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Western Washington Hydrology Model <br /> PROJECT REPORT <br /> Project Name: Water Quality calcs <br /> Site Address: 2312 West Casino Road <br /> City Everett <br /> Report Date : 5/07/2009 <br /> Gage Everett <br /> Data Start 1948/10/01 <br /> Data End 1997/09/30 <br /> Precip Scale: 1.00 <br /> DEVELOPED LAND USE <br /> Name runoff treatment basin <br /> Bypass: No <br /> GroundWater: No <br /> Pervious Land Use Acres <br /> C, Lawn, Mod 0.0391 <br /> Impervious Land Use Acres <br /> DRIVEWAYS MOD 0.0844 <br /> PARKING FLAT 0.1226 <br /> Flow Frequency Flow (cfs) <br /> 2 Year = 0.0656 <br /> 5 Year = 0.0886 <br /> 10 Year = 0.1051 <br /> 25 Year = 0.1273 <br /> 50 Year = 0.1450 <br /> 100 Year = 0.1636 <br /> Water Quality BMP Flow and Volume for runoff treatment basin. <br /> On-line facility volume: 0.0216 acre-feet <br /> On-line facility target flow: 0. 01 cfs. <br /> Adjusted for 15 min: 0.0335 cfs. <br /> Off-line facility target flow: 0 . 0173 cfs. <br /> Adjusted for 15 min: 0. 0192 cfs. <br /> Runoff Treatment Design Flowrate is 0.0335 cfs. <br />