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Ar <br /> August 10 , 1990 <br /> Dwain C . Tosch <br /> Civil Engineer <br /> CE # 14644 <br /> 1229 Goldenoak Way <br /> Stockton, CA 95209 <br /> Phone : ( 209 ) 478-4606 <br /> San Joaquin Local Health District <br /> Enviromental Health Division <br /> Subject : <br /> Supplement Soil Suitability Study (Parcel Map No. <br /> MS-90-91 ) <br /> Submitted for your review are the results of a <br /> Supplement Soil Suitability Study on the Seferina <br /> Disch property located at 13525 East Liberty Road, <br /> Galt, CA 95632 . <br /> PERCOLATION TEST <br /> A tentative deep percolation test hole was drilled <br /> August 4, 1990, near the location of the first <br /> percolation test hole. Perched water was encountered <br /> at 20 feet . Water rose to 10 feet overnight . There <br /> are two beaver ponds on Coyote Creek on the subjects <br /> property. <br /> After encountering water in the proposed deep <br /> percolation test hole a shallow percolation test <br /> hole site was selected at a different location. <br /> A percolation rate of 48 minutes per inch is the <br /> result of this test and a 10,000 Sq. Ft . minimum <br /> disposal area is recommended. <br /> The percolation test was performed in accordance <br /> with the percolation test procedures outlined in the <br /> "Manual Septic Tank Practice" , published by the <br /> U. S. Department of Health, Education and Welfare, <br /> and per requirements of the San Joaquin County <br /> Local Health District . <br /> On August 8 , 1990 , a percolation test was performed <br /> by me on the above referenced property in conformance <br /> with the San Joaquin Ordinance No. 549 . The approximate <br /> location of the percolation test hole and soil profile <br /> hole are shown on the accompanying Detail Map. <br />