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Soil Suitability Study Sheet 3 of 4 <br /> Soil Profile Test (Cont ' d) : <br /> Two basic soil layers were found in excavating to <br /> the 12-foot depth on Parcel No . 1 for the Soil <br /> Profile Test . The first layer is a grey, clay <br /> material to 2 . 5 feet below the ground surface . The <br /> second layer from 2 . 5 feet to 12 feet below the <br /> ground surface, was found to be a brown sandstone <br /> material . The approximate location of the Soil <br /> Profile Hole is shown on the attached "Parcel Map" . <br /> Percolation Tests : <br /> Three percolation tests were performed, two on <br /> Parcel No. 1 and one other on Parcel No . 2 , in <br /> accordance with the percolation test procedures <br /> outlined in the "Manual of Septic Tank Practice" , <br /> published by Department of Health, Education and <br /> Welfare and requirements of the San Joaquin County <br /> Public Health Service, Environmental Health <br /> Department . All three percolation tests were <br /> conducted with perforated metal pipe in place in <br /> the test hole to prevent undue sloughing . However , <br /> Percolation Test Hole No . 1A was also tested <br /> without the perforated metal pipe in place in the <br /> test hole. No differences in the percolation rate <br /> were noted with or without the use of the <br /> perforated metal pipe. <br /> On February 12 and 13 , 1991 , the three percolation <br /> tests were performed on the above referenced <br /> property under my direction in conformance with San <br /> Joaquin County Ordinance No. 549 . The approximate <br /> location of the test holes are shown on the <br /> attached "Parcel Map" . <br /> Percolation Test Hole Nos . IA, 1B & 2 resulted in <br /> percolation rates of 60 . 0 minutes per inch, 68 . 5 <br /> minutes per inch and 48 . 0 minutes per inch as <br /> determined on the attached Field Note sheets . <br /> Well Water Analysis And Recommendation: <br /> There is a domestic well on the north end of the <br /> improved 1 . 89 acre Parcel No. 2 , in front of the <br /> garage. The domestic well water was sampled for <br /> nitrates and found to be 26 mg/1 . The well water <br /> analysis was performed by FGL Environmental and is <br /> shown on the attached letter dated February <br /> 21 , 1991 . The test result of the nitrate sample is <br /> within tolerance . No special requirements are <br /> necessary for any proposed wells . <br /> MS-91-21 --- Rick DeHoyos <br />