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Dwain C . Tosch <br /> Civil Engineer <br /> CE #14644 <br /> 1229 Golden ak Way <br /> Stockton, CA 95209, <br /> Phone: (209) 478-4606; <br /> San Joaquin Local Health Distriat <br /> Enviromental Health District; <br /> Subject: Percolation Test (Parcel Map No. MS-88-59, Parcel "A" <br /> Submitted for your review is the result of one percolation <br /> test, Performed on the Merlyn and Lillian Petz property located <br /> at 25647 Bird Road, Tracy,, California. <br /> The planned development proposes splitting, a 20 acre <br /> nareel into Parael "A" - 1. 5 acres and Parcel 'B" - 18. 5 acres. <br /> rh,e test was performed in accordance with the percolation <br /> test procedure outlined in the "Manuel of Septic Tank Practice" <br /> nub,lished by the U. S. Department of Health, Education and <br /> Welfare, and )Pr requirements of the San Joaquin Health <br /> Denartment. <br /> Eng?ineers ' s Certificate: <br /> On January 22 and 23, 1990, one percolation test was <br /> Performed on the above property by me in conformance with <br /> San Joaquin Ordinance No. 549. The approximate location of <br /> the percolation and soil profile holes are shown on the <br /> attached Parcel map. <br /> A iercolation rate of 120 minutes per inch was determined. <br /> Groundwater was encountered at 9' 6" and rose to 9' 0" <br /> overnight. <br /> An alternate se-)tic system designed by a State of California <br /> Registered Engineer is recommendended. <br /> Dwai-n C. Tasch <br />