Fundamentally, the existing standard… a level of discharge deemed suitable by everyone to better the condition of the Chesapeake Bay..of 0.45 lb/ac/yr corresponds with a ~16% level of imperviousness. Therefore, if your imperviousness is above 16%, as a developer you are obliged to providing stormwater quality mitigation to reduce the phosphorous load from your site to mimic an imperviousness of 16%. As an example, this requires that a site with a 70% impervious surface ratio mitigate phosphorous discharge by 77% to mimic a 16% impervious surface ratio…that is certainly a very significant stormwater requirement.
Please say "NO" to these regulations as proposed.