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EPA document number EPA 841-B-09-001, December 2009, was developed by the US EPA Office of Water. This stormwater guidance document implements Section 438 of the Energy Independence and Security Act (EISA) of 2007 and EO 13514 Section 14. The document was developed in conjunction with other federal agencies and provides a step-by-step framework that will help federal agencies maintain pre-development site hydrology by retaining rainfall on-site through infiltration, evaporation/transpiration, and re-use to the same extent as occurred prior to development. The Technical Guidance provides background information, key definitions, case studies, and guidance on meeting the new requirements.

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Last Updated: July 31, 2017