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BIORETENTION SQDV CALCULATIONS <br /> Date: 3/30/2020 <br /> By: BSR <br /> . Architecture <br /> Engineering <br /> SQDV= Unit Basin Storage Volume x Total Element Area Environmental <br /> kfwLand Surveying <br /> Required Plant Area = (SQVD/ Pond Depth) Companies <br /> PDA-210 <br /> Bioretention Area 394,652 ft <br /> Ponding Depth 1 ft <br /> Site Element Runoff Coeff. Element Area (ft) Percent of Weighted Runoff <br /> Total Area Coeff. (Cr) <br /> Grass (Soil C/D) 0.05 143,645 36% 0.02 <br /> Paved 0.95 218,441 55% 0.53 <br /> Basin 0.95 32,566 8% 0.08 <br /> Tota 1 394,6521 0.62 <br /> Unit Basin Storage Volume (Fig <br /> 0.20 in <br /> 6-1, 2009 SWQCCP) <br /> 12-hr SQDV 6,578 ft <br /> Required Planting Area 6,578 ft <br /> Proposed Planting Area 32,566 ft <br /> Proposed - Required Area 25,988 ft <br /> Difference <br />