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2 Esavi��nnaental Analy.ris <br /> collected and analyzed groundwater samples at the site£or the proposed project,ar�d the results were <br /> well below the Soluble Thxeshold Limit Concentration (STLC) for contaminarit concentrarions <br /> classified as hazardous (see Envirorunental Site Assessment in Appendix G). <br /> Rege�latory Setting. The CWA establishes the legal foundation for regulating surface water quality <br /> throtighout the narion. 1"he Porter-Cologne Water Quality Act predates the CWA and requires <br /> repoxting discharge of waste to land or surface waters. <br /> Sections 303 and 304 of CWA provide water quality standards and guidelines fat all su�face waters of <br /> the United States. "Waters oF the US"is a term that indudes navigable water bodies, tributaries of <br /> navigable waters, and adjacent wetlands. Secrion 401. requires that discharges to waters of the US <br /> obtain certification from the state that the discharge complies with applicable requirements for <br /> protecring water quality in the area. Secrion 402 of the CWA establishes the National Pollurion <br /> Discharge Eliinination System {NPDES},a permitt�ng system for any discharges into waters of the <br /> LTS, enforced by the S�'RCB and RWQCBs. 5ection 404 of the C�'A gives tl�e USACE jurisdiction <br /> over regulating the discharges of dredge or fiil material in waters of the U.S. <br /> The SFRWQCB Basin Plan identifies Redwood Creek as having wfldlife habitat,wartn-fxeshwater <br /> habitat,and recreational water opportuniries {WRECO,2013). <br /> The Cit�is a membe�of the San Mateo Connty�X'ater Poll.ution Prevention Program (SMCWPPP}, <br /> which s�iares a common NPDES permit. The project atea would be within San Mateo County and <br /> Redwood City NPDES Permit No. CA-S612008 (�XjRECO,2013). Ptovision C.3 (Stormwater <br /> Technical Guidance} of the MRP requites pxojects to evaluate anc�implement permanent post- <br /> constructian stormwater treatment and hydxomodification mitigation. The MRP outlines the state's <br /> requirements for municipal agencies in San Mateo County to address water qualiry and stormwater <br /> runoff issues {WRECO,2013). <br /> Under NPDES regularions,a project t1�at would disturb more than one acre of land would be <br /> subjected to the NPDES General Permit for Stormwate�Discharges Associated with Constxuction <br /> Acrivity (Qrder No. 2009-OQ09-DW�. PYOjects that create less than 10,000 square feet of <br /> impervious surface need to implement erosion control measures to the ma�mum extent practical <br /> under the pxovisians of the City's NPDES permit. <br /> The Federal Emergency Manage�ent Act (FEMA) is the nationwide administrator of the Nariona� <br /> Flood Insurance Program (NFIP) and enforces flood hazaxd assessment and mitigation for potenrial <br /> flood disasters. <br /> Executive Order 11988 of Title 23 Code of Fedexal Regulations,Part 650,Subpart A {23 CFR 650A, <br /> directs fedexal agencies to avoid short-term and lang-term iunpacts associated with modificarions to <br /> floodplains and discourages incompatible development within floodplains. <br /> �? �E:'. US 909 Pedestriaza Undercro.r,rgng and BAar <br /> Island Aoad Storna Draits Pum�i Statiora Project <br />