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J. H . KLEIN FELD ER & ASSOCIATES <br /> GEOTECHNICAL CONSULTANTS - MATERIALS TESTING <br /> LAND & WATER RESOURCES <br /> 2825 EAST MYRTLE STREET <br /> STOCKTON. CA 95200-4794 <br /> t209i 918-134S File No. 20-2568-01 RTH <br /> July 15, 1987 D j�� (� <br /> Ll <br /> Mr. Carl D. Navarra JUL 2 0 1987 <br /> c/o Quartaroli & Associates ENVIROMENTAL HEALTH <br /> 160 Northgate FERMIT/SERVICES <br /> Manteca, CA 95336 <br /> Subject: PERCOLATION TESTS <br /> PROPERTY LOCATED ON DU AM FERRY ROAD <br /> SAN JOAQUIN COUNTY, CSA MS-87-46 <br /> Dear Mr. Navarra: �- <br /> As requested on May 20, 1987, a representative of our firm performed two per- <br /> colation tests at the subject site. In addition, two soil profile borings were <br /> drilled adjacent to the percolation test holes. The approximate locations at which <br /> the percolation tests and soil profile borings were performed are shown on the <br /> attached site sketch. <br /> The soil profile borings were drilled on July 8, 1957, using a truck-mounted <br /> drill rig with continuous flight auger. The test borings extended to depths of <br /> approximately 10 feet below existing ground surface. The Logs of Test Borings <br /> are presented on Plates H and III of this letter. All soils have been <br /> classified according to the Unified Soil Classification System presented on <br /> Plate I. <br /> The percolation test holes were drilled and set-up on July 8, 1987, by a repre- <br /> sentative of our firm. Approximate 36-inch deep borings were drilled and 4-inch <br /> inside diameter slotted PVC pipe was inserted into the borings. The test holes were <br /> then filled to the surface with relatively clean water and left to soak overnight. <br /> The following day, July 9, 1987, a representative of our firm returned to the <br /> site to perform the percolation tests. The tests were performed according to San <br /> a •. <br /> Joaquin County guidelines arta 'the last� ,;C minutes o,.c each <br /> gest was Observed by a <br /> County Health Sanitarian. The percolation rates were measured at 60 and 40 minutes <br /> per inch for tests 1 and 2, respectively. The county approved test sheet is attached <br /> to this letter. <br /> We trust this letter presents the information requested at this time. If <br /> you have any questions regarding this project, please contact us. <br /> Respectfully submitted, <br /> J. H. KLEINFELDER & ASSOCIATES <br /> Ron Heinzen, C. E. <br /> SRD:rls <br /> ` <br /> OTHER WEEK b`1pS48/cc w/Attacks.: San Joaquin Local Health District <br /> Walnut Creek•Sunnyvale-San Ramon-Sacramento-Fresno•Fairtield-Rohnert Park-Merced•Los Angeles•Reno•Las Vegas-St.George,Utah 0 Denver <br />