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5 <br /> k'" KLEINFELDER <br /> An employee owned company <br /> File No. 20-3420-02.1301 <br /> September 12, 1997 <br /> Ms. Jeanette Pombo <br /> Pombo Real Estate <br /> Post Office Box 805 <br /> Tracy, California 95378 <br /> SUBJECT: LIMITED SOIL SAMPLING AND ANALYSIS <br /> FORMER UNDERGROUND TANK LOCATION <br /> 11847 VALPICO ROAD <br /> TRACY, CALIFORNIA <br /> Dear Ms. Pombo: <br /> In accordance with your request and authorization we sampled the soil from beneath the <br /> location of the former underground storage tank at the above-referenced project site. The <br /> work was witnessed by Mr. Steve Sasson of the San Joaquin County Public Heath <br /> Services Department Environmental Health Division. It is our understanding that the <br /> tank was removed about 1994. <br /> On August 22, 1997, Mr. Roman Racca, a Kleinfelder project geologist, obtained one (1) <br /> discrete soil sample. The soil sample collected at a depth of 7 feet, was obtained with the <br /> use of a 843 Bobcat loader with power auger. This method was required because of <br /> remnant concrete debris in the soil which eliminated the use of hand augering equipment. <br /> There was no obvious petroleum odor or soil discoloration observed at the tank location <br /> during sample collection. The sample was obtained by pushing a laboratory-clean brass <br /> sample tube into the soil. The end of the tube was covered with Teflon film and tight- <br /> fitting plastic caps. The sample was labeled and logged on a chain of custody record. <br /> The sample was transported under chain of custody protocol to Sequoia Analytical of <br /> Sacramento, California. Sequoia is certified by the State of California Department of <br /> Toxic Substances Control for the requested analyses. The sample was subsequently <br /> analyzed for the presence and concentration of: <br /> • Fuel Fingerprint (TPH-Extractable as referenced to JP-4, JP-5, Kerosene, Diesel and <br /> Lubricating Oil) by EPA Method 8015M <br /> 20-3420-02.130 1/201711465 Page No. I of 4 <br /> Copyright 1997, Kleinfelder. Inc. September 12, 1997. <br /> KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax <br />