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Soil Suitability Study- Sheet 3 of 4 <br /> Existinz Use (Cont ' d) : <br /> Water is supplied to the existing home by a well <br /> situate east and immediately adjacent to the garage <br /> to the north of the home and a leach field is the <br /> present sewage disposal system. <br /> No wells or sewage systems were observed on the <br /> remainder . <br /> Soil Profile Test : <br /> Excavation to a depth of 12 feet was performed for <br /> the soil profile test on the remainder at the <br /> south end of the parcel at the location shown on <br /> the attached Parcel Map. No water was encountered <br /> in excavating to the 12-foot depth. <br /> Two basic soil layers were found in excavating to <br /> the 12-foot depth on the remainder for the Soil <br /> Profile Test . The first layer immediately below the <br /> surface of the ground to a depth of about seven (7) <br /> feet is a brown sand material . From seven (7 ) feet <br /> below the ground surface to a depth of twelve ( 12) <br /> feet , the soil is a brownish clay. The approximate <br /> location of the Soil Profile Hole is shown on the <br /> attached "Parcel Nap" . <br /> Percolation Tests : <br /> Two percolation tests were performed. One was on <br /> Parcel No . 1 ( 1 . 89 Acres) and the other on the 20 .0 <br /> acre remainder . Both were performed in accordance <br /> with the percolation test procedures outlined in <br /> the "Manual of Septic Tank Practice" , published by <br /> Department of Health, Education and Welfare and <br /> requirements of the San Joaquin County Public <br /> Health Service, Environmental Health Department . <br /> Because of the sandy nature of the test holes , both <br /> percolation tests were conducted with perforated <br /> plastic pipe in place in the test hole to prevent <br /> undue sloughing. <br /> On March 19 and 20 , 1991 , two percolation tests <br /> were performed on the above referenced property <br /> under my direction in conformance with San Joaquin <br /> County Ordinance No . 549 . The approximate location <br /> of the test holes are shown on the attached "Parcel <br /> Map" . <br /> Percolation Test Hole Nos . 1 , & 2 resulted in <br /> percolation rates of 10 . 0 minutes per inch, 8 . 6 <br /> minutes per inch , respectively as determined on the <br /> attached Field Note sheets . <br /> NIS-91 -80 --- Robert Mathias <br />