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k" KLEINFELDER <br /> File No. 20-1146-91ND w <br /> September 27 , 1991 <br /> Hershall Travis <br /> SEP 3 0 191 <br /> 11266 North Micke Grove Road ENVIRONMENTAL HEALTH <br /> Lodi, CA 95240 PERNIIUSERVICES <br /> Subject: PERCOLATION TEST RESULTS <br /> 11266 NORTH MICRE GROVE ROAD <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> MS-91-102 <br /> Dear Mr. Travis : <br /> As requested, on September 24 , 1991, representatives of our firm <br /> drilled and set up one approximate 9-1/2-foot deep and one <br /> approximate 15-foot deep percolation test hole at the approximate <br /> locations indicated on Plate I. The test holes were drilled with <br /> a truck-mounted drill rig equipped with 6-inch diameter continuous- <br /> flight augers . The test holes were cased with slotted PVC pipe, <br /> filled with approximately 3 feet of water, and left to soak <br /> overnight. <br /> A representative of our firm returned to the site on September 25, <br /> 1991, and performed the percolation tests per San Joaquin County <br /> guidelines . The tests were performed for a period of 4 hours, and <br /> the last 30 minutes were used to calculate the percolation rates. <br /> Percolation rates of 20 and 5 minutes per inch were obtained for <br /> tests P-1 and P-2 , respectively, at a depth of approximately 9-1/2 <br /> feet below existing ground surface. The County approved <br /> percolation field test sheets are included with this letter. <br /> We trust this letter presents the information requested at this <br /> time. If you have any questions please contact us. <br /> Respectfully submitted, <br /> KLEINFELDER, INC. <br /> Steven R. Davis, C.E.G. <br /> Engineering Geologist <br /> Ron Heinzen, G. . <br /> Regional Manager <br /> SRD: sd <br /> Attachments <br /> cc: R. W. Siegfried/San Joaquin County Environmental Health <br /> KLEOPPYCiOt "lgq� L��St�fR�l� ��Str [;Stockton, CA 95205 (209) 948-1345 <br />