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Determining Number of <br /> CONTECHCartridges for Flow Based <br /> ENGINEERED SOLUTIONS Systems <br /> CONTECH Stormwater Solutions Inc. Engineer: CRH <br /> Date 3/24/2014 <br /> Site Information <br /> Project Name Marine View Drive Apartments <br /> Project State Washington <br /> Project Location Tacoma <br /> Drainage Area, Ad 0.73 ac <br /> Impervious Area, Ai 0.27 ac <br /> Pervious Area, Ap 0.47 <br /> % Impervious 37% <br /> Runoff Coefficient, Rc 0.38 <br /> Water quality flow 0.02 cfs <br /> Peak storm flow 0.08 cfs <br /> Filter System <br /> Filtration brand StormFilter <br /> Cartridge height 27 in <br /> Specific Flow Rate 1.00 gpm/ft` <br /> Flow rate per cartridge 11.3 gpm <br /> SUMMARY <br /> Number of Cartridges 1 <br /> i <br />* ©2006 CONTECH Stormwater Solutions <br /> contechstormwater.com 1 of 1 <br />