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Dykxhoorn Page 7 of 9 <br /> Project Number: E07024B <br /> Date: October 31, 2007 <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on October 10, 2007 in accordance with the <br /> requirements of the EHD. A percolation tests with duration_gf-fGur-hours-+vas-pe for <br /> each hole. The last half hour of each test was observed by�r. Ted Tasiopoulos, of the EHD. l / <br /> a <br /> Measurement of the water level during the percolation test was from a fixed reference point on <br /> the PVC casing using an electric well sounder with a depth accuracy of 1/100th foot. All <br /> tabulated values on the field data sheet (appendix) are in decimal feet. After water drop was <br /> observed, the holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) <br /> of water above the bottom level of the percolation test hole. The readings were taken every 30 <br /> minutes for a period of four hours. <br /> _ 6.6 Percolation Test Forms and Results _ <br /> The completed percolation test form is included in the',appendix df this report. <br /> A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a <br /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. <br /> A deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory <br /> percolation rate for a deep test is 30 min/in or less. One percolation test must demonstrate a <br /> satisfactory percolation rate within the proposed septic system disposal field of each parcel to <br /> utilize a standard septic system. Details of the percolation tests are summarized in the table <br /> below. <br /> Table 3. <br /> ` <br /> Summary of Percolation Tests <br /> Test No., Percolation Test Percolation Rate Test Duration Comments <br /> Date Tested Depth (ft.) (minutes/inch) (see notes) <br /> P-1 (shallow) 3.30 4.71 4-hr Satisfactory perc rat <br /> 10-10-07 <br /> P-2 (shallow) 3.254.0 4-hr Satisfactory perc rate <br /> 10-10-07 <br /> Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. <br /> r A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> 6.7 Discussion of Percolation Test Results <br /> The soils within the sewage disposal areas of the site have demonstrated a sati <br /> percolation rate in accordance with the requirements of the EHD for the use of standard <br /> septic system. <br /> 6.8 Discussion of Septic System Sizing <br /> L <br /> 6. 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil O.Anderson&Associates,Inc <br />