Laserfiche WebLink
WATER QUALITY SUB-BASIN <br /> Project Name: RITEAID#5231 -EVERETT By: P.A.D. <br /> Project Number: 08028 Date: 12/16/2008 <br /> DRAINAGE CRITERIA: City of Everett Storm Code <br /> RAINFALL METHOD: WWHM method <br /> Step 1)Site Data <br /> 1) General characteristics: <br /> Basin WQ Soil type silty sand <br /> Development type commercial Soil Group C <br /> Size(ac.) 1.19 Existing surface bldg, paving, landscape <br /> Location Everett Sensitive areas no <br /> Detention/Retention None bypass flows no <br /> 2) Precipitation(6 mo) 1.0 in <br /> 3) Developed onsite characteristics: <br /> Pervious acres 0.14 acres <br /> landscape 0.14 acres <br /> Impervious acres: 1.05 acres <br /> paving 1.05 acres <br /> Time of concentration: USE 6.0 MINUTES <br /> Step 2)Hvdrograph Results <br /> 1) Water Quality Design Flow 0.095 cfs <br /> Step 3) Developed stormwater discharge criteria <br /> Provide water quality treatment via a Stormfilter with pretreatment via a Stormceptor <br />