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What off-site mitigation and alternative possibilities are there?

April 26, 2017alternative mitigation Off-Site Possibilities

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What off-site mitigation and alternative possibilities are there?

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Alternative Compliance is described in the Permit (Page 66) when on-site LID BMPs to meet the 5% EIA are not feasible. Feasibility is determined by a professional report. Mitigation off-site is required for the portion of the design storm volume that cannot be infiltrated or reused on-site. For example if an EIA of 28% is the best that can be obtained on-site, the difference of 28% (actual EIA) and 5% (the EIA requirement) is 23% EIA. Then the design storm runoff volume from 23% of the total project area would need to be mitigated off-site (pg 67).