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Step 2 - Calculate Water Quality Volume Is this project subject to Section 4.3 of the NYS Design Manual for Enhanced Phosphorus Removal? No What is the nature of this construction project? Redevelopment with increase in impervious area Design Point: 1 Enter 90% Rainfall Event as P P= 1.00 inches Calculate Required WQv Contributing Percent Drainage Area Impervious Area WQv SMP Area Impervious Rv Number (Acres) (cf) Description (Acres) % Filtration 1 0.63 0.22 34 0.36 817 Bioretention Flow Based 2 1.70 1.48 87 0.83 5,144 Alternative Practice Filtration 3 0.65 0.22 33 0.35 829 Bioretention Filtration 4 0.68 0.48 71 0.69 1,692 Bioretention Flow Based 5 0.43 0.43 100 0.95 1,483 Alternative Practice 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Total 4.09 2.82 69 0.67 9964 Required WQv Page 164 of 359