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` PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday, March 13, 2007 <br /> Attention: G uy W.Roy <br /> R&L Diesel Report Page 8 of23 <br /> P.O.Box 2498 <br /> Danville, CA 94526 <br /> Metals by EPA 6000/7000 Series Methods <br /> Sample Information <br /> Sample ID: Under Tank Sample Type: Grab <br /> Laboratory : 7022608-02 Project Name: UST-Waste Oil <br /> Date/Time Sampled: 26-Feb-07 00:00 by Guy W.Roy Sample Matrix: Soil <br /> Test Parameter Result DLR Unit Dilution Batch Pr aced Analysis Date Method :Notes <br /> Silver 0.639 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Arsenic ND 0.500 mg/kg 1 C70504 05-Mar-07 05-Mar-07 EPA 6010A <br /> Barium 1230 0.500 mg/kg 1 C70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Beryllium ND 0.500 mglkg 1 C70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Cadmium 0.194 0.'100 mg/kg 1 070504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Cobalt 4.65 0.500 mglkg 1 070504 05-Mar-07 05-Mar-07 EPA 6010A <br /> Chromium 21.3 0.500 mg/kg 1 C70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Copper 45.2 0.500 mg/kg 1 C70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Mercury ND 0.100 mg/kg 1 170602 06-Mar-07 07-Mar-07 EPA 6020 _ <br /> Molybdenum ND 0.500 mglkg 1 C70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Nickel 21.7 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Lead 80.8 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 6010A T� <br /> Antimony ND 1.00 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Selenium ND 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Thallium ND 0.500. mglkg 1 AC705G4 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Vanadium 29.7 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> Zinc 21.4 0.500 mg/kg 1 AC70504 05-Mar-07 05-Mar-07 EPA 601 OA <br /> mg/l,a milligramsper Liter=ppm DLR=Detection LimitforPurpose of Reporting. <br /> ugT a micrograms per Liter—ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 3935 N. Coronado Ave Stockton CA. 95204 z7hone: (209) 4 7-8105 Fax: (209) 477-8148 <br />