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f e i PA- 1700196 (SA , TE ) Project - 3 - 5 March 2020 San Joaquin County Phase I and II Municipal Separate Storm Sewer System ( MS4) Permits ' 4' The Phase I and II MS4 permits require the Permittees reduce pollutants and runoff 4 flows from new development and redevelopment using Best Management Practices ( BMPs) to the maximum extent practicable (MEP ) . MS4 Permittees have their own e development standards , also known as Low Impact Development ( LID)/post- construction standards that include a hydromod-ification component . The MS4 permits also require -specific design concepts for LID/post-construction BMPs in the early stages of a project during the entitlement and CEQA process and the development plan review process . ! For more information on which Phase - I MS4 Permit this project applies to , visit the Central Valley Water Board website at: http : //www waterboards ca qov/centralvallev/water issues/storm water/municipal p i erm its/ For more information on the Phase II MS4 permit and who it applies to , visit the State Water Resources Control Board at: hftp :,I/www . waterboards . ca . gov/water issues/programs/stormwater/phase ii munici pal . shtml Industrial Storm Water General Permit Storm water discharges associated with industrial sites must comply with the regulations contained in the Industrial Smarm Water General Permit -Order No . 2014- ] 0057-DWQ . For more information on the Industrial Storm Water General Permit , visit the Central Valley Water Board website at : hftp : //www . waterboards . ca . gov/centraIvaIley/water issues/storm water/industrialge neral permits/index . shtml Clean Water Act Section 404 Permit If the project will involve the discharge of dredged or fill material in navigable waters or wetlands , a permit pursuant to Section 404 of the Clean Water Act may be needed from the United States Army Corps of Engineers ( USACE) . If a Section 404 permit is-required by the- USACE , the Central Valley Water Board will review the permit application to ensure that discharge will not violate water quality standards . If the project requires surface water drainage realignment , the applicant is advised to contact the Department of Fish and Game for information on Streambed Alteration Permit requirements . If you have any questions regarding the Clean Water Act Section 404 permits , please contact the Regulatory Division of the Sacramento District of USACE at (916) 557-5250 . Clean Water Act Section 401 Permit — Water Quality- Certification If an USACE permit (e . g . , Non- Reportin-go Nationwide Permit , Nationwide Permit , Letter of- Permission , Individual Permit , Regional General Permit, Programmatic Municipal Permits = The Phase I Municipal Separate Storm Water System (MS4 ) Permit covers medium sized Municipalities (serving between 100 , 000 and 250 , 000 people) and large sized municipalities (serving over 250 , 000 people) . The Phase II MS4 provides coverage for small municipalities , including non -traditional Small MS4s , which include military bases , public campuses , prisons and hospitals . PA- 1700196 — Informational Letters 9