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Odyssey Landscape—Soil Suitability Section Page 8 of 13 <br /> Our Project Number: NA157000 <br /> March 17, 2015 <br /> Percolation tests were conducted for the borings on February 19, 2015 in accordance with the <br /> requirements of the San Joaquin County EHD. The percolation test had a duration of four <br /> hours. The last half an hour of the test was observed by Michael Escotto, Registered <br /> Environmental Health Specialist (RENS), EHD. <br /> Measurement of the water level during the percolation tests 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 C) are in decimal feet. After water drop was <br /> observed, the holes were checked for refill. The holes were refilled as necessary to maintain <br /> approximately 0.5 feet (6 inches) of water above the bottom level of the percolation test holes. <br /> The readings were taken every 30 minutes for a period of four (4) hours. <br /> 1.6.6 Percolation Test Forms and Results <br /> The completed percolation test form with Michael Escotto's REHS verification signature is <br /> included in Appendix C of this report. A shallow percolation test is defined by the EHD as being <br /> between 36 and 42 inches in depth; a satisfactory percolation rate for a shallow test is less than <br /> or equal to 60 minutes per inch drop. The percolation test must demonstrate a satisfactory <br /> percolation rate within the existing septic system disposal field of a parcel to utilize a standard <br /> septic system. Details of the percolation tests are summarized in the table below. <br /> Table 2. <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 3.25 11.9 4-hr Satisfactory percolation <br /> 02-19-2015 rate <br /> Note: A satisfactory percolation rate for a'shallow"test is less than or equal to 60 minutes per inch. <br /> 1.6.7 Discussion of Percolation Test Results <br /> The silty sand soils within the 0 to 3.25 foot range demonstrate a satisfactory percolation rate <br /> in accordance with EHD requirements. �. <br /> 1.6.8 Discussion of Septic System Sizing <br /> The foregoing investigation and percolation test results indicate the site is suitable for the <br /> existing septic system, which is compliant with San Joaquin County On-Site Wastewater <br /> Disposal Standards. <br /> ©2015 Neil O.Anderson&Associates,Inc. <br /> A Terracon Company <br />