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Waddell Property Page 6 of 8 <br /> NOA Job Number: E07156A <br /> November 1, 2007 <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on October 9, 2007 in accordance with the <br /> requirements of the EHD. A percolation tests with duration of four (4) hours was performed for <br /> each hole. The last half an hour of each test was observed by Michael Escotto, Registered <br /> 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 3. <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) 3.35 250 4-hr Failing perc rate <br /> 10-09-07 <br /> P-2 (deep) 24.35 3.2 4-hr Satisfactory perc rate <br /> 10-09-07 <br /> P-3 (shallow) 3.15 250 4-hr Failing perc rate <br /> 10-09-07 <br /> P-4 (deep) 24.25 5.9 4-hr Satisfactory perc rate <br /> 10-09-07 <br /> Note: A satisfactory percolation rate for a'shallow"test is less than or equal to 60 minutes per inch. <br /> A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> For detailed locations of each test hole see the site plan, Plate 1. <br /> 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil 0.Anderson&Associates,Inc <br />