This project is seeking to achieve credit 6.2 by infiltrating 100% of the first flush of stormwater, using a combination of pervious paving and infiltration trenches. According to the California Stormwater Best Management Practices Handbook - Industrial/Commercial (1983) and the California Regional Water Quality Control Board - Standard Urban Stormwater Mitigation Plans, 80-90% of the TSS and other pollutants are contained in this first flush. The reference standard for LEED" does not quantify the amount of stormwater that must be infiltrated to achieve the stated removal efficiencies of 50-100% for both TSS and TP. Is the above design of infiltrating 100% of the first flush an acceptable approach to earning this credit?
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