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Olive Garden <br /> Everett,WA <br /> 9/12/2013 <br /> Existing condition-Olive Garden <br /> Area(in acres) <br /> roof,sidewalk,or pavement 051 <br /> C,for roofs and pavements 0.9 <br /> Time of Concentration 5 <br /> m 6.31 <br /> n 0.575 <br /> I(10yr)= 2.5 <br /> C I A <br /> Q=CIA 0.90 2.5 0.51 <br /> Q(10)= 1.15 <br /> Proposed condition <br /> Area(in ac.) C C*A <br /> Landscape 0.135 0.25 0.03375 <br /> roof,sidewalk,or pavement 0.379 0.9 0.3411 <br /> Totals 0.514 0.37485 <br /> Weighted C for proposed= 0.73 <br /> Time of Concentration 5 <br /> m 6.31 <br /> n 0.575 <br /> 1(10yr)= 2.5 <br /> C I A <br /> Q=CIA 0.78 2.5 0.51 <br /> Q(10)= 0.99 <br />