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CITY OF SANTA ANA <br />Planning and Building Agency <br />Project No.: D-6289-08 <br />St. Barbara Catholic School <br />Percolation -Infiltration Tests <br />Porchet Method <br />Approved <br />FOR PERMIT ISSUANCE <br />ftA__ .... ire. <br />Percolation Test <br />Tested Infiltration Rate, (It) <br />Tested Infil ign Rate with <br />FOS = 2.0 <br />Inch /hr <br />Inch/hour <br />PC-1 <br />0.842 <br />0.421 <br />PC-2 <br />1.3585 <br />0.679 <br />Average: <br />1.100 <br />0.55 <br />Both the test results show that It > 0.3 inch/hour, thus PASSED. <br />2. Reduction Factor (Rf) Method <br />Infiltration Rate can also be determined using Reduction Factor, Rf as follows: <br />Use the following formula to determine the infiltration rate: <br />Reduction Factor, (Rf ) _ [(2di - Ad)/DIA} + 1 <br />Where, di = Initial Water Depth (in) <br />Ad = Water level Drop of the Final Period or Stabilized Rate (in) <br />DIA = Diameter of the boring (in). <br />Infiltration Rates as calculated by this method have been tabulated on Plates 7 and 8 and <br />presented on Appendix E. The results are as follows: <br />6 <br />