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` KLEINFELDER <br /> control to Kleinfelder's office and then transported by courier in a sealed container to a state <br /> certified laboratory for the requested analyses. <br /> ` The shovel, stainless steel sampling equipment, and sample tubes were decontaminated between <br /> sample locations with a Liquinoz (laboratory-grade detergent) and potable water wash, followed <br /> ` by a distilled water rinse. <br /> The soils encountered in the sample locations varied from clayey silts in the northern locations to <br /> ` silty sands in the southern section of the site. No obvious soil discoloration or unusual odors <br /> were noted during the sampling activities. <br /> 60 A total of eighteen soil samples and one parent material sample were submitted under chain-of- <br /> custody control to Sequoia Analytical of Sacramento, California. Sequoia is certified by the <br /> State of California to perform the requested analyses. Only the shallowest soil samples collected <br /> from bglLeath the base material from each location were analvazed by IL12h2Ldga The <br /> remaining soil samples were held at t e laboratory pending any further laboratory analysis of <br /> deeper intervals. The six shallow soil samples and rinseate of the parent material were analyzed <br /> for the following; <br /> _ ♦ Hexavalent Chromium by EPA Method 7196 <br /> ♦ Total Petroleum Hydrocarbons as referenced to diesel (TPH-D) by EPA Method 8015B <br /> The samples were submitted on a standard 10 working day tum-around time (TAT). <br /> LABORATORY RESULTS <br /> Hexavalent Chromium <br /> Hexavalent Chromium (Chromium VI) was not detected by the analytical laboratory from the <br /> five^allow soil samples collected from immediately beneath the parking lot base, the perimeter <br /> background sample, or from the rinseate of the parent material. <br /> TPH-D <br /> TPH-D was detected in one of the five shallow soil samples (L2-0") collected from the truck <br /> trailer parking area with a reported concentration of 0.3 mg/l. TPH-D was also detected in the <br /> rinseate of the parent material collected from location Ll with a reported concentration of 0.91 <br /> mg/l. TPH-D was not detected in the shallow perimeter background sample (BGl-0"). <br /> 52495.E01/ST05R268/FB:Iv Page 3 of 6 <br /> 2005,Kleinfelder,Inc. March 8,2005 <br /> L <br />