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• <br /> Determining Number of <br /> C4'..t-NTECH' Cartridges for Flow Based <br /> ENGINEERED SOLUTIONS <br /> Systems <br /> CONTECH Stormwater Solutions Inc. Engineer: CRH <br /> Date 7/23/2014 <br /> Site Information <br /> Project Name Silver Lake Center <br /> Project State Washington <br /> Project Location Everett <br /> Basin ID CB-17A <br /> Drainage Area,Ad 0.57 ac <br /> Impervious Area, Ai 0.36 ac <br /> Pervious Area,Ap 0.21 <br /> %Impervious 63% <br /> Runoff Coefficient, Rc 0.62 <br /> Water quality flow 0.05 cfs <br /> Peak storm flow 0.24 cfs <br /> Filter System <br /> Filtration brand StormFilter <br /> Cartridge height 18 in <br /> Specific Flow Rate 1.00 gpmlft` <br /> Flow rate per cartridge 7.5 gpm <br /> SUMMARY <br /> Number of Cartridges 3 <br /> ©2006 CONTECH Stormwater Solutions <br /> contechstormwater.com 1 of 1 <br />