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TA. - Page 85 <br /> LSA ASSOCIATES, INC. ROCKETSHIP REDWOOD CITY ELEMENTARY SCHOOL PROJECT <br /> SEPTEMBER 2016 INITIAL STUDY/MITIGATED NEGATIVE DECLARATION <br /> Potentially <br /> Significant <br /> Potentially Unless Less Than <br /> Significant Mitigation Significant No <br /> Impact Incorporated Impact Impact <br /> IX. HYDROLOGY AND WATER QUALITY. <br /> Would the project: <br /> i) Expose people or structures to a significant risk of ❑ ❑ ® ❑ <br /> loss,injury or death involving flooding,including <br /> flooding of as a result of the failure of a levee or <br /> dam? <br /> j) Inundation by seiche,tsunami,or mudflow? ❑ ❑ ® ❑ <br /> This analysis considers potential environmental impacts that could result from implementation of the <br /> proposed project,including impacts related to construction and operation of a sub-slab <br /> depressurization system(SSDS)designed to address the potential presence of VOCs inside the project <br /> site structure;no hydrology and water quality impacts related to construction or operation of the SDSS <br /> were identified. <br /> a) Violate any water quality standards or waste discharge requirements?(Less-Than-Significant <br /> Impact) <br /> The State Water Resources Control Board and nine Regional Water Quality Control Boards regulate <br /> the water quality of surface water and groundwater bodies throughout California. Runoff water <br /> quality is regulated through the National Pollutant Discharge Elimination System(NPDES)Program <br /> (established through the federal Clean Water Act). The NPDES Program objective is to control and <br /> reduce pollutant discharges to surface water bodies. Compliance with NPDES permits is mandated by <br /> State and federal statutes and regulations. Locally,the NPDES Program is overseen by the San <br /> Francisco Bay Regional Water Quality Control Board(Water Board). The San Mateo Countywide <br /> Water Pollution Prevention Program(SMCWPPP)assists cities,towns,and unincorporated areas <br /> with coordination and consistency of approaches across the County in implementing the Water Board <br /> requirements. <br /> The project site and surrounding areas are flat or gently sloped. The elevation of the project site <br /> ranges from approximately 8.1 feet above the National Geodetic Vertical Datum of 1929 (NGVD 29) <br /> in the northern corner to approximately 11.2 feet NGVD 29 in the southern corner."Runoff from the <br /> project site is conveyed to the City of Redwood City's Douglas Avenue Pump Station. The pump <br /> station conveys flow to the Bayfront Canal,which ultimately drains to the Bay. <br /> The project site has an area of approximately 48,800 square feet(1.12 acres),and is currently <br /> developed with an approximately 23,200-square-foot(0.53 acres)warehouse and an associated <br /> parking lot and storage shed that make up the remainder of the project site (approximately 25,600 <br /> square feet,0.59 acres). The proposed project would convert the interior of the existing building on <br /> 77 K2A Architecture+Interiors,2014,op.cit. <br /> P:1RWC1401B Rocketship Sch-I\PRODUCrSUS-MND1Public\Ra ketship Public Review 09-29-16.docx(09/29/16)PUBLIC REVIEW DRAFT 61 <br /> ATTY/RESO.0084/CC RESO ADOPTING CEQA-ROCKETSHIP CHARTER SCHOOL APPEAL <br /> REV:09-05-17 VR Page 69 of 124 <br />