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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,March 29, 2005 <br /> Attention. Jack Bishop <br /> California Tank Lines Report Page 15 of 21 <br /> P O BOX 6245 <br /> Stockton, CA 95206 <br /> Total Petroleum Hydrocarbons-Gasoline <br /> Sample Information <br /> Sample ID: MW-4 Sample Type: Grab <br /> i Laboratory ID. 5031206-04 Project Name: QM Q1 2005 <br /> * Date/Time Sampled. 11-Max-05 14 45 by Sorenson Sample Matrix: Ground Water-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Pr ared Analysis Date Method Notes <br /> TPH-Gasoline 5310 100 Ug/1 1 AC51509 15-Mar-05 15-Mar-05 LUFT/GCMS <br /> Surrogate 4-Bromotluorobenzene 94% 75-125 <br /> e <br /> r <br /> L <br /> mg/L=milligrams per Luer=ppm DLR—Detection Limit forPurpose of Reporting <br /> ug/L=micrograms per Luer=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits <br /> �PECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Duector <br /> 7743 N West Lane Suite B2 Stockton CA 95210 vhone (209) 477-8105 Fax (2 09) 477-8148 <br />