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Goehring Property Page 7 of 10 <br /> Our Project Number: E07182A <br /> November 30, 2007 <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on December 16, 2007 in accordance with the <br /> requirements of the EHD. A percolation tests with a duration of four (4) hours was performed <br /> for each hole. The last half an hour of each test was observed by Lisa Medina, Senior <br /> Registered Environmental Health Specialist, EHD. <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 of 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 6. <br /> Summary of Percolation Tests <br /> Percolation <br /> Test No., Test Percolation Rate * Test Comments <br /> Date Tested Depth (ft.) (minutes/inch) Duration (see notes) <br /> P-1 (shallow) 3.20 11.36 4-hr Satisfactory perc rate <br /> 11-15-07 <br /> P-1 (deep) 24.80 62.5 4-hr Failing perc rate <br /> 11-15-07 <br /> P-2(shallow) 3.15 8.62 4-hr Satisfactory perc rate <br /> 11-15-07 <br /> P-2 (shallow) 3.11 83.3 4-hr Failing perc rate <br /> 11-15-07 <br /> P-3 (shallow) 3.20 No movement 4-hr No movement, failed <br /> 11-15-07 <br /> P-3 (deep) 7.60 62.5 4-hr Failing perc rate <br /> 11-15-07 <br /> P-4 (shallow) 1.7 * 11.9 4-hr Gravels and Cobbles, <br /> 11-15-07 Auger refusal at 2.3 feet <br /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil O.Anderson&Associates,Inc <br />