4.8 Utilities

SECTION 4.8: UTILITIES

4.8 UTILITIES

Introduction This section describes existing conditions (including regulations) relating to utilities occurring or potentially occurring in the Corridor Plan Area, and potential impacts to water supply, wastewater, and solid waste services that could occur with implementation of the Corridor Plan and the Bay Meadows Specific Plan Amendment (Bay Meadows project). Mitigation measures for any significant impacts are also identified. This assessment was prepared using information obtained from utility providers in the project area and published documents pertaining to the project area.

Throughout the existing conditions section, discussion of the Corridor Plan Area includes the Bay Meadows project site. Therefore, the terms “project area” and “project location” refer to both the Corridor Plan Area and the Bay Meadows project site. However, a separate discussion of existing conditions and impacts and mitigation measures associated with the Bay Meadows project is provided.

Existing Conditions

Corridor Plan Area

Water Supply

California Water Service Company (Cal Water) The project area is within the City of San Mateo, which receives water service from the California Water Service Company (Cal Water). The City is within Cal Water’s Mid-Peninsula District, which serves more than 120,000 people in the cities of San Mateo and San Carlos, including over 31,000 residential and nearly 4,000 commercial connections. Within the Cal Water service area, single-family and multi-family residences account for 87.8 percent and 1.6 percent of water connections, respectively, and commercial connections total 9.3 percent. Industrial, government, and construction uses are small, at 1.3 percent (Cal Water, 2003b).

The Cal Water system comprises 41 storage tanks with a combined storage capacity of up to 21.2 million gallons of water and over 358 miles of mains for water delivery. Most of the City’s existing water system was installed in the 1950s and 1960s, while portions of the Hillsdale Boulevard system were replaced in the 1970s. Under normal conditions, the pressure of the system is 55 pounds per square inch (psi). Presently, the City's water supply is considered sufficient to meet the current demand, which averages 16.9 million gallons of water per day (Cal Water, 2003b).

San Francisco Public Utilities Commission Agreement Cal Water’s Mid-Peninsula District is 100 percent dependent on imported surface water purchased from the San Francisco Public Utilities Commission (SFPUC) under a 25-year contract (Cal Water, 2003a). SFPUC

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-1 EDAW, Inc. SECTION 4.8: UTILITIES receives its water from the Hetch-Hetchy system, the Tuolumne Basin, and various local sources, and serves the City of San Mateo through connections in the northwest region of the City.

Cal Water’s contract with the SFPUC accounts for Cal Water's purchases by its three peninsula districts: the Bear Gulch District, Mid-Peninsula District and South San Francisco District. The contract with SFPUC allows Cal Water to purchase up to 47,400 acre-feet (AF) of water per year for all three peninsula districts. This amount was set based on the SFPUC's locally generated supply, since the Raker Act, which authorized the construction of the Hetch-Hetchy Project, excludes investor-owned utilities like Cal Water from purchasing water produced by the Hetch-Hetchy Project. Based on current demand conditions, the five-year average purchased water demand is 39,142 AF, which indicates some water remains available within the original contractual allocation (Cal Water, 2003a).

The contract with the SFPUC was amended in 1984 with the adoption of the Supplemental Agreement and Master Sales Contract. This agreement called for the development of a Supply Assurance Allocation (SAA) for all SFPUC suburban customers. The SAA allocates to these customers the available supply of 206,106 acre-feet per year (AFY) as a maximum annual average metered supply. This allocation was reached through negotiation in the early 1990s between the SFPUC and the Bay Area Water Users Association (BAWUA), an association of the suburban customers of the SFPUC. Cal Water’s SAA for its collective systems is 39,642 AFY.

Dry Year Water Supply For single dry and multiple dry years, Cal Water uses SFPUC's Urban Water Management Plan (UWMP) information to estimate the availability of supply over a 20-year projection since the current source of all water to the Mid-Peninsula system is the SFPUC. During a single dry year, SFPUC anticipates a supply of 90 percent of normal supply. For multiple dry years, SFPUC anticipates a supply of 90 percent of normal supply for the first year and 80 percent of normal supply for each subsequent year (Cal Water, 2004).

Experience has shown that cumulative dry years in a developed area like the San Francisco Bay Area do not result in a progressively greater annual demand for water as the dry period continues, beyond the second year. The region is mostly developed with urban uses that are comparatively resistant to dry climatic periods in terms of their water demands. Historical records indicate that residential, commercial and industrial uses generally will use the same amount of water during droughts as normal years, with perhaps an increase in irrigation for landscaping, however in multiple dry years, irrigation water use is substantially decreased (City of San Mateo Public Works Department, 2004). Therefore, in a single dry year Cal Water would be allocated 35,678 AFY (39,642 x 90%), and during subsequent multiple dry years, Cal Water would be allocated 31,714 AFY (39,642 x 80%) (Cal Water, 2004).

The ten-year average total annual purchase from SFPUC is 37,234 AFY, and the five-year average is 39,142 AFY. Both the ten-year average and the five-year average are below Cal Water’s annual SAA for its

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-2 EDAW, Inc. SECTION 4.8: UTILITIES collective Peninsula systems of 39,642 AFY. However, they exceed the anticipated supply during single and multiple dry years. During each of the last three years Cal Water's purchases were in excess of the SAA of 39,642 AFY, by amounts ranging from 326 AFY to 1,787 AFY (Cal Water, 2003a; Cal Water 2004).

BAWUA’s Interim Water Shortage Allocation Plan BAWUA has developed an Interim Water Shortage Allocation Plan (IWSAP) that allocates water between its member water agencies during supply shortages. The allocation is based on the SAA and past and current demand levels. Under the IWSAP, water agencies that are exceeding their SAA could face cutbacks greater than the overall requested cutbacks. For example, if a supply shortage emergency prompted a 20 percent reduction in overall supply, then Cal Water, which exceeded its SAA over the last three years by two to three percent, would probably face a reduction in the order of 23 or 24 percent rather than 20 percent.

If a water agency continued to take excess allocations during a declared shortage period, it would be subject to an Excess Usage Charge. Depending on the amount by which the allocation is exceeded, the Excess Usage Charge could be double or triple the amount being paid for the allocated water.

The IWSAP also permits transfer of shortage allocations. The cost of these shortage allocations would be negotiated between the two parties conducting the transfer. The cost would likely be lower than any Excess Usage Charge (or else the purchasing water agency would have no incentive to purchase from the other selling agency), however it could still be quite expensive. Customers needing additional supplies in excess of their SAA to meet future demands would be required to pay for the additional supply at the full cost of development. If obtained from the SFPUC, based on the SFPUC's Master Plan from 2000, such future supplies would cost approximately $800 per acre-foot (Cal Water, 2004).

Future Supply Plans and Sources Cal Water is investigating development of a local water supply to reduce their reliance on SFPUC supplies and to supplement supply for redevelopment projects. Moreover, developing a local supply will cost much less than paying to develop additional imported supplies (Cal Water, 2003a).

Cal Water intends to develop sufficient local sources to generate an amount of water equal to 10 percent of the total system demand, which would amount to approximately 1,900 AFY. To this purpose Cal Water has budgeted the drilling of a test well in the Mid-Peninsula District service area. The assessment of the planned test well will take nearly one year to complete. If a sufficient groundwater supply is detected, then it would take another year to drill, develop and equip the well, with an additional year required for constructing any necessary water treatment facilities. In total, an additional water supply could be provided within two to three years (Cal Water, 2004).

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Water Planning The following water supply data are based upon a Water Supply Assessment prepared by Cal Water and subsequent communications with Cal Water. The City of San Mateo requested that Cal Water prepare a Water Supply Assessment in accordance with Senate Bill 610 (SB 610). SB 610 amended existing California land use and water supply law by requiring that water retail providers like Cal Water demonstrate that sufficient and reliable supplies are available to serve large-scale developments prior to completion of the environmental review for such projects. Specifically, SB 610 requires that a Water Supply Assessment include an inventory of the water provider’s total projected supplies and address whether those supplies will be available during normal, single-dry, and multiple-dry years during a 20-year projection, and also evaluate whether that projected available water would satisfy the demand of the proposed project; given present and planned future uses. Therefore, the Water Supply Assessment projects the available water supply through 2023, although other environmental impacts in this EIR are considered through 2020. The Water Supply Assessment prepared by Cal Water in accordance with SB 610 is provided in Appendix E.1

Historical Demand Cal Water estimated the historical water demand in the project area over a 20-year period. The existing uses include residential, commercial and racetrack uses. The estimated historical total annual water demand for the current land uses within the Corridor Plan area, excluding Bay Meadows, is 101.9 AFY. The actual historical annual demand used by Bay Meadows is 176.5 AFY. Thus, the total estimated historical annual demand for the Corridor Plan Area is 278.4 AFY.

Wastewater Existing wastewater collection and treatment within the Corridor Plan Area is provided by the City of San Mateo. The San Mateo Wastewater Treatment Plant (SMWTP) is located at 2050 Detroit Drive near J. Hart Clinton Drive at the Marina Lagoon. The plant provides sewage treatment to the City of San Mateo and the Estero Municipal Improvement District (EMID), including Foster City, the southern portion of Hillsborough, a small area of Belmont, and the Crystal Springs County Sanitation District (unincorporated areas).

The City's underground collection system comprises 260 miles of sanitary sewer lines and 75 miles of storm drains. Storm drains typically flow to the nearest creek or watercourse. Indoor waste drains are connected to a network of sewer lines that flow into a wastewater treatment plant where the waste is treated before it is discharged into the San Francisco Bay. The City's wastewater treatment plant has been in operation since 1935 and treats an average of 12.1 million gallons per day (mgd). Approximately 7.5 dry tons of biosolids (sludge) are removed from the plant process each day (City of San Mateo, 2003a). The SMWTP has a rated

1 Additional related materials, including Cal Water’s UWMP, are available in the project case file at the City of San Mateo Planning Division.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-4 EDAW, Inc. SECTION 4.8: UTILITIES flow capacity of 15.7 mgd (City of San Mateo, 2003b). For dry weather conditions, the treatment plant has adequate flow capacity for existing flows.

Primary and secondary treatments are provided before effluent is discharged into the deep waters of San Francisco Bay near the San Mateo Bridge. In the summer, the plant also provides advanced secondary treatment. The plant and the Dale Avenue Pump Station were recently upgraded to increase their capacity to provide adequate service for development anticipated through 2005 (City of San Mateo, 2003c).

The project area is located in the Southern Trunk System. The Southern Trunk System is defined as that portion of the system that drains to the Dale Avenue Pump Station from the south. It includes the Mongini Pump Station that conveys flows from the Saratoga Drive Trunk Sewer flows to the Dale Avenue Pump Station. The majority of this flow is conveyed to the Dale Avenue Pump Station via a 39-inch trunk sewer line that crosses Highway 101 at the end of East 16th Avenue and parallels the east side of the highway to an easement west of the Dale Avenue Pump Station. The Dale Avenue Pump Station pumps flow directly to the City’s Wastewater Treatment Plant.

Rainfall-dependent infiltration/inflow (RDI/I) creates capacity problems within the system. During storm events, rainwater infiltrates the system, resulting in higher wastewater flows. The RDI/I rainfall percentages for the Southern Trunk System range from 4 to 30 percent, with the highest values found in the San Mateo Village area. The highest values found outside the San Mateo Village area average 13 percent, while the southern trunk system as a whole averages 9 percent. This percentage is comparable to other communities of similar age in the Bay Area. However, a 9 percent rainfall percentage represents a large volume of extraneous water entering the sewer system and can have a significant impact on the system resulting in overcapacity conditions.

The facilities of primary concern for the Southern Trunk System are described below.

Delaware-Dale Trunk System The Delaware-Dale trunk system flows by gravity to the Dale Avenue Pump Station, which discharges most of San Mateo's sewage, about half of Hillsborough's flows, and all of the Crystal Springs Sanitation District's contributions to the SMWTP. The Delaware-Dale trunk system consists of a 39-inch sewer that extends from the Dale Avenue Pump Station sewer easement, paralleling Highway 101 on its east side, crossing under Highway 101 to East 16th Avenue, and following East 16th Avenue, South Grant Street, and Vanessa Drive to Delaware Street.

Delaware-Bay Meadows Trunk The Delaware-Bay Meadows trunk consists of a 24- to 36-inch diameter sewer that connects to the Delaware- Dale Avenue trunk. The sewer extends south along Delaware Street from the Vanessa Drive easement, extending along the western edge of the Bay Meadows Racetrack, and crosses the railroad tracks to El

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Camino Real at Hillsdale Boulevard. This trunk sewer receives a portion of the flow from the Santa Clara Pump Station. The Santa Clara Pump Station serves the San Mateo Village area and trunk sewers in West Hillsdale Boulevard and El Camino Real south of Hillsdale Boulevard.

Saratoga Drive Trunk The Saratoga Drive sewer is a new 18- and 24-inch sewer constructed as part of the Bay Meadows Phase I development. The sewer extends south from the Mongini Station along Pacific Boulevard and Saratoga Drive to East Hillsdale Boulevard. It primarily serves the Bay Meadows Phase I development, but conveys some flows from the Santa Clara Pump Station. Flows through this trunk are discharged to the Mongini Pump Station.

Mongini Pump Station The pump station conveys flows from the Saratoga Drive trunk sewer, the Bay Meadows Racetrack, the County Exposition Center, and the Fiesta Gardens area to the Delaware-Bay Meadows trunk.

Railroad-El Camino Trunk

The Railroad-El Camino trunk consists of a 15- to 21-inch sewer extending from the 16th Avenue drainage channel along the railroad tracks, Leslie Street, Palm Avenue, 21st Avenue, and El Camino Real to Hillsdale Boulevard. Due to previous overflow problems in this portion of the trunk, the City constructed a 30-inch relief sewer to parallel the section of the trunk between Concar Drive and 21st Avenue as well as a new 30- inch sewer along Concar Drive to divert a portion of the flow from the Railroad-El Camino trunk to the Delaware-Bay Meadows trunk.

Solid Waste Browning-Ferris Industries (BFI) provides solid waste disposal and recycling services to the City of San Mateo. The City has a franchise agreement with BFI for solid waste disposal until 2008. Household and non-hazardous solid waste from the City is transported to the BFI Transfer Station in San Carlos and then to the Ox Mountain Landfill in Half Moon Bay, approximately 15 miles west of the project area. Construction and demolition debris is non-franchised and may be disposed of at other landfill facilities in the region such as Zanker Road, Keller Canyon, or Altamont landfills. Contaminated wastes are transported to the Novato or Kettlemen Landfills. Hazardous wastes such as motor oil, motor oil filters, used antifreeze, and latex paint are accepted at the San Carlos Bayside Transfer Station. The Ox Mountain Landfill, owned and operated by BFI, has a permitted throughput of 3,598 tons/day and remaining capacity of 44.6 million cubic yards (CIWMB, 2003). The landfill received approval to expand in 2002 and now has estimated remaining capacity to last until the year 2028 (Gasparini, 2003).

The California Integrated Waste Management Act, also known as AB 939, requires that each city and county in California reduce the amount of waste disposed to the landfill by 50 percent from 1990 levels by the year

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2000, and to maintain the 50 percent level thereafter. Municipalities face penalties up to $10,000 per day for failure to comply. This act further required every city and county in California to prepare a Source Reduction and Recycling Element (SRRE). The SRRE describes the chief characteristics of each jurisdiction's waste, existing waste diversion programs and rates of waste diversion, and the new or expanded programs the jurisdiction intends to implement to achieve the mandated rates of diversion.

The California Integrated Waste Management Board (CIWMB)-approved diversion rates for the City of San Mateo range from 29 to 40 percent between the years of 1995 to 1999 (CIWMB, 2003). The preliminary diversion rates for 2000 and 2001 totaled 39 percent and 33 percent, respectively, but those rates have not been approved by the CIWMB as of this date. Rates for 2002 have not been compiled. The City has submitted an application for time extension with the CIWMB for another three years to meet the 50 percent goal. Diversion rates were achieved under the guidance of several waste management plans addressing waste reduction and recycling. The City has a long-term recycling agreement with BFI, which currently recycles mixed paper, newsprint, cardboard, glass bottles, aluminum cans, and #1 and #2 plastic bottles. Since January 1997, the City has operated a yard waste program for its residential customers. The City also has a Recycling and Salvaging of Construction and Demolition Debris Ordinance (Municipal Code Section 7.33).

Bay Meadows Project Site

Water Supply Water supply is provided to the Bay Meadows project site by Cal Water. Water distribution mains in the project site vicinity include an 8-inch main in Annapolis Drive, a 12-inch main in Saratoga Drive, a 12-inch main in Hillsdale Boulevard, and a 24-inch main in Delaware Street, west of the project site (Bay Meadows 2003; Calthorpe, 1997). Information related to water supply is the same as presented in the Corridor Plan Area setting section, above.

Wastewater Similar to the Corridor Plan Area, existing wastewater collection and treatment is provided by the City of San Mateo. Existing collection facilities that development proposed by the Bay Meadows project would connect to include the 15-inch Main Track collector, the 18-inch Saratoga Drive trunk line, the 24- to 33-inch Delaware-Bay Meadows trunk line and an 18- to 21-inch main trunk sewer in Norfolk Street. Wastewater facilities common to the Bay Meadows site and Corridor Plan Area are the Saratoga Drive and Delaware-Bay Meadows trunk lines and Mongini Pump Station. Similar to the Corridor Plan Area, wastewater facilities in this area suffer from overcapacity conditions resulting from Rainfall Dependent Infiltration/Inflow (RDI/I).

Main Track Collector The Main Track collector runs through the San Mateo Exposition Center property. This collector receives flow from the Expo Center, a portion of the City’s nearby Corporation Yard, and the barn area of the racetrack. All flows from the project site ultimately discharged to the Delaware-Bay Meadows Trunk sewer

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-7 EDAW, Inc. SECTION 4.8: UTILITIES north of the Saratoga/Delaware Street intersection, either through gravity or through the Mongini Pump Station.

Saratoga Drive Trunk The Saratoga Drive trunk extends along Saratoga Drive and passes underneath the Delaware-Bay Meadows trunk line, discharging to the Mongini Pump Station. This trunk line receives flow from the Franklin Resources Campus and Bay Meadows Phase I (adjacent to the project site to the east), in addition to receiving a portion of the discharge from the Santa Clara Pump Station.

Railroad-El Camino Trunk The Railroad-El Camino trunk serves as a main trunk line for the area west of El Camino Real, including the area served by the Hillsdale Boulevard collector. The Railroad-El Camino trunk flows north along the Joint Powers Board (JPB) Railroad property, joining the Delaware trunk system at 16th Avenue and discharging to the Dale Avenue Pump Station via a 39-inch sewer line located under Highway 101. Sewage laterals from the area between El Camino and Delaware Street connect to the 8-inch El Camino collector. Although this trunk line is located in the area, based on existing information, it is not thought to convey flows from the Bay Meadows area (BMLC, 2002).

The Railroad-El Camino trunk has had previous overflow problems. To help resolve these problems, the City constructed a 30-inch relief sewer to parallel the section of the trunk between Concar Drive and 21st Avenue as well as a new 30-inch sewer along Concar Drive to divert a portion of the flow from the Railroad- El Camino trunk to the Delaware-Bay Meadows trunk.

Delaware-Bay Meadows Trunk The Delaware-Bay Meadows trunk extends along the eastern edge of the railroad line and into Delaware Street. This trunk line collects flows from an 845-acre catchment from South San Mateo. It also receives flows from the Santa Clara Pumping Station and from the Mongini Pumping Station discharge and laterals from Fiesta Gardens. All flows from the project site currently discharge to the Delaware-Bay Meadows trunk line.

Norfolk Street System This 12- to 24-inch sewer runs from Los Prados, parallel to and east of Highway 101 along Norfolk Street. It ultimately drains to the Dale Avenue pumping station. This system is hydraulically separate to the Delaware/El Camino/Saratoga sewer and serves the Los Prados—Shoreview area. The Norfolk Street system also suffers from RDI/I.

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Mongini and Santa Clara Pump Stations The Mongini Pump Station was upgraded several years ago. Improvements were sized for a peak flow rate of 2,400 gpm, which includes an expansion of 1,250 gpm and 1,150 gpm from future developments in the tributary area. A 10-inch force main discharges to the Delaware-Bay Meadows Trunk. The Santa Clara Pump Station has a flow capacity of 3,300 gpm. Sewage flow from the area south of Franklin Parkway discharges into the Santa Clara Pump Station. The flow is pumped to the Hillsdale-Saratoga Junction, where a box splits the flow between the Saratoga Drive trunk and the Delaware-Bay Meadows trunk. It is unknown whether there is excess capacity in the pump station for additional future flow. Based on the design of the Saratoga Trunk, design flows are estimated as 2,400 gpm for the 18-inch McLellan force main and 900 gpm for the 18-inch Saratoga trunk (BMLC, 2002).

Solid Waste Solid waste collection services are provided citywide by BFI. Existing setting information related to solid waste is the same as presented in the Corridor Plan Area setting section.

Relevant Regulations and Plans

City of San Mateo General Plan The City of San Mateo General Plan (General Plan) is a comprehensive, long-term plan for the physical development within the City. The Land Use Element of the General Plan contains the following goals and policies related to utilities:

Goal 1e: Provide adequate transportation, utilities, cultural, educational, recreational, and public facilities, and ensure their availability to all members of the community. Establish San Mateo as the cultural center of San Mateo County.

Goal 4a: Facilities. Seek to provide a safe and predictable supply of water, and provide storm drainage, sewer and flood control facilities adequate to serve existing needs, the projected population and employment growth and to reduce the associated life safety and health risks to acceptable levels.

LU 4.3: Location of Critical Facilities. Avoid locating critical facilities, such as hospitals, schools, fire, police, emergency service facilities and utilities in areas subject to slope failure, flooding and other hazards as identified in the Safety Element, where feasible.

LU 4.4: Water Supply. Seek to ensure a safe and predictable water supply system for existing and future development by taking the following actions: 1. As a high priority, work with California Water Company and Estero Municipal Improvement District and adjacent jurisdictions to develop supplemental water sources. 2. Strongly encourage water conservation by implementing pro-active water conservation methods, including requiring all new development to install low volume flush toilets of 1.6 gallons, low-flow shower heads and utilize drip irrigation and establishing an education program to inform the public of the water issue.

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3. Investigate the feasibility of developing reclaimed water facilities or ground water that will enable reuse of water for irrigation purposes, freeing comparable potable water supplies for other uses.

LU 4.5: Wastewater Treatment Plant Expansion. Provide adequate wastewater treatment for the projected 2010 service area population, employment and development. Require that any future expansion of the WWTP be designed to be compatible with the adjacent parks, school, and low-density residential areas by screening views of the WWTP with extensive and tall landscaping and reducing the height of all new structures to the maximum practicably feasible.

LU 4.6: Inter-Agency Coordination. Coordinate future expansion or modification of the Wastewater Treatment Plant with the other users of the plant including the Estero Municipal Improvement District (Foster City), the Crystal Springs Country Sanitation District, Hillsborough and Belmont.

LU 4.7: Sewer System. Provide a sewer system which safely and efficiently conveys sewage to the Wastewater Treatment Plant by taking the following actions: 1. Comprehensive Sewer System Study. As a high priority conduct a comprehensive sewer system study to assess the efficiency and integrity of the sewer lines and facilities, and develop a Capital Improvement Program to make any necessary improvements. 2. Sewer Requirements for New Development. Prior to the completion of the Comprehensive Sewer System Study require new major multi-family and commercial developments to evaluate the main sewer lines in the project vicinity which will be utilized by the new development and make any improvements necessary to convey the additional sewage flows.

LU 4.16: Service Improvement and Expansion. Seek to ensure adequate gas, electric and communication systems to serve existing and future needs while minimizing impacts on existing and future residents by taking the following actions:

1. Underground electrical and communication and transmission and distribution lines in residential and commercial areas as funds permit. 2. Require all new developments to underground lines and provide underground connections when feasible.

LU 4.27: Peakload Water Supply. Seek to ensure that the California Water Service Company and the Estero Municipal Improvement District provide and maintain a water supply and distribution system which provides an adequate static pressure to deliver a minimum fire hydrant flow of 2,500 gallons per minute to all areas of the City, except where a lesser flow is acceptable as determined by the Fire Chief. Ensure that new development does not demand a fire flow in excess of that available.

LU 4.31: Solid Waste Disposal. Continue to support programs to reduce solid waste materials in landfill areas in accordance with State requirements.

LU 4.32: Recycling. Support programs to recycle solid waste in compliance with State requirements. Designate an area on a site plan for new multi-family developments exclusively for recycling.

LU 4.33: Waste Management. Manage toxic and hazardous wastes by following the goals and policies contained in the Safety Element.

LU 5.1: Inter-Agency Cooperation. Promote and participate in cooperative planning with other public agencies and adjacent jurisdictions, especially regarding regional issues such as water supply, traffic congestion, rail transportation, air pollution, and waste management.

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In addition to these goals and policies, San Mateo County has also completed a Comprehensive Water Resources Management Plan, including provisions for emergency supply and discussing alternative water sources such as reclaimed water (City of San Mateo, 1997). This plan confirms that SFPUC will be the sole provider of water to the City of San Mateo, and details the City’s current and projected water allocations.

Impacts and Mitigation Measures

Significance Criteria In accordance the California Environment Quality Act (CEQA), the proposed Corridor Plan and the Bay Meadows project would have a significant impact to utilities if they would:

• Exceed wastewater treatment capacity of the applicable Regional Water Quality Control Board; • Require or result in the construction of new water, storm water drainage, or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects; • Result in insufficient water supplies in normal, dry, and multiple dry years to serve the project from existing entitlements and resources, or require new or expanded entitlements; • Result in the determination by a wastewater treatment provider that serves or may serve the project that it does not have adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments; • Result in insufficient permitted capacity to accommodate the project’s solid waste disposal needs at the landfill serving the project; or • Violate federal, State, and local statutes and regulations related to solid waste.

Methodology The impact analysis focuses on potential effects to utilities associated with implementation of the proposed project. Evaluation was made with available information regarding utilities and projections of the changes that would occur as a result of the proposed projects.

Because the proposed Corridor Plan does not define specific future development activities within the project area, but rather allows for and encourages specific types of development up to a defined maximum buildout, impacts were determined based on the maximum potential development allowed under the proposed project (Scenario Z).

The proposed Bay Meadows project would eliminate existing Bay Meadows racetrack operations and could result in the complete redevelopment of the site with a maximum of 2.1 million gross square feet (gsf) of office space, 1,500 residential units, 100,000 gsf of retail space, and 29.5 acres of open space (of which 15.6 acres would be devoted to parks and public plazas). Impacts were therefore determined based on the

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-11 EDAW, Inc. SECTION 4.8: UTILITIES maximum potential development allowed under the proposed project and mitigation measures were developed to mitigate for the level of development possible. Similar to the Corridor Plan, the residential units, office space, and retail space represent the maximum that could be built; depending on market conditions, fewer of any and or/all of these uses could be built. For the purposes of analysis in this EIR, the maximum figures are assumed to be the proposed project.

Impacts for the Corridor Plan and the Bay Meadows project are provided below separately.

Corridor Plan Impacts and Mitigation Measures

Water Supply Impact Utilities-CP1: Implementation of the proposed Corridor Plan (Scenarios A and Z) would increase residential and commercial land uses in the project area, resulting in an increase in demand for water. This would be a significant impact.

The Corridor Plan would allow for a range of new residential and commercial development by 2020. The increase in residential units and commercial space would generate increased numbers of people within the City boundaries and would increase demand for water supply.

Cal Water prepared a Water Supply Assessment for the Corridor Plan on December 18, 2003.2 Cal Water estimated the historical and anticipated water demand for the Corridor Plan, based on information regarding the existing and proposed land uses as provided by the City of San Mateo. Current and future land uses were combined with water use factors from various sources including factors provided by the City of San Mateo and from Cal Water's recently revised Urban Water Management Plan.

The estimated historical total annual water demand for the current land uses within the Corridor Plan Area is 278.4 AFY. The annual demand used by the Bay Meadows Racetrack is 176.5 AFY (obtained from metered sales records of Cal Water at the Racetrack). The remaining 101.9 AFY used within the Corridor Plan Area is an estimate of demand based on various water use factors and land uses and are exclusive of the Bay Meadows Racetrack water use.

The anticipated future water use within the Corridor Plan Area is 488.15 AFY under Scenario A. Under Scenario Z, the anticipated future water use increases to 930 AFY. Thus, compared to current water use, the net change in water use for the Corridor Plan is 210 AFY (488.15 AFY - 278.4 AFY) for Scenario A and 652 AFY (930 AFY - 278.4 AFY) for Scenario Z. The Corridor Plan would increase Cal Water's existing average day demand value of 18,650 AFY (16.65 million gallons per day (mgpd)) for the Mid-Peninsula system to between 18,860 AFY (16.84 mgpd) (Scenario A) and 19,302 AFY (17.23 mgpd) (Scenario Z).

2 The Water Supply Assessment is presented in Appendix E.

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The Corridor Plan would increase Cal Water's annual purchases from the SFPUC by at most 652 AF (0.582 mgpd), or four percent. Contractually the water is available for the anticipated increase in demand for the Corridor Plan if the demand for each category of customer (the demand per service) can be reduced to the historical average demand level for each of Cal Water's San Francisco Peninsula Districts. Projected demand for 2023 at average demand per service levels is 38,931 AFY (see Attachment 7 to the Water Supply Assessment in Appendix E). Consequently, about 711 AFY (39,642 AFY[SFPUC SAA] – 38,931 AFY[2023 projected average demand] = 711 AFY) would be available for the project. Under Scenario A, which would result in a net increase in demand of 210 AFY, there would be a surplus supply of 501 AFY (711 AFY – 210 AFY = 501 AFY) in 2023. Under Scenario Z, which would result in a net increase in demand of 652 AFY, there would be a surplus supply of 59 AFY (711 AFY – 652 AFY = 59 AFY) in 2023.

However, in the past few years demand has escalated above the average demand per service value, and Cal Water has consumed more than its SAA. If this condition continues, insufficient SFPUC water would be available within Cal Water’s SAA for these projects.

During single dry years, projected demand in 2023 would not be met by the supply available from Cal Water under existing contracts. With Cal Water's anticipated allocation reduced by 10% during a single dry year, Cal Water is anticipated to be approximately 3,253 AFY short on meeting its anticipated demands ((39,642 [SFPUC SAA] x 90%) – 38,931 AFY[2023 projected average demand] = 3,253 AFY). The Corridor Plan would incrementally contribute to this shortage, increasing it by 210 AFY under Scenario A and 652 AFY under Scenario Z. The total demand would be 39,141 AFY under Scenario A and 39,583 AFY under Scenario Z. Cal Water's total deficit (including the Corridor Plan) in a single dry year is anticipated to be 3,463 AFY (35,678 AFY – 39,141 AFY) under Scenario A, and 3,905 AFY (35,678 AFY – 39,583 AFY) under Scenario Z.

Similarly, during multiple-dry years, projected demand in 2023 would not be met by the supply available from Cal Water under existing contracts. With Cal Water's anticipated allocation reduced by 20% during a multiple-dry year, Cal Water is anticipated to be approximately 7,217 AFY short on meeting its anticipated demands ((39,642 [SFPUC SAA] x 80%) – 38,931 AFY [2023 projected average demand] = 7,217 AFY). The Corridor Plan would incrementally contribute to this shortage, increasing it by 210 AFY under Scenario A and 652 AFY under Scenario Z. The total demand would be 39,141 AFY under Scenario A and 39,583 under Scenario Z. Therefore, Cal Water's total deficit (including the Corridor Plan) in 2023 in multiple-dry years is anticipated to be 7,427 AFY (31,714 – 39,141) under Scenario A, and 7,869 AFY (31,714 – 39,583) under Scenario Z.

The effects of the Corridor Plan would be significant during single dry years, or multiple-dry years, unless Cal Water can obtain additional water to serve existing and planned demand, or reduce demand through implementation of demand management practices. Cal Water’s supply is subject to cutbacks during dry years. Those dry-year cutbacks could result in shortages to current residential, commercial and industrial users. During water shortages, the increment of water provided for the Corridor Plan would be considered to be a

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-13 EDAW, Inc. SECTION 4.8: UTILITIES significant adverse effect of the project, both individually and through its contribution to cumulative water demands.

It should be noted that while the incremental increase in demand associated with the Corridor Plan, together with cumulative water demand, would exceed Cal Water’s SAA in single dry and multiple-dry years, additional water in excess of the SAA could be purchased from the SFPUC at a substantially higher cost (an estimated $800 per acre-foot, compared to the current rate of $479 per acre-foot) (Cal Water, 2004).

Mitigation would be needed to increase water supplies so the supply would be reliable and sufficient for the Corridor Plan without affecting other uses. Demand side management and development of a local water supply are two potential solutions to this situation. These two methods are addressed separately under Mitigation Measures Utilities-CP1a and CP1b.

Mitigation Measure Utilities-CP1a: Cal Water and the City shall implement demand side management practices to reduce water demand.

Demand side management can help control the demand of customers to the average demand per service level. The Urban Water Conservation Council, of which Cal Water is a member, has adopted 14 best management practices (BMPs) to help conserve water, such as plumbing retrofits and education programs. Implementation of water conservation measures requires approval of the California Public Utilities Commission (CPUC), and approval will only be granted for those BMPs for which it is shown that the benefit outweighs the cost (Cal Water, 2004).

Cal Water’s consultant analyzed the BMPs to determine their benefit/cost ratio as applied to Cal Water, and determined that seven of the 14 BMPs would be effective at reducing water demand in the Mid-Peninsula District. The CPUC has approved the implementation of these programs. As a result, should there be a need to reduce demand, these programs would be implemented in the Mid-Peninsula District.

The SFPUC has estimated that implementation of long-term conservation efforts can reduce water demand by approximately 20 percent (SFPUC, 1996). Based on the SFPUC estimate, it is reasonable to assume that implementation of the BMPs could similarly reduce water demand in the Mid-Peninsula District by 20 percent from the second year following implementation. During the first year, while the BMPs are still being implemented, a 10 percent reduction could reasonably be anticipated.

With this reduced demand, projected demand in 2023 would be met by the anticipated supply. In a single dry year, and assuming a 10 percent reduction in demand due to the BMPs, the total Mid-Peninsula District demand would be 35,227 AFY (39,141 AFY x 90%) under Scenario A, and 35,625 AFY (39,583 AFY x 90%) under Scenario Z. In multiple-dry years, and assuming a 20 percent reduction in demand due to the BMPs, the total Mid-Peninsula District demand would be 31,313 AFY (39,141 AFY x 80%) under Scenario A, and 31,666 AFY (39,583 AFY x 80%) under Scenario Z. This would result in a surplus in a single dry year of 451

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-14 EDAW, Inc. SECTION 4.8: UTILITIES

AFY (35,678 AFY – 35,227 AFY) under Scenario A, and 53 AFY (35,678 AFY – 35,625 AFY) under Scenario Z. The surplus in multiple-dry years would be 401 AFY (31,714 AFY – 31,313 AFY) under Scenario A, and 48 AFY (31,714 AFY – 31,666 AFY) under Scenario Z.

For the infrequent drought years, it is common for water agencies to impose restrictions on water use. Normally, the reductions are in the order of 10 to 20 percent, as occurred in the early 1990s throughout much of California. Mandatory conservation is viewed as generally acceptable during the infrequent drought situation, rather than spending substantial funds to address an unusual event.

Overall, this is a less costly option available to Cal Water to cope with the possible reduction in water supplies during a significant water shortage. While not viewed as an alternative to provide water for future growth, mandatory conservation would be used in extreme situations to ensure that water supplies are adequate to fulfill water needs. Its availability and proven effectiveness is an additional "back-up" to ensure that water needs are met even in the driest of conditions.

In the prior drought of the late 1980s and early 1990s, the Mid-Peninsula District demonstrated its ability to conserve water at a high rate. From 1987 to 1991, the Mid-Peninsula District reduced its water purchases from 19,998 AFY to 14,376 AFY, which represents a 28 percent reduction in water use. During the same period, Cal Water's combined purchases from SFPUC were reduced by 29 percent. (See Attachment 7 of the Water Supply Assessment in Appendix E.) This proven ability to substantially reduce demand during periods of extreme water shortage indicates that the Mid-Peninsula District would have adequate water to meet its demands during such periods. Therefore, with implementation of demand side management measures during single and multiple dry years, the water supply for the Mid-Peninsula District is anticipated to be adequate and the impact would be reduced to a less than significant level.

Mitigation Measure Utilities-CP1b: Cal Water shall continue to pursue development of a local water supply as identified in the Water Supply Assessment and the UWMP.

Cal Water is investigating the development of local groundwater resources to supplemental supply. A local supply would reduce Cal Water's reliance on SFPUC supplies and help provide supply for the Corridor Plan and other redevelopment projects. Moreover, developing a local supply would cost much less than paying to develop additional imported supplies.

As detailed in the Mid-Peninsula UWMP, Cal Water is investigating the development of local groundwater resources to supplement supply. Cal Water intends to develop sufficient local sources to generate an amount of water equal to 10 percent of the total system demand, which would amount to approximately 1,900 AFY. To this purpose Cal Water has budgeted the drilling of a test well in the Mid-Peninsula system service area. The assessment of the planned test well will take nearly one year to conclude. If a sufficient groundwater supply is detected, then it would take another year to drill, develop and equip the well, with an additional year

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-15 EDAW, Inc. SECTION 4.8: UTILITIES required for constructing any necessary water treatment facilities. In total, an additional water supply could be provided within two to three years.

The test well would extract water from the San Mateo Sub-basin of the Santa Clara Groundwater Basin. This basin has not been adjudicated by a court or other body, and has not been identified by the California Department of Water Resources as being overdrafted.

A typical municipal supply groundwater well can produce approximately 1,600 AFY if operated 24 hours per day. This is about 2.5 times the amount of water needed to supply the maximum additional demand that would be placed on Cal Water from the Corridor Plan. The actual capacity of any well will depend on the hydrologic nature of the aquifers from which the well pumps, and cannot be determined until testing has been completed.

To accomplish this local water supply, Cal Water will need assistance from the Cities of San Carlos and San Mateo, and the property developers in obtaining property and permits, as well as regulatory approvals from the California Public Utility Commission. The permits that would be required to drill a new well include a system amendment permit from California Department of Health Services, a well construction permit from the County, a conditional use permit and a construction/building permit from the relevant city, an air quality permit from the local air quality management district (if an emergency generator is used), and well installation records from the California Department of Water Resources (Cal Water, 2004). All discretionary permits would also be accompanied by appropriate environmental review under the California Environmental Quality Act. With implementation of this mitigation measure, the impact would be reduced to a less than significant level.

Significance After Mitigation: Less than significant. ______

Wastewater Impact Utilities-CP2: Implementation of the proposed Corridor Plan (Scenarios A and Z) would increase residential and commercial land uses in the project area, resulting in increased wastewater generation. This would be a significant impact.

The City uses the following wastewater generation rates for land uses within the City: 210 gpd for single- family residential uses; 180 gpd for multi-family residential uses; and 0.1 gpd per square foot for non- residential uses (Montgomery Watson Harza, 2001). The flow capacity of the Southern Trunk System and SMWTP is currently adequate during times of dry weather. Based on the wastewater generation rates stated

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-16 EDAW, Inc. SECTION 4.8: UTILITIES above, buildout of the Corridor Plan would result in an increase in wastewater of approximately 1.01 million gpd, an increase of more than 8.4 percent.3 This would result in a total of 13.11 million gpd of wastewater requiring treatment in the City. The Southern Trunk System and SMWTP would have adequate capacity during times of dry weather to convey and treat the increased wastewater generated by the Corridor Plan.

During times of wet weather, the Southern Trunk System currently experiences deficiencies in capacity due to the high amount of RDI/I rainfall added to the system. The addition of wastewater associated with development under the Corridor Plan (Scenarios A and Z) would add to this deficiency. The City has preliminarily identified remedies to improve system capacity in the Southern Trunk System. These improvements include parallel relief sewers for the 39-inch Dale-Delaware trunk and relief for either the El Camino or Delaware-Bay Meadows trunks extending from 21st Avenue at El Camino Real or Concar Drive at Delaware Street, respectively, to Hillsdale Boulevard. Also included in these improvements is an additional pipeline undercrossing of Highway 101.

Mitigation Measure Utilities-CP2: The City shall collect a development impact fee from all applicants of proposed development projects within the Corridor Plan Area prior to issuance of a building permit to defray the cost to construct improvements and upgrades to the wastewater conveyance system.

Improvements would increase the capacity of the system allowing adequate conveyance of wastewater flows to the SMWTP. As described in the City’s Comprehensive Fee Schedule, the Wastewater Treatment Plant Expansion Impact Fee and a Sewer Connection Charge is imposed on all development that will contribute sewage to the SMWTP. In addition, the City imposes a Development Impact Fee on all development that adds sewage flow to the City’s sewer collection system west of Highway 101. These fees are collected to pay for a SMWTP upgrade completed in 1996, maintenance of current system improvements, and to fund a new sewer undercrossing of Highway 101. Individual projects within the Corridor Plan Area would be assessed these fees to cover the costs of improvements.

Assuming full buildout under Corridor Plan Scenario Z, fees collected from Corridor Plan development would consist of $5.8 million for improvements to the SMWTP, $7.6 million collected from the Sewer Collection Charge, and $2.1 million to fund the undercrossing, for a total of approximately $15.5 million. Fees collected under Corridor Plan A would consist of $2.8 million for improvements to the SMWTP, $3 million collected from the Sewer Collection Charge, and $835,000 to fund the undercrossing, for a total of approximately $6.1 million. At this time, the City does not have an estimate of the cost for improvements to the Southern Trunk System. As projects are proposed, the City may require, where deemed appropriate, that the project developer conduct a sewer and stormwater capacity analysis for their project. Fees may be used to fund improvements reducing RDI/I or for creating a wastewater detention basin. The City updates its Fee

3 This calculation assumes the maximum level of net new development under the Corridor Plan (Scenario Z) as a worst-case scenario. Additional wastewater demand was therefore calculated as follows: (4,031 units x 180 gpd) + (2.87 million x .1 gpd) = 1,012,580 gpd.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-17 EDAW, Inc. SECTION 4.8: UTILITIES

Schedule annually and these fee amounts are subject to change and will be determined at the time building permits are issued. As payment of the fee by an individual project sponsor would represent a fair-share contribution to the expense to the City for the necessary capital improvements, this impact would be mitigated to a less than significant level. This same conclusion would similarly apply to development under Corridor Plan A.

Significance After Mitigation: Less than significant. ______

Solid Waste Impact Utilities-CP3: Implementation of the proposed Corridor Plan (Scenarios A and Z) would increase residential and commercial land uses in the project area, resulting in an increase in solid waste generation. This would be a less than significant impact.

Solid waste generated by land uses within the Corridor Plan Area would be conveyed to the Ox Mountain Landfill with the rest of the City’s waste. The Ox Mountain Landfill currently has an estimated remaining capacity to accept solid waste until the year 2028. Given the estimated remaining capacity in the Ox Mountain Landfill, as well as the City’s approved diversion rate of 29 to 40 percent (1995 to 1999) and its actual diversion rate of 39 percent in 2001, development associated with the Corridor Plan would not result in a significant impact. If the City’s diversion rate (the percentage of waste that gets diverted from landfills to recycling) increases to comply with the 50 percent rate established by State requirements under AB 939, the amount of additional solid waste generated by development associated with the Corridor Plan would represent an even smaller percentage of the projected landfill capacity.

Mitigation Measure Utilities-CP3: None required. ______

Bay Meadows Impacts and Mitigation Measures

Water Supply Impact Utilities-BM1: Implementation of the proposed Bay Meadows project would increase residential and commercial land uses in the project area, resulting in an increase in demand for water. This would be a less than significant impact.

The proposed project includes the development of a maximum of 1,500 new housing units, which would potentially result in an increase to the City’s population of 3,720 people by 2020. In addition, the project

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-18 EDAW, Inc. SECTION 4.8: UTILITIES includes the development of 2.1 million gsf of office space, 100,000 gsf of retail space and approximately 15 acres of park. The increase in residential units and commercial space would generate increased numbers of people within the City boundaries and would increase demand for water supply.

Cal Water prepared a Water Supply Assessment for the Bay Meadows project on December 18, 2003 (see Appendix E). Metered sales records for the Bay Meadows project site show that historic water demand on the site totals 176.5 AFY. Using standardized and approved water use factors, Cal Water calculated the water demand for the Bay Meadows project. Based on these factors, estimated water demand for the Bay Meadows project would total 351.3 AFY, which represents a net increase of approximately 175 AFY compared to current water use. By itself, the Bay Meadows project would increase existing demand for the Mid-Peninsula District to 18,825 AFY (18,650 AFY[existing average demand] + 175 AFY[net increase in demand associated with Bay Meadows project]). Current water demand at Bay Meadows is accounted for in Cal Water’s Urban Water Management Plan.

The Bay Meadows project would increase Cal Water's annual purchases from the SFPUC by 175 AFY, or one percent. Contractually the water is available for the anticipated increase in demand for the Bay Meadows project, if the demand for each category of customer (the demand per service) can be reduced to the historical average demand level for each of Cal Water's San Francisco Peninsula Districts. Projected demand for 2023 at average demand per service levels is 38,931 AFY (see Attachment 7 of the Water Supply Assessment in Appendix E). Consequently, about 711 AFY (39,642 AFY[SFPUC SAA] – 38,931 AFY [2023 projected average demand] = 711 AFY) would be available for the proposed project provided that the demand per service does not increase above the average. Under the Bay Meadows project, which would result in a net increase in demand of 175 AFY, there would be a surplus supply of 536 AFY (711 AFY – 175 AFY = 536 AFY) in 2023.

However, in the recent past few years, demand has escalated above the average demand per service value, and Cal Water has consumed more than its SAA. If this condition continues, insufficient SFPUC water would be available within Cal Water’s SAA for these projects.

During single dry years, projected demand in 2023 would not be met by the anticipated supply available from Cal Water. With Cal Water's anticipated allocation reduced by 10% during a single dry year, Cal Water is anticipated to be approximately 3,253 AFY short on meeting its anticipated demands ((39,642 AFY [SFPUC SAA] x 90%) – 38,931 AFY[2023 projected average demand] = 3,253 AFY). The Bay Meadows project would incrementally contribute to this shortage by 175 AFY. The total demand, with the Bay Meadows project, would be 39,106 AFY (38,931 AFY + 175 AFY). Cal Water's total deficit in a single dry year is anticipated to be 3,428 AFY (35,678 AFY – 39,106 AFY).

Similarly, during multiple-dry years, projected demand in 2023 would not be met by the anticipated supply available from Cal Water. With Cal Water's allocation reduced by 20% during a multiple-dry year, Cal Water is anticipated to be approximately 7,217 AFY short on meeting its anticipated demands ((39,642 AFY

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-19 EDAW, Inc. SECTION 4.8: UTILITIES

[SFPUC SAA] x 80%) – 38,931 AFY [2023 projected average demand] = 7,217 AFY). The Bay Meadows project would incrementally contribute to this shortage by 175 AFY. The total demand in 2023, including the Bay Meadows project, would be 39,106 AFY (38,931 AFY + 175 AFY). Cal Water's total anticipated deficit in 2023 in multiple-dry years is anticipated to be 7,392 AFY (31,714 AFY – 39,106 AFY).

The effects of the Bay Meadows project could be significant during single dry years, or multiple-dry years, unless Cal Water can obtain additional water to serve existing and planned demand, or reduce demand through implementation of demand management practices. Cal Water’s supply is subject to cutbacks during dry years. Those dry-year cutbacks could result in shortages to current residential, commercial and industrial users. During water shortages, the increment of water provided for the Bay Meadows project would be considered to be a significant adverse effect of the project, both individually and through its contribution to cumulative water demands.

It should be noted that while the incremental increase in demand associated with the Bay Meadows project, together with cumulative water demand, would exceed Cal Water’s SAA in single dry and multiple-dry years, additional water in excess of the SAA could be purchased from the SFPUC at a substantially higher cost (an estimated $800 per acre-foot, compared to the current rate of $479 per acre-foot) (Cal Water, 2004).

Mitigation measures would be needed to increase water supplies so the supply would be reliable and sufficient for the Corridor Plan without affecting other uses. Demand side management and development of a local water supply are two potential solutions to this situation. These two methods are addressed separately under Mitigation Measures Utilities-BM1a and BM1b.

Mitigation Measure Utilities-BM1a: Cal Water and the City shall implement demand side management practices to reduce water demand.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-20 EDAW, Inc. SECTION 4.8: UTILITIES implementation of the BMPs could similarly reduce water demand in the Mid-Peninsula District by 20 percent from the second year following implementation. During the first year, while the BMPs are still being implemented, a 10 percent reduction could reasonably be anticipated.

With this reduced demand, projected demand in 2023 would be met by the anticipated supply. In a single dry year, and assuming a 10 percent reduction in demand due to the BMPs, the total Mid-Peninsula District demand would be 35,195 AFY (39,106 AFY x 90%). In multiple-dry years, and assuming a 20 percent reduction in demand due to the BMPs, the total Mid-Peninsula District demand would be 31,285 AFY (39,106 AFY x 80%). This leads to a surplus in a single dry year of 483 AFY (35,678 AFY – 35,195 AFY). The surplus in multiple-dry years would be 429 AFY (31,714 AFY – 31,285 AFY).

Mitigation Measure Utilities-BM1b: Cal Water shall continue to pursue development of a local water supply as identified in the Water Supply Assessment and the UWMP.

Cal Water is investigating the development of local groundwater resources to supplemental supply. A local supply would reduce Cal Water's reliance on SFPUC supplies and help provide supply for the Bay Meadows project and other redevelopment projects. Moreover, developing a local supply would cost much less than paying to develop additional imported supplies.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-21 EDAW, Inc. SECTION 4.8: UTILITIES

A typical municipal supply groundwater well can produce approximately 1,600 AFY if operated 24 hours per day. This is about nine times the amount of water needed to supply the additional demand that would be placed on Cal Water from the Bay Meadows project. The actual capacity of any well will depend on the hydrologic nature of the aquifers from which the well pumps, and cannot be determined until testing has been completed.

To accomplish this local water supply, Cal Water will need assistance from the Cities of San Carlos and San Mateo, and the project sponsor in obtaining property and permits, as well as regulatory approvals from the California Public Utility Commission. The permits that would be required to drill a new well include a system amendment permit from California Department of Health Services, a well construction permit from the County, a conditional use permit and a construction/building permit from the relevant city, an air quality permit from the local air quality management district (if an emergency generator is used), and well installation records from the California Department of Water Resources (Cal Water, 2004). All discretionary permits would also be accompanied by appropriate environmental review under the California Environmental Quality Act. With implementation of this mitigation measure, the impact would be reduced to a less than significant level.

Significance After Mitigation: Less than significant. ______

Wastewater Impact Utilities-BM2: Implementation of the proposed Bay Meadows Plan would increase residential and commercial land uses in the project area, resulting in increased wastewater generation. This would be a significant impact.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-22 EDAW, Inc. SECTION 4.8: UTILITIES includes the development of 2.1 million gsf of office space and 100,000 gsf of retail space. The increase in residential units and commercial space would increase the generation of wastewater requiring treatment.

The Bay Meadows project would be expected to result in an average daily wastewater discharge of 320,200 gpd. This figure was calculated with the following water-use rate assumptions: 170.8 gpd per residential unit (assuming 2.48 people per unit); 15 gallons per capita per day for other uses (assuming 275 sf/person for office space, 250 sf/person for retail space); and 85 percent of water used enters the sewers. These assumptions take into consideration that the project would utilize water efficient fixtures and low water use technologies to minimize water demand. Because 209,800 gpd are currently used on the project site, the net increase in sanitary flows would be approximately 110,400 gpd.4

The Bay Meadows project is not anticipated to contain any land uses likely to increase the concentration of pollutants within the wastewater flows at the SMWTP. Upgrades to the treatment plant at the SMWTP are therefore not anticipated to be required. However, during times of wet weather, the Southern Trunk System currently experiences deficiencies in capacity due to the high amount of RDI/I rainfall added to the system. The addition of project-related wastewater would add to this deficiency. This would be a significant impact. The City has preliminarily identified strategies to improve system capacity in the Southern Trunk and Norfolk Street systems. These improvements include either a connection to the Delaware Street/16th Avenue trunk system or the Norfolk Street system. Connection of the Bay Meadows project site to the Norfolk Street system would require an additional pipeline undercrossing of Highway 101. This connection would likely require a pumping station and a force main routed via a combination of the following measures:

Mitigation Measure Utilities-BM2a: The project sponsor shall pay development impact fees to defray the cost to construct improvements and upgrades to the wastewater conveyance system. The fees shall be calculated per the Development Impact Fee for Wastewater Treatment Plant Expansion, Sanitary Sewer Undercrossing for Highway 101, and the Sewer Connection Charge at the rate described in the City’s most recent Development Fee Calculator.

As described in the City’s Development Fee Calculator, the Wastewater Treatment Plant Expansion Impact Fee and Sewer Connection Charge are imposed on all development that will contribute sewage to the SMWTP. In addition, the City imposes a fee on all development that adds sewage flow to the City’s sewer collection system west of Highway 101. These fees are collected to pay for a SMWTP upgrade completed in 1996, current system improvements, and to fund a new sewer undercrossing of Highway 101. Development within the Bay Meadows Plan area would be assessed these fees to cover the costs of improvements. Improvements to the Norfolk Street system are partially funded. These funds would also be used to complete the necessary upgrades to the Norfolk Street system.

4 The calculations are as follows: 1) Average daily wastewater discharge: 320,200 gpd = {(1,500 units *170.8 gpd)+(2.1Msf / 275 sf/person * 15 gpd) + (100,000 sf / 250 sf/person * 15 gpd)}*0.85. 2) Net increase in sanitary flows: 320,200 gpd – 209,800 gpd = 110,400 gpd.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-23 EDAW, Inc. SECTION 4.8: UTILITIES

Preliminary estimates of the necessary improvements and upgrades to the Delaware Street /16th Avenue or Norfolk connection total $13 million. It is unclear at this time what proportion of this improvement cost would be attributed to the Bay Meadows project as the ultimate cost would be based on a percentage of the total acreage of development and flows added to the tributary system. These improvements would increase the capacity of the system allowing adequate conveyance of wastewater flows to the SMWTP. Fees collected from the Bay Meadow project for the various upgrades would consist of a total of approximately $2.4 million for the Wastewater Treatment Plant Expansion, $0.9 million for the Sanitary Sewer Undercrossing of Highway 101, and $3.1 million for the Sewer Connection Charge, for a total of $6.4 million towards these improvements.5

The developer may choose to construct the improvements. Either construction of the improvements described below or payment of the fees to construct the improvements would mitigate this impact. It may be feasible for the developer to fund improvements based on an agreement that the City reimburse the developer over time. However, with a project of this magnitude that may not be economically feasible.

Mitigation Measure Utilities-BM2b: The project sponsor shall fund the construction or shall construct improvements to the Delaware Street/16th Avenue or Norfolk connection.

Improvements to the Norfolk connection may be constructed under the following options:

Bay Meadows to Bermuda Avenue Reach

• Option 1a ─From the Bay Meadows project site north along Saratoga Drive to the 19th Avenue Channel, then east along the channel edge to Bermuda Avenue. This section would be located within City-owned streets and the City-owned access path adjacent to the 19th Avenue Channel. • Option 1b ─From the Bay Meadows project site north-east along Bermuda Avenue to the 19th Avenue Channel. The construction of this pipe would cause short-term disruption to the residents of Bermuda Avenue. This section would be located within City-owned streets.

Bermuda Avenue to Norfolk Reach

• Option 2a ─From Bermuda Avenue north-east across the City Park to Highway 101, under Highway 101 and onto Norfolk Street in the Caltrans right-of-way. This section would be located within the City-owned park and within the Caltrans right-of-way (from the Highway 101 under-crossing to the point of connection in Norfolk Street), thus requiring an easement to be granted to the City. • Option 2b ─From Bermuda Avenue east along the 19th Avenue Channel edge to Norfolk Street. A dense arrangement of utilities exists immediately to the east of the highway and alongside the

5 The Wastewater Treatment Plant Expansion Fee is calculated based on $666 per 1-bedroom unit, $999 per 2-bedroom unit, $1,332 per 3-bedroom unit, and $0.333 per square foot of commercial space. The Undercrossing fee is calculated based on $248 per 1-bedroom unit, $372 per 2-bedroom unit, $496 per 3-bedroom unit, and $0.124 per square foot of commercial space. The Sewer Connection Charge is based on $982 per 1-bedroom unit, $1,474 per 2-bedroom unit, $1,964 per 3-bedroom unit, and $0.30 per square foot of commercial space.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-24 EDAW, Inc. SECTION 4.8: UTILITIES

southern edge of the channel, which may require some modifications to allow the routing of the Norfolk connection. This section would be located within the City-owned access path adjacent to the 19th Avenue Channel. At the Highway 101 under-crossing, the pipe would be located within the Caltrans right-of-way, thus requiring an easement to be granted to the City. At the dense utility node, it may be desirable to locate the pipe within the parking lot of an adjacent private property, which would also require an easement to be granted to the City.

The associated pump station would be located either on-site or at some point along the route of the force main and would not be located in residential neighborhoods. The recommended location would be in the landscaped area at the junction of Saratoga Drive and the 19th Avenue Channel. The pump station would likely consist of an underground chamber with an above ground control panel. The emergency access to the access path along the edge of the 19th Avenue Channel would have to be maintained. The pump station would be equipped with an emergency stand-by generator, which would only function during power outages and routine generator testing. During these infrequent events, the generator may create noise audible to the adjacent residential properties. However, this would be screened by a soundwall. Other possible locations for the pump station are within the Bay Meadows project park or within the access road adjacent to the 19th Avenue Channel.

The Delaware Street/16th Avenue trunk system is currently overcapacity with connected flows. The Norfolk Street system is currently overcapacity, but has been identified as a needed project by the City and has been partially funded in the five-year Capital Improvement Project list. It is anticipated that improvement to the Norfolk Street system will be completed in 2006-7.

The connection from Bay Meadows project to the Norfolk Street sewer allows the Los Prados and Southern Trunk watersheds to be connected. This would provide the City with operational flexibility to transfer flows from the Southern Trunk system to the Norfolk sewer.

It should be noted that implementation of this mitigation measure could have its own physical environmental effects, but because it has yet to be determined more specifically how these improvements would be constructed, their physical environmental effects cannot be determined at this time. At such time that a specific improvement identified here is approved, additional environmental review may be required.

Significance After Mitigation: Less than significant. ______

Solid Waste Impact Utilities-BM4: Implementation of the proposed Bay Meadows project would increase residential and commercial land uses on the project site, resulting in an increase in solid waste generation. This would be a less than significant impact.

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The proposed project includes the development of a maximum of 1,500 new housing units potentially resulting in an increase in population of 3,720 people by 2020. In addition, the project includes the development of 2.1 million gsf of office space and 100,000 gsf of retail space. The increase in residential units and commercial space would generate increased numbers of people within the City boundaries and would result in an increased generation of solid waste.

Solid waste generated by land uses associated with the Bay Meadows project would be conveyed to the Ox Mountain Landfill with the rest of the City’s waste. The Ox Mountain Landfill currently has an estimated remaining capacity to accept solid waste until the year 2028. Given the estimated remaining capacity in the Ox Mountain Landfill, as well as the City’s approved diversion rate of 29 to 40 percent (1995 to 1999) and its actual diversion rate of 39 percent in 2001, development associated with the Bay Meadows project would not result in a significant impact. If the City’s diversion rates increases to comply with the 50 percent rate established by State requirements under AB 939, the amount of additional solid waste generated by the project would represent an even smaller percentage of the projected landfill capacity.

Mitigation Measure Utilities-BM4: None required. ______

REFERENCES

Bay Meadows Land Company (BMLC). Bay Meadows Development Phase II: Concept Report—Infrastructure Project Summaries, Final Draft. Prepared by Ove Arup & Partners California LTD, November 6, 2002.

Bay Meadows Land Company, Bay Meadows Specific Plan Amendment: San Mateo, California, May 28, 2003.

California Integrated Waste Management Board (CIWMB), 2003. Available at: http://www.ciwmb.ca.gov/Profiles/Juris/JurProfile1.asp?RG=C&JURID=453&JUR=San+Mateo.

California Water Service Company (Cal Water), Urban Water Management Plan for the Mid-Peninsula District, August 2001.

California Water Service Company (Cal Water), 2003a, Water Supply Assessment for the Corridor Plan and Bay Meadows II Specific Plan, City of San Mateo, December 18, 2003.

California Water Service Company (Cal Water), 2003b. Available at: http://www.calwater.com.

California Water Service Company (Cal Water), 2004, Personal communications with S. Scott, City of San Mateo.

San Mateo Corridor Plan and Bay Meadows Specific Plan Amendment EIR 4.8-26 EDAW, Inc. SECTION 4.8: UTILITIES

Calthorpe and Associates, Bay Meadows Specific Plan, April 1997.

City of San Mateo. Vision 2010: San Mateo General Plan, 1997.

City of San Mateo, 2003a. Public Works Department website. Available at: http://www.ci.sanmateo.ca.us/dept/pubwks/index.html.

City of San Mateo, 2003b. Darla Reams, Deputy Director of Public Works, Personal communication with EDAW, June 12, 2003.

City of San Mateo, 2003c. Gary Heap, Senior Engineer, Public Works Department, Personal communication with EDAW, June 12, 2003.

City of San Mateo Public Works Department, Personal communication with EDAW, Inc., 2004.

Gasparini, Gino, Operations Manager, Browning Ferris Industries, Personal conversation with EDAW, Inc., 2003.

Montgomery Watson Harza, City of San Mateo: City-wide Sewer System Study, December 13, 2001.

Public Utilities Commission of the City and County of San Francisco, Urban Water Management Plan for the City and County of San Francisco, March 1996.

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