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SB610 Water Supply AssessmentVALLCO AREA SPECIFIC PLAN SB610 WATER SUPPLY ASSESSMENT CUPERTINO, CALIFORNIA DRAFT MAY 21, 2018 Prepared by: Yarne & Associates, Inc. For California Water Service Los Altos Suburban District 949 B Street Los Altos, CA 94024 TABLE OF CONTENTS Introduction and Project Description 3 Vallco Area Specific Plan Water Demand 6 LAS District Background Information 11 LAS District Water Demand LAS District Water Supply 15 27 Supply Adequacy and Reliability Assessment 33 Climate Change 39 Summary and Conclusion 40 References 41 2 Introduction and Project Description California Water Service (Cal Water) has prepared this California SB 610 Water Supply Assessment (WSA) for the Vallco Area Specific Plan (hereafter referred to as "Vallco ASP") The Los Altos Suburban (LAS) district of Cal Water provides potable water service to all customers within the proposed development area of the Vallco ASP. The Vallco ASP covers approximately 70 acres of which 58 acres are developable. The developable area is located on both sided of North Wolf Road between Vallco Parkway and Interstate 280 on the east side and between Stevens Creek Blvd and Vallco Parkway on the west side of the City of Cupertino. Most of the project area is comprised of the existing Vallco Shopping Mall parking areas, roadways and a hotel under construction which is considered to be part of the ASP. Attached are City of Cupertino Notice of Preparation Figure 2 (vicinity map) and Notice of Preparation Figure 3 (aerial photo of the existing site and surroundings). The existing Vallco Shopping Center is a regional shopping mall of 1,199,699 square feet (ft) of retail, restaurant and recreational uses. The existing mall has experienced a significant decline in occupancy during the past several years resulting in a lower occupancy rate. Major anchor tenants including Sears and Macy's closed their stores in the mall. In May 2015, 796,527 ft2 or 66.4% of available space was occupied and 403,172 ft2 or 33.6% of space was vacant. For purposes of determining new water demand associated with the Vallco ASP, the occupancy rate for May 2015 is used to determine existing water use since that demand was part of the total Los Altos Suburban (LAS) District demand in the 2015 LAS District Urban Water Management Plan (UWMP). Following are the facilities for the "Proposed Project" for the Vallco ASP as of April 23, 2018: Commercial - 600,000 sq ft which includes: Retail — 420,000 sq ft Recreation Uses: Movie Theatre, Bowling Alley, Ice Rink 180,000 sq ft 2. Office - 2,000,000 sq ft 3. Hotel — 339 rooms 4. Residential - 800 dwelling units 5. Civic Area — 65,000 sq ft including 10,000 sq ft for STEM Lab 6. Green Roof and Ground Landscaping — 36.06 acres total comprised of 5.6 acres ground surface landscaping and 30.46 acres of green roof landscaping. The green roof would cover and cross over the tops of the buildings on-site and come to the existing grade at the western boundary of the project site at Stevens Creek Boulevard. It would include landscaping and active and passive open spaces. Following are the proposed facilities for the alternative described as "General Plan Build -out with Maximum Residential Density" 1. Commercial - 600,000 sq ft which includes: Retail — 420,000 sq ft Recreation Uses: Movie Theatre, Bowling Alley, Ice Rink —180,000 sq ft 2. Office -1,000,000 sq ft 3. Hotel — 339 rooms 4. Residential — 2,640 dwelling units 5. Civic Area — 65,000 sq ft including 10,000 sq ft for STEM Lab 6. Green Roof and Ground Landscaping — 36.06 acres total — same as Proposed Project Following are the proposed facilities for the alternative described as "Retail and Residential Alternative" 1. Commercial - 600,000 sq ft which includes: Retail — 420,000 sq ft Recreation Uses: AMC Theatre, Bowling Alley, Ice Rink — 180,000 sq ft 2. Office — 0 sq ft 3. Hotel — 339 rooms 4. Residential — 4,000 dwelling units 5. Ground Landscaping — 5.6 acres Following are the proposed facilities for the alternative described as "Occupied/Re-Tenanted Mall" 1. Commercial —1,207,774 sq ft which includes: Retail — 1,189,774 sq ft Recreation Uses: AMC Theatre, Bowling Alley, Ice Rink — 180,000 sq ft 2. Office — 0 sq ft 3. Hotel —148 rooms 4 4. Residential — 0 dwelling units 5. Ground Landscaping — 5.6 acres Construction of the Vallco ASP is estimated to start in the first quarter of 2019. All facilities are estimated to be constructed and in use 10 years later or in the first part of 2029. The Vallco ASP is not specifically covered in Cal Water's LAS District 2015 UWMP; therefore, its water supply requirements are addressed in this WSA. The 2015 UWMP is based on data up to 2015 and is the most recent UWMP; however, water demand data for 2016 — 2017 were obtained and used in the WSA. The 2015 LAS District UWMP can be referenced for more detailed information on historic and forecasted water demand and supply and other related topics. Senate Bill 610 (Chapter 643, Statutes of 2001) (SB 610) amended state law as of January 1, 2002, to include consideration of water supply availability when cities and counties are making land use development decisions. SB 610 requires detailed information on water supply availability be provided to local public agency decision -makers prior to approval of development projects that meet or exceed any of the following criteria: 1. A residential development of more than 500 dwelling units. 2. A shopping center or business establishment employing more than 1,000 persons or having more than 500,000 square feet. 3. A commercial office building employing more than 1,000 persons or having more than 250,000 square feet of floor space. 4. A hotel or motel with more than 500 rooms. 5. An industrial, manufacturing or processing plant or industrial park planned to house more than 1,000 persons occupying more than 40 acres of land or having more than 650,000 square feet of floor area. 6. A mixed -used project that includes one or more of the projects specified above. 7. A project that would demand an amount of water equivalent to, or greater than, the amount of water required by a 500 dwelling unit project. Because the proposed Vallco ASP exceeds criteria 1, 2, 3 and 6 above, a WSA is required. The WSA assesses the adequacy of the water supply to meet the estimated demands of the proposed Vallco ASP over the next 20 years and those of Cal Water's LAS District customers and projected new users under normal, single dry year and multiple dry year conditions. (Water Code § 10911(a)). SB 610 requires that the information presented in a WSA be included in the administrative record that is the basis for an approval action by the local public agency. SB 610 recognizes local control and decision-making regarding availability of water for projects and approval of projects. A WSA is to be provided to local governments for inclusion in environmental documentation for projects subject to the California Environmental Quality Act (as defined in Water Code 10912 [a]). Vallco Area Specific Plan Water Demand Forecasting net new water demand for the Vallco ASP is generally based on multiplying the estimated water use on a gallons per day per square foot (gpd/ft2) basis for non-residential use categories by the new square footage for each category and summing the total. For residential single family and multi -family categories, water demand is based on LAS District residential use data. Cal Water has used historic water use data by user classes to develop estimates of water demand for various projected development uses. Due to implementation of more aggressive water conservation practices and requirements, historic unit water use factors are viewed as being higher than the water use factors projected for new developments in 2018 and beyond. Accordingly, the method used here was to: 1. Estimate water demand of existing uses 2. Estimate water demand of proposed new development based on newer water conservation requirements for toilets, showers, dishwashers, washing machines and outdoor landscaping and irrigation systems. 3. Determine the net increase in project water demand by subtracting existing demand from estimated new development demand. Following are water use factors by user categories historically experienced by Cal Water: Fe Dry goods stores: Commercial offices: Restaurants (food service): Supermarkets and food stores: Average Water Use Factors 2ud/ft2 0.110 & Entertainment: 0.05 1.10 1.10 0.55 US Census Bureau data for 2010 obtained by Cal Water indicate that the number of multi -family dwelling units in the LAS District was 8,517. The total water demand for multi -family services in 2010 was 656 AFY. Therefore, the water use factor is 0.077 AFY/dwelling unit or 68.7 gpd/dwelling units. Estimated Existing Average Daily Water Use in the Vallco Shopping Mall: A breakdown of available space by user category for the existing shopping center is not available; therefore, the following assumptions are made: Dry goods stores: 80% x 796,527 ft2 = 637,222 ft2 Restaurants and food stores: 15% x 796,527 ft2 = 119,479 ft2 Commercial offices: 5% x 796,527 ft2 = 39,826 ft2 6 Estimated Existing Building Water Use: Dry goods stores: 637,222 ft2 x 0.110 gpd/ft2 = 70,094 gpd Restaurants and food stores: 119,479 ft2 x 1.10 gpd/ft2 = 131,427 gpd Commercial offices: 39,826 ft2 x 0.05 gpd/ft2 = 1,991 gpd Total Estimated Existing Building Average Daily Water Use: 203,512 gpd Estimated Existing Landscape Irrigation Water Use: Metered data for only landscape irrigation in the LAS District is not available. In nearby Cal Water districts, irrigation usage for parks and landscaped areas ranges from 3.0 — 4.0 AFY per acre. For a park area in San Mateo, metered sales records for two existing parks for 34 months yielded an irrigation rate of 3,615 gallons per day/acre or 4.05 AFY per acre. For commercial office landscaping in South San Francisco for one year period, total landscape irrigation water use was 7,219,192 gallons for an area of 250,143 square feet. Therefore, average daily irrigation water use was: 0.079 gallons/day/ft2 or 3.85 AFY per acre. Both of these irrigations rates were for non -drought periods and conventional irrigation methods. For the existing Vallco Shopping center site, a lower application rate of irrigation water is assumed due to the 5 years of drought (2012, 2013, 2014, 2015and 2016) or 3 AFY per acre or 2,676 gpd/acre. Based on an aerial photo, it is estimated that there are 4.7 acres of landscaped areas. Therefore, estimated existing irrigation water use is 2,676 gpd/acre x 4.7 acres = 12,577 gpd. Estimated Existing Total Shopping Center Area Water Use: 203,512 gpd + 12,577 gpd = 216,089 gpd Estimated Water Use for the Proposed Project: The Proposed Project will replace facilities with buildings that will fully comply with more stringent and current city water conservation requirements including the California Plumbing Code and the California Green Building Code, which mandate installation of water conserving plumbing fixtures and fittings. Existing water use in the Vallco Shopping Center is based on higher historic water use rate data (gpd/ft2). It is estimated that new Proposed Vallco ASP facilities will achieve a reduction in water use rates of 25%. For example, old toilets often exceed 2 gallons per flush. Later toilets use 1.6 gallons per flush. The latest water efficient toilets use only 0.6 gallons per flush. Depending on the reference toilet, the latest toilets achieve 62.5% to 70% reduction in water use. In residential dwelling units, new dishwashers will be installed which use less water than older conventional machines, which use between 7 and 14 gallons per wash load. New water efficient dishwaters use between 4.5 and 7 gallons per wash load. Using an average of 10.5 gallons for conventional dishwashers and 5.75 gallons for new water efficient dishwashers results in an average savings of 4.75 gallons per load or a reduction of 45%. Showers with restricted flow heads have an average flow rate of 2.0 gallons per minute (gpm) versus conventional shower head flows of 2.5 gpm or a 20% reduction. Washing machines 18 years or older used 40 gallons per standard load versus new machines using only13 gallons per load or a reduction of 67.5%. Commercial Uses (600,000 ft2 1) Retail (420,000 ft2): Assume 80% of space is dry goods and 20% is restaurants and food stores Therefore the average water use rate is: 0.8 x 0.11 + 0.2 x 1.10 = 0.308 gpd/ft2 0.75 x 0.308 gpd/ft2 x 420,000 ft2 = 97,020 gpd 2) Recreational & Entertainment (180,000 ft2): 0.75 x 0.55 gpd/ft2 x 180,000 ft2 = 74,250 gpd 3) Total Commercial: 97,020 + 74,250 = 171,270 gpd 2. Residential (800 units 0.75 x 68.7 gpd/dwelling unit x 800 dwelling units = 41,220 gpd 3. Office (2,000,000 ft2): 0.75 x 0.05 gpd/ft2 x 2,000,000 ft2 = 75,000 gpd 4. Green Roof and Ground Landscaping (36.06 acres): Based on use of new irrigation systems using drip irrigation for plantings, soil moisture monitoring for controlling irrigation amounts (frequencies and durations) and planting of lower water using vegetation, an irrigation rate of 2.0 AFY/acre or 1,785 gpd/acre is used here. This results in an estimated demand of 1,785 gpd/acre x 36.06 acres = 64,367 gpd 5. Hotel ,339 rooms Water use for hotels with a restaurant is estimated to be 0.50 gallons/day/sq ft. Estimated total hotel space per room is estimated to be 390 sq ft. Therefore, estimated hotel water demand is: 339 rooms x 390 sq ft/room x 0.50 gallons/day/sq ft = 66,105 gpd 6. Civic Space ,65,000 ft2 including 10,000 ft2 for a Science, Technology, Engineering and Mathematics (STEM) laboratory for high school students Civic space is viewed as the equivalent of office space; therefore, the civic space water use factor is estimated to be 0.75 x 0.05 gpd/ft2 = 0.0375 gpd/ft2. The STEM laboratory is assumed to have a higher water use rate of 0.75 x 0.55 gpd/ft2 = 0.412 gpd/ft2: 55,000 ft2 x 0.0375 gpd/ft2 + 10,000 ft2 x 0.412 gpd/ft2 = 6,182 gpd 7. Total Proposed Project estimated average daily potable water use: 171,270 + 41,220 + 75,000 + 80,369 + 64,367 + 6,182 = 438,408 gpd Estimated net increase in average daily potable water use for the Proposed Project is: 438,408 gpd - 216,089 gpd = 222,319 gpd or 249.0 AFY. The City of Cupertino indicates that the green roof and landscape irrigation requirements estimated to be 64,367 gpd or 72.1 AFY may be met by use of recycled water. If 100% of irrigation water supply were recycled water, it would result in an estimated total potable water use for the Proposed Project of 374,041 gpd. For this scenario, the Proposed Project would have an estimated increase in potable water use of 374,041 — 216,089 = 157,952 gpd or 176.9 AFY. An agreement involving Cal Water, the City of Sunnyvale, Santa Clara Valley Water District (SCVWD), City of Cupertino and the Sand Hill Property Company will need to be prepared and negotiated. It will have to address roles and responsibilities, costs, financing, design and construction, recycled water delivery quantities and quality and a schedule for implementation of recycled water delivery. Since that process has not started and it could take several years for all of this to occur, the WSA assumes that at commencement of use of project facilities, all water needs will be met by potable supplies. Agreements involving the City of Sunnyvale (source of the recycled water), SCVWD (responsible for the transmission system to the City of Cupertino) Cal Water (responsible for retail delivery of recycled water to the Apple Campus 2 site) and Apple (end user and contributor for paying part of the conveyance system capital costs) were negotiated and signed and the recycled water pipeline constructed. However, delivery of recycled water has not started. The City of Cupertino expressed support for design and construction of an extension of the recycled water transmission line from the Apple Campus to the Hamptons housing project and the Vallco area. Cal Water supports the use of recycled water for the Hamptons and Vallco projects, but is not engaged in developing an agreement for that purpose. Estimated Water Use for the General Plan Build -out with Maximum Residential Density Alternative Commercial — same as Proposed Project or 171,270 gpd Office — one half of the Proposed Project (1,000,000 sq ft) or 37,500 gpd Hotel — same as Proposed Project or 66,105 gpd Residential — 2,640 dwelling units or 3.3 x 41,220 gpd (Proposed Project) or 136,026 gpd Green Roof and Ground Landscaping — same as Proposed Project or 64,367 gpd Civic Space and STEM laboratory — same as Proposed Project or 6,182 gpd Total Plan Build -out with Maximum Residential Density Alternative estimated average daily potable water use: 171,270 + 37,500 + 66,105 + 136,026 + 64,367 + 6,182 = 481,450 gpd Estimated net increase in average daily potable water use for the Plan Build -out with Maximum Residential Density is: 481,450 gpd — 216,089 gpd = 265,361 gpd or 297.2 AFY. If the landscaped areas are irrigated with recycled water, then the estimated potable demand for this alternative decreases to 417,083 gpd and the net increase in demand is 200,994 gpd or 225.2 AFY. Estimated Water Use for the Retail and Residential Alternative Commercial - same as Proposed Project or 171,270 gpd Office - 0 gpd Hotel - same as Proposed Project or 66,105 gpd Residential - 4,000 dwelling units or 5 x 41,220 gpd (Proposed Project) = 206,100 gpd Ground Landscaping - 5.6 acres x 1,785 gpd/acre = 9,996 gpd Total Retail and Residential Alternative estimated average daily potable water use: 171,270 + 66,105 + 206,100 + 9,996 = 453,471 gpd Estimated net increase in average daily potable water use for the Retail and Residential alternative is: 453,471 gpd - 216,089 gpd = 237,382 gpd or 265.9 AFY If the landscaped areas are irrigated with recycled water, then the estimated potable demand for this alternative decreases to 443,475 gpd and the net increase in demand is 227,386 gpd or 254.7 AFY. Estimated Water Use for the Occupied/ReTenanted Mall Alternative Commercial -1,207,774 ft2 1) Retail (847,000 ft2): Assume 80% of space is dry goods and 20% is restaurants and food stores Therefore the average water use rate is: 0.8 x 0.11 + 0.2 x 1.10 = 0.308 gpd/ft2 0.75 x 0.308 gpd/ft2 x 947,000 ft2 = 218,757 gpd 2) Recreational & Entertainment (260,774 ft): 0.75 x 0.55 gpd/ft2 x 260,774 ft2 = 107,569 gpd 3) Total Commercial: 218,757 + 107,569 = 326,326 gpd Office - 0 gpd Hotel -148/339 or 0.4366 x 66,105 28,861 gpd Residential - 0 gpd Ground Landscaping - 5.6 acres x 1,785 gpd/acre - 9,996 gpd Total Occupied/ReTenanted Alternative estimated average daily potable water use: 326,326 + 28,861 + 9,996 = 365,183 gpd 10 Estimated net increase in average daily potable water use for the Retail and Residential alternative is: 365,183 gpd — 216,089 gpd = 149,094 gpd or 167.0 AFY If the landscaped areas are irrigated with recycled water, then the estimated potable demand for this alternative decreases to 355,187 gpd and the net increase in demand is 139,098 gpd or 155.8 AFY. Summary of Estimated Net Increase in Potable Water Use including Irrigation of Green Roof and Ground Landscape: 1. Proposed Project: 222,319 gpd or 249.0 AFY 2. Plan Build -out with Maximum Residential Density: 265,361 gpd or 297.2 AFY 3. Retail and Residential: 237,382 gpd or 265.9 AFY 4. Occupied/ReTenanted Mall: 149,094 gpd or 167.0 AFY Summary of Estimated Net Increase in Potable Water Use with Recycled Water for Irrigation of Green Roof and Ground Landscape: 1. Proposed Project: 157,919 gpd or 176.9 AFY 2. Plan Build -out with Maximum Residential Density: 201,036 gpd or 225.2 AFY 3. Retail and Residential: 227,371gpd or 254.7 AFY 4. Occupied/ReTenanted Mall: 139,082 gpd or 155.8 AFY LAS District Background Information The Los Altos District is located in Santa Clara County approximately 45 miles south of San Francisco and 11 miles north of San Jose. The system serves the majority of the incorporated city of Los Altos, portions of the cities of Cupertino, Los Altos Hills, Mountain View, Sunnyvale and adjacent unincorporated areas of Santa Clara County. The service area boundaries are shown in Figure 1. The cities of Mountain View, Sunnyvale, Cupertino and Santa Clara own and operate water systems northeast and southeast of the District. Purissima Hills Water District serves the remaining portion of the Town of Los Altos Hills. 11 Figure 1: LAS District Service Area (Areas bounded by blue line) Cal Water uses U.S. Census data in estimating population in all of its districts in California. Its methodology for estimating existing and future population has been reviewed and accepted by the California Public Utilities Commission (CPUC), which provides regulatory oversight of privately owned water and wastewater utilities. Estimates of the population serviced by Cal Water in the LAS district are based on overlaying the 2010 U.S. Census Tract Block data with the service area boundary as shown in Figure 4. LandView 5 and MARPLOT® software are used to generate data. When compared to year 2000 Census data, the 10 year population growth rate in Cal Water's LAS district service was 18.8% based on a 2000 population census based estimate of 55,177 and a 2010 population census based estimate of 65,550. This was increase of 10,373 persons in 10 years or average annual increase of 1,037 persons. Total housing units (single family and multi- family) increased from 21,258 to 25,301 or 4,043 units in 10 years for an average annual increase of 404 units. Based on 2010 U.S. Census data, occupant density is 2.59 persons per residential unit (single family and multifamily units). 12 This data was used as a baseline for estimating population starting in 2010. To calculate estimated population after 2010, the Census 2010 population was divided by the total number of dwelling units served by Cal Water in 2010 to produce a population density value. This value was then multiplied by the number of projected dwelling units in each future year. The twenty-year growth rate for customer service types was used by Cal Water to estimate the future number services to 2040 and population in the LAS District. Use of the twenty-year growth rate correlated most closely with past growth and current growth trends. In the 2010 UWMP, Cal Water estimated the LAS district service area population to be 56,940. As noted, using 2010 US Census data, Cal Water revised its 2010 estimate to 65,550, which is a difference of 8,610 or 15.1 % greater. In the 2015 LAS District UWMP, Cal Water estimated the service area population to be 68,604 in 2015. Service area population increased at an average annual rate of 1.46 percent from 2000 to 2015 primarily because of the expansion of the service area. Between the 2000 and 2010 Censuses, population increased at an average annual rate of 1.74 percent. Between 2010 and 2015, increase slowed to an average annual rate of 0.92 percent per year. Service area population is projected to increase at a rate of 0.91 percent annually to 2040. This is based on the long-term growth rate of single-family housing units and an increase in construction of multi -family housing units. Cal Water's service area population forecast is shown in Table 1. This forecast is used in the WSA. A comparison of various population projections is shown in Figure 2 13 100,000 90,000 80,000 70,000 60,000 50,000 O 40,000 a 30,000 20,000 10,000 Figure 2: LAS District Population Projection Comparison 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Year 14 LAS District Water Demand Actual LAS District water use in 2015 by customer category is shown in Table 2. Total system demand in 2015 was 10,188 AF. Water use in 2015 was strongly affected by the Drought Emergency Regulation adopted by the State Water Resources Control Board in May of 2015 (SWRCB Resolution No. 2015-0032). The Drought Emergency Regulation mandated urban retail water suppliers reduce potable water use between June of 2015 and February of 2016 by percentage amounts specified by the State Water Resources Control Board. The LAS District was ordered to reduce potable water use by 32 percent over this period relative to use over the same period in 2013. Between June and December 2015, water use was 38.3 percent less than water use over the same period in 2013. Table 2: LAS District PseType Demands for Potable I Im Quantity (AF) Single Family 6,615 Multi -Family 595 Commercial 1,930 Industrial 11 Institutional/Governmental 436 Other 16 Losses 585 Total 10,188 Residential customers account for approximately 92 percent of services and 76 percent of water use in the District, most of which is associated with single-family residences. Figure 4-1 shows the distribution of services in 2015. Figure 3 shows historical water sales by customer category. 15 Figure 3: LAS District Demand by User Class for 2015 Figure 4 shows historic water use for all user classes. �ntial mercial i.3% ustria I ).0% nment L% Figure 4: LAS District Historic Water Use (2015 Data) ■ Single Family (SFR) ■ Multi Family ■ Commercial ■ Industrial ■ Government ■ Other ■ Unaccounted for Water 18,000 16,000 14,000 1z,000 d d 10,000 C c d 8,000 6,000 4,000 2,000 0 N N N N N N mm m m m m m m m m m w w w o o o o o o o o o 0 0 0 0 0 0 0 O 1 N w A N M J M W O W W O - N w A Year 16 California Senate Bill x7- 7 Baseline and Targets Senate Bill No. 7 (SBx7-7) adopted in November 2009 mandates a statewide 20% reduction in per capita urban water use by December 31, 2020. The CPUC directed Class A and B water utilities to adopt conservation programs and rate structures designed to achieve reductions in per capita water use. To increase water conservation, Cal Water in 2010 developed five-year conservation program plans for all of its service districts. The LAS District Conservation Master Plan is in Appendix G of the 2015 UWMP. SBx7-7 required reducing per capita water use by at least 10 percent on or before December 31, 2015. Urban retail water suppliers are to develop 2015 and 2020 water use targets in accordance with alternative methods and specific requirements. Retail water suppliers can also form regional alliances within the same hydrologic region to achieve compliance. Annual LAS District per capita demand for the 20 year period between 1995 and 2014 ranged from a high of 244 gpcd in 2000 to a low of 152 gpcd in 2011. The 2015 annual per capita demand was 132.5 gpcd — a decrease, which is viewed as the result of LAS District customers responding to intensified efforts by Cal Water, SCVWD and the state to achieve the 20% reduction in water mandated by the Governor of California. In its updated projections, Cal Water increases per capita daily water demand to 184 gpcd in 2020 and beyond assuming that after the current drought ends, normal or above normal annual rainfall and runoff will occur. An increase in per capita water consumption has been observed in previous years following droughts. The 184 gpcd is still less than the adjusted 2015 and 2020 SBx7-7 targets. Expected water use per service, shown in Figure 5, is based on weather -normalized historical use, adjusted for future expected water savings from plumbing codes and District conservation programs. Weather normalization of historical use was done econometrically using the California Urban Water Conservation Council GPCD Weather Normalization Methodology. Expected water savings from plumbing codes are presented in Section 4.4 of the LAS District UWMP. Expected water savings from District conservation programs and projected compliance with the District's SB X7-7 2020 per capita water use target are discussed in Chapter 9 of the 2015 LAS District UWMP. The projected trend in average use per service shown in Figure 5 does not account for possible effects of climate change on future demand. The potential effects of climate change on demand are discussed in Section 4.6 of the LAS District UWMP. Projected water uses in Figure 5 and Table 3 are based on unrestricted demands under normal weather conditions. Demands are assumed to partially rebound by 2020 from 2015 levels due to the State Water Resources Control Board's ending its mandatory water use reductions in 2016, which occurred. FkA Figure 5: Historical and Projected Average Use per Service in Gallons per Day 800 700 a 600 u `m '^ 500 a� n 0 400 a� n H 300 0 ra C7 200 Actual Projected -- Drought Rebound 100 0 2005 2010 2015 2020 2025 2030 2035 2040 Table 3: LAS Use District ProjectedDemands 2020 2025 2030 2035 2040 Single Family 9,756 9,750 9,787 9,842 9,909 Multi -Family 865 901 960 1,034 1,122 Commercial 2,465 2,442 2,445 2,448 2,454 Industrial 20 20 20 20 20 Institutional/Governmental 636 657 681 705 731 Other 28 28 28 28 28 Losses 387 392 397 403 408 Total 14,156 14,190 14,318 14,480 14,673 From 2020 to 2040, projected water demand is based on multiplying updated population projections in Table 1 by varying per capita water use rates. 18 Vallco ASP Proposed Project and Alternatives and LAS District Demand The estimated completion and full occupancy date of the Proposed Project and Alternatives is January 2029. It is estimated that 50% of estimated increased new demand will occur by 2025 and the balance or 100% by 2029. Actual water use in the LAS District in 2017 was 11,656 AF compared to 10,188 AF for 2015 or an increase of 1,468 AF in two years. The increase in water use was mainly due to the lifting of the mandatory water use reductions. The projected LAS District water use in 2030 is 14,318 AF; therefore, the projected increase in demand between 2017 and 2030 is 2,662 AF. Expressed as percentages of the increase in demand between 2017 and 2030, the estimated net new water demand of the Proposed Project and three alternatives assuming the green roof and ground landscaping are irrigated with potable water are as follows. Also, shown are the percentages of net new demand based on total 2030 demand. 1. Proposed Project: 9.3% (249/2,662); or 1.7% of total 2030 demand 2. Plan Build -out with Maximum Residential Density: 11.2% (297.2/2,662); or 2.0% of total 2030 demand 3. Retail and Residential: 10.0% (265.9/2,662); or 1.8 % of total 2030 demand 4. Occupied/ReTenanted Mall: 6.2% (167/2,662) or 1.2% of total 2030 demand Again, as percentages of the increase in demand between 2017 and 2030, estimated net new water demand of the Proposed Project and three alternatives assuming the green roof and ground landscaping are irrigated entirely with recycled water are as follows. These are followed by percentages of net new demand based on total 2030 demand. 1. Proposed Project: 6.6% (176.9/2,662); or 1.2% of total 2030 demand 2. Plan Build -out with Maximum Residential Density: 6.6% (225.2/2,662); or 1.6% of total 2030 demand 3. Retail and Residential: 8.4% (225.2/2,662); or 1.6% of total 2030 demand 4. Occupied/ReTenanted Mall: 5.8% (155.8/2,662); or 1.1% of total 2030 demand Water demands of the Apple Campus 2 project are estimated in a SB 610 WSA, February 1, 2012. Total potable and non -potable estimated water use for Apple Campus 2 Phases 1 and 2 is 520 AFY for the water conserving scenario, which was selected and has been implemented. As presented in the Apple Campus 2 WSA, potable water use at build out was estimated to be 242 AFY and recycled water for landscape irrigation, interior fixtures and process water requirements was estimated to be 278 AFY. Cal Water, City of Sunnyvale, Apple, and SCVWD entered into agreement to provide recycled water to Apple Campus from the Sunnyvale recycled water system. A recycled water transmission line has been constructed to the Apple Campus 2 site to deliver 175 AFY or 103 AFY less than the 278 AFY estimated in the Apple Campus 2 WSA. Accordingly, 103 AFY of water demand is added to the estimated potable demand of 242 AFY to yield a revised total 19 potable water demand of 345 AFY for Apple Campus 2 at full occupancy. Total demand is still estimated to be 520 AFY. Total estimated existing potable water use site area prior to the Apple Campus 2 project was estimated to be 398.4 AFY. Therefore, the net increase in water demand by the Apple Campus 2 project is 121.6 AFY. Since 175 AFY of demand will be met by non -potable water, the net effect on potable supply of the Apple Campus 2 project is to decrease demand on the potable supply by 53.4 AFY. A WSA has been prepared by Cal Water for the Hamptons Project. That WSA estimates the increased demand for the proposed project to be 28.1 AFY. In a February 29, 2012, letter, the City of Cupertino requested that Cal Water review its SB 610 Water Supply Assessment (WSA) dated August 12, 2008 for the Main Street Development Project with respect to two proposed additional alternative development options that differ from the two options assessed in the WSA. The City requested that changes to the base scheme option be assessed for their impact on project water demand. In a March 21, 2012 response to the City Cal Water compared the estimated water demand for Option 1D (base scheme) to Plan A, the higher water use option in the 2008 WSA. In Cal Water's Addendum No. 1 to the WSA, dated March 21, 2012, the estimated water demand for Option 1D (Base Scheme) is 268,580 gpd compared to the August 12, 2008, WSA estimated demand for Plan A of 265,400 gallons/day. The demand for Option 1D, used here, is: 30.1 AFY. The estimated water demands for the 1) Plan Build out with Maximum Residential Density (highest projected water use for the Vallco ASP), 2) Hamptons Project, 2) Apple Campus 2 using recycled water and the typical development scenario and 4) Main Street Development Project are added to Cal Water's 2015 LAS District demand projection shown in Table 2 resulting in a revised LAS District demand projection shown in Table 4. Table 4: LAS District Plus and Projected 2005 2010 FourDevelopment Water 2015 DemandActual 2020 2025 2030 2035 2040 LAS District 14,758 11,648 10,188 14,156 14,190 14,318 14,480 14,673 Hamptons Project 0 0 0 28.1 28.1 28.1 28.1 28.1 Vallco Plan Build Out 0 0 0 0 148.6 297.2 297.2 297.2 Apple Campus 2 0 0 0 121.6 121.6 121.6 121.6 121.6 Main Street Project 0 0 0 30.1 30.1 30.1 30.1 30.1 Total 14,758 11,648 10,188 14,336 14,518 14,795 14,957 15,150 20 LAS District Water Demand Management Cal Water has significantly expanded its water conservation programs. State law, CPUC directives and a state water conservation organization are focused on reducing urban water use and have provided much of the impetus. This includes: 1. Recent decisions by the CPUC directing regulated water utilities to reduce per capita urban water demand. 2. State legislation mandating urban water suppliers reduce per capita demand 20 percent by 2020. 3. Memorandum of Understanding Regarding Urban Water Conservation in California (MOU). The projections of future water use incorporate expected water savings from plumbing codes and appliance standards for residential and commercial toilets, urinals, clothes washers, dishwashers, and showerheads. These savings are commonly referred to as passive water savings to differentiate them from water savings resulting from water supplier conservation programs, which are termed active water savings. Active water savings resulting from the LAS District's implementation of demand management measures are discussed in Chapter 9 of the 2015 UWMP. The estimates of passive water savings in Table 5 were developed with the Alliance for Water Efficiency's Water Conservation Tracking Tool using data on the vintage, number, and water using characteristics of residences and businesses within LAS District's service area. The following codes and standards are the basis for estimated passive water savings: • AB 715, enacted in 2007, requires that any toilet or urinal sold or installed in California on or after January 1, 2014 cannot have a flush rating exceeding 1.28 and 0.5 gallons per flush, respectively. On April 8, 2015, in response to the Governor's Emergency Drought Response Executive Order (EO B-29-15), the California Energy Commission approved new standards for urinals requiring that they not consume more than 0.125 gallons per flush, 75% less than the standard set by AB 715. • Water use standards for residential and commercial clothes washers and dishwashers are established by the U.S. Department of Energy through its authority under the federal Energy Policy and Conservation Act. Water use efficiency is summarized by the water factor for the appliance which measures the gallons of water used per cycle per cubic foot of capacity. A typical top -loading residential clothes washer manufactured in the 1990s had a water factor of around 12. In 2015, the allowable water factor for top- and front -loading residential clothes was reduced to 8.4 and 4.7, respectively. In 2018, water factor standard for top -loading residential clothes washers has been reduced to 6.5. In 2010 the allowable water factor for top- and front -loading commercial clothes washers was reduced to 8.5 and 5.5, respectively. 21 The maximum water factor for Energy Star compliant top- and front -loading washers is 3.7 and 4.3, respectively. An Energy Star compliant washer uses about two-thirds less water per cycle than washers manufactured in the 1990s. Federal dishwasher water use efficiency standards were last updated in 2013. The maximum water use for standard and compact sized dishwashers is 5.0 and 3.5 gallons per cycle, respectively. • New construction and renovations in California are now subject to CalGreen Code requirements. CalGreen includes prescriptive indoor provisions for maximum water consumption of plumbing fixtures and fittings in new and renovated properties. CalGreen also allows for an optional performance path to compliance, which requires an overall aggregate 20% reduction in indoor water use from a calculated baseline using a set of worksheets provided with the CalGreen guidelines. • SB 407, enacted in 2009, mandates that all buildings in California come up to current State plumbing fixture standards within this decade. This law establishes requirements that residential and commercial property built and available for use on or before January 1, 1994 replace plumbing fixtures that are not water conserving, defined as "noncompliant plumbing fixtures" as follows: o any toilet manufactured to use more than 1.6 gallons of water per flush; o any urinal manufactured to use more than one gallon of water per flush; o any showerhead manufactured to have a flow capacity of more than 2.5 gallons of water per minute; and o any interior faucet that emits more than 2.2 gallons of water per minute. For single-family residential property, the compliance date was January 1, 2017. For multi -family and commercial property, it is January 1, 2019. In advance of these dates, the law requires effective January 1, 2014 for building alterations and improvements to all residential and commercial property that water -conserving plumbing fixtures replace all noncompliant plumbing fixtures as a condition for issuance of a certificate of final completion and occupancy or final permit approval by the local building department. SB 407 also requires effective January 1, 2017 that a seller or transferor of single- family residential property disclose to the purchaser or transferee, in writing, the specified requirements for replacing plumbing fixtures and whether the real property includes noncompliant plumbing. Similar disclosure requirements go into effect for multi -family and commercial transactions January 1, 2019. SB 837, passed in 2011, reinforces the disclosure requirement by amending the statutorily required transfer disclosure statement to include disclosure about whether the property is in compliance with SB 407 requirements. These two laws require retrofit of non- compliant plumbing fixtures upon resale or major remodeling for single-family residential properties effective January 1, 2017 and for multi -family and commercial properties effective January 1, 2019. • SB 7, enacted in 2016, requires a water purveyor that provides water service to a newly constructed multiunit residential structure or newly constructed mixed-use residential and commercial structure that submits an application for a water `*a connection after January 1, 2018, measure the quantity of water supplied to each individual dwelling unit as a condition of new water service and permit the measurement to be by individual water meters or submeters. This bill intends to encourage the conservation of water in multiunit structures. California has also adopted regulations governing the future use of landscape water use. • The California Water Commission approved the State's updated Model Water Efficient Landscape Ordinance (MWELO) on July 15, 2015. The updated MWELO supersedes the State's MWELO developed pursuant to AB 1881. Local agencies had until December 1, 2015 to adopt the MWELO or to adopt a Local Ordinance which must be at least as effective in conserving water as MWELO. Local agencies working together to develop a Regional Ordinance have until February 1, 2016 to adopt. The size of landscapes subject to MWELO has been lowered from 2500 sq. ft. to 500 sq. ft. The size threshold applies to residential, commercial, industrial and institutional projects that require a permit, plan check or design review. Additionally, the maximum applied water allowance (MAWA) has been lowered from 70% of the reference evapotranspiration (ETo) to 55% for residential landscape projects, and to 45% of ETo for non-residential projects. This water allowance reduces the landscape area that can be planted with high water use plants such as cool season turf. For typical residential projects, the reduction in the MAWA reduces the percentage of landscape area that can be planted to high water use plants from 33% to 25%. In typical non-residential landscapes, the reduction in MAWA limits the planting of high water use plants to special landscape areas. The revised MWELO allows the irrigation efficiency to be entered for each area of the landscape. The site -wide irrigation efficiency of the previous ordinance (20 10) was 0.71; for the purposes of estimating total water use, the revised MWELO defines the irrigation efficiency (IE) of drip irrigation as 0.81 and overhead irrigation and other technologies must meet a minimum IE of 0.75. • CalGreen requires that automatic irrigation system controllers for new landscaping provided by a builder and installed at the time of final inspection must be weather- or soil moisture -based controllers that automatically adjust irrigation in response to changes in plant water needs as weather or soil conditions change. The estimates of future water savings in Table 4 do not include potential landscape water savings from implementation of MWELO or CalGreen because estimating these savings required data that was not available to the District at the time this plan was prepared, including data on existing and future landscape areas, plant materials, irrigation equipment, and probable enforcement of and compliance with the landscape design and irrigation equipment requirements. There are three ways in which a water supplier can comply with the MOU. The first is to implement a set of water conservation best management practices (BMPs) according to the requirements and schedules set forth in Exhibit 1 of the MOU. The second way, called Flex Track compliance, is to implement conservation programs expected to save an equivalent or greater volume of water than the BMPs. The third, similar to SBx7-7, is to reduce per capita water use. 23 Cal Water used Flex Track to estimate expected water savings over the 10 -year period (2009-2018) were it to implement programmatic BMPs in accordance with MOU requirements as shown in Table 6. It can achieve these water savings through any combination of programs it selects. Table 6: MOU Best Management BMP Grou BMP Name 1. Utility Operations Programs (F) Conservation Coordinator Water Waste Prevention Wholesale Agency Assistance Programs Water Loss Control Metering & Volumetric Rates Retail Conservation Pricing 2. Education Programs (F) Public Information Programs School Education Programs 3. Residential (P) Residential Assistance Program Landscape Water Surveys High Efficiency Clothes Washer Program Watersense Toilet Program Watersense Specifications for Residential Development 4. Commercial, Industrial, Institutional (P) Reduce baseline CII water use by 10% in 10 years 5. Landscape (P) Large Landscape Water Budget Programs Large Landscape Water Surveys F = Foundational BMP, P = Programmatic BMP 2015 and 2020 Gallons per Capita per Day (GPCD) LAS District Targets Urban retail water suppliers may select from four GPCD target methods (CWC 10608.20). • Target Method 1: 20% reduction from 10 -year baseline GPCD • Target Method 2: Water use efficiency performance standards • Target Method 3: 95% of Hydrologic Region Target • Target Method 4: Savings by water sector, DWR Method 4 Regardless of target method selected, the final target cannot exceed 95 percent of the 5 -year baseline period average GPCD (CWC 10608.22). The LAS District selected Target Method 1, which sets the 2020 target to either 80 percent of the 10 -year baseline or 95 percent of the 5 -year baseline average GPCD, whichever is less. This results in a 2020 target of 185 GPCD. The 2015 interim target of 209 GPCD is the midpoint between the 10 -year baseline average GPCD and the 2020 target. The District's GPCD baselines and targets are summarized in Table 7. Table District Baselines and GPCD Targets Baseline Average 2015 Interim Confirmed Start Years End Years Period GPCD Target 2020 Target 10-15 year 1996 2005 232 209 185 5 Year 2003 2007 223 24 The LAS District's 2015 compliance daily per capita water use was 133 gallons compared to its 2015 interim target of 209 gallons. The low per capita water use in 2015 partially reflects the impacts of the Drought Emergency Regulation adopted by the State Water Resources Control Board in May of 2015 (SWRCB Resolution No. 2015-0032). Among other things, the Drought Emergency Regulation mandated urban retail water suppliers reduce potable water use between June of 2015 and February of 2016 by percentage amounts specified by the State Water Resources Control Board. The LAS District was ordered to reduce potable water use by 32 percent over this period relative to use over the same period in 2013.However, the Drought Emergency Regulation does not explain all of the decline in per capita water use, which has been trending downward since 2000 when it reached 244 GPCD. By 2014 this had fallen by 30 percent, to 172 GPCD. Between 2014 and the end of 2015, per capita water use had fallen an additional 23 percent, to 133 GPCD. Demand Management Measures (DMM) Cal Water centrally administers its conservation programs for its 24 districts. DMM programs are grouped in the following categories in Section 10631(f) of the UWMP Act: (i) Water waste prevention ordinances (ii) Metering (iii) Conservation pricing (iv) Public education and outreach (v) Distribution system water loss management (vi) Water conservation program coordination and staffing support (vii) Other demand management measures Following are summaries of these programs. Water Waste Prevention Ordinances Cal Water enforcement of water use restrictions is authorized by the CPUC through Rule 14.1 or Schedule 14.1. Restrictions may also be regulated by ordinances passed by the local governments. In the LAS District, the Cities of Cupertino, Mountain View, and Sunnyvale have passed water conservation ordinances, which are included in Appendix J of the 2015 UWMP. Due to worsening drought conditions, Cal Water filed Schedule 14.1 with the CPUC in the spring of 2015 which went into effect on June 1, 2015. Cal Water's Schedule 14.1 filing, which applies to both residential and non-residential customers, was responsive to the Governor's emergency drought declaration and executive order requiring a statewide 25% reduction in urban potable water use. It also complies with regulations adopted by the State Water Resources Control Board (State Board) and the CPUC to achieve that reduction by the end of February 2016. Schedule 14.1 put measures in place to enable Cal Water to enforce water -use prohibitions set by the State Board, including: • Applying water to outdoor landscapes that causes runoff onto adjacent property, non- irrigated areas, private and public walkways, roadways, parking lots, or structures • Using a hose to wash motor vehicles unless the hose is fitted with a shut-off nozzle or device that causes it to cease dispensing water immediately when not in use • Applying water to driveways and sidewalks 25 • Using water in a fountain or other decorative water feature, except where the water is part of a recirculating system • Applying water to outdoor landscapes during and within 48 hours after measurable rainfall • Using potable water to irrigate outside of new construction without drip or micro - spray systems • Using potable water on street medians • Filling or refilling ornamental lakes or ponds except to sustain existing aquatic life Additionally, Schedule 14.1 requires that: • Customers must fix leaks within their control within five business days of notification • Hotel/motel operators must provide option to not have towels or linens laundered daily during a guest's stay, and must provide clear notice of this option in easy -to - understand language • Restaurants and other eating and drinking establishments may only serve drinking water upon request With the approval of the Schedule 14.1 filing, beginning June 1, 2015, individual customers in each Cal Water district were provided water budgets based upon their water use each month in 2013 minus the state -mandated reduction for the Los Altos Suburban District of 32%. If a customer used less than his or her water budget, the unused water was carried forward, similar to rollover minutes on a cell phone plan. Water used in excess of the monthly budget was subject to a drought surcharge. The surcharge was discounted for customers on Cal Water's Low -Income Rate Assistance (LIRA) program. To help with compliance, the customer's monthly bill showed the water budget for the following month. Customer's water use history back to 2011 and their water budgets were available online Cal Water's Schedule 14.1 filing is included as Appendix J of the 2015 UWMP. Metering All service connections within the LAS District are metered. Meters are read monthly and routinely maintained and calibrated. Conservation pricing Starting in 2008, Cal Water adopted tiered usage rates for single family residential services. Uniform use rate designs still apply to the other water user types. Conservation pricing provides economic incentives to customers to use water more efficiently. The LAS District's rate structure complies with Option 1 of the Urban MOU's definition of conservation pricing. Urban MOU BMP compliance reports are provided in Appendix I of the 2015 UWMP. Public Education and Outreach Cal Water's public outreach program is comprised of four components: Residential Customer Assistance 26 Non -Residential Customer Assistance Public Information and School Education Rebate Program Information and Marketing Programs for Reducing Distribution System Losses Cal Water annually quantifies the LAS District's apparent and real water losses. Conservation staff using the AWWA water audit method and component analysis process has completed water balances for all Cal Water districts. For the three-year period 2013-2015, apparent and real water loss in the LAS District averaged 857 AF, or about 7 percent of total production. In addition to its routine and planned system maintenance and water loss reporting, in 2017 Cal Water implemented a lift -and -shift sonic data logger leak detection program in the LAS District. The lift -and -shift program surveys up to one-third of main miles annually in three shifts. Lift - and -shift sonic data logging technology will enable Cal Water to quickly and efficiently locate leaks in one part of the water distribution system and then redeploy the equipment to another part. Cal Water estimates this program will reduce real water loss in the District by 40 AFY. Additional potential benefits of the program include reduced excavation of streets, less staff overtime spent responding to and repairing catastrophic main breaks, and improvement to the best management practices of the valve maintenance program. LAS District Water Supply Water supply for the LAS District is from Cal Water wells and purchased treated water from SCVWD. During the last 5 years approximately 35% of total supply was from Cal Water wells and 65% was purchased water from SCVWD. The amount of groundwater pumped annually from Cal Water wells depends upon the supply available from SCVWD. SCVWD imports surface water to the region through the South Bay Aqueduct of the State Water Project (SWP), the San Felipe Division of the Federal Central Valley Project (CVP), and through the San Francisco Public Utilities Commission's (SFPUC) Regional Water System. However, Cal Water only receives water from the SWP and CVP. Purchased SCVWD water projections are based on historical trends being extended to 2040 and include "Non -Contract" water. In SCVWD's 2012 Water Supply and Infrastructure Master Plan baseline supplies are projected to increase from 398,000 AFY in 2012 to 421,000 AFY in 2035 or an average annual increase of 1,000 AFY per year. In addition, water conservation savings are projected to increase from 53,000 AFY in 2012 to 99,000 AFY in 2030 or an average annual increase in savings of 2,555 AFY per year. So the effective SCVWD increase in supply including water conservation savings is 3,555 AFY. The LAS District's share of SCVWD's average annual effective supply increase is about 2.2% Groundwater supply projections are based on groundwater production being set to meet the difference between LAS District demand and supply deliveries from SCVWD in a given year. Cal Water has more than adequate well capacity to meet projected demands through 2040. As wells reach the end of their useful life are taken out of service, they are replaced with new wells. Table 8 presents the supply plan to match the projected LAS District demand projection in Table f4i 4. Assuming no water supply shortages and based the amount of potable water delivered by SCVWD to the LAS District and a constant annual use of recycled water from SCVWD for non - potable use on the Apple Campus 2 site and other future sites, Cal Water will pump groundwater from its wells to meet demand. Table ' Water Supply Sources District 2010 Actual and 2015 Projected 2020 2025 2030 2035 2040 SCVWD Purchased Water 8,887 6,846 10,400 10,600 10,800 11,000 11,200 Groundwater Wells 3,892 3,342 3,716 3,657 3,734 3,696 3,689 Recycled Water 0 0 220 261 261 261 261 11,648 10,188 14,336 14,518 14,795 14,957 15,150 SCVWD Purchased Water Cal Water has a contract to 2035 with SCVWD to purchase treated surface water and convey it to the LAS District. SCVWD owns and operates three separate water treatment plants (Penitencia, Rinconada, and Santa Teresa) to produce supplies for its retail utilities. Finished water is delivered to the LAS District from the Rinconada treatment plant through the West Pipeline, a large -diameter pipe that runs through Cupertino and along the Foothill Expressway. The LAS District takes SCVWD water from four locations in the system - the "Tantau-Vallco", "Granger", "Farndon", and "Covington" turnouts. The Farndon and Granger turnouts are located directly on the West Pipeline, while the Tantau-Vallco turnout is located on the Santa Clara Distributary, and the Covington connection is located on the Mountain View Distributary. When surface water supplies are plentiful, SCVWD authorizes the sale of "Non -Contract" water in order to facilitate conjunctive use storage of surplus supply in groundwater aquifers in the region. Because there is usually an economic advantage to purchasing "Non -Contract" water, the LAS District reduces production of groundwater and increases its purchase of surface deliveries from SCVWD. When supplies are scarce, SCVWD has imposed both voluntary and mandatory reductions in the use of water. Because surplus supplies are stored underground by SCVWD when available, during shortages the District increases groundwater production and reduces the direct purchase of water from SCVWD. Because SCVWD replenishes the groundwater resources within its boundaries, it levies an assessment on the production of groundwater to finance this operation. During normal periods of supply, the groundwater pumping assessment is set such that the cost of pumping groundwater is essentially equal to the cost of directly purchasing water from SCVWD. Because it is unknown whether "Non -Contract" water will be available when the purchase water schedules are prepared, and because "Non -Contract" water is only available in the non -summer months between October and April of the next year, the scheduling of deliveries is set to maximize the delivery of purchased water in the summer and utilize groundwater production capacity to its fullest during all other periods. This scheduling pattern enables the LAS District to take 28 advantage of the economic incentive provided by the sale of "Non -Contract" water and assist SCVWD in accomplishing the goal of storing surplus supplies. SCVWD has scheduling restrictions regarding the purchase of direct deliveries. These restrictions currently limit the Peak Day deliveries to 180 percent of the average day delivery; the maximum monthly delivery cannot exceed fifteen percent of the annual scheduled delivery. SCVWD prepared a 2012 Water Supply and Infrastructure Master Plan (WSIP) which indicates that the basis for its sustainable water supply strategy is to: 1) secure existing supplies and infrastructure, 2) optimize use of existing supplies and infrastructure, and 3) increase recycling and conservation. The WSIP states it will "secure existing supplies and facilities for future generations". In addition, SCVWD will make more effective use of its existing assets. It is committed to working with its retail utilities to meet Silicon Valley's future increases in water demand through conservation and recycling. The 2012 WSIP takes into account climate changes and reduced imported supplies and is based on the 2010 UWMPs prepared by its member utilities. It is intended to be responsive to stakeholder needs and provide adequate supplies and delivery infrastructure through 2035. Baseline water supplies are expected to increase from the current average of about 398,000 AFY to an average of 421,000 AFY in 2035. The increase in baseline supplies is due to removal of operating restrictions on existing reservoirs and increased non -potable water recycling. Baseline conservation savings are projected to increase from about 53,000 AFY in 2011 to about 99,000 AFY by 2030. These savings are expected to reduce demands on the water supply system and the need for more capital -intensive improvements. SCVWD indicates that adequate investment in its infrastructure system is critical to supply reliability. Some key elements of SCVWD's plan are: 1) Groundwater Recharge: new ponds will add about 3,300 AFY on average. 2) Reservoir Pipeline: A connection between Lexington Reservoir and the raw water system will provide greater flexibility in using existing local water supplies and will allow surface water from Lexington Reservoir to be put to beneficial use elsewhere in the county, especially when combined with the indirect potable reuse project. In addition, the pipeline will enable SCVWD to capture some wet -weather flows that would otherwise flow to the Bay. The pipeline will provide an average annual yield of 1,500 AFY. 3) Imported Water Reoperations: SCVWD will re -operate its Semitropic Groundwater Bank when it is nearly full and SCVWD water supply needs are otherwise met to sell or exchange up to 50,000 AFY of stored water. This would create additional space in the Semitropic Groundwater Bank for carryover of supplies during wetter years, maximize the value of SCVWD's existing assets (imported water contracts and investment in the Semitropic Groundwater Bank), and potentially help fund investments in infrastructure and additional local supplies. 4) Increase Recycling and Conservation: SCVWD's supply sustainability strategy relies upon development of indirect potable reuse to provide most of the new water supply to meet future water needs. The WSIP assumes that at least 20,000 AFY of advanced treated recycled water will be used for groundwater recharge by 2030. Currently, SCVWD is in the process of accelerating the expansion of its existing Silicon Valley Advanced Water Purification Center (SVAWPC) which has an existing production capacity of 8 mgd (8,970 AFY) to probably 32 mgd (35,870 AFY) by mid -2020 and using the product water 29 for recharging groundwater aquifers for potable use. Details on the availability and scheduling of SCVWD surface water deliveries are described further in Section 6.1 of the LAS District 2015 UWMP. Groundwater Cal Water has more than sufficient well capacity to meet the demands not met by SCVWD purchases through 2040. As older wells are taken out of service and replaced with new wells, the system's total capacity is expected to only marginally increase. Maximum day demands, both current and projected, are supplied by deliveries of imported water from SCVWD. Production records show that average day demand reached a high of 14.19 MGD in 2004. The ten-year average through 2014 was 12.36 MGD. The maximum day demand reached 28.72 MGD in 2001 with a ten-year average of 22.32 MGD. The 10 -year average values result in a typical maximum day to average day ratio of 1.81. Historically, the District's distribution facilities have been able to deliver this level of demand. Average static groundwater elevations in the District have remained relatively consistent since the SCVWD began its recharge activities. Over the period of record the level has fluctuated due to varying hydrologic conditions. As shown in Figure 6, the extended multi-year drought in the early 1990's caused a 40 -foot decline in static groundwater elevation. Drought recovery began in 1992, with an increase in the average static groundwater elevation to pre -drought levels. Elevations again declined in 2014-15. The LAS District has 20 wells, which are currently active and operational. The wells have a combined design capacity of 14,440 gpm, which is 20.79 million gallons per day (mgd). Operated continuously at 90% of design capacity, the wells could produce 20,980 AFY. While the LAS District has not had the need to operate its wells continuously, it has produced 650 to 750 AF in a given month or 9,000 AFY, which is only 43% of 20,980 AFY. Maximum day demands, both current and projected, are supplied by deliveries of treated water from SCVWD. Production records show that average day demand reached a high of 13.83 mgd (15,504 AFY) in 2008 and has a ten-year average of 13.36 mgd, while maximum day demand reached 28.72 mgd with a ten-year average of 24.91 mgd. These values result in an average day to maximum day ratio of 1.86:1. The LAS District distribution system is designed to deliver anticipated maximum day demands. Average static groundwater elevations in the District were relatively constant after the SCVWD began its recharge program. However, during the past 4 year drought period (from 2012 to 2015), the running average declined about 18 feet as shown in Figure 7, which is still significantly better than before SCVWD's recharge program. Average static water levels in 1991 were 140 feet below ground surface versus 110 feet for 2015 — a difference of 30 feet. Over the period of record, average static levels have fluctuated due to hydrologic conditions. The extended multi-year drought in the early 1990's reduced groundwater surplus water and caused a 40 -foot decline in static groundwater elevation. Drought recovery began in 1992, with an increase in the average static groundwater elevation to pre -drought levels, as shown in Figure 7. 30 Figure 6: LAS District Well Level Average (Static) DISTRICT WELL LEVEL AVERAGE (Statio) District: LOS ALTOS SUBURBAN For All Years Ar, Of: 111212016 ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■ ■■■■.1■f11.�jA���}���1rir�R'!�"��:.1�..�+�� .►ii�7,li1i1 ■■!■■ I I■I.a'1'1':iJ■ I ■I i■■�Ilri■�■�!■liltl�l l{1YJ ■■■■■■■■■■■■■■■■■■■ Basin Description Section 6.2 of the 2015 UWMP provides more information on groundwater. DWR Bulletin 118 (Appendix G in the 2015 UWMP) provides detailed information on the Santa Clara sub -basin of the Santa Clara Valley Groundwater Basin from which Cal Water's wells pump water. Groundwater Management Groundwater quality and quantity in the LAS District are actively managed by SCVWD in accordance with its Groundwater Management Plan (GMP), which it updates periodically. The most recent update was completed in 2012. A copy of the 2012 SCVWD Groundwater Management Plan is included in Appendix G of the LAS District 2015 UWMP. Since the 1930s, SCVWD's water supply strategy has been to effectively manage the integrated use of surface and groundwater supplies to reliably meet water supply demands. This includes recharge of groundwater with imported and local surface supplies and through maximizing use of treated surface waters when available, acquisition of supplemental water supplies, water conservation and wastewater recycling. Sustainable Groundwater Management Act On September 16, 2014, Governor Brown signed into law Assembly Bill 1739, Senate Bill 1168, and Senate Bill 1319 (AB -1739, SB -1168, and SB -1319). This three -bill legislative 31 package is known collectively as the Sustainable Groundwater Management Act (SGMA). SGMA was amended in 2015 by Senate Bill 13, Senate Bill 226 and Assembly Bill 1390 to provide clarity to the original law and guidance on groundwater adjudications. This legislation defines sustainable groundwater management as the "management and use of groundwater in a manner that can be maintained during the planning and implementation horizon without causing undesirable results" [Water Code § 10721(u)]. The legislation provides for financial and enforcement tools to carry out effective local sustainable groundwater management through formation of Groundwater Sustainability Agencies (GSA's) consisting of local public agencies, water companies regulated by the CPUC and mutual water companies. The legislation requires that GSA's within High and Medium Priority basins under the California Statewide Groundwater Elevation Monitoring (CASGEM) program subject to critical conditions of overdraft prepare and submit a Groundwater Sustainability Plan (GSP) for the basin by January 31, 2020 [Water Code § 10720.7(a) (1)], and requires GSA's in all other groundwater basins designated as High or Medium Priority basins to prepare and submit a GSP by January 31, 2022 [Water Code § 10720.7 (a) (2)]. Following State approval, the basin would thereafter be managed under the GSP. Cal Water plans to work with other stakeholders in basins from which Cal Water pumps water to do what is best for sustainably managing that basin. This includes equitable sharing of costs and benefits. Cal Water recognizes the technical, legal, political, economic and financial challenges of the legislation and intends to take an active role in the local and state-wide management of groundwater resources over the next 25+ years. Specific steps that the Company intends to take include (among others): • Outreach to public agencies to ensure that Cal Water's presence, rights and interests, historical and current resource concerns are incorporated within the GSA and GSP formulation processes; • Outreach to local and regulatory agencies to ensure Cal Water's participation in meeting requirements and expectations set forth by SGMA; • Enhanced use of digital/electronic groundwater monitoring equipment and other new technology for measuring withdrawal rates, pumping water levels, and key water quality parameters within the context of day-to-day operations; • Full participation in the development of GSP's and formulation of groundwater models being constructed in basins from which groundwater is pumped; • Full participation in individual and/or joint projects aimed at mitigating seawater intrusion, overdrafting and other problems; • Including groundwater management principles and data in all applicable technical reports, studies, facility master plans, and urban water management plans (including the 2015 UWMP update), particularly as these undertakings relate or pertain to water resource adequacy and reliability; 32 • Including groundwater management principles and data in all general rate case (GRC) filings and grant applications to ensure that resource management objectives remain visible and central to Cal Water's long-term planning/budgeting efforts; UWMPs prepared by Cal Water over the past decade, including 2015, contain many of the elements required by SGMA and thus will be useful for implementation of SGMA and the basin GSP. Table 9 shows the volumes pumped by Cal Water from the sub -basin over the past 5 years. LAS District Capital Improvements Program Cal Water has an ongoing capital improvements program for the LAS District. It assesses the operational condition and useful life of all of its wells, their production output and water quality to ensure compliance with state drinking water standards. The program includes repair, rehabilitation, replacement and development of new wells in order to ensure a reliable production capacity to meet 100% of average annual daily demand with sufficient reserve production capacity in the event several large production wells are non -operational for maintenance or other reasons. Capital improvements projects for a three year period are submitted to the CPUC for review and approval. In its general office in San Jose, Cal Water has a large multi -disciplinary engineering department and water quality department that works with the LAS District staff in implementing projects and ensuring their operational readiness on a timely basis. Supply Adequacy and Reliability Assessment This section summarizes previously presented information on projected demand and supplies for the LAS District to address the question of whether its supplies are adequate and reliable for the next 20 years for normal hydrologic conditions, one dry year and a multiple dry year period. Note that supply always equals demand due to the fact that Cal Water varies its groundwater production in response to the availability of SCVWD purchased water. Figure 7 compares annual rainfall from 1985 to 2015 (30 years) to the historic average (16.44 inches). A normal hydrologic year occurred in 1927 when precipitation was approximately 0.2 percent below the historic average for the period from 1903 to 2015. 33 Figure 7: LAS District Annual Rainfall IIIIIIII! Rainfall �5-yr Moving Average ■■■■■■■■■■■■■■■■■■■■■■■■ ■■■ 1M■■■■■■1E■■■■■9■I I■■7 I■■■ ■■■ m■■■■■ IMI I■■ I■■■ ■ III==== ■■I I I I■ IMI III== IN 7■■■■ ■ I I I I■ I■9 IIff, mm 11 IN ■7 INN I I IF IW■ l l� i ■I it ■ MI jut LIME �■ ■I �■ I■I.■lil ■I an ■111111 IN l ■ I■ NMI L■11 i■J■■■■I ■■ ■■� �■ SOURCE: PRISM Climate Group, Oregon State University, http://prism.oregonstate.edu, created Feb 2016 The single -dry and multi -dry base years for drought planning shown in Table 10 are based on the designations of SCVWD. Historically, Non -Contract water has supplied a large portion of the LAS District total supply requirements. However, this source is not considered a normally available supply. Non - Contract water deliveries have a five year average of 3,368 AF, which is 22 percent of the total supply to the Los Altos District for this period. Non -Contract water will be the first source of 34 Year Type Base Year Available % of avg supply Average Year 1927 14,872 100% Single -Dry Year 1977 14,872 100% Multiple -Dry Years 1st Year 2013 13,015 87.5% Multiple -Dry Years 2nd Year 2014 9,660 65% Multiple -Dry Years 3rd Year 2015 11,735 76.5% Historically, Non -Contract water has supplied a large portion of the LAS District total supply requirements. However, this source is not considered a normally available supply. Non - Contract water deliveries have a five year average of 3,368 AF, which is 22 percent of the total supply to the Los Altos District for this period. Non -Contract water will be the first source of 34 supply to be eliminated and acts as a buffer for a single dry year or multi-year drought. During multiple dry years, decreased purchased water is made up by pumping stored groundwater. According to SCVWD's UWMP, if reductions in SWP and CVP deliveries occur due to drought events, the diversion of water to percolation ponds will be curtailed first, followed by agricultural deliveries, and finally urban water deliveries. When this happens an increased reliance will be put on production from stored groundwater, which increases during years of surplus surface water deliveries. Because of this policy, SCVWD anticipates that it will be able to meet its retail urban water demands by shifting supply sources even during multiple dry year periods. Tables 11, 12, and 13 are reproduced from the SCVWD May 17. 2016 update of their 2015 UWMP, and show respectively the average, single -dry, and multi -dry year available supplies, demands, and surpluses or shortages. The tables include all supplies available to the LAS District, including groundwater, which is managed by SCVWD. The LAS District assumes that its future supplies will be subject to the same percentage shortages as shown in Tables 12 and 13. Should shortages occur, Cal Water would more aggressively implement its demand management programs and requirements. 11: SCVWDTable Average Supplies and Demands Supplies 2020 2025 2030 2035 2040 Natural Groundwater Recharge 60,900 60,900 60,900 60,900 61,000 Local Surface Water 78,600 85,600 89,700 92,400 93,400 Recycled Water 23,300 28,500 31,900 33,100 33,500 Potable Reuse - 20,200 20,200 20,200 20,200 San Francisco Public Utilities Commission 56,400 57,600 57,800 58,000 58,500 CVP and SWP Allocations 171,000 175,300 175,300 175,300 175,300 Sum 390,200 428,100 435,800 439,900 441,900 Demands 371,200 1 391,300 408,600 425,800 1 435,100 Difference 19,000 36,800 27,200 14,100 6,800 Percent Shortage -- -- -- -- -- 35 Table 12: 1 Single Dry Year Supplies and Demands Supplies 2020 2025 2030 2035 2040 Natural Groundwater Recharge 47,500 47,500 47,500 47,500 47,500 Local Surface Water 6,000 16,600 18,600 19,100 19,000 Recycled Water 23,300 28,500 31,900 33,100 33,500 Potable Reuse - 20,200 20,200 20,200 20,200 San Francisco Public Utilities Commission 55,900 57,100 57,200 57,500 57,900 CVP and SWP Allocations 73,600 73,600 73,600 73,600 73,600 Transfers 6,000 12,000 12,000 12,000 12,000 Reserves 158,300 135,400 147,000 162,100 144,800 Supply Total 370,700 390,800 407,900 425,000 408,500 Demands 370,600 390,800 407,900 425,000 434,300 Difference 0 0 0 0 -25,800 Percent Shortage -- -- -- -- 6% Table 1 Multiple Dry Year Supplies and Demands 2020 2025 2030 2035 2040 First Year (2013) Supply Totals 370,800 391,000 408,200 425,200 434,700 Demand Totals 370,800 391,000 408,200 425,200 434,700 Difference -- -- -- -- Percent Shortage -- -- -- -- -- Second Year (2014) Supply Totals' 330,900 389,300 377,600 363,200 354,900 Demand Totals 370,600 390,900 407,900 424,800 434,300 Difference -39,700 -1,600 -30,300 -61,600 -79,400 Percent Shortage 11% 0% 7% 15% 18% Third Year (2015) Supply Totals' 257,500 331,200 307,200 275,800 256,800 Demand Totals 370,500 390,700 407,800 424,700 434,100 Difference -113,000 -59,500 -100,600 -148,900 -177,300 Percent Shortage 30% 15% 25% 35% 41% SCVWD notes that supply totals in Tables 12 and 13 are based on its current supply and infrastructure and that: 36 "The District plans to update its Water Master Plan in 2017. As part of the planning process, the District will evaluate supply projects and programs to minimize the need to call for water use reductions greater than 10 percent." Normal Hydrologic Year In normal hydrologic years, Non -Contract water is expected to be available. Cal Water also expects increases in approved SCVWD deliveries will eventually reduce availability of Non - Contract water. According to the SCVWD 2012 WIP, LAS District projected water scheduled delivery amounts will be available through at least 2035. As previously indicated, the LAS district has historically pumped only a fraction of its total annualized well capacity, leaving the balance in groundwater storage. Because of this banking practice, there is an adequate supply of stored groundwater in the aquifers supplying LAS district wells. As shown in Table 14, projected supplies are adequate to 2040. Table 14: LAS District 2010 Normalpp 2015 2020 2025 Demand 2030 Comparison 2035 2040 Supply 11,648 10,188 14,336 14,518 14,795 14,957 15,150 Demand 11,648 10,188 14,336 14,518 14,795 14,957 15,150 Difference 0 0 0 0 0 0 0 Sinale Dry Year For a single dry year, Cal Water expects a reduction in Non -Contract water but not in firm scheduled deliveries. Pumping restrictions in the Delta could have a greater impact on imported supplies during a single dry year. But if any reduction in scheduled deliveries occurs, the needed supply would come from pumping stored groundwater. SCVWD maintains carryover storage in its reservoirs, locally stored groundwater reserves, and has access of up to 50,000 AFY of drought supplies stored as groundwater in the Semitropic Groundwater Bank. Although SCVWD's 2010 UWMP indicates a 5 percent shortfall in treated water contract deliveries in 2020 and 2025, SCVWD in 2015 is accelerating its schedule for increasing production capacity of its SVAWPC plant to 32 mgd by 2020. Therefore, with implementation of this plant and other supply projects described in SCVWD's Water Master Plan, it is assumed that there will be sufficient additional supplies so that all urban contract deliveries can be met during single dry years. Recycled water deliveries are not expected to be affected by a single dry year. If purchased water deliveries are reduced, groundwater pumped from Cal Water wells will provide the necessary supply to meet single dry year demand. As shown in Table 15, LAS District projects that it will have adequate supplies to meet demand for a single -dry year. 37 Table 15: Las District Single Dry Year Supply and Demand Comparison (AF) Difference Multiple Dry Year Period SCVWD gives highest priority to delivery of Contract water to urban water retailers and indicates it will be deliver 100% of its contracted supply obligations even during multiple dry year periods after additional supply projects are implemented in 2025. During drought periods, SCVWD will eliminate deliveries of Non -Contract water. If drought conditions are severe enough, SCVWD will reduce or eliminate surface water recharging to aquifers within its service area. If further reductions are necessary, deliveries to agricultural customers will be reduced or eliminated. Deliveries to SCVWD urban water retailers are the last to be affected by drought conditions. Based on SCVWD supplies, policies and plans, Cal Water expects that pending the completion of new supply projects, Contract water may be reduced to the LAS District during a multiple dry year period as shown in Table 16. Because LAS District wells cannot pump more groundwater than authorized by SCVWD, demand reductions will need to be implemented to meet the available total supply. The magnitude of reductions required will depend on the degree and duration of the drought. SCVWD considers its groundwater and imported supplies as one source and does not distinguish between water sources when asking for demand reductions from its retail utilities. Supply in Table 16 is based on Table 13, which shows potentially significant future SCVWD supply reductions. If no demand reduction actions are taken by Cal Water, supplies would be insufficient. However, it is assumed in the WSA that in the 2nd year projected demand can be decreased by up to 22% (year 2040) and in the 3rd year it can be decreased by up to 36% (year 2040). Therefore, while there would be SCVWD supply shortages, Cal Water would be proactive and implement demand reduction measures and programs when SCVWD began projecting reduced supplies. As demonstrated by 2015 demand data, the LAS District achieved reductions beyond the state mandated 32%. Cal Water believes that it can achieve similar reductions if required to match SCVWD drought induced reductions in supplies. 38 Table 1: LAS District Multiple Dry Years Supply1 Demand Comparison 2020 2025 2030 2035 2040 Supply totals 14,336 14,518 14,795 14,957 15,150 First year Demand totals 14,336 14,518 14,795 14,957 15,150 Difference 0 0 0 0 0 Supply totals 12,450 13,941 13,062 12,185 11,792 Second Demand totals 12,450 13,941 13,062 12,185 11,792 year Difference 0 0 0 0 0 Supply totals 10,691 12,884 11,648 10,274 9,563 Third year Demand totals 10,691 12,884 11,648 10,274 9,563 Difference 0 0 0 0 0 Cal Water expects that its LAS District customers will be able to achieve requested reductions in water use. In the LAS District, total annual water use per customer is expected to be lower than in previous dry year periods due to the greater investment in water conservation programs that have been and continue to be implemented. As demonstrated in 2015, the most recent drought year, the response by Cal Water customers in reducing water use was significantly greater than anticipated based on past droughts due to improved water conservation plans, more effective communications on the need to reduce water use and a statewide directive for urban water use reduction from the Governor. Climate Change Cal Water prepared a Climate Assessment Report in 2013 that evaluates potential effects of climate change on the water supplies of its 24 service areas in California. The report identifies adaptation measures that Cal Water may take to address potential decreases in supply quantities or negative changes in source water quality. DWR's Guidebook to Assist Water Suppliers to Prepare a 2010 Urban Water Management Plan, lists topics examined in Cal Water's Climate Assessment Report. Adaptation measures are essentially designed to ensure that projected future supplies are reliable despite adverse changes in existing supply quantity and quality due to climate change. For example, snow in the Sierra Nevada provides 65 percent of California's water supply. Some predictions are that by 2050 the annual Sierra Nevada snow pack will be significantly reduced. Much of the lost snow will be in the form of rain, which will run off during winter and early spring and not be available to be stored as supplies for use during summer. Change in water runoff may significantly reduce groundwater recharge in the Central Valley increasing demands on surface water. 39 DWR continues to work on identifying potential climate change effects on water supplies, water demand, sea level, and occurrence and severity of weather events. Some potential changes are summarized below: Water demand: more hot days and nights and a longer irrigation season will increase agricultural and urban irrigation needs; power plants and industrial processes will have increased cooling water needs. Water supply and quality: increased potential for algal bloom and surface and groundwater chemistry changes; increased potential for seawater intrusion into surface and groundwaters due to elevated seawater levels and more powerful storm surges. Extreme weather events are expected to become more frequent as climate variability increases, resulting in a higher frequency of more extreme droughts and floods. SUMMARY AND CONCLUSION Based on: ■ Existing and planned supplies from SCVWD and LAS District groundwater, ■ Cal Water's ongoing capital improvements program to maintain existing groundwater production capacity and construct new wells to increase well production capacity, ■ Existing Agreements and plans to continue to purchase SCVWD Non -Contract water whenever it is made available and increase basin groundwater storage for use during drought periods, ■ In-place, ongoing and planned expanded water conservation programs and best management practices for reducing existing demand during normal hydrologic years, single dry year and multiple dry years in compliance with SBx7-7, CPUC and MOU requirements, ■ More stringent water conservation requirements for new developments, which will result in lower water use rates than for comparable existing services, ■ Cal Water's historic proven success in obtaining significant reductions in water use during multiple dry years by implementing its demand reduction program, and ■ Over 90 years of experience in continuously providing an adequate supply to meet demands during normal, single and multiple dry years in the LAS District, Cal Water concludes that for the 20 years from 2020 to 2040, the LAS District will have sufficient water supplies to meet the projected demands of the proposed Vallco ASP, those of other development summarized in this WSA and all existing and future projected customers for normal, single dry year and multiple dry year conditions. End of WSA 40 REFERENCES California Water Service Company "Urban Water Management Plan LAS District" Adopted June 2016, 949 B Street, Los Altos, CA 94024 https://www.calwater.com/conservation/uwmp/rd/ 2. California Water Service Company "Urban Water Management Plan LAS District" Adopted June 2011, 949 B Street, Los Altos, CA 94024 https://www.calwater.com/conservation/uwmp/rd/ 3. Santa Clara Valley Water District "2012 Water Supply and Infrastructure Master Plan" October 2012 4. Santa Clara Valley Water District "Wolfe Road Facilities Planning Study Report' December 2014 ATTACHED FIGURES 41 U u 0 ® �lroject Site nN 0 50 100 200 400 Feet �- r 1 280 Bee ace Melody Lane Shasta Drive Pruneri Ja Avenue � CD Z O C Ncr W 7 Z CD 0 O 0 CD 7 C CD o CD Lazaneo Drive :3 D m m CD m C CR 'o Hancock Drive < CD a 'r n� � jWh"tonrive v n V a/eco A 3 a o — m 280 Q Stevens Creel Boulevard D o a odrigues Aven s o CD CD CD � Q D CD CD O ' c O J `D Lal m GGA CD � c Mar Drive n n F---\ VICINITY MAP FIGURE 2 Residential `R Residential Hotel �:,� ��. � - 4 280 1 - -: Apple Campus 2 A. - i ■_�, yea _ � � r� :.3• r=te�- . -� =-�''� �- s Al ,ResidentialJw i I ' 280 a � r --J• ' ,:> � s•., I • r' 1�r��i� Office � �"s Residential ;�I r ------_J • + �'� — I t I I �Mixed-Use`MP T= -Use 7 �; ; _Mixed Use J� Commercial ' Y. fl`, Y I Office L________ -Js, Co • - Commercial z, Residential Commercial _ ��•:-' �Gommercial --- Project Boundary N ' 0 100 500 1000 Feet Aerial Source: Google Earth Pro, Jan. 12, 2018. Photo Date: Apr. 2017 AERIAL PHOTOGRAPH WITH SURROUNDING LAND USES FIGURE 3