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rPRECISION <br /> MPb— ENVIRO-TECH <br /> MM6.0.) Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,June 15, 2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 10 of 14 <br /> P 0 Box 2089 <br /> Stockton, CA 95201-2089 <br /> Total Petroleum Hydrocarbons-Gasoline <br /> Sample Information <br /> Sample ID MW 3-6 Sample Type- Grab <br /> Laboratory ID 0401800-05 Project Name Port of Stockton UST Site No 3 <br /> Date/Time Sampled 21-May-04 13 35 by Jun Neal Sample Matrix Ground Water-Non Potable <br /> ETevrameter Result DLR Unit Dilution Batch Prepared Analysis Date Method Notes <br /> i TPH-Gasoline 327 100 ug/1 1 AF41505 27-May-04 28-May-04 LUFT GC1MS <br /> Surrogate 4-Bramofluorobenxene 92% 75-125 j <br /> mg L=milligrams per Liter-ppm DLR-Detection Limit for Purpose of Reporting <br /> ug L-micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits <br /> orECTFULLY SUBMITTED, <br /> 7�:W41'r�_ �____ <br /> Jonathan Le, Laboratory Director <br /> 7743 N West Lane Suite B2 Stockton CA 95210 phone (209) 477-8105 Fax (209) 477-8148 <br />