New developments would have to meet more stringent stormwater-retention standards than redeveloped sites under a forthcoming Environmental Protection Agency proposal, said Christopher Kloss, the agency's green-infrastructure and stormwater coordinator. The more relaxed standards for redeveloped sites reflect the EPA's desire to encourage businesses to invest in urban redevelopment projects, Kloss said. An "unequal playing field" results from having stormwater standards in municipal separate storm sewer systems "and not outside," he said.

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