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Home My WebLink About55C - WATER SUPPLY ASSESSMENT FOR MAINPLACEREQUEST FOR COUNCIL ACTION CITY COUNCIL MEETING DATE: DECEMBER 3, 2019 TITLE: ADOPT A RESOLUTION APPROVING THE WATER SUPPLY ASSESSMENT FOR THE MAINPLACE MALL PROJECT LOCATED AT 2800 NORTH MAIN STREET {STRATEGIC PLAN NOS. 3, 3; 5, 21 /s/Kristine Ri CITY MANAGER CLERK OF COUNCIL USE ONLY: APPROVED ❑ As Recommended ❑ As Amended ❑ Ordinance on 1"Reading ❑ Ordinance on 2ntl Reading ❑ Implementing Resolution ❑ Set Public Hearing For CONTINUED TO FILE NUMBER RECOMMENDED ACTION Adopt a resolution approving the Water Supply Assessment for the approved MainPlace Mall mixed -use project located at 2800 North Main Street. DISCUSSION In June 2016, the City of Santa Ana filed its 2015 Urban Water Management Plan (UWMP) (Exhibit 1) with the California Department of Water Resources in accordance with California Water Code Section 10610, et seq., which requires UWMPs be filed every five years. The UWMP, among its several functions, estimates water supply sufficiency by forecasting the City's water supply capacity and anticipated consumer water demand to ensure that available water supply will meet or exceed demand. UWMPs are point -in -time estimates that, by their nature, cannot fully capture future effects of large changes not yet known at the time the plan is developed. For this reason, California Water Code Section 10910 requires large projects be reviewed individually for water supply sufficiency by means of a Water Supply Assessment document. The City must concur that adequate water supply exists for residential development projects consisting of more than 500 dwelling units before development may proceed. At its regular meeting on June 18, 2019, the City Council approved a development agreement with MainPlace Shoppingtown, LLC, for the transformation of the MainPlace Mall located at 2800 North Main Street. The proposed redevelopment is a mixed -use project including up to 1,900 residential dwelling units and, therefore, requires a Water Supply Assessment. Staff has reviewed the project's Water Supply Assessment and has concluded that the City has adequate supply to service the project upon completion. Staff recommends that the City Council adopt a resolution approving this assessment (Exhibit 2). This is the third Water Supply Assessment prepared for the City Council's specific review and consideration since the completion of the UWMP. City staff will evaluate future Water Supply 55C-1 Resolution Approving the Water Supply Assessment for the MainPlace Mall Project Located at 2800 North Main Street December 3, 2019 Page 2 Assessments by adjusting the demand projections of the UWMP for the anticipated demand of this project to determine the unutilized water supply available for additional development. When the future revised 2020 UWMP is filed again, any current or projected water demand from this project will be incorporated in the new baseline consumer water demand projections. STRATEGIC PLAN ALIGNMENT Approval of this item supports the City's efforts to meet Goal #3 - Economic Development, Objective #3 (Promote a solutions -based customer focus in all efforts to facilitate development and investment in the community), and Goal #5 - Community Health, Livability, Engagement & Sustainability, Objective #2 (Expand opportunities for conservation and environmental sustainability). ENVIRONMENTAL IMPACT There is no environmental impact associated with this action. FISCAL IMPACT There is no fiscal impact associated with this action Fuad S. Sweiss, PE, PLS Executive Director Public Works Agency Exhibits: 1. City of Santa Ana 2015 Urban Water Management Plan — see link below: https://www.santa-ana.org/sites/default/files/Documents/urban water management plan.pdf 2. Assessment and Resolution 55C-2 Exhibit 1 can be found at: https://www.santa- ana.org/sites/default/files/Documents/urba n water management plan.pdf 55C-3 jmf 11/12/19 EXHIBIT 2 RESOLUTION NO. 2019-XXX A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SANTA ANA APPROVING THE WATER SUPPLY ASSESSMENT FOR THE PROPOSED MAINPLACE MALL MIXED -USE PROJECT LOCATED AT 2800 NORTH MAIN STREET WHEREAS, in accordance with California Water Code Sections 10910, 10912(a)(1), and 10912(a)(6), any development that is proposing a mixed -use project that includes a proposed residential development of more than 500 dwelling units requires the preparation and approval of a water supply assessment; and WHEREAS, the proposed MainPlace Mall Mixed -Use Project located at 2800 North Main Street is proposing development of a mixed -use project including up to 1,900 residential dwelling units; and WHEREAS, the proposed MainPlace Mall Mixed -Use Project therefore requires the preparation and approval of a water supply assessment pursuant to California Water Code Sections 10910 and 10912; and WHEREAS, the City of Santa Ana is the public water system that currently supplies and will supply water to the proposed MainPlace Mall Mixed -Use Project; and WHEREAS, the projected water demand associated with the proposed MainPlace Mall Mixed -Use Project was accounted for in the City of Santa Ana 2015 Urban Water Management Plan; and WHEREAS, the Water Supply Assessment for the MainPlace Mall Mixed -Use Project has been prepared; and WHEREAS, the findings from the Water Supply Assessment prepared for the MainPlace Mall Mixed -Use Project show that there is sufficient water supply available for the proposed MainPlace Mall Mixed -Used Project during normal, single -dry, and multiple dry years within a 20-year projection to meet the projected water demand of the Project in addition to the demand of existing and other planned future uses, including, but not limited to, agricultural and manufacturing uses. NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Santa Ana as follows: Section 1. The Water Supply Assessment for the MainPlace Mall Mixed -Use Project is hereby approved, a copy of which is attached as Exhibit A and will be on file at the offices of the Public Works Agency of the City for public inspection. Resolution No. 2019-XXX Page 7 of 3 55C-4 jmf 11/12/19 Section 2. Approval of the Water Supply Assessment by the City does not constitute a "will -serve" or in any way entitles the MainPlace Mall Mixed -Use Project to water service or to any right, priority or allocation in any supply, capacity or facility. Section 3. Approval of the Water Supply Assessment shall not affect the City of Santa Ana's obligation to provide service to its existing customers or any potential future customers, including this MainPlace Mall Mixed -Use Project. Section 4. This Resolution shall take effect immediately upon its adoption by the City Council, and the Clerk of the Council shall attest to and certify the vote adopting this Resolution. ADOPTED this day of 2019. APPROVED AS TO FORM: Sonia R. Carvalho, City Attorney By: 9A %V. John M. Funk Assistant City Attorney AYES: Councilmembers NOES: Councilmembers ABSTAIN: Councilmembers NOT PRESENT: Councilmembers Miguel A. Pulido Mayor Resolution No. 2019-XXX Page 2 of 3 55C-5 jmf 11/12/19 CERTIFICATION OF ATTESTATION AND ORIGINALITY I, DAISY GOMEZ, Clerk of the Council, do hereby attest to and certify the attached Resolution No. 2019-XXX to be the original resolution adopted by the City Council of the City of Santa Ana on Date: Clerk of the Council City of Santa Ana Resolution No. 2019-XXX Page 3 of 3 55C-6 EXHIBIT A MAINPLACE MALL TRANSFORMATION PROJECT Water Supply Assessment Prepared by: Kimley-Horn and Associates, Inc. 765 The City Drive, Suite 200 Orange, California 92868 April, 2019 Kimley>Morn Expect Mare. Ezpe,ienc. Belt.,. 55C-7 This Page Intentionally Left Blank 55C-8 City of Santa Ana TABLE OF CONTENTS MainPlace Mall Transformation Project Water Supply Assessment 1 INTRODUCTION...............................................................................................................................4 1.1 Background..............................................................................................................................4 1.1.1 Fashion Square Commercial Center Final EIR- 1983....................................................................4 1.1.2 Addendum to the Final EIRfor MainPlace/SantaAna —2000....................................................4 2 PROPOSED PROJECT DESCRIPTION...................................................................................................5 2.1 Project Location.......................................................................................................................5 2.2 Proposed Project......................................................................................................................5 3 Regulatory Setting...........................................................................................................................9 3.1 Purpose....................................................................................................................................9 3.2 Senate Bill 610 and 221............................................................................................................9 3.2 Water Conservation Act of 2009(SBx7-7)...............................................................................11 4 Water Setting................................................................................................................................12 4.1 City of Santa Ana Water Supply..............................................................................................12 4.2 Retail Water Supply................................................................................................................12 4.3 Water Rights/Groundwater Supply.........................................................................................13 4.4 Reliability of Water Sources...................................................................................................15 4.4.1 Normal -Year Reliability Comparison............................................................................................16 4.4.2 Single Dry -Year Reliability Comparison........................................................................................17 4.4.3 Multiple Dry -Year Period Reliability Comparison........................................................................17 4.5 City of Santa Ana Water Infrastructure...................................................................................18 4.5.1 Overall City Infrastructure............................................................................................................18 4.5.2 System Pressures..........................................................................................................................19 4.5.3 Local Project Infrastructure..........................................................................................................19 4.6 Project Water Demand........................................................................................................... 20 4.7 Water Shortage Contingency Plan..........................................................................................22 4.7.1 Demand Management Measures (DMM)...................................................................................23 Summaryand Conclusions.....................................................................................................................24 References............................................................................................................................................ 25 Kimley»)Horn 55C-9 Page ) i of Santa Ana TABLES MainPlace Mall Transformation Project Water Supply Assessment Table 1: Existing and Proposed Entitlement Summary ........................................... Table 2: Supply and Demand Comparison- Normal Year ....................................... Table 3: Supply and Demand Comparison- Single Dry -Year .................................... Table 4: Supply and Demand Comparison- Multiple Dry -Year ............................... Table 5: MainPlace Specific Plan - Current Proposal Water Demand ..................... Table 6: MainPlace Phased Development Pattern and Water Demand .................. Table 7: City Anticipated Water Demands with MainPlace and Civic Center Added Table 8: Water Shortage Contingency- Rationing Stages to Address Water Supply, Table 9: MainPlace Entitled Use Water Demand .................................................... FIGURES Figure 1: Regional Project Location from City of Santa Ana 2015 UWMP..................................... Figure 2: City of Santa Ana Water Service Area........................................................................... I Kimley»>Horn 55C-1 U Page I ii City of Santa Ana MainPlace Mall Transformation Project Water Supply Assessment LIST OF ABBREVIATED TERMS ac Acre ACP Asbestos Cement Pipe AF Acre -Foot or —Feet AFY Acre -Foot or —Feet per Year BEA Basin Equity Assessment BMP Best Management Practices BPP Basin Production Percentage CEQA California Environmental Quality Act CIP Capital Improvement Project DMM Demand Management Measures DWR Department of Water Resources FAR Floor Area Ratio gpcd gallons per capita per day gpd gallons per day gpm gallons per minute IS Initial Study Mgd Million Gallons per Day MWD Metropolitan Water District MWDOC Metropolitan Water District of Orange County OC Basin Orange County Groundwater Basin OCC County of Orange Civic Center Facilities Strategic Plan OCWD Orange County Water District PUE Public Utility Easement PRV Pressure Reducing Valve PSV Pressure Sustaining Valve RWQCB Regional Water Quality Control Board SB Senate Bill sf square feet UWMP Urban Water Management Plan WSA Water Supply Assessment Kimley»>Horn 55G-11 Page I iii City of Santa Ana 1 INTRODUCTION MainPlace Mall Transformation Water Supply Assessment MainPlace Mall has evolved over several decades from the original Fashion Square project approved in 1983, to the present mall of approximately 1,130,000 square feet (sf) of commercial uses. The site has not yet been developed to its full potential; existing entitlements allow for the additional development of up to 1,500,000 sf of office use, 400 hotel rooms, and additional commercial square footage. The MainPlace Specific Plan proposes changes to the approved land use plan, as discussed in the Proposed Project section of this Water Supply Assessment (WSA). 1.1 Background 1.1.1 Fashion Square Commercial Center Final EIR -1983 In 1983, the Santa Ana Fashion Square development consisted of an approximately 512,595-sf open-air retail mall on the site of the current MainPlace Mall. The Fashion Square Commercial Center Subsequent Final EIR was prepared to evaluate the potential impacts associated with rehabilitation and redevelopment of the site as a mixed -use commercial center with 1,600,000 sf of retail space, 1,500,000 sf of office space, and 1,200 hotel rooms. The Final EIR was certified by the City of Santa Ana in 1983. 1.1.2 Addendum to the Final EIR for MainPlace / Santa Ana — 2000 Addendum (ER 96-033) to the Environmental Impact Reportfor Proposed MainPlace/Santa Ana Expansion noted that the existing MainPlace Regional Shopping Center had approximately 1.1 million sf of leasable retail space. Subsequent entitlements in 2000 revised the allowed land uses approved in 1983. The Vesting Tentative Parcel Map approved in 2000 would allow up to 1,509,255 sf of retail, cinema, and restaurant uses; 1,500,000 sf of office uses; and 400 hotel rooms. KimleyoHorn Page 14 City of Santa Ana 2 PROPOSED PROJECT DESCRIPTION 2.1 Project Location MainPlace Mall Transformation Water Supply Assessment The approximately 49.04-acre project site is currently occupied by the existing MainPlace Mall in the City of Santa Ana. The project site location is shown in its regional setting on Figure 1, Local Vicinity. A site plan for the existing site is provided on Figure 2, Site Vicinity. The site is in the northern portion of the City and is generally bordered on the north by State Route 22 (SR-22 — the Garden Grove Freeway); on the south by MainPlace Drive and commercial development south of MainPlace Drive; on the east by Main Street; and on the west by Interstate 5 (1-5—the Santa Ana Freeway). Primary arterial access to the Specific Plan area is from Main Street, Town and Country Road, and Broadway, which provide accessto 1-5 and SR-22. Afour-lane perimeter access road, MainPlace Drive, serves as a ring road around the north, west, and south sides of MainPlace Mall, and connects to the surrounding street system in four locations. Land uses in the City vary from single family residential to heavy manufacturing. The site is located at the southeast quadrant of the Interstate 5/State Route 22 interchange. This area of Santa Ana is characterized by relatively dense urban development including a varied mix of commercial, office, and residential land uses. The project site is currently designated in the City's General Plan as District Center and existing zoning is General Commercial (C2), which includes a range of commercial uses as well as all of the uses allowed in the Community Commercial (C1) zone. Land uses surrounding the Specific Plan Area are predominantly large roadways and freeways and commercial uses, with limited residential in the vicinity. The Discovery Science Center is located approximately 800 feet to the south. 2.2 Proposed Project The total building area for MainPlace Mall is currently 1,130,000 sf of commercial / retail uses within an enclosed mall building. The existing mall is eight parcels based on recorded Parcel Map 99-152. There are 4,882 parking spaces in surface parking lots and 3 parking structures. The MainPlace Mall is currently entitled for the following additional development: • 379,255 sf of additional retail space (bringing the retail square footage to 1,509,255 sf); • 1,500,000 sf of office space; and • 400 hotel rooms. The applicant wishes to modify the entitlements to allow more flexibility in the further development of the site, reducing the allowed office and retail uses and adding residential uses. This diverse mixture of uses fulfills the purpose of the General Plan's District Center land use by adding residential uses in a mixed - use setting. The Proposed Project site plan is shown on Figure 3, Land Use Plan. As proposed, the Project would consist of the following additional development: • 270,000 sf of commercial (bringing the total commercial development to 1,400,000 sf); • 750,000 sf of office; • 400 hotel rooms; and Kinrley>Morn 55C-13 Page 15 of Santa Ana 1,900 multi -family residential units. Main Place Mall Transformation Project Water Supply Assessment Table 1 provides a comparison of the originally approved to the currently entitled to the proposed land use mix for the project site. Table 1: Main Place Mall Summary of Approved and Proposed Land Uses Land Use Originally Approved (1983) Currently Entitled (2000) Proposed Project Difference from Currently Entitled Commercial (sf) 1,600,000 1,509,255 1,400,000 (109,255) Office (sf) 1,500,000 1,500,000 750,000 (750,000) Hotel (rooms) 1,200 400 400 0 Residential (du) 10 0 1,900 1,900 sf = square feet; du = dwelling units Kimley)))Horn 55C-14 Page 16 of Santa Ana Main Place Mall Transformation Water Supply Assessment MWDOC Service Area and Member Agencies Figure 1: Regional Project Location from City of Santa Ana 2015 UWMP KimleyoHorn 55C-15 Page 17 City of Santa Ana MainPlace Mall Transformation Project Water Supply Assessment (,Itv of ;AntA Ana Lois �A s m N a Figure 2: City of Santa Ana Water Service Area �>Florn 55C-16 Page 18 of Santa Ana 3 Regulatory Setting 3.1 Purpose Main Place Mall Transformation Project Water Supply Assessment This Water Supply Assessment (WSA) has been prepared in conjunction with the California Environmental Quality Act (CEQA) review process to evaluate the sufficiency of the water supplies available to the water supplier to meet the existing and anticipated future demands associated with the proposed associated with the proposed MainPlace Mall Transformation Project (Main Place Project, or Proposed Project) during normal, single dry and multiple dry water years over a 20-year horizon.',' If the water supply is anticipated to be insufficient, the WSA must describe measures being taken to obtain an adequate supply.' This WSA contains information from the City's 2015 UWMP, Orange County Water Reliability Study, prepared by Municipal Water District of Orange County (MWDOC) and information produced by the Metropolitan Water District (MWD) concerning the watersupplies delivered from the State Water Project. 3.2 Senate Bill 610 and 221 California Public Resources Code, Section 21151.9 and California Water Code, Sections 10631, 10657, 10910, 10911, 10912, and 10915 (herein referred to as SB 610), and California Business and Professions Code, Section 11010 and California Government Code, Sections 65867.5, 66455.3, and 66473.7 (herein referred to as SB 221) require cities and counties to obtain, use in the project approval process, and provide to the public certain critical information concerning water supply. SB 610 amended State law to improve the link between information on water supply availability and certain land use decisions made by cities and counties. It requires land use planning entities (in this case, the City of Santa Ana [City]) to request an assessment of the availability of water supplies from the water supply entity that would provide water to a project when a project is considered a "water -demand project" as defined in Section 15155, Water Supply Analysis, of the State CEQA Guidelines (14 California Code of Regulations [CCR]). In summary, a "water -demand project" is a residential development with more than 500 dwelling units (du); a shopping center or business establishment employing more than 1,000 persons or having more than 500,000 sf; a commercial office building employing more than 1,000 persons or having more than 250,000 sf; a hotel or motel or both with more than 500 rooms; an industrial, manufacturing, processing plant, or industrial park for more than 1,000 persons and occupying more than 40 acres of land or having more than 650,000 sf, a mixed -use project that includes one or more of the above; or a project that would require water equivalent to or greater than the water demand of a 500 du project. I Public Resources Code §21080 ' Water Code §10910(c)(3) 3 Water Code §10910(c)(4) Kimley»>Horn 55C-1 7 Page 19 of Santa Ana CEQA Guidelines Section 15155(f) states: Main Place Mall Transformation Project Water Supply Assessment (f) The degree of certainty regarding the availability of water supplies will vary depending on the stage of project approval. A lead agency should have greater confidence in the availability of water supplies for a specific project than might be required for a conceptual plan (i.e. general plan, specific plan). An analysis of water supply in an environmental document may incorporate by reference information in a water supply assessment, urban water management plan, or other publicly available sources. The analysis shall include the following: (1) Sufficient information regarding the projects proposed water demand and proposed water supplies to permit the lead agency to evaluate the pros and cons of supplying the amount of water that the project will need. (2) An analysis of the reasonably foreseeable environmental impacts of supplying water throughout all phases of the project. (3) An analysis of circumstances affecting the likelihood of the water's availability, as well as the degree of uncertainty involved. Relevant factors may include but are not limited to, drought, salt -water intrusion, regulatory or contractual curtailments, and other reasonably foreseeable demands on the water supply. (4) If the lead agency cannot determine that a particular water supply will be available, it shall conduct an analysis of alternative sources, including at least in general terms the environmental consequences of using those alternative sources, or alternatives to the project that could be served with available water. SB 221 requires cities and counties to include (as a condition in any tentative map that includes a subdivision involving more than 500 du, a requirement to obtain a written verification from the applicable public water system or, where there is no existing water supplier, from a consultant directed by the city or county, that sufficient water supplies are available for the subdivision. Like SB 610, SB 221 also addresses the issue of land use and water supply, but at a different point in the planning process than does SB 610. Section 66473.7(b)(1) of the California Government Code requires a city or county to condition approval of a tentative tract map upon "a requirement that sufficient water supply be available" and requires verification priorto approval of the final tract map. The proposed Project includes a tentative tract map that meets the thresholds of SB 221. Further, a development agreement that includes a subdivision, as defined in Section 66473.7 of the California Government Code, cannot be approved unless the development agreement provides that any tentative map prepared for the subdivision will comply with the provisions of Section 66473.7 and includes a subdivision requirement that a sufficient water supply shall be available. Therefore, the Project would be required to comply with SB 221. For projects that include tentative tract maps involving over 500 du, SB 221 requires that the retail water purveyor (or if there is none, the planning agency) verify that the water system operator that would supply the project with water has a sufficient water supply to serve the proposed project and all other existing and planned future uses, including agricultural and industrial uses, in its area over a 20-year period, even in multiple dry years. The verification must look at (1) the history of water availability over at least the KimleyoHorn 55 -18 Page 110 of Santa Ana Main Place Mall Transformation Project Water Supply Assessment previous 20 years; (2) the proposed supplier's urban water shortage contingency analysis; (3) reductions due to existing commitments of its supply; and (4) how much water the supplier can reasonably expect from other water supply projects, such as conjunctive use, recycled water programs, conservation, and water transfers from other areas. SB 221 is intended as a "fail safe" mechanism to ensure that collaboration on finding the needed water supplies to serve a new large subdivision occurs before construction begins. Cities and counties have an obligation to ensure that proposed developments (1) use water as efficiently as possible; (2) include reliable sources of sufficient water supply; and (3) accommodate growth in a sustainable fashion that minimizes conflicts with other demands on the State's source water resources. 3.2 Water Conservation Act of 2009 (SBx7-7) As an urban retail water supplier, the City is subject to the Water Conservation Act of 2009. The Act requires the State to reduce per -capita water consumption through a series of varying methodologies. The statute requires that urban water suppliers use one of the following four methods to determine their urban water use target: • Method 1: 80% of Base Daily Per Capita Water Use Value • Method 2: Performance Standards • Method 3: 95% of the Hydrologic Region 2020 Target Value • Method 4: Water Savings (developed by DWR) To meet this requirement, the City of Santa Ana has chosen Method 3: 95% of the Hydrologic Region 2020 Target Value as its compliance methodology. Under Compliance Option 3, to achieve 95 percent of the South Coast Hydrologic Region target as set forth in the State's 20x2020 Water Conservation Plan, the City's 2015 target is 123 gallons per capita per day (gpcd) and the 2020 target is 116 gpcd. The 2015 target is the midway value between the 10-year baseline and the confirmed 2020 target. In addition, the confirmed 2020 target must meet a minimum of five percent reduction from the five-year baseline water use. In this case, the confirmed 2020 target is the five percent reduction from the five-year baseline. The City's actual 2015 gpcd was 82, substantially lower than the 2015 and 2020 targets. In addition to its individual SBx7-7 requirements, the City is also a member of the Orange County 20x2020 Regional Alliance formed by MWDOC. This regional alliance is 29 retail agencies in Orange County as described in MWDOC's 2015 UWMP. MWDOC provides assistance in the calculation of each retail agency's baseline water use and water use targets. In 2015, the regional baseline and targets were revised to account for any revisions made by the retail agencies to their individual 2015 and 2020 targets. The regional water use target is the weighted average of the individual retail agencies' targets (by population). The Orange County 20x2020 Regional Alliance weighted 2015 target is 176 gpcd and 2020 target is 158 gpcd. The actual 2015 water use in the region is 125 gpcd, i.e. the region has already met its 2020 gpcd goal. Kimley»)Horn 55C-19 Page ) 11 of Santa Ana 4 Water Setting MainPlace Mall Transformation Project Water Supply Assessment The following information is taken mainly from the 2015 UWMP and is the latest information available. 4.1 City of Santa Ana Water Supply The City of Santa Ana Water Department service area covers approximately 100 percent of the City and a small portion of the neighboring City of Orange. Its two combined sources of water supply are local groundwater contained in the Lower Santa Ana River Groundwater Basin, also known as the Orange County Groundwater Basin (OC Basin), which is managed by the Orange County Water District (OCWD) and imported water from MWD. In 1933, the OCWD was formed by a special act of the State Legislature to manage Orange County's groundwater supply and protection of the County's rights to water in the Santa Ana River. In 1953, the City became a member of OCWD. There are 21 water wells serving the City. Additionally, there are 10 reservoirs with a combined capacity of 49.3 million gallons. Currently, the City relies on approximately 71 percent groundwater, 28 percent imported water, and 1 percent recycled water. The City's water supply portfolio is expected to change slightly to 70 percent groundwater, 29 percent imported water, and 0.7 percent recycled water by the year 2040. 4.2 Retail Water Supply Retail water in the City of Santa Ana is purchased through MWD which obtains water from several sources, including local groundwater, surface water, recycled water and water supplied through the State Water Project and Colorado River Aqueduct. The State Water Project is a series of reservoirs, aqueducts and pumping facilities that transport water from Northern California to Southern California. The City maintains seven imported water connections to receive water through MWD's Orange County and East Orange County Feeder pipelines. Seven metered connections with a total capacity of 60,580 gallons per minute (gpm) transfer water into the City's distribution system. MWD's principal sources of water are the Colorado River via the Colorado River Aqueduct and the Lake Oroville watershed in Northern California through the State Water Project. The water obtained from these sources is treated at the Robert B. Diemer Filtration Plant located north of the City of Yorba Linda. Typically, the Diemer Filtration Plant receives a blend of Colorado River water from Lake Mathews through the MWD Lower Feeder and State Water Project water through the Yorba Linda Feeder. The City currently maintains seven imported water connections to the MWD system. Section 3.2.1 of the UWMP describes MWD's rights to Colorado River water, the forecasted supply and demand of Colorado River water, and management principles under consideration to better balance the supply and demand of Colorado River water. Section 3.2.2 of the UWMP describes the State Water Project that forms the second source of water for MWD. Policy and environmental factors affecting supply and reliability are listed. Storage is a major component of MWD's dry year resource management strategy. Sections 3.2.3 of the UWMP described Lake Oroville, the State Water Project's largest storage facility. Kimley»)Horn 55 -20 Page 112 City of Santa Ana MainPlace Mall Transformation Project Water Supply Assessment 4.3 Water Rights/Groundwater Supply The City uses pumped groundwater from the OC Basin, which underlies the northern half of Orange County beneath broad lowlands. The OC Basin, managed by OCWD, covers an area of approximately 350 square miles, bordered by the Coyote and Chino Hills to the north, the Santa Ana Mountains to the northeast, and the Pacific Ocean to the southwest. The OC Basin boundary extends to the Orange County - Los Angeles line to the northwest, where groundwater flows across the county line into the Central Groundwater Basin of Los Angeles County. The OC Basin's full volume is approximately 66 million acre- feet. Santa Ana currently meets 71 percent of its water demand through groundwater from the OC Basin. The OC Basin is not adjudicated and as such, pumping from the OC Basin is managed through a process that uses financial incentives to encourage groundwater producers to pump a sustainable amount of water. The framework for the financial incentives is based on establishing the basin production percentage (BPP): the percentage of each Producer's total water supply that comes from groundwater pumped from the OC Basin. Groundwater production at or below the BPP is assessed a Replenishment Assessment. While there is no legal limit as to how much an agency pumps from the OC Basin, there is a financial disincentive to pump above the BPP. Agencies that pump above the BPP are charged the Replenishment Assessment plus the Basin Equity Assessment (BEA), which is calculated so that the cost of groundwater production is greater than MWD's full service rate. The BEA can be increased to discourage production above the BPP. The BPP is set uniformly for all Producers by OCWD on an annual basis. The BPP is set based on groundwater conditions, availability of imported water supplies, and OC Basin management objectives. The supplies available for recharge must be estimated for a given year. The supplies of recharge water that are estimated are: (1) Santa Ana River storm flow; (2) natural incidental recharge; (3) Santa Ana River baseflow, (4) groundwater replenishment system supplies; and, (5) other supplies such as imported waterand recycled water purchased forthe Alamitos Barrier. The BPP is a major factor in determining the cost of groundwater production from the OC Basin for that year. In some cases, OCWD encourages treating and pumping groundwater that does not meet drinking water standards in order to protect water quality. This is achieved by using a financial incentive called the BEA Exemption. A BEA Exemption is used to clean up and contain the spread of poor quality water. OCWD uses a partial or total exemption of the BEA to compensate a qualified participating agency or Producer for the costs of treating poor quality groundwater. When OCWD authorizes a BEA exemption for a project, it is obligated to provide the replenishment water for the production above the BPP and forgoes the BEA revenue that OCWD would otherwise receive from the producer. The BPP is the primary mechanism used by OCWD to manage pumping in the OC Basin. In 2013, OCWD's Board of Directors adopted a policy to establish a stable BPP with the intention to work toward achieving and maintaining a 75 percent BPP by Fiscal Year (FY) 2015-16. Although BPP is set at 75 percent, based on discussions with OCWD a conservative BPP of 70 percent is assumed through 2040. Principles of this policy include: ■ OCWD's goal is to achieve a stable 75 percent BPP, while maintaining the same process of setting the BPP on an annual basis, with the BPP set in April of each year after a public hearing has been Kimley)))Horn 55C-21 Page 113 City of Santa Ana MainPlace Mall Transformation Water Supply Assessment held and based upon the public hearing testimony, presented data, and reports provided at that time. • OCWD endeavors to transition to the 75 percent BPP between 2013 and 2015 as construction of the GWRS Initial Expansion Project is completed. This expansion will provide an additional 31,000 AFY of water for recharging the groundwater basin. OCWD must manage the OC Basin in a sustainable manner for future generations. The BPP will be reduced if future conditions warrant the change. ■ Each project and program to achieve the 75 percent BPP goal will be reviewed individually and assessed for their economic viability. The OC Basin's storage levels are managed in accordance to the 75 percent BPP policy. It is presumed that the BPP will not decrease as long as the storage levels are between 100,000 and 300,000 (acre-feet) AF from full capacity. If the OC Basin is less than 100,000 AF below full capacity, the BPP will be raised. If the OC Basin is over 350,000 AF below full capacity, additional supplies will be sought after to refill the OC Basin and the BPP will be lowered. The OC Basin is managed to maintain water storage levels of not more than 500,000 AF below full condition to avoid permanent and significant negative or adverse impacts. Operating the OC Basin in this manner enables OCWD to encourage reduced pumping during wet years when surface water supplies are plentiful and increase pumping during dry years to provide additional local water supplies during droughts. OCWD determines the optimum level of storage for the following year when it sets the BPP each year. Factors that affect this determination include the current storage level, regional water availability, and hydrologic conditions. When the OC Basin's storage approaches the lower end of the operating range, immediate issues that must be addressed include seawater intrusion, increased risk of land subsidence, and potential for shallow wells to become inoperable due to lower water levels. The overall BPP achieved in the 2013 to 2014 water year within OCWD for non -irrigation use was 75.2 percent. However, a BPP level above 75 percent may be difficult to achieve. Therefore, a BPP ranging from 65 percent to 70 percent is currently being proposed for the ensuing FY 2015-16. Analysis of the OC Basin's projected accumulated overdraft, the available supplies to the OC Basin (assuming average hydrology) and the projected pumping demands indicate that this level of pumping can be sustained for 2015-16 without harming the OC Basin. BPP of 70 percent corresponds to approximately 320,000 AF of groundwater production including 22,000 AF of groundwater production above the BPP to account for several groundwater quality enhancement projects discussed earlier. In FY 2015-16, additional production of approximately 22,000 AF above the BPP will be undertaken by the City of Tustin, City of Garden Grove, Mesa Water District, and Irvine Ranch Water District. These agencies use the additional pumping allowance to accommodate groundwater quality improvement projects. As in prior years, production above the BPP from these projects would be partially orfully exempt from the BEA Page (14 Kimley>»Horn 55(;-22 City of Santa Ana MainPlace Mall Transformation Water Supply Assessment as a result of the benefit provided to the OC Basin by removing poor -quality groundwater and treating it for beneficial use. Annual groundwater basin overdraft, as defined in OCWD's Act, is the quantity by which production of groundwater supplies exceeds natural replenishment of groundwater supplies during a water year. This difference between extraction and replenishment can be estimated by determining the change in volume of groundwater in storage that would have occurred had supplemental water not been used for any groundwater recharge purpose, including seawater intrusion protection, advanced water reclamation, and the in -Lieu Program. The annual analysis of basin storage change and accumulated overdraft for water year 2013-14 has been completed. Based on the three -layer methodology, an accumulated overdraft of 342,000 AF was calculated for the water year ending June 30, 2014. The accumulated overdraft for the water year ending June 30, 2013 was 242,000 AF, which was also calculated using the three -layer storage method. Therefore, an annual decrease of 100,000 AF in stored groundwater was calculated as the difference between the June 2013 and June 2014 accumulated overdrafts. Several groundwater replenishment mechanisms are used in the OC Basin. Active recharge of groundwater began in 1949, in response to increasing drawdown of the OC Basin and consequently the threat of seawater intrusion. Section 3.3.3 of the UWMP outlines various groundwater recharge facilities. Section 3.3.4 of the UWMP describes an MWD program whereby MWD sells additional water to OCWD when excess surface water is available. This reduces the OC Basin pumping requirements. Section 3.3.5 of the UWMP describes an agreement for MWD to store its water in the OC Basin up to 66,000 AF. 4.4 Reliability of Water Sources Water supply reliability includes the pumped groundwater from the OC Basin, the availability of water purchased through MWD and the equipment that makes up the City's distribution system. Both City's potable water sources (OC Basin and MWD) are considered to be of high quality and reliable.° The OC Basin, the City's primary water source, is an actively, managed water source with significant recharge infrastructure and conservation programs in place. The City's secondary, alternative source is MWD. MWD's 2015 UWMP finds that MWD is able to meet, full -service demands of its member agencies starting 2020 through 2040 during normal years, single dry year, and multiple dry years. MWD's 2015 Integrated Water Resources Plan update describes the core water resources that will be used to meet full -service demands at the retail level under all foreseeable hydrologic conditions from 2020 through 2040. The foundation of MWD's resource strategy for achieving regional water supply reliability has been to develop and implement water resources programs and activities through its Integrated Water Resources Plan preferred resource mix. This preferred resource mix includes ° Water Code §10910(f)(5) KimleyoHorn 55C-23 Page 115 of Santa Ana Main Place Mall Transformation Water Supply Assessment conservation, local resources such as water recycling and groundwater recovery, Colorado River supplies and transfers, State Water Project supplies and transfers, in -region surface reservoir storage, in -region groundwater storage, out -of -region banking, treatment, conveyance and infrastructure improvements. Environmental, legal, and climate change factors were considered by MWD in its assessment. Water supply reliability also includes water quality considerations. Both MWD and OCWD monitor water quality extensively to manage water quality. Over 300,000 water quality tests are performed per year on MWD's water to test for regulated contaminants and additional contaminants of concern to ensure the safety of its waters. MWD's supplies originate primarily from the Colorado River Aqueduct and from the State Water Project. A blend of these two sources, proportional to each year's availability of the source, is then delivered throughout MWD's service area. Section 3.6.2.3.1 of the UWMP outlines MWD's water quality issues of concern. OCWD is responsible for managing the OC Basin. To maintain groundwater quality, OCWD conducts an extensive monitoring program that serves to manage the OC Basin's groundwater production, control groundwater contamination, and comply with all required laws and regulations. A network of nearly 700 wells provides OCWD a source for samples, which are tested for a variety of purposes. OCWD collects 600 to 1,700 samples each month to monitor OC Basin water quality. These samples are collected and tested according to approved federal and state procedures as well as industry -recognized quality assurance and control protocols. Section 3.6.2.3.1 of the UWMP outlines OCWD's water quality issues of concern. 4.4.1 Normal -Year Reliability Comparison The City has entitlements to receive imported water from MWD via the regional distribution system. Although pipeline and connection capacity rights do not guarantee the availability of water, per se, they do guarantee the ability to convey water when it is available to the MWD distribution system. All imported water supplies are assumed available to the City from existing water transmission facilities. The demand and supplies listed below also include local groundwater supplies that are available to the City through OCWD by a pre -determined pumping percentage. For the 2015 UWMP, the normal dry year was selected as the City's 2015 demand as shown in Table 2. Due to ongoing drought conditions within California and the increased implementation of water efficiency measures, 2015 was determined to represent an average water demand for this UWMP. KimleyoHorn 55 -24 Page 116 City of Santa Ana Main Place Mall Transformation Water Supply Assessment Table 2: Supply and Demand Comparison- Normal Year' 2020 2025 2030 2030 20402 Demand Totals 36,998 39,717 39,989 39,978 40,036 Groundwater Supply 25,899 27,802 27,992 27,985 28,025 MWD 10,799 11,615 11,697 11,693 11,711 Recycled Water 300 300 300 300 300 Difference 0 0 0 0 0 Note: units are in acre-feet per year(AFY). 1. City of Santa Ana 2015 UWMP, Table 3-4. 2. Projected values per the City of Santa Ana 2015 UWMP, Table 3-4 4.4.2 Single Dry -Year Reliability Comparison A Single -dry year is defined as a single year of no to minimal rainfall within a period that average precipitation is expected to occur. The City has documented that it is 100 percent reliable for single dry year demands from 2020 through 2040 with a demand increase of 6 percent using FY 2013-14 as the single dry -year. This percentage was determined by MWDOC based on historical data for all of its retail agencies through its "Bump Methodology." Table 3: Supply and Demand Comparison- Single Dry -Year' 2020 2025 2030 2030 1 20402 Demand Totals 39,218 42,100 42,388 42,377 42,438 Supply Total 39,218 42,100 42,388 42,377 42,438 Difference 0 0 0 0 0 Note: units are in acre-feet per year (AFY). 1. City of Santa Ana 2015 UWMP, Table 3-7 2. Projected values per the City of Santa Ana 2015 UWMP, Table 3-7 4.4.3 Multiple Dry -Year Period Reliability Comparison Multiple -dry years are defined as three or more years with minimal rainfall within a period of average precipitation. The City is capable of meeting all customers' demands with significant reserves held by MWD, local groundwater supplies, and conservation in multiple dry years from 2020 through 2040 with a demand increase of 6 percent using FY 2011-12 through FY 2013-14 as the driest years. MWDOC chose the highest average demand over a three-year period for the multi -dry year demand increase. This value was repeated over the three-year span as a conservative assumption where demand would increase significantly in a prolonged drought and would remain constant through the years. Kimley>»Horn 55 - 5 Page 117 City of Santa Ana MainPlace Mall Transformation Water Supply Assessment Table 4: Supply and Demand Comparison- Multiple Dry -Year' 2015 2020 2025 2030 20352 Supply Totals 39,218 42,100 42,388 42,377 42,438 Multiple Dry Year First Year Supply Demand Totals 39,218 42,100 42,388 42,377 42,438 Difference 0 0 0 0 0 Supply Totals 39,218 42,100 42,388 42,377 42,438 Multiple Dry Year Second Year Supply Demand Totals 39,218 42,100 42,388 42,377 42,438 Difference 0 0 0 0 0 Supply Totals 39,218 42,100 42,388 42,377 42,438 Multiple Dry Year Third Year Supply Demand Totals 39,218 42,100 42,388 42,377 42,438 Difference 0 0 0 0 0 Note: units are in acre-feet peryear (AFY). 1. City of Santa Ana 2015 UWMP, Table 3-8. 2. Projected values per the City of Santa Ana 2015 UWMP, Table 3-8. In all cases considered (normal year, single -dry year, and multiple dry -year), the available supply will meet projected demand due to diversified supply and conservation measures. 4.5 City of Santa Ana Water Infrastructure The City of Santa Ana (Water System Number CA3010038) owns and operates an extensive network of pipes, pumps, and reservoirs, delivering water to its service area. The UWMP and the City's 2017 Water Master Plan both describe the City's water infrastructure. 4.5.1 Overall City Infrastructure The City provided 36,656 AF of water to 44,610 municipal connections in 2015. The City maintains approximately 480 miles of transmission and distribution mains, 10 reservoirs with a cumulative storage capacity of 49 MG, seven pumping stations, 21 groundwater wells, four pressure regulating stations and seven import water connections. Portions of the City infrastructure are aged and require replacement. The Master Plan outlines recommended Capital Improvement Program (CIP) improvements. Fourteen of the City Wells pump into surface reservoirs with booster stations pumping the water into the distribution system. The remaining seven wells pump directly into the City's distribution system. Water pumped from all of the wells is naturally filtered as it passes through underlying aquifers of sand, gravel, and soil. This well water only requires disinfectant treatment for system distribution. The City maintains seven imported water connections to receive water through MWD's Orange County and East Orange County Feeder pipelines. Seven metered connections with a total capacity of 60,580 gallons per minute (gpm) transferwater into the City's distribution system. Kimley)»Horn 55 Page 118 of Santa Ana 4.5.2 System Pressures MainPlace Mall Transformation Project Water Supply Assessment The system supplies potable water to two pressure zones (High Zone and Low Zone) and consists seven booster pump stations, and four pressure reducing valve/pressure sustaining valve (PRV/PSV) stations. In general, the facilities are consolidated into several stations consisting of multiple groundwater wells, a storage reservoir, and a booster pump station. At each station, the wells pump groundwater to the storage reservoir and the booster pump station pumps the water from the storage reservoir to the distribution system. The system also includes several wells that pump directly into the distribution system with no storage reservoir or booster pump station. There are four PRV/PSV stations that allow flows from the High Zone to the Low Zone. 4.5.3 Local Project Infrastructure The City owns and maintains street and water infrastructure surrounding and within the MainPlace Mall site. Mainplace Drive surrounds the north, west, and east sides of the mall. In addition to Mainplace Drive, a public street, an on -site main private drive aisle that surrounds the all four sides of the mall is located immediately adjacent to the mall structure. The project site lies at the extreme north end of the City's water system. The City has water mains in the following locations: • A 16-inch asbestos cement pipe (ACP) in Main Street, terminating at the north leg of MainPlace Drive • A 16-inch ACP in the south leg of MainPlace Drive from Main Street to the southwest mall entry drive • A 12-inch ACP in the north leg of MainPlace Drive from Main Street to the north leg of the on -site private ring road. • A 16-inch ductile iron pipe under 1-5, connecting to the MainPlace Drive main at the southwest corner of the project site A 16-inch ACP in southwest private drive entry from MainPlace Drive to the on -site private ring road. This main is located in a public utility easement (PUE). • A 16-inch ACP in south private drive entry (the Broadway extension) from MainPlace Drive to the on -site private ring road. This main is located in a PUE. • A 12-inch ACP in the on -site ring road, looping around the project site. This main is located in a PUE. In addition to the mains, the City also has approximately 15 fire hydrants near the project site and approximately 24 water meters serving the site. The infrastructure adjacent to the project site was installed in the 1990s and is not identified for replacement in the 2017 Water Master Plan. The project site is located in the City's high-pressure zone and hydrant flows are in the highest category listed in the 2017 Water Master Plan. Kimley»)Horn 55 -27 Page 119 City of Santa Ana MainPlace Mall Transformation Water Supply Assessment 4.6 Project Water Demand The City of Santa Ana uses the following factors to determine water usage: • Single Family: 130 gpd/capita Multiple Family: 120 gpd/capita High -Rise Residential: 110 gpd/capita • Commercial Recreational (hotels/motels): 180 gpd/room • Commercial: 2,500 gpd/acre (Includes office and retail uses) • Industrial: 3,500 gpd/acre • Open Space / Parks / Landscape Areas: 3,000 gpd/acre Due to the nature and density of the Project, and the uncertainty of residential unit mix, per capita averages and per acre averages are less feasible to use for calculations. Also, since the commercial development on -site is more intense than a typical commercial site, as defined in the Santa Ana zoning ordinance, the commercial water demand factor should be adjusted. For the residential component of the Project, a demand factor of 190 gpd per multi -family unit is used in lieu of the City's standard per capita usage rate because the number of residents that would occupy units on the project site is unknown. The 190 gpd per multi -family unit demand factor is consistent with the demand factors in the MWDOC Orange County Water Reliability Study. The commercial water usage rate per acre is typically based on an assumed Floor Area Ratio (FAR). The City of Santa Ana General Plan Land Use Element identifies a baseline FAR for commercial development of 0.5. Because the City's typical FAR assumption does not reflect the commercial development intensity on the site, an "equivalent" Project acreage has been calculated based on the Project's proposed commercial (retail plus office) square footage. The adjusted (increased) acreage was multiplied by the 2,500 gpd/acre typical generation rate to account for the water usage associated with this level of project intensity. The existing mall square footage was subtracted from the equivalent acreage calculation because the existing mall's water usage and projected use was previously included in the baseline UWMP demands and is therefore not an additional demand. The equivalent acreage calculation is as follows: Total Retail: 1,400,000 sf total—1,113,000 sf existing mall = 287,000 additional sf Total Office: 750,000 sf Total Commercial Space: 750,000 sf+ 287,000 sf = 1,037,000 sf Equivalent Acreage: 47.6 acres Kimleyvftrn 55 Page 120 City of Santa Ana Table 5 identifies the Project's forecasted water demand. MainPlace Mall Transformation Water Supply Assessment Table 5: MainPlace Specific Plan — Proposed Project Water Demand Use Unit Number Demand Rate (gpd) Demand (gpd) Multi -family Residential Unit 1,900 190 361,000 Hotel Room 400 180 72,000 Commercial Acres 47.6 2,500 119,000 Total 552,000 (618 AFY) The Project will be phased overtime. Table 6 identifies the anticipated level of development on the project site between 2020 to 2040. Table 6: MainPlace Phased Development Pattern and Water Demand 2020 2025 2030 2035 2040 Incremental Development Percentage 10% 50% 40% 0% 0% Accumulative Development Percentage 10% 60% 100% 100% 100% Total Project Demand 62 AFY 371 AFY 618 AFY 618 AFY 618 AFY These Project demands are compared in Table 7 to the anticipated City demands and demands increases from 2020 to 2045. Other Water Supply Assessments prepared after the most recent UWMP must be included in this analysis, and the City provided Water Supply Assessments for three other Projects: the County of Orange Civic Center Facilities Strategic Plan (OCC), the 2525 N. Main Street Residential Development (AC 2525) project, and the Elks Site Mixed -Use Development at 1660 E. First Street Project (Elan). No other project WSAs outside of the three listed above were identified by the City. The project water demands are included in the table to determine if the combined demands of the OCC project, AC 2525 residential project, Elan residential project, and MainPlace Project are within the anticipated overall City demands. Kimley>»Horn 55G-29 Page 121 of Santa Ana MainPlace Mall Transformation Project Water Supply Assessment Table 7: City Anticipated Water Demands with MainPlace and Cumulative Projects Added 2020 2025 2030 2035 20401 UWMP SFR Demand 14,092 15,137 15,241 15,237 15,259 UWMP MFR Demand 10,405 11,177 11,254 11,251 11,267 UWMP Other Demand 12,033 12,925 13,014 13,010 13,030 UWMP Landscape Demand 148 158 160 160 160 UWMP Total Demand 36,678 39,397 39,669 39,658 39,716 UWM P Accumulative Demand 23 2,742 3,014 3,003 3,061 Total Project Demand 62 371 618 618 618 Total Civic Center Demand 158 385 576 770 770 Total AC 2525 Demand 133 133 133 133 133 Total Elan Demand4 195 195 195 195 195 Total Additional Demand (Project+three projects) 548 1,084 1,522 1,716 1,716 Comparison with Accumulative Demand -525 1,658 1,492 1,287 1,345 Note: units are in acre-feet peryear(AFY). UWMP = Urban Water Management Plan; SFR = single-family residential; MRF = multi -family residential 1. Projected values perthe City of Santa Ana 2015 UWMP, Table 2-4. 2. From OCC WSA. 3. From AC 2525 WSA (net increase). 4. From Elan WSA. In 2020, the combined demand of the OCC, AC 2525, Elan, and MainPlace projects would exceed the additional anticipated City demand by 525 AF. This exceedance is approximately 1.4 percent of the overall City demand in 2020. This increase can be considered negligible in the context of the overall City water demand. In the remaining 5-year periods through 2040, the combined demand of these projects is far less than the City's anticipated additional demand. Of note, the demands in the OCC WSA seem quite high compared to the 330,000 sf of net additional office space proposed. The OCC water demand is likely considerably overstated. 4.7 Water Shortage Contingency Plan The City is committed to reducing the net water demand during the times of drought or acts of nature, in accordance with SBx7-7. The City has adopted a Water Shortage Contingency Plan and Ordinance No. NS-2877 as part of its Municipal Code. Ordinance No. NS-2877 describes the measures that may be implemented in the event of a water shortage, including different stages of action corresponding to different levels of drought. Kimley>»Horn 55C-30 Page 122 City of Santa Ana MainPlace Mall Transformation Project Water Supply Assessment Table 8: Water Shortage Contingency- Rationing Stages to Address Water Supply' Stage No. Water Supply Conditions % Shortage Phase 1 A Phase 1 Water Shortage applies during times of regional drought Shortage when, in the spirit of cooperation, the City desires to assist in overall Up to 10% water conservation and water consumption reduction Phase 2 A Phase 2 Water Shortage applies during times of regional drought Shortage when, in the spirit of cooperation, the City desires to assist in overall Up to 20% water conservation and water consumption reduction A Phase 3 Water Shortage Emergency applies during times of Phase 3 regional drought when, in the spirit of cooperation, the City desires Shortage to assist in overall water conservation and water consumption Up to 50% reduction 1. City of Santa Ana 2015 UWMP, Table 5.2.1 4.7.1 Demand Management Measures (DMM) The Santa Ana Water Utility Division, in collaboration with MWD, works to develop water conservation techniques to reduce the total potable water demand throughout the City and the greater area. In total there are 15 required Demand Management Measures (DMMs) within the City. The DMM list located in the CitVs 2015 UWMP and includes Best Management Practices (BMPs) for areas such as: operations, educational programs, residential surveys, incentive programs, efficient water saving unit replacement programs, and more applicably incentives for commercial and industrial uses.' The complete listing of DMMs follows: • No washing down hard or paved surfaces • Limit on watering hours • Re -circulating water required for water fountains and decorative water features • Drinking water served upon request only • Limits on washing vehicles Commercial lodging establishments must provide guests option to decline daily linen services • Restaurants required to use water conserving dish wash spray valves • Obligation to fix leaks, break, or malfunctions No installation of single pass cooling systems Commercial car wash systems • No excessive water flow or runoff No installation of non -recirculating water systems in commercial car wash and laundry systems No watering during or within 48 hours of measurable rainfall 5 City of Santa Ana 2015 UWMP, Chapter 6. Kimley>))Horn 55C-31 Page 123 of Santa Ana Main Place Mall Transformation Project Water Supply Assessment • No irrigation of ornamental turf on public street medians with potable water • Limit on irrigation with potable water of landscapes outside of new construction Summary and Conclusions The City's combined potable water system's existing and future water supplies during average/normal, single dry and multiple dry water conditions over a 20-year projection will meet the projected water demand associated with the Proposed Project, in accordance with California Water Code Section 10910 et seq., Government Code section 66473.3 and other applicable statutes. The City's variety of water supply sources and conservation measures play a key role in its continued ability to provide its residents and businesses with a reliable water supply. The proposed Specific Plan uses add 618 AFY of demand at buildout. Since the City has planned for significant additional demand from 2025-2040, the proposed uses associated with the Project will not negatively impact the City's ability to supply water to its service area. The Proposed Project would increase the City's total potable water demand by less than 2 percent. As shown in Table 7, under normal conditions, the City has more than adequate water supplies to meet all anticipated demands for the Proposed Project. During a single dry year, additional water would be recovered from groundwater storage and MWD surplus supplies, and the City would continue to have more than adequate water supplies. Despite Southern California's current drought conditions and anticipated drought conditions in the future, the Projects water supply is secure and not in flux. Kimley>>Horn 55 -32 Page , 24 City of Santa Ana MainPlace Mall Transformation Water Supply Assessment References City of Santa Ana Draft 2015 Urban Water Management Plan. Arcadis, U.S., Inc. City of Santa Ana 2017 Water Master Plan. Tetra Tech. Municipal Water District of Orange County, Orange County Water Reliability Study. CDM Smith County of Orange Civic Center Facilities Strategic Plan Water Supply Assessment, Tetra Tech Kimley>))Horn 55C-33 Page 1 25