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' LABORATORY <br /> ` CASTLE ANALYTICAL <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Top Filling Station Sampled 07-23-03 <br />' of Northern California Reference Number 5924 Received 07-25-03 <br /> 837 Shaw Road Sample Description Sod Extracted 07-25-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015M,8020 Analyzed 07-25-03 <br /> Attn. Tim Cuellar Lab Numbers 5924-6S,7S Reported 08-18-03 <br /> I <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID <br />' MW8-40 MW8-55 <br /> (mg/kg) (mg/kg) (mg/kg) <br /> BENZENE 00050 ND ND <br />' TOLUENE 00050 NO NO <br /> ETHYLBENZENE 000,50 ND ND <br />' TOTAL XYLENES 00050 NO ND <br />' <br /> GASOLINE RANGE <br /> HYDROCARBONS 10 NO NO <br />' Report Limit Multiplication Factor 1 1 <br /> 1 <br />' Surrogate%Recovery Flo 743%1 RD 752% FID W4%1RD 912% <br /> Instrument ID VAR-GCI VAR-GC1 <br />' Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br />' ANALYST APPROVED BY 'f <br /> Clan J Cane Jam,fief 0 Phillips <br /> oratory Arrector <br />