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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM <br />(NPDES) <br />uig"wkm ZT*x-'% DID •ft�-% � 1 2 a 10 <br />WIVOIGOIINOR <br />Sedimentation Pond Requirements <br />Assumptions: <br />Rainfall Intensity = 0.1311 / hour (100 year storm frequency <br />24 hour duration) = 3.1211 total <br />Area of runoff = 135 acres or 5,880,600 S.F. <br />Coefficient of runoff = 35% <br />5,880,600 S.F. x 3.1211/12"/Ft. x 3501 x 7.48 gal/cu.ft. <br />4,002,806 gallons <br />Existing sedimentation pond size =10,000,000 gallons <br />6 <br />Prepared by: <br />John Fukuxaoto <br />R.C.E. 26987 <br />