of the CVWD annexation, CVWD shall provide water, wastewater, flood control and stormwater management services to the proposed Project under the terms and conditions set forth in the Annexation Agreement. A copy of the Annexation Agreement is included in Appendix A GLC-CVWD Project Services Agreement (2012) CVWD will deliver water to the proposed Project pursuant to the Project Services Agreement between CVWD and GLC dated July 10, Under the terms and conditions of the Project Services Agreement, CVWD will provide the amount of water actually needed to construct and serve the proposed Project. Per the Project Services Agreement, the proposed existing and future customers with respect to deliveries of the RRB water under the Water Supply Agreement. Under the Project Services Agreement, CVWD will manage the supply of water to be 5 The State Water Project Contract extension project is currently underway. California Department of Water Resources (DWR) representatives have acknowledged the need to extend the water contracts of State Water Project contractors such as periods. Therefore, it appears that an extens year 2035 is likely to occur in the relatively near future.!"#$%&'()% % % (.(4

31 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# served to the proposed Project. CVWD and GLC will cooperate with MWD and other applicable agencies to amend existing agreements or enter into new agreements providing for water deliveries to the proposed Project site and the construction of the new turnout on the Colorado River Aqueduct. The Project Services Agreement provides that infrastructure and systems required for domestic water, wastewater, flood control, stormwater management and recycled water services will be constructed Pertinent excerpts of the Project Services Agreement are included in Appendix A GLC-CVWD Assignment Agreement (2012) An Assignment Agreement between CVWD and GLC was executed on July 10, 2012, by which GLC assigned Pursuant to the Assignment Agreement, CVWD agreed to take all commercially reasonable actions necessary to maintain the Water Supply Agreement in effect. Pertinent excerpts of the Assignment Agreement are included in Appendix A CVWD MWD Exchange Agreements There is no direct pipeline from the SWP system to the Coachella Valley. CVWD and DWA have entered into exchange agreements with the Metropolitan Water District of Southern California (MWD) to receive water from the MWD Colorado River Aqueduct, which crosses the upper portion of the Coachella Valley near Whitewater. In exchange, CVWD and DWA have their SWP allotment delivered to MWD. Since 1973, in exchange for their SWP water, CVWD and DWA have been Canyon. This water helps replenish groundwater in the western portion of the Coachella Valley. These Colorado River Aqueduct in exchange for water Delivered directly to MWD from Kern Water Agency. The agreements consist of the 1983 Agreement between the MWD and the CVWD Exchange of Water; the related 1984 Advance Delivery Agreement between MWD, the Desert Water Agency (DWA), and CVWD; and the 2003 Exchange Agreement between the CVWD, MWD, and DWA (CVWD, 2006) CAPITAL OUTLAY All infrastructure required for the delivery of the CRW to the proposed Project site and for the extraction, release, treatment and delivery of water for the proposed Project would be borne by GLC under the terms and conditions of the Annexation Agreement and Project Services Agreement. All costs of purchasing water from RRB, the delivery of CRW to the proposed Project and providing water service to the proposed idents and other occupants would be funded by rates and charges developed by CVWD as provided in the Project Services Agreement. 6 California !"#$%&'()% % % (.&'%

32 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 1.9 NECESSARY REGULATORY APPROVALS The following regulatory approvals will be required to convey and deliver the water supply for the proposed Project: Certification of Programmatic EIR for the proposed Project, by Riverside County Approval of the Paradise Valley Specific Plan and related Project approvals, by Riverside County Annexation of the proposed service area, by LAFCO and CVWD Permits for construction of new turnout on the Colorado River Aqueduct, by MWD - Waste Discharge Requirements (WDRs) and Water Reclamation Requirements per the Porter Cologne Water Quality Control Act (CWC st seq.) - Enrollment in the General Waste Discharge Requirements for Recycled Water Use State of California (Order WQ DDW). This is coordinated through the RWQCB to the State Division of Drinking Water. RWQCB NPDES General Permit for Storm Water Discharges Associated with Construction Activity (WQO No DWQ) CVWD Compliance with Title 17 backflow protect requirements South Coast Air Quality Management District Authority to Construct South Coast Air Quality Management District Permit to Operate!"#$%&'()% % % (.&(%

33 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 2.0 WATER DEMANDS 2.1 CHAPTER SUMMARY This chapter presents the methods used to estimate the water demand for the proposed Project which will be associated with the Project. The total project water demand is 3,588 AFY. Interior water demand for residential use is projected based on accepted per capita demand factors specified in the California Water Code, and interior water demand for nonresidential use is projected based on per square footage demand factors developed by the American Water Works Association Research Foundation (AWWRF). Exterior water demand is calculated using the Maximum Applied Water Allowance procedures (MAWA) in CVWD Ordinance accounting for local environmental conditions. Groundwater will be treated to meet state and federal drinking water requirements. The anticipated use of Reverse Osmosis treatment (RO) will reduce potable water yield by approximately 15% and is identified as Treatment demand. Exterior water demands will maximize use of recycled municipal wastewater, treated to state requirements for unrestricted use. It is estimated that the project will produce 1,438 acre feet per year of recycled water which will be beneficially used to meet exterior water demands. Untreated groundwater may be used to supplement recycled water. 2.2 PROJECT SPECIFIC WATER DEMAND The unit water demands (water use coefficients) calculated for the proposed Project are based on the indoor residential water use provisional standards as provided in Senate Bill No. 7 approved November 10, 2009, codified in California Water Code section (b)(2)(A) for residential water demand; the American Water Works Association Research Foundation (AWWRF) for nonresidential water demands; and the CVWD's Landscape Ordinance No which meets the water conservation goals of the DWR Model Water Efficient Landscape Ordinance (MWELO). The overall goal of the MWELO is to reduce landscape water use, reduce or eliminate runoff in streets, and limit the amount of turf included in new development projects. CVWD's Maximum Applied Water Allowance (MAWA), as outlined in Appendix D of CVWD's Landscape Ordinance is used to estimate outdoor irrigation usage. The MAWA complies with Division 2, Title 23, California Code or Regulation, Chapter 7, Section 702.!"#$%&'()% % &.(

34 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 2-1 presents the interior water demand factors for the proposed Project.! Table 2-1: Interior Water Demand Factors >#/3!?-%! R/$%&41&!"#$%&!! C%.#/3!0#6$1&!!?/4$-!!$&"'$,-"01(B011('$,&"-"$&C( 4 ( KK( J:;'( )*AA$%;"01( 7L7ED( J:'[&\(2-( M;<**1&( 7L447( J:'[&\(2-( 1 DWR 2016 Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use from Section (b)(2)(A) SB 7, Steinberg, Water conservation Residential Interior Water Demands The proposed Project projected water demands are distinguished between interior (potable) and exterior (non-potable) usage. Residential Interior Water Demands are summarized in Table 2-2, for the residential portions of the proposed Project. Table 2-2: Residential Interior Water Demand A,6&%-B! S(.9%&!17! CD%**4/=!?/4$-! 2%&-1/-! 2%&!?/4$! P%-43%/$4#*! R/$%&41&! C%.#/3! 0#6$1&! A=)63B! P%-43%/$4#*! R/$%&41&! C%.#/3! DEF( G/747( 6LEF( KK( B@I?!C( 5F7( G/GEE( 6LD5( KK( KKG( I"J<(?$,&"-.(!$&"'$,-"01(BI?!C( KE( KGK( 6L5F( KK( F6( I"J<$&-(?$,&"-.(!$&"'$,-"01(BII?!C( 44( 644( 6LG5( KK( 85( 4/GGK( 6L5F( KK( 675( P%-43%/$4#*!O1$#*! FGLUU! HGIJK! ULGKMV! WW! FGIUU! ( ( ( ( ( ( Non-Residential Interior Water Demands The AWWARF Commercial and Institutional End Uses of Water (AWWRF, 2000) study report was used to estimate interior non-residential water use for the proposed Project. It provides water use data applicable to mixed use commercial development projects of desert areas within southern California and Arizona, and sets water efficiency benchmarks for specific commercial uses. Based on these benchmarks, usage factors for schools and commercial land uses were developed for the proposed Project. Table 2-3, Interior Non-residential Water Demands, summarizes nonresidential water demands.!"#$%&'()% % &.&

35 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# For planning purposes the calculation of water demands for schools is based on 50% of the gross area being dedicated to interior uses and 50% to exterior uses. Table 2-3: Non-Residential Interior Water Demand >#/3!?-%! :(4*34/=!,&%#! A-XW7$B! R/$%&41&!?/4$! C%.#/3!!!!! A=)3Y-XW7$B! R/$%&41&!S1/W P%-43%/$4#*! C%.#/3!A,0TB! M;<**1&( 4/FK4/G77( 7L447( 668( )*AA$%;"01(!$-0"1(B)!C( 4EF/EK7( 7L7ED( 4/4F6/757( 7L7ED( 468( S1/WP%-43%/$4#*!C%E%*1).%/$!O1$#*! LGULUGUJK! WW! LMV! Landscape Irrigation Demand The Coachella Valley receives an average annual precipitation of less than 6 inches (15 centimeters), extreme temperatures as high as 120 degrees Fahrenheit, and a wide daily temperature range. Annual rainfall is normally less than 5.5 inches and several maximum monthly average temperatures exceed 100 degrees Fahrenheit. The total potential for evapotranpiration in the Coachella Valley is well above the total rainfall, and is due to extreme high temperatures, abundant availability of sunlight, and the rain shadow effect of the San Jacinto and Santa Rosa Mountains. The Coachella Valley rarely experiences a water surplus condition of precipitation when compared to evapotranspiration. Prime evapotranspiration sites in the Valley are well-watered lawns, decorative water fountains, lakes and golf courses. Landscape Ordinance No This formula ensures that an adequate budget is provided to have rate, a plant factor to irrigation efficiency ratio, otherwise area. MAWA = ETo x 0.45 x Landscaped Area This calculation determines the upper limit of irrigation water allowed for the project. To meet the ETAF of 0.45, a landscape design must use highly water efficient plant material laid out in a sparse manner, and irrigated with efficient irrigation technology including drip emitters and smart controllers. This method ensures that a sufficient budget is provided to have a sustainable landscape that meets the project was used to determine project irrigation demand. The equation uses an ETo rate of 75 inches (6.25 feet) per year, which is the ETo rate for CVWD Zone 3. The project is outside the ETo information maintained by the water district or established through the stations located throughout the Coachella Valley agricultural zone. As the CVWD ETo Map boundaries do not encompass the project site, a comparison!"#$%&'()% % &./

36 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# site was located with the use of USGS maps for topography, Google Earth maps and the CVWD ETo map. (Refer to the Figure 2-1 below.) The comparison site is located adjacent to Indio Hills and is fundamentally similar to the project site. The solar aspect is similar, the general elevation, soils and vegetation are similar as well. The comparison site straddles site (superimposed on the CVWD ETo Map in the image below) is located approximately one mile east of the CVWD ETo Map boundary and the CVWD ETo Zone 3 designation. In light of these factors, the ETo of the project site has been conservatively estimated, based on the substantially similar comparison site located in CVWD ETo Zone 3, to be Figure 2-1 CVWD ETo Map With Comparison Site and Project Site Comparison Site Paradise Valley Site!"#$%&'()% % &.0

37 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Therefore, MAWA for the Paradise Valley project, expressed in acre feet per year, is determined by multiplying the ETo of 6.25 feet per year by the 0.45 Evapotranspiration Adjustment Factor (ETAF) of 0.45, and further multiplying that product by acres, being the total number landscaped acres within the project. This calculation yields a total MAWA for the project of 1,522 acre feet of water per year. Table 2-4 below presents the MAWA calculation for each land use category within the project, and the total MAWA calculation for all land uses within the project. Table 2-4: MAWA Calculation Table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requirements.( Recycled Water The proposed Project would use available recycled water, backed up by untreated groundwater, for irrigation purposes including residential landscaping, roadway medians, common use areas, mixed use/commercial, public facilities and open space recreation areas. Recycled water generation is estimated to be 1,438 AFY at full build-out based upon an 80% potable water return rate. All recycled water will be put to beneficial use in accordance with proposed water reclamation plant discharge permits. Total exterior demand is 1,522 AFY as presented in Section and Table 2-4 above. Table 2-5 below presents a schedule reflecting exterior water demand versus recycled water availability for the project.!"#$%&'()% % &.1

38 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 2-5: Recycled Water Schedule of Availability P%6+6*%3!"#$%&!'())*+!Y!C%.#/3!A,0TB(!TZ,P!!UKFV!!!UKUK!!!UKUV!!!UKLK!!!UKLV!! TR-$%"*%(>0-$%(?$A0,'(B^QaC( 7( 7( (66F(( (8D4(( (4/K66(!$;.;1$'(>0-$%(M+::1.(B^QaC( 7( 7( (64D(( (84E(( (4/5GF((?"22$%$,;$(-*(P$(&+::1"$'(P.( +,X-%$0-$'(J%*+,'W0-$%( 7( 7( 46( 56( F5( Groundwater Treatment Demand As discussed further in Section 3, groundwater to be used for potable water demands requires treatment Valley Groundwater Sub-basin. Five wells on the Project site were sampled and analyzed for applicable drinking water parameters. Results indicate that ambient groundwater concentrations exceed respective drinking water standards within the project area for TDS, fluoride, aluminum, arsenic, hexavalent chromium (Cr6), and gross alpha. Aluminum concentrations in 4 of the 5 wells exceed the secondary maximum contaminant level (SMCL); however, it appears that aluminum concentrations may be overestimated based on the observed strong correlation with sample turbidity. Cr6 concentrations may increase with depth in the basin. Conventional water treatment process units were screened and a conceptual process scheme was developed to produce water compliant with California Drinking Water Standards. Reverse osmosis could be employed in this conceptual treatment scheme to bring TDS down to the recommended SMCL of 500 mg/l if the California Department of Public Health (CDPH) requires treatment to this level. Odor, color, and iron will be removed by ozonation. The Paradise Valley Groundwater Study (Dudek, 2016) describes the conceptual water treatment required to meet California Department of Public Health requirements. The report states that a proposed reverse osmosis process would operate with a recovery rate of 85%. Therefore, an additional supply of raw groundwater approximately 15% above the actual potable water demands, or 269 AFY, is required for the proposed Project. A total pretreated groundwater supply of 2,066 AFY is therefore required to meet the potable water demands of the Project, as follows: 1,797 AFY of Interior Demand AFY Groundwater Treatment = 2,066 AFY Potable Water Demand Proposed Project Water Demand Summary The proposed Project has a total water demand of 3,588 AFY. The estimated interior water use is 1,797 AFY (the sum of 1,422 AFY residential and 375 AFY non-residential). An additional 269 AFY is required for groundwater treatment. Exterior, non-potable water demands are estimated to be 1,522 AFY. A summary of total water demand net of recycled water is presented in Table 2-6, Project Water Demand Summary.!"#$%&'()% % &.2

39 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 2-6: Project Water Demand Summary >#/3!?-%! R/$%&41&!! A,0TB! Z^$%&41&!! A,0TB! O1$#*! 2&18%6$!! "#$%&! C%.#/3!! A,0TB! P%6+6*%3! "#$%&!'())*+! A7(**!9(4*3W 1($B! A,0TB! O1$#*!C%.#/3! >%--!P%6+6*%3! "#$%&!A,0TB!!$&"'$,-"01( 4/566( XX( XX( ( ( )*AA$%;"01( G8K( XX( XX( ( ( M+PXN*-01( 4/8E8( 4/K66( G/G4E( ( ( N%$0-A$,-( 6DE( XX( 6DE( ( ( NUN^]( 6/7DD( 4/K66( G/KFF( 4/5GF( 6/4K7( In summary, the proposed Project has a total water demand of 3,588 AFY (2,066 AFY of interior (potable) water demand + 1,522 AFY exterior water demand). 1,438 AFY of the 3,588 AFY of total project water demand will be met by recycled water generated by the proposed Project, yielding a total project water demand less recycled water equal to 2,150 AFY. 2.3 WATER CONSERVATION MEASURES 7 CVWD has made significant efforts to provide private and public consumers of local water resources with information to help conserve these resources through the use of drought tolerant desert plants and efficient irrigation systems. CVWD has had a water conservation program since the 1960s. CVWD manages at least 14 Demand Management Measures to promote water conservation. These measures include public information campaigns, school curriculum on water conservation, incentives for landscape retrofitting programs, budget based tiered water rates and rebates for purchasing advanced irrigation systems. The 2010 CVWMP Update and the 2015 UWMP identify several conservation measures with the goal of reducing urban water demand 20% by These include water efficient landscaping and irrigation, efficient plumbing and appliances, tiered or budget based water pricing, public information and education programs, promoting alternative water supplies, water restrictive municipal development policies, and maximum water allowance for landscaped and recreational areas. CVWD employs a full-time conservation coordinator with sufficient staffing to review all new Desert Landscaping: Native and Other Drought Tolerant Plants CVWD has actively promoted native and other drought-tolerant planting materials during landscape design through the passage of Landscape Ordinance Recycled water would be used, as 7 Although the water demands of the proposed Project have been calculated based on the criteria specified in Section 2.1 will be designed, constructed and operated in an efficient, water-wise manner. Therefore, although the water demand calculations contained in this WSA are based on a worst-case scenario, the water conservation measures described in this section will be implemented in order to reduce interior and exterior water usage associated with the Project.!"#$%&'()% % &.)%

40 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# available, for irrigation purposes while preserving potable water for domestic uses. Values and benefits of landscaping practices that integrate and go beyond the conservation and efficient use of water; Establish a structure for planning, designing, installing, and maintaining and managing water efficient landscapes in new construction; Provisions for water management practices and water waste prevention; Setting a Maximum Applied Water Allowance for an upper limit for water use and reduce water use to the lowest practical amount; Promote the benefits of consistent landscape criteria with neighboring local and regional agencies; and, Promote water conservation though climate appropriate plant material and efficient irrigation systems. The proposed Project will be required to follow the landscape regulations set forth by the landscape ordinance, as amended from time to time. In addition, landscaping of the proposed Project would implement the following irrigation best management practices: Utilize current best practices in sustainable site development; be adaptable to new technologies as they prove themselves reliable. Incorporate the requirements of the CVWD landscape ordinance to create a sustainable, desert-appropriate development context. Incorporate best management practices per the requirements of the CVWD landscape ordinance with Development Standards and Design Guidelines that create an efficient, aesthetically pleasing and desert appropriate landscape program that will be implemented by homeowner association regulations. Implement a planting palette that takes into consideration adjacency to natural open space, native and regionally appropriate plants, water efficiency and expressly prohibits invasive and exotic species. Recycled water should be incorporated into the project irrigation systems. Efficient irrigation equipment such as inline drip irrigation, bubbler, spray heads, and/or rotor irrigation heads should be used to the extent practicable Project-Specific Water Use Reduction Measures The proposed Project will incorporate a broad range of water conservation design features to address potential impacts on water resources. The proposed Project will implement the following features to assure the most efficient use of water resources and to meet the CVWMP 2010 Update and 2014 Status Report goals throughout the life of the proposed Project: Using available recycled water for residential landscape irrigation. Using available recycled water for open space, public facilities irrigation. Using available recycled water for commercial landscape irrigation. Budget Based Tiered Rates The proposed Project will also implement the following measures to ensure the efficient use of water resources and to meet and maintain the goals of CVWD:!"#$%&'()% % &.3

41 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# To the greatest extent practicable, native plant materials and other drought tolerant plants will be used in all non-turf areas of the proposed Project landscaping. Large expanses of lawn and other water-intensive landscaped areas shall be kept to the minimum necessary and consistent with the functional and aesthetic needs of the proposed Project, while providing soil stability to resist erosion. The installation and maintenance of efficient onsite irrigation systems will minimize runoff and evaporation, and maximize effective watering of plant roots. Drip irrigation and moisture detectors will be used to the greatest extent practicable to increase irrigation efficiency. The use of low-flush toilets and water-conserving showerheads and faucets shall be required in conformance with Section of the Health and Safety Code, Title 20, California Code of Regulations Section 1601(b), and applicable sections of Title 24 of the State Code. Appropriate landscaping, non-potable reclaimed, or well water for irrigation purposes (when available), and high efficiency plumbing fixtures and appliances will be used. Utilize high efficiency plumbing and fixtures that meet or exceed the CalGreen code (most current adopted version). Utilize efficient irrigation controls to reduce water demand on landscaped areas throughout the proposed Project. Reduce the amount of irrigated turf in parks to those uses dependent upon turf areas; Implement dual plumbing within the recreation, landscaped medians, common landscaped areas, mixed-use/commercial planning areas, and parks to allow for the use of recycled water. The Paradise Valley Specific Plan would be required to implement the CVWD conservation measures and landscape ordinance in order to assure the most efficient use of water resources and to meet and maintain the CVWMP goals throughout the life of the proposed Project Recycled Water Paradise Valley is geographically separated from CVWD sewage infrastructure, therefore a wastewater system will be built to serve the proposed Project area independently. Wastewater will be collected and treated to tertiary treatment standards to be used as Wastewater will be treated to California Title 22 standards for reuse in recycled water systems. The proposed Project will recycle wastewater generated from sanitary sources. A separate recycled water distribution system will be installed with services to landscape irrigation. Available recycled water will be utilized for irrigation in the following areas: Commercial landscapes, Common area landscapes, Residential landscapes using recycled water for front yards only, Recreational parks and trails, Linear parks, Street parkways and medians.!"#$%&'()% % &.4

42 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 3.0 WATER SUPPLY ASSESSMENT 3.1 GENERAL The following section describes the water supply sources that will serve the proposed Project. CWC section 10910(d) requires a WSA to include identification of any existing water supply entitlements, water rights or water service contracts held by the PWS, and a description of the quantities of water received in prior years by the PWS under those entitlements, rights and contracts. 3.2 IDENTIFICATION OF WATER SOURCE / EVALUATION OF GROUNDWATER BASIN Groundwater The primary source of water supply for the proposed Project will be groundwater produced from SVGSB. The proposed water supply system would consist of a series of wells to be located throughout the proposed Project area to supply groundwater extracted from the underlying groundwater basin treatment plant and water distribution system. Groundwater produced from the SVGSB would be replenished by water provided by CVWD pursuant to the RRB Water Supply Agreement. CVWD would be responsible for management of the SVGSB in accordance with the requirements of the Sustainable Groundwater Management Act (SGMA) utilizing the RRB/MWD exchange water. Under the Water Supply Agreement, RRB will deliver at minimum 9,500 AFY and at maximum up to 16,500 AFY to MWD via the California Aqueduct. MWD would accept delivery of the RRB water and would, in turn, transmit MWD water as and when available to CVWD for delivery to the proposed Project via a new turnout to be constructed on the Colorado River Aqueduct (CRA) near the northwest portion of the proposed Project site. Water delivered to the proposed Project site at the CRA turnout would be transmitted to on-site water recharge facilities through a distribution pipeline system designed and constructed in acco CRW would also be available for potential direct domestic use following treatment. Recycled wastewater would be treated on-site for irrigation of front yard landscapes, public parks, medians, parkways, and other open spaces. The water supply for the proposed Project would also include local surface water captured from runoff and recycled water for irrigation purposes. K9:9898 'L"M$%-&5"**$+&N%1(/3O"#$%&'(HJH"-4/& CWC section 10910(f) requires additional information in the WSA when groundwater is cited as a water supply source for a proposed Project. The additional information includes a description of the basin, the rights of the PWS to use the basin, the overdraft status of the basin, any past or planned overdraft mitigation efforts, historical use of the basin by the PWS, projected use of the basin by the proposed Project, and a sufficiency analysis of the basin that is to supply the proposed Project under analysis in the WSA. The California DWR published the Bulletin 118 -basins with information about basin geology, groundwater quantity and quality, and current groundwater management practices. The Orocopia Valley Groundwater Basin (OVGB) is designated as basin Shavers Valley Groundwater Sub-basin (SVGSB) is a sub-basin of the Orocopia Valley Groundwater Basin (OVGB) (Figure 3-1). The OVGB underlies Orocopia Valley, northeast of the Salton Sea, in central Riverside County. It covers a surface area of 96,000 acres.!"#$%&'()% % /.(

43 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# SVGSB occupies an east-west trending structural Shavers Valley and consists of Quaternary alluvial sediments and older sedimentary units beneath the Quaternary alluvium that store and are capable of producing groundwater. Recharge is derived from runoff from surrounding mountains during precipitation events. The geophysical studies conducted by Dr. Shawn Biehler (Biehler, 2001; 2005) generated a composite basement depth map showing a long narrow trough extending south and turning sharply eastward. There is a major closed depression in the basement near the intersection of I-10 and Highway 195 with a sediment thickness of over 3,000 feet. SVGSB appears to be one large continuous basin, closed on all sides with a shallow outlet in Box Canyon to the south at Shavers Well. The Paradise Valley Groundwater Study (Dudek, 2016) was completed for the proposed Project in December 2016 to evaluate the hydrogeological potential of extracting groundwater from the SVGSB for use by the proposed Project and replenishing the SVGSB with CRW. Dudek utilized a MODFLOW groundwater model to estimate the amount of available water storage in the SVGSB and under the proposed Project site. The groundwater model estimates that there is approximately 1,665,000 AF of available water storage space in the SVGSB, of which 174,000 AF of available water storage space underlies the proposed Project. (Dudek, 2016). The model estimates that there is approximately 2,618,000 AF of existing groundwater in storage within the SVGSB, approximately 510,000 AF of which is located beneath the boundaries of the proposed Project. Basin recharge is primarily from the infiltration of surface runoff from the surrounding mountains and hills. Groundwater modeling work as part of the Dudek Groundwater Study, estimated the amount of natural recharge to the SVGSB to be approximately 1.75 percent of the precipitation falling on the watershed, or approximately 720 AFY (Dudek, 2016). Outflow from the SVGSB occurs through subsurface outflow through the Mecca Hills, and is estimated to be about 720 AFY. Rights of the PWS to the Basin: The proposed Project over eement Regarding Annexation of terms under which CVWD would accept and manage Project water supplies. CVWD has the legal authority to manage the groundwater basins within its service area under special provisions of the County Water District Law (California Water Code, Division 12, Sections ). Overdraft Status of the Basin: DWR has not determined that the SVGSB is in a state of overdraft and has not projected the SVGSB to become overdrafted. There has been no significant historical, and there is no current, water extraction from the SVGSB. According to the Dudek Groundwater Study, the SVGSB is fully charged, and there currently exists an estimated 2,618,000 AF of groundwater stored in the sub-basin. Groundwater Basin Management: The Sustainable Groundwater Management Act (SGMA) was enacted in 2014 to provide a statewide framework for obtaining sustainable groundwater management in California. SGMA went into effect on January 1, 2015 and is intended to support groundwater management through local agencies, which are required to form Groundwater Sustainability Agencies (GSAs) by June 30, The GSAs must develop a Groundwater Sustainability Plan (GSP) for Bulletin 118-defined groundwater basins, or sub-basins, that are designated by DWR as medium or high priority by 2020 or 2022 (depending on whether the basin or sub-basin is critically overdrafted), and achieve groundwater sustainability within 20 years of adopting a GSP. Although not required, SGMA encourages and authorizes basins or sub-basins designated as low and very-low priority to be managed under GSPs.!"#$%&'()% % /.&

44 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# The Shavers Valley Groundwater basin is a sub-basin of the Orocopia Valley Groundwater Basin defined in Bulletin 118 as basin The Orocopia Valley Groundwater Basin is a low priority basin as defined by DWR, and thus is not subject to SGMA at this time. The Dudek Groundwater Study report includes a proposed management plan recommendations for management of the groundwater extraction and replenishment program of the proposed Project. These recommendations include: General Monitoring and Reporting Basin Management Objectives Basin Management Strategies Identification and management of wellhead protection areas and recharge areas Updating of groundwater model Salt and Nutrient Management Plan (SNMP) Recommended Project Mitigation Triggers Adherence to the Groundwater Management Plan would be required by a mitigation measure identified in the proposed Project approval. Historical Use of Basin by the PWS: CVWD has no historical use of the Shavers Valley Groundwater Sub-Basin. Previous groundwater investigations in Shavers Valley consisted of investigatory work related to the potential use of Shavers Valley by MWD for groundwater recharge and recovery, and a project hydrogeological study for the proposed Project. There are eight known monitoring and production wells in Shavers Valley. As early as 1933, MWD constructed two wells in the valley. The Southern California Gas Company constructed well T6SR10E-11 N1 in 1952 to supply cooling water to the Gas Plant Compressor, but the well has been inactive since at least Another well (T6SR11E-19 N1) was identified in previous groundwater studies, but was not found during field investigations. Well T6R10E-7 G1 was reported to be within the Shavers Valley, but was found to be located outside of the groundwater basin during field investigations. Five monitoring wells were constructed during previous groundwater basin studies. Four of the wells were located in the field during field investigations. There has been no significant historical, and there is no current, water extraction from the SVGSB. According to Dudek, the SVGSB is fully charged, and there currently exists an estimated 2,618,000 AF of groundwater stored in the sub-basin. Natural Recharge: Per the Dudek Groundwater Study, the SVGSB receives approximately 720 AFY of subsurface inflow, or natural recharge to the basin. Additional Water Sources- Recycled Water: Available recycled water will be the supplied to the proposed Project for exterior landscape irrigation demands as described previously in Section !"#$%&'()% % /./

45 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Hydrogeological Characteristics of the SVGSB In the course of conducting the Dudek Groundwater Study, Dudek obtained and evaluated available geological and hydrogeological information on Shavers Valley and the surrounding area. One production well and five monitoring wells were constructed at strategic locations within the vicinity of the proposed Project. The wells were lithologically and geophysically logged. Aquifer pumping tests were conducted, and water quality data was obtained and evaluated. Water levels and water temperatures were measured in the wells. Dudek tested CRW quality and obtained historical CRW water quality data, and soil/crw tests were conducted to evaluate potential water quality changes during water recharge and storage. An infiltration test pond was constructed as part of the study and falling-head and constant-rate infiltration tests were conducted. Metal and exploration geochemistry testing was conducted on selected drilling samples. Soil sieve analyses were conducted on selected drilling intervals, and a MODFLOW groundwater model was constructed, ran and evaluated for a number of scenarios to determine extraction and replenishment impacts. The groundwater extraction and replenishment program for the proposed Project provides for water extraction from the SVGSB for use by the proposed Project, followed by periodic recharge with CRW delivered to the proposed Project site through the exchange process contemplated under the RRB Water Supply Agreement. It is anticipated that deliveries of RRB water may be interrupted by periodic drought or other adverse circumstances. 8 Therefore, the groundwater extraction and replenishment program was designed to provide for continual groundwater extraction to meet the water demands of the proposed Project, followed by periodic replenishment at times when RRB water and CRW are available, primarily during wet periods. The Dudek Groundwater Study concludes that there is adequate groundwater in the SVGSB to meet the projected water demand associated with the proposed Project over extended intervals with periodic and ongoing recharge events. As noted above, the SVGSB has approximately 1,664,700 acre feet of available storage capacity and approximately 2,618,000 acre feet of existing modeling indicates that the proposed Project could extract 22,050 acre feet of native groundwater over a ten year period before recharging with CRW, without significant adverse impacts to the SVGSB. Conversely, recharged at the proposed Project site over a one year period could be recovered during a subsequent eight year extraction period without intervening recharge events, while meeting the needs of the proposed Project, without significant losses or adverse impacts to the SVGSB. It should be noted that the foregoing modeling scenarios were designed to evaluate the hydrogeological characteristics of the SVGSB, and do not suggest that these scenarios are anticipated to occur. To evaluate the hydrogeological characteristics of the SVGSB under less extreme circumstances, Dudek modeled two additional recharge scenarios and six additional extraction scenarios, ranging from the base (No Project) scenario, to scenarios involving recharge of a three year Project supply (6,615 AF) followed by three years of extraction to meet proposed Project demands, and scenarios involving the extraction of up to 2,205 for three, six and eight years assuming both average and one-half of average natural recharge to the SVGSB, none of which indicated significant adverse impacts to the SVGSB. 8 ly Agreement totaling 31,000 acre feet of water, during extreme drought conditions.!"#$%&'()% % /.0

46 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Groundwater Treatment Groundwater treatment will be required to meet drinking water standards under the Federal Safe Drinking Water Act (Title XIV of the Public Health Service Act); the Safety of Public Water Systems Act (Safe Drinking Water Act) and Titles 22 and 17 of the California Code of Regulations. The treatment process will be determined by CVWD and approved by the DDW Proposed Project Groundwater Impact Assessment K9:9K98 ;$6L"%<$&P.)"6#-& There is no current groundwater production from the Shavers Valley Groundwater Sub-basin. As discussed above, modeling conducted by Dudek estimates that there is approximately 1,665,000 AF of water storage space in the SVGSB, of which 174,000 AF underlies the proposed Project. Approximately 30,000 AF of groundwater is stored within the proposed Project boundary south of the North Chiriaco Fault where the proposed Project recharge basins are proposed (Dudek, 2016). According to the Dudek Groundwater Study, the SVGSB receives approximately 720 AFY of subsurface inflow, or natural recharge, to the basin. ter supply will be groundwater from the SVGSB that will be recharged with Colorado River Water from the CRA. The proposed Project total water demand net of recycled water of 2,150 AFY (as calculated in Section 2) will be met by the extraction of 2,150 AFY of groundwater from the SVGSB. Under the RRB Water Supply Agreement, RRB is required to deliver a firm water supply of 9,500 AFY and up to 16,500 AFY of supplemental water 9 to replenish the SVGSB. Per the Dudek Groundwater Study, the available storage capacity beneath the proposed Project south of the North Chiriaco Fault while maintaining a 50-feet unsaturated zone between the water table and land surface is 30,000 AF. This is the area where the imported CRW would be stored. The total available storage capacity beneath the proposed Project boundary (in addition to the existing groundwater in storage) is 174,300 AF. Therefore, sufficient available storage capacity exists within the proposed Project area for the needed water storage. Modeling results indicate that an increase in groundwater elevations near Box Canyon could occur due to increased groundwater head from recharge if the recharged water were not recovered, and if there were no native groundwater pumping prior to recharging. However, the use of native groundwater is the primary water supply for the proposed Project which would allow for recharged water storage capacity prior to recharge, and would prevent basin water losses. Groundwater modeling conducted by Dudek indicates that 18,000 AF recharged into the SVGSB in one year at the proposed Project site could be extracted over a period of 8 subsequent years without significant water loss or adverse impacts to the basin. This modeling was conducted for the purpose of evaluating the recharge qualities of the basin. This being noted, it is anticipated that the proposed Project will receive annual CRW deliveries which will be used to replenish the SVGSB on a more frequent and ongoing basis as groundwater is extracted for Project use. Additionally, the proposed Project will have the flexibility of storing a portion of the CRW in the SVGSB, while the rest could be delivered via turnouts directly to the proposed onsite water treatment plant. CVWD also has the capability of receiving delivery of CRA water from MWD at River recharge 9 Under the RRB Water Supply Agreement RRB is required to deliver a firm water supply of 9,500 AFY and up to 16,500 AFY of ally unde proposed Project.!"#$%&'()% % /.1

47 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# facility, storing the water at that facility and thereafter making deliveries to the proposed Project site through exchanges with MWD on an as-needed basis. ability to supply CRA water to the proposed Project site. This water delivery flexibility, and the proposed conjunctive use management as discussed in the Groundwater Management Plan (GMP) proposed by Dudek in its Groundwater Study (see Appendix G to Dudek Groundwater Study, 2016), will ensure that no adverse impacts will occur to the SVGSB from recharge activities, or loss of recharged water. Further detailed analysis of recharge impacts is presented within the Dudek Groundwater Study. K9:9K9: ;$61M$%+&P.)"6#-& The proposed Project will utilize native groundwater for initial construction. Native groundwater used for construction will be untreated non-potable groundwater that will not need to comply with potable drinking water regulations of California Code of Regulations Title 22 and with the California DDW. As noted in the Dudek Groundwater Study, groundwater modeling indicates that the proposed potable water requirements could be extracted annually from the SVGSB, without replenishment, for at least 10 years without adverse impacts to the basin. This modeling was conducted for the purpose of evaluating the recovery capabilities of the basin. It is therefore anticipated that the proposed Project will receive annual CRW deliveries which will be used to replenish the SVGSB on a more frequent and ongoing basis as groundwater is extracted for Project use. Based on the analysis conducted by Dudek, adverse impacts from the extraction of groundwater for the proposed Project are improbable. Active groundwater level monitoring and proactive groundwater conjunctive use management as discussed in the Groundwater Study (Dudek, 2016) and the GMP (Appendix G to the Dudek Groundwater Study) will ensure that no adverse impacts will occur to the Shavers Valley groundwater basin from groundwater extraction activities. K9:9K9K Q"-4/&N%1(/3O"#$%&'#1%"<$&"/3&'#1%"<$&?")"64#+&P.)"6#-& The Shavers Valley groundwater basin has about 1,664,700 AF of available storage capacity and about 2,618,000 AF of existing groundwater in storage. The total groundwater extracted from the SVGSB over a 20 has been no significant historical, and there is no current water extraction from the SVGSB, and the basin is currently fully recharged. The proposed Project would be the only significant water demand within the SVGSB. As discussed above, groundwater extracted from the basin will be replenished with CRA exchange water. As noted in the Dudek Groundwater Study, adequate groundwater storage exists in the SVGSB, and the proposed Project would not result in adverse storage or capacity impacts. K9:9K9R!"#$%&S("*4#+&P.)"6#-& The Dudek Groundwater Study concludes that replenishing extracted groundwater with CRW should have a net beneficial effect to groundwater in the SVGSB by reducing the level of some problem constituents and increasing the overall water quality. Several basin groundwater constituents are above their Maximum Contaminant Levels (MCL) and replenishing with CRW having lower contaminant MCLs for these constituents would improve the water quality. The generally higher quality of the CRW should decrease the high iron, fluoride, aluminum, chromium VI, and gross alpha in the groundwater levels. The proposed Project Groundwater Study (Dudek, 2016) notes that a potential balance would occur if recharged CRW were not recovered by extraction wells and used for the proposed!"#$%&'()% % /.2

48 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Project. A three-year storage of CRW at full Project build-out would add approximately 540 tons of salt to the portion of the basin underlying the proposed Project site during the storage period. However, groundwater modeling particle tracking shows that the recharged water would be recovered by the Project wells. Therefore, the overall salt increase to the basin would be minimal. K9:9K9C P.)"6#-&#1&,37"6$/#&,%$"-A&N%1(/3O"#$%&Q"-4/-A&"/3&'(%0"6$&!"#$%& A decrease in subsurface outflow from the Shavers Valley groundwater basin would occur with native groundwater pumping between recharge events. According to modeling conducted by Dudek, the extraction of native groundwater up to 22,050 AF in a ten year period (2,205 AFY for 10 years), without replenishment, would decrease the current subsurface outflow from the Basin to the alluvium in Box Canyon and to the Mecca Hills Palm Springs Formation and Ocotillo Conglomerate by up to 16,084 AF by the end of the ten year period. 10 The Dudek Groundwater Study notes that such a decrease in subsurface outflow would not be discernable at outflow would not affect sensitive areas such as the Salton Sea, since the SVGSB is separated from the Salton Sea area by very low permeability units of the Palm Springs Formation and Ocotillo Conglomerate in the Mecca Hills, and by the impermeable bedrock units in the Orocopia Mountains. 10 This modeling was conducted for the purpose of evaluating impacts on a worst-case basis, and does not suggest an anticipated 10 years of extraction without intermittent recharge.!"#$%&'()% % /.)

49 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Figure 3-1 Shavers Valley Groundwater Basin!"#$%&'()% % /.3

50 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Groundwater Sufficiency Analysis The proposed Project would begin construction in Total water demand of the proposed Project is estimated to be 3,588 AFY. It is expected that the proposed Project would be the only significant water demand within the SVGSB. With 1.67 MAF of available groundwater storage space, 2.62 MAF of groundwater in storage, the availability of RRB water for replenishment, and the groundwater management framework that has been developed, the SVGSB is sufficient to supply the demands of the proposed Project during normal, single dry, and multiple dry year periods over the next 20 years. 3.3 RECYCLED WATER Wastewater, when appropriately treated and disinfected, can be reused for landscape irrigation and other purposes; treated wastewater as envisioned by the proposed Project would not be suitable for potable use, but is suitable for landscape irrigation and other non-potable uses. Recycled wastewater has historically been used for irrigation of golf courses and municipal landscaping in the Coachella Valley since the early 1960s. A new recycled water treatment plant will be constructed as part of the proposed Project. As described in Section 2.2.3, available recycled water will be utilized for irrigation throughout the proposed Project. Approximately 1,438 AFY of recycled water would be available to the proposed Project at build out based upon an 80% potable water return rate. Any shortfalls of recycled water needed for irrigation would be backed up with untreated groundwater.!"#$%&'()% % /.4

51 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 4.0 ANALYSIS OF SUPPLY AND DEMAND Tables 4-1 through 4-3 present the normal year, single dry year and multiple dry years supply and demand projections for the proposed Project through The proposed Project is assumed to build out in a 13-year period between 2023 and By 2035, the proposed Project is estimated to require 1,797 AFY of potable water, 269 AFY of untreated groundwater for treatment purposes, and 1,522 AFY of water for landscape irrigation purposes. Total proposed Project demand at build-out is 3,588 AFY. The proposed Project is geographi of the water supply and demand for the proposed Project. water supplies available to CVWD during normal, single dry and multiple dry water years during a 20 year future uses, including agricultural and manufacturing uses, other than the proposed Project. The water supply for the proposed Project will be groundwater produced from the SVGSB. Groundwater produced from the SVGSB will be replenished by CRW provided by CVWD via the RRB MWD exchange process contemplated in the Water Supply Agreement and the Exchange Agreements between CVWD and MWD. Since groundwater production will be driven by potable demand, groundwater supplies will equal Project water demand. The supply will not vary in single or multiple dry year scenarios. As discussed in the Groundwater Study (Dudek, 2016) the SVGSB has approximately 2,618,000 AF of groundwater in storage, has a natural recharge of 720 AFY, and is adequate to meet the water demand associated with the proposed Project. The groundwater extraction and replenishment program for the proposed Project will be managed by CVWD pursuant to a GMP. Under the terms and conditions of the Water Supply Agreement, RRB is obligated to deliver to MWD for the account of CVWD, a minimum of 9,500 AFY and a maximum of up to 16,500 AFY via the California Aqueduct. Pursuant to the Exchange Agreements as referenced in Section above, MWD will accept delivery of the RRB water via the California Aqueduct and will, in turn, as available, deliver a like amount of CRW to CVWD via the CRA. The Water Supply Agreement provides for total water deliveries of approximately 262,000 acre feet of water. Under the terms and conditions of customers with respect to deliveries of the RRB exchange water. As of December 2016, RRB has delivered 57,500 acre feet of the RRB water to MWD under the terms and conditions of the Water Supply Agreement, which MWD has in turn delivered to CVWD at This water is currently Whitewater River Sub-basin storage area, has been pre-delivered and is in storage pending use by the proposed Project. This 57,500 acre feet of pre-stored water alone constitutes a 26 year supply for the replenishment of groundwater extracted for Project demand at full build-out.!"#$%&'()% % 0.(%

52 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# The remaining 204,500 acre feet of water to be provided under the Water Supply Agreement would be delivered to the proposed Project, primarily during wet periods, as and when water is available to RRB and MWD. This additional water would supply replenishment of groundwater extracted for Project demand, at full build-out, for an additional 92 years. Although the term of the Water Supply Agreement expires in 2035, the agreement provides for an extension of the term if the Kern County Groundwater modeling conducted by Dudek, as outlined in its Groundwater Study report, indicates that the hydrogeological characteristics of the SVGSB are adequate to support groundwater extraction to meet the demands associated with the proposed Project over extended periods pending the availability of imported water from RRB and MWD for replenishment, if and to the extent imported water supplies were interrupted by drought or other adverse conditions. Tables 4-1 through 4-3 reflect the water supplies available to the proposed Project during normal, single-dry, and multiple-dry year scenarios. Table 4-1: Project Water Supply and Demand for Paradise Valley Project during Normal Years S1&.#*!T%#&!'())*+!#/3!C%.#/3!A,0TB! (( 674K( 6767( 676K( 67G7( 67GK( 6757( 675K( "#$%&!'())*+!'1(&6%-! M+::1"$%(9%*'+;$'(b%*+,'W0-$%(2%*A( M<0#$%&(=011$.(b%*+,'W0-$%(M+PXZ0&",( 4/(6 ( (X((( (X((( (G66LK(( 4/78K( (6/4K7( (6/4K7(( 6/4K7(!$;.;1$'(>0-$% (G ( (X((( (X((( (64KL8(( (84E(( (4/5GF(( (4/5GF(( 4/5GF( N*-01(M+::1.( (X((( (X((( KGFL6( (4/8E5(( (G/KFF(( (G/KFF(( G/KFF( "#$%&!C%.#/3((! 90%0'"&$(=011$.(M:$;"2";(910,(c,-$%"*%( (X((( (X((( (6DELKK(( (FEFLK(( (4/8E8(( (4/8E8(( 4/8E8(?$A0,'( 90%0'"&$(=011$.(M:$;"2";(910,(TR-$%"*%(?$A0,'( (X((( (X((( (66FLG7(( 8D4( (4/K66( (4/K66(( 4/K66( b%*+,'w0-$%(n%$0-a$,-(?$a0,'( (X((( (X((( 57LGK(( (4G5LK(( (6DE(( (6DE(( 6DE( N*-01(?$A0,'( (X((( (X((( KGFL6( 4/8E5( (G/KFF(( (G/KFF(( G/KFF( (( (( (( (( (( (( (( ( O1$#*!'())*+!#/3!C%.#/3!C477%&%/6%!!W!!!!W!!! K! K! K! K! K! N*-01(90%0'"&$(=011$.(?$A0,'[N*-01( (( (( 477H( 477H( 477H( 477H( 477H( M+::1.(( ( ( 4(M=bMZ(-*(P$(%$:1$,"&<$'(W"-<("A:*%-$'()!>(-*(P$('$1"#$%$'(+,'$%(-<$(>0-$%(M+::1.(^J%$$A$,-(0,'( TR;<0,J$(^J%$$A$,-&(P$-W$$,(!!Z/()=>?(0,'(@>?L( 6(M=bMZ(<0&(6/D4F/777(^Q(*2(J%*+,'W0-$%(",(&-*%0J$(0,'(0(,0-"#$(J%*+,'W0-$%(%$;<0%J$(*2(867(^QaL( G(!$;.;1$'(W0-$%(&+::1.("&(P0&$'(*,(-*-01(:%*Y$;-(21*W&(0-(>>N9(!"#$%&'()% % 0.&

53 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 4-2: Project Water Supply and Demand for Paradise Valley During Single Dry Year '4/=*%!C&+!T%#&!'())*+!#/3!C%.#/3!A,0TB! (( 674K( 6767( 676K( 67G7( 67GK( 6757( 675K( "#$%&!'())*+!'1(&6%-! M+::1"$%(9%*'+;$'(b%*+,'W0-$%(2%*A( M<0#$%&(=011$.(b%*+,'W0-$%(M+PXZ0&",( 4/(6 ( (X((( (X((( (G66LK(( (4/78K( (6/4K7(( (6/4K7(( 6/4K7(!$;.;1$'(>0-$% (G ( (X((( (X((( (64KL8(( (84E(( (4/5GF(( (4/5GF(( 4/5GF( N*-01(M+::1.( (X((( (X((( (KGFL6(( (4/8E5( (G/KFF(( (G/KFF(( G/KFF( "#$%&!C%.#/3((! 90%0'"&$(=011$.(M:$;"2";(910,(c,-$%"*%( (X((( (X((( 6DELKK( FEFLK( (4/8E8(( (4/8E8(( 4/8E8(?$A0,'( 90%0'"&$(=011$.(M:$;"2";(910,(TR-$%"*%(?$A0,'( (X((( (X((( (66FLG7(( (8D4(( (4/K66(( (4/K66(( 4/K66( b%*+,'w0-$%(n%$0-a$,-(?$a0,'( (X((( (X((( (57LGK(( 4G5LK( (6DE(( (6DE(( 6DE(?$A0,'(N*-01( (X((( (X((( (KGFL6(( (4/8E5(( (G/KFF( (G/KFF(( G/KFF( (( (( (( (( (( (( (( ( O1$#*!'())*+!#/3!C%.#/3!C477%&%/6%!!W!!!!W!!! K! K! K! K! K! N*-01(90%0'"&$(=011$.(?$A0,'[N*-01( (( (( 477H( 477H( 477H( 477H( 477H( M+::1.(( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 4(M=bMZ(-*(P$(%$:1$,"&<$'(W"-<("A:*%-$'()!>(-*(P$('$1"#$%$'(+,'$%(-<$(>0-$%(M+::1.(^J%$$A$,-(0,'( TR;<0,J$(^J%$$A$,-&(P$-W$$,(!!Z/()=>?(0,'(@>?L( 6(M=bMZ(<0&(6/D4F/777(^Q(*2(J%*+,'W0-$%(",(&-*%0J$(0,'(0(,0-"#$(J%*+,'W0-$%(%$;<0%J$(*2(867(^QaL( G(!$;.;1$'(W0-$%(&+::1.("&(P0&$'(*,(-*-01(:%*Y$;-(21*W&(0-(>>N9(!"#$%&'()% % 0./

54 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Table 4-3: Water Supply and Demand for Paradise Valley during Multiple Dry Years \(*$4)*%!C&+!T%#&!'())*+!#/3!C%.#/3!A,0TB! (( 674K( 6767( 676K( 67G7( 67GK( 6757( 675K( "#$%&!'())*+!'1(&6%-! M+::1"$%(9%*'+;$'(b%*+,'W0-$%(2%*A( M<0#$%&(=011$.(b%*+,'W0-$%(M+PXZ0&",( 4/(6 ( (X((( (X((( (G66LK(( 4/78K( (6/4K7(( (6/4K7(( 6/4K7(!$;.;1$'(>0-$% (G ( (X((( (X((( 64KL8( 84E( (4/5GF(( (4/5GF(( 4/5GF( N*-01(M+::1.( (X((( (X((( (KGFL6(( (4/8E5(( (G/KFF( (G/KFF( G/KFF( "#$%&!C%.#/3((! 90%0'"&$(=011$.(M:$;"2";(910,(c,-$%"*%( (X((( (X((( (6DELKK(( (FEFLK(( (4/8E8(( (4/8E8(( 4/8E8(?$A0,'( 90%0'"&$(=011$.(M:$;"2";(910,(TR-$%"*%(?$A0,'( (X((( (X((( 66FLG7( 8D4( (4/K66(( (4/K66(( 4/K66( b%*+,'w0-$%(n%$0-a$,-(?$a0,'( (X((( (X((( (57LGK(( 4G5LK( (6DE(( (6DE(( 6DE(?$A0,'(N*-01( (X((( (X((( KGFL6( (4/8E5(( (G/KFF(( (G/KFF(( G/KFF( (( (( (( (( (( (( (( ( O1$#*!'())*+!#/3!C%.#/3!C477%&%/6%!!W!!!!W!!! K! K! K! K! K! N*-01(90%0'"&$(=011$.(?$A0,'[N*-01( (( (( 477H( 477H( 477H( 477H( 477H( M+::1.(( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 4(M=bMZ(-*(P$(%$:1$,"&<$'(W"-<("A:*%-$'()!>(-*(P$('$1"#$%$'(+,'$%(-<$(>0-$%(M+::1.(^J%$$A$,-(0,'( TR;<0,J$(^J%$$A$,-&(P$-W$$,(!!Z/()=>?(0,'(@>?L( 6(M=bMZ(<0&(6/D4F/777(^Q(*2(J%*+,'W0-$%(",(&-*%0J$(0,'(0(,0-"#$(J%*+,'W0-$%(%$;<0%J$(*2(867(^QaL( G(!$;.;1$'(W0-$%(&+::1.("&(P0&$'(*,(-*-01(:%*Y$;-(21*W&(0-(>>N9( Based upon the foregoing, the total projected water supplies available to CVWD for the proposed Project during normal, single dry and multiple dry water years during a 20-year projection will meet the projected water demand associated with the proposed Project. 4.1 CONCLUSIONS Based upon the information and analysis set forth in this WSA, the total projected water supplies available to CVWD during normal, single dry and multiple dry water years during a 20-year projection will meet the projected water demand associated with the proposed Pr existing and planned future uses, including agricultural and manufacturing uses.!"#$%&'()% % 0.0%

55 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 5.0 WATER SUPPLY VERIFICATION (WSV) 5.1 GENERAL The Paradise Valley Specific Plan residential development will be subject to the requirements of Senate Bill 221 pursuant to the Subdivision Map Act since more than 500 residential dwelling units are proposed for the project (8,490). 5.2 WATER SOURCE Project domestic water supplies and associated landscape irrigation supplies will be provided from groundwater. The Water Supply Verification (WSV) addresses: 1. Information included in CVWD's 2010 Coachella Valley Water Management Plan Update and the 2015 Urban Water Management Plan; 2. Issues related to groundwater recharge of non-groundwater sources, namely Colorado River 3. water and State Water Project water; and 4. Consideration of historical litigation regarding the Quantification Settlement Agreement. 5.3 SUPPORTING DOCUMENTATION adopted pursuant to Part 2.6 (commencing with Section 10610) of Division 6 of the Water Code.! Additionally, the Water Supply Verification provides confirmation that a sufficient water supply will be available to meet the projected demands associated with the proposed subdivision as required by subdivision (b) and is supported by substantial evidence that includes the WSA that was completed pursuant to Part 2.10 (commencing with Section 10910) of Division 6 of the Water Code. 5.4 FACTORS OF CAPABILITY General Government Code Section (a) requires that all of the following factors be considered: 1. The availability of the supply over 20 years; 2. The applicability of CVWD's Water Shortage Contingency Analysis; 3. The reduction of water supply to a specific user by ordinance or resolution; 4. The reasonable amount of groundwater supply that can be relied upon, considering it natural sources as well as the supporting recharge sources within agreements for Colorado River water and SWP water Historical Availability of Water Supply The Coachella Valley has been primarily dependent on groundwater as a source of domestic water for several decades. The 2010 CVWMP Update and the CVWD 2015 UWMP review the historical use of!"#$%&'()% % 1.(

56 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# water in the Coachella Valley. In 1936, groundwater use was 92,400 AFY. Current annual water use oximately 639,857 AF in year Deliveries of Colorado River water and MWD SWP transfer water assist in offsetting the groundwater use. The Colorado River water deliveries have averaged approximately 332,301 AFY over the past five years with MWD deliveries to the Coachella Valley expected to average over 60,000 AFY Water Shortage Contingency The CVWD developed its Water Shortage Contingency Plan during the drought pursuant to the requirements of the Government Code The key element of CVWD's water shortage contingency plan is an ordinance with phased water use restrictions and a drought-related rate structure. Table 21 Water Shortage Contingency Plan, provides the stages and action levels shown in Table 5-1. The trigger levels (to move from one stage to the next) depend on the Statewide and local water situation. Based on voluntary response during Stage 1, CVWD's General Manager-Chief Engineer can determine that it is necessary to implement Stage 2 to protect the public welfare and safety. Also, in the case of a State-wide water shortage declaration, the Governor can determine that it is necessary it implement Stage 2. Prior to the implementation of each mandatory phase, CVWD will hold a public hearing for the purpose of determining whether a shortage exists and which measures should be implemented. The public will be informed of the public hearing at least ten days prior to the hearing and CVWD will notify the public of its determination by public proclamations. Table 5-1: Water Shortage Contingency Plan "#$%&!'_1&$#=%!Q1/$4/=%/6+!2*#/! '$#=%!,6$41/! "#$%&!?-%!P%3(6$41/!@1#*! c( =*1+,-0%.( 47H( 47H( 67H( K7H(!"#$%&'()*+,(-+./(01213(4567&(89:;( On January 17, requested a voluntary 20 percent reduction in urban water use Statewide. At that same time he directed the State Water Resources Control Board (SWRCB) to adopt Emergency Regulations. As a result, on July 15, 2014, the SWRCB adopted Emergency Regulations for Statewide Urban Water Conservation. They became effective on July 28, 2014 and were codified in Title 23, Sections , of the California Code of Regulations. In April 2015, Governor Brown issued Executive Order B-29-15, mandating, for the first time in California history, a 25% statewide reduction in urban water use and directing the State Water!"#$%&'()% % 1.&

57 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Resources Control Board (SWRCB) to adopt Emergency Regulations to implement the Executive Order. Regulations that were put in place consisted of prohibited water uses such as: Watering landscapes within 48-hours of a measurable rainfall; Irrigation of ornamental turf in public street medians; Using a hose without a shut-off nozzle; and Applying water to outdoor landscapes in a manner that causes runoff. On April 7 of 2017, Governor Brown ended the drought State of Emergency in most of California, while maintaining water reporting requirements and prohibitions on wasteful practices such as watering during or right after rainfall. Executive Order B lifts the drought emergency in all California counties except Fresno, Kings, Tulare, and Tuolumne, where emergency drinking water projects will continue to help address diminished groundwater supplies. Executive Order B also rescinds two emergency proclamations from January and April 2014 and four drought-related Executive Orders issued in 2014 and The SWRCB's Emergency Regulations also mandated urban water suppliers like CVWD reduce their total potable water production by defined percentages. Under the Regulation, the conservation reductions for all urban water suppliers were allocated across nine tiers of increasing levels of residential water use to reach the statewide 25% reduction mandate. Agencies in Tier 9, including CVWD, having average residential water use above 215 GPCD, were mandated to reduce use by 36% compared to 2013 water use. In April 2016, CVWD's mandated reduction goal was revised to 32% based on the Coachella Valley's extremely dry climate. In response to the Governors Drought Declaration, Emergency Order, and the SWRCB's emergency regulations, CVWD adopted a Water Shortage Contingency Ordinance that included water use prohibitions, penalty rates and fines Reduction of Water Supply area, and would have its own water If approved, the Project will annex into CVWD and be subject to all CVWD water management Therefore, State Water Project and Colorado River Water supplies are discussed relative to the isting service area. C9R9R98 2%1)1-$3&2%17$6#=& The primary domestic water supply for the proposed Project is groundwater produced from the Shavers Valley Groundwater Sub-basin (SVGSB). The SVGSB contains approximately 2,618,000 acre feet of groundwater, 510,000 acre feet of which is located beneath the boundaries of the proposed Project (Dudek, Paradise Valley Groundwater Study, March 2016). Groundwater modeling estimates approximately 1,665,000 acre-feet of available water storage space in the SVGSB, of which 174,000 acre feet underlies the proposed Project.!"#$%&'()% % 1./

58 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# Groundwater use by the proposed Project will be replenished by Colorado River Water (CRW) obtained by CVWD via water exchange agreements between CVWD, the Rosedale-Rio Bravo Water District (RRB) and Metropolitan Water District (MWD). The project Applicant (GLC) entered into a Water Supply Agreement with RRB, under which RRB is obligated to deliver to CVWD, over a 30 year period, a minimum of 9,500 AFY and a maximum of er will be delivered to MWD via the California Aqueduct. Pursuant to exchange agreements between MWD and CVWD, MWD will accept delivery of the RRB water via the California Aqueduct and will, as available, deliver a like amount of CRW to CVWD via the Colorado River Aqueduct. The RRB Water Supply Agreement provides for total water deliveries of approximately 262,000 acre feet of water over the period from 2010 to GLC has assigned the RRB Water Supply Agreement to CVWD. As of December 2016, RRB has delivered 57,500 acre feet of the RRB water to MWD under the terms and conditions of the Water Supply Agreement, which MWD has in turn delivered to CVWD at water is -basin storage area and is in storage pending use by the proposed Project. This 57,500 acre feet of stored water alone constitutes a 26 year supply for the replenishment of groundwater extracted for Project demand at full build-out. CVWD expects to receive an additional 16,500 acre feet of water under the water supply agreement by the end of C9R9R9:?1"6L$**"&5"**$+&!"#$%&D4-#%46#=& CVWD's Colorado River Water rights and SWP Table A allotments will provide supplemental water for direct use and groundwater recharge to the Coachella Valley. CVWD proposes to develop direct treatment of Colorado River Water for potable uses in the future. The Coachella Valley Groundwater Basin has the capacity to meet future demands. Based on the information provided in the 2015 draft State Water Project Delivery Capability Report, CVWD's Colorado River Water rights, recycled water, desalinated drain water and CVWD's water conservation program, water supplies will be sufficient to meet the Project's demands and CVWD's existing and future demands. In the event that additional conservation and/or limitations are necessary, the Project would adhere to any and all limitations associated with this potential reduction in supply. In addition, the US Bureau of Reclamation (USBR) has developed interim surplus and shortage guidelines for management of the Colorado River Water supplies. The USBR preferred alternative provides flexibility for the potential storage of additional conserved Colorado River or non-colorado River Water in Lake Mead. The guidelines that were adopted by USBR have been updated and extended through The revised guidelines address the operation of Lake Mead at relatively full elevations, and determine when "surplus" water supplies would be available to water users in Southern California, including the Coachella Valley. As currently drafted, the guidelines indicate that water shortages will not negatively impact the Colorado River Water supply for the Coachella Valley. CVWD is part of the California agricultural agencies' Colorado River entitlement and is protected by over two million AF of Lower Basin Colorado River entitlement that has a lower priority. The lower priority water would be used to meet shortages before the agricultural entitlements would begin to be impacted.!"#$%&'()% % 1.0

59 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 5.5 IMPACTS TO OTHER PROJECTS The project's proposed landscape utilization of desert efficient, drought tolerant variety of trees, shrubs and groundcover, use of xeriscape species and the use of indoor water efficient devices (Watersense toilets, evapotranspiration-based irrigation controllers, buried in-line drip irrigation, etc.) constructed into each residential dwelling unit will attain the goals of the 2010 CVWMP Update by: Meeting current and future water demands with a 10 percent supply buffer; Contributing to the elimination of long term groundwater overdraft; Managing and protecting water quality with a project specific Water Quality Management Plan; Complying with state and federal laws and regulations; Managing future costs; Minimizing adverse environmental impacts. Therefore, the Paradise Valley Specific Plan project would not have a significant impact on agricultural, potable, or industrial users. In addition, this project would not affect the water supply for future low income housing projects. The proposed Project will comply with CVWD Landscape Ordinance The Project may be responsible for funding the purchase of additional imported water supplies to support its projected demands on the PWS. Based on the findings of the WSV, it is expected that the impacts to the groundwater basin are fully mitigated. 5.6 RIGHTS TO GROUNDWATER CVWD has the legal authority to manage the groundwater basins within its service area under the County Water District Law (California Water Code, Division 12). The Coachella Valley Groundwater Basin is not adjudicated. CVWD has the right to extract the groundwater as needed to supply this Project. 5.7 VERIFICATION This document provides verification that a sufficient water supply for this Project is available, as required by California Government Code Section !"#$%&'()% % 1.1

60 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# 6.0 REFERENCES: AECOM, 2013, Rosedale-Rio Bravo Water Storage District (RRBWSD) Groundwater Management Plan AECOM, 2016, Rosedale-Rio Bravo Water Storage District (RRBWSD) 2014 Groundwater Operations Plan Water Banking, Stanford Woods Institute for the Environment, delivered July 21, 2009 July 30, 2014 Coachella Valley Water District (CVWD), 2006, Resolution Annexation of Proposed Development Project and Potential Conjunctive Use Program in Shavers System Design Crit Coachella Valley Water District (CVWD), 2011a, 2010 Urban Water Management Plan Final Report, July 2011 Coachella Valley Water District (CVWD), 2011b, Coachella Valley Water Management Plan 2010 Update Administrative Draft Subsequent Program Environmental Impact Report (EIR), July 2011 Coachella Valley Water District (CVWD), 2012a, Coachella Valley Water Management Plan 2010 Update Final Report, January 2012 Coachella Valley Water District (CVWD), 2012b, Assignment Agreement between CVWD and GLC, July 10, 2012 Replenishment Assessment Mission Creek Sub-basin Area of Benefit , April 2014 Replenishment Assessment West Whitewater River Area of Benefit April 2015 Coachella Valley Water District (CVWD), 2016, 2015 Urban Water Management Plan Report, Final Draft, June 2, 2016 Coachella Valley Water Management Group (CVWMG), 2010, Coachella Valley Integrated Water Management Plan, December 2010 Crewdson, Robert A., An Evaluation of Long-Term Water Supply of the Rosedale -Rio Bravo Water Storage District. Sierra Scientific Services, Bakersfield, CA, November 20, Danielian Associates (Danielian), 2015, Draft Paradise Valley Specific Plan, February 2015!"#$%&'()% % 2.(

61 &!"#$%&'())*+&,--$--.$/#&01%&2"%"34-$&5"**$+&')$64046&2*"/&2%17$6# ater, Bulletin No. 118 Update Department of Water Resources (DWR), 2015, The State Water Project Draft Delivery Reliability Report 2015, December 2015 Department of Water Resources (DWR), 2016, Criteria for Bulletin State Water Project Operations Studies Dudek, Report Paradise Valley Groundwater Study, March 2016 ESA, 2008, Strand Ranch Integrated Banking EIR, July 2008 ESA, 2013, Stockdale Integrated Banking Project EIR Notice of Preparation, September 2013 Kern County Water Authority (KCWA), 2011, Integrated Regional Water Management Plan, November 2011 National Climate Data Center (NCDC), 2015, Monthly Climatological Summary, Chiriaco Summit Station, Accessed on March 16, 2015 from: Metropolitan Water District of Southern California (MWDSC), 2010, Regional Urban Water Management Plan, November 2010 Metropolitan Water District of Southern California (MWDSC), 2015, Regional Urban Water Management Plan, February 2016 Psomas, 2008, Water Supply Assessment, July 2008 Rosedale-Rio Bravo Water Storage District (RBWSD), 1997, Groundwater Management Plan Rosedale-Rio Bravo Water Storage District (RRBWSD), 2004, Memorandum of Understanding Regarding Operation and Monitoring of Rosedale-Rio Bravo Water Storage District Groundwater Banking Program, July 10, 2004 RRBWSD-GLC Water Supply Agreement, 2005, Water Supply Agreement between Rosedale-Rio Bravo Water Storage District and Glorious Land Company, April 12, 2005 Sierra Scientific Services, 2003, Long Term Water Supply Reliability, Rosedale-Rio Bravo Water Storage District, August 28, 2003 Sierra Scientific Services, 2004, GLC Water Supply Reliability Review, October, 2004 September 4, 2014!"#$%&'()% % 2.&

62 Appendix A Legal Agreements

63 RRB-GLC Water Supply Agreement

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113 RRB-GLC Water Supply Agreement First Amendment

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124 CVWD-GLC Annexation Agreement

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