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Major Developments in MS4 Permitting: The Chesapeake Bay Watershed Experience

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Municipal Separate Storm Sewers Systems (MS4s) in the Chesapeake Bay watershed are on the frontline of next generation NPDES permit development. Significantly, these stringent new permits are progressing in advance of EPA's important national stormwater rulemaking. This paper summarizes major new permit issues and provisions within the Chesapeake Bay watershed and Mid-Atlantic region MS4 permits, especially costly new requirements for mandatory TMDL implementation (existing development) and for post-construction design standards (new development and redevelopment), which represent significant national precedents. This paper addresses these evolving MS4 permitting practices as illustrated by the activities of multiple regulatory agencies across the Mid-Atlantic region.

Document Type: Research Article


Publication date: January 1, 2012

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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