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R <br /> t <br /> ktq KLEINFELDER <br /> An employee owned company <br /> File No. 20744.G01 <br /> February 28, 2003 <br /> Mr. Ken Kjeldsen <br /> Kjeldsen, Sinnock&Neudeck, Inc. <br /> 711 North Pershing Avenue <br /> Stockton, CA 95201-0844 <br /> Subject: PERCOLATION TESTING (REVISED) <br /> LINDBERG PROPERTY <br /> 950 NORTH FINE ROAD <br /> LINDEN, CALIFORNIA <br /> Dear Mr. Kjeldsen: <br /> Kleinfelder is pleased to present the results of our percolation testing for a proposed parcel split <br /> to be located at 950 North Fine Road in Linden, California. On a preliminary basis, we <br /> understand the subject 8-acre project site will be divided into four parcels of 2 acres each. The <br /> site is currently undeveloped farmland. <br /> During the time of our investigation, groundwater was not encountered in any of our borings. <br /> Lines of Equal Depth to Groundwater contour maps (Spring 1981 to Spring 1999) published in <br /> groundwater reports by the San Joaquin County Flood Control and Water Conservation District <br /> show groundwater levels in the project area ranging from about 120 to 170 feet below ground <br /> surface. <br /> The subsurface conditions at the site were explored for our current study on August 23 and <br /> September 3, 2002, by drilling percolation borings to depths of between about 10 and 25 feet <br /> below site grade. Shallower percolation tests (approximately 3.5 feet in depth) were performed <br /> during a previous investigation and failed. Reference is made to our earlier study dated June 16, <br /> 1987 (File No. 20-2925-01), attached. The borings for the current were drilled using a Simco <br /> 2400 truck-mounted drill rig equipped with 6-inch O.D. solid-stem auger. The approximate <br /> percolation test locations for both the shallow failed percolation tests and our current percolation <br /> tests are presented on the attached plate. <br /> Based on our findings, the subsurface soils encountered consisted of surficial brown sandy silts <br /> and clays underlain by interbedded layers of light brown to brown sandy silts and clays and silty <br /> and clayey sands to the maximum depths explored. Based on blow count data, most of the upper <br /> soils can be classified as "hardpan." <br /> The percolation tests were performed on August 28 and September 9, 2002, in accordance with <br /> accepted guidelines using clear potable water. The procedure calls for first placing about 2 <br /> 20744.GOI/ST03R374 February 28,2003 <br /> ©2003 Kleinfelder,Inc. Page 1 of 2 <br /> KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax <br />