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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,June 15,2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 8 of 14 <br /> P O Box 2089 <br /> Stockton, CA 95201-2089 <br /> Total Petroleum Hydrocarbons-Gasoline <br /> Sample Information <br /> Sample ID MW 3-5 Sample Type Grab <br /> Laboratory 10• 0401800-04 Project Name. Port of Stockton UST Site No 3 <br /> Date/T zme Sampled 21-May-04 13 52 by Jim Neal Sample Matrix Ground Water-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Pre ared Analysis Date Method Notes <br /> i TPH-Gasoline ND 100 ug/1 1 AF41505 27 May-04 28-May-04 Lt1FT GC/MS <br /> Surrogate 4-Bromofluorobenzene 92% 75-125 <br /> �I <br /> mg z-milligrams per liter-ppm DLR-Detection Limitfor Purpose of Reporting <br /> ugI-micrograms per L+ter-ppb Excepltonal sample matrices or interferences may <br /> resvlt to higher detection limits <br /> ECTFULLY SUBMITTED, <br /> Jonathan Le, Laboratory Director <br /> 7743 N West Lane Suite B2 Stockton CA 95210 nhone (209) 477-8105 Fax (209) -177-81-�R <br />