Reso PC16-23 PC 0116 Reso CEQA - Sandpiper

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Section 4.0 — Environmental Setting and Discussion of Impacts The State Water Resources Control Board (SWRCB) has issued statewide waste discharge requirements for sanitary sewer systems that include requirements for development of an SSMP, The SSMP is also required by the San Francisco Bay Regional Water Quality Control Board (RWQCB), The City's SSMP includes the elements required by both the S WRCB and RWQCB and was last updated in December 2013. 4.17.1.2 Existing Conditions Water Service and Supply The project site is developed with the Sandpiper Community Center, Sandpiper Park, and Sandpiper Elementary School. The water system serving the project site is owned and operated by the City of Redwood City, A 10 -inch water main located within the Egret Lane right-of-way serves the project site. Existing water usage on the site is approximately 17,640 gallons per day (gpd). Wastewater/Sanitary Sewer System Sanitary sewer service is provided to the project site by the Redwood City sanitary sewer collection system. 37 Wastewater from the proj ect area is treated at the Silicon Valley Clean Water wastewater treatment plant located in Redwood Shores. Assuming 80 percent of water used by the school ends up as wastewater, the existing school generates approximately 14,112 gpd of wastewater. A six-inch sanitary sewer main located within the Redwood Shores Parkway right-of-way and an eight -inch sewer main within Egret Lane right-of-way serves the project site. Storm Drainage The project site is developed and consists of both pervious and impervious surfaces. Runoff from the project site currently flows into the City -maintained storm drainage system, which is comprised of a network of inlets, manholes, pipes, outfall, channels, and pump stations. An existing 30 -inch stonn drain main within the right-of-way of Egret lane and Redwood Shores Parkway serves a portion of the project site and a 24-vlch main along the rear of the property serves the other portion. Solid Waste The most recent San Mateo County Integrated Waste Management Plan (IWMP) was approved by CalRecycle in 2009. Each jurisdiction in the County has a landfill diversion requirement of 50 percent per year. Ox Mountain Sanitary Landfill is the only landfill in operation in San Mateo County, In 2008, the landfill had 3,598 tons per day of incoming solid waste and had a remaining capacity to operate through 2029.38 Solid waste disposal for the project site is provided by Recology of San Mateo County.39 37 West Yost Associates. City of Redwood CiSewery Seer Master Plan Update. January 2013. " San Mateo County. San Mateo County Integrated Waste Management Plan. December 2009. "City of Redwood City. "Public Works— Solid Waste." Accessed June 22, 2016. Available at: htto://www.redwoodcitv.org/del)artments/public-works/solid-waste. City of Redwood City I00 Initial Study/Mitigated Negative Declaration Sandpiper Elementary School Facilities Expansion November 2016