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CIS!INC: AM K....A.-SO.150 Noehwaaas h IM-W IM F..01)WAM <br /> CTE#25-0710G <br /> INFILTRATION RATE PER PORCHET METHOD <br /> Reference:"Rlveiside Counly-I ow hnped Development RMP Design Handbook'(.Page 20) <br /> Percolation Data at the Final Interval <br /> diam= 6" Time Interval At=30 min(P2) Time Interval At= 10 min(P2&P3) <br /> Initial Depth of Change in Height Average Head Over <br /> Water in Final Depth of Water in of Water in inches Time Interval in <br /> radius= 3'' inches(D ) inches (D j) (AH) inches(H..,•) <br /> P2: 6.00 5.50 0.50 5.75 <br /> 4 1111. f Infiltration Rate I,= Infiltration Rate k=(AH 60 r)Lt(r+2K,4) <br /> 110. <br /> H(P2)=6.0" P2: h= (0.5 in)(60)(3 in)/(30 min)(3 in +2(5.25))= 0.21 In/hr <br /> ' 1 <br /> Infiltration Rate in gal I sf/day= It(in/hr)(24 hr/day)(7.48 gal I cf) (ft/12 in) <br /> P2= 3.10 gal I sf I day <br />