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CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax {209) 384-1507 <br />' Advanced GeoEnvironmental, Inc Client Project 1D Pacific Car Wash Sampled 11-21-97 <br /> of Northern California Reference Number 1346 Received 11-25-97 <br /> 4005 N Wilson Way Sample Description Sod Extracted See Below <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015M, 8020 Analyzed See Below <br />' Ann Tim Cuellar Lab Numbers 1346-9S, 10S, 38S, 11S, 12S Reported 12-8-97 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW4-20 MW4-30 MW4-35 MW4-40 MW4 50 <br /> (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br />' MTBE 0 010 NO ND ND NO ND <br /> BENZENE 00050 ND ND ND NO NO <br />' TOLUENE 00050 ND ND NO NO ND <br /> ETHYL BENZENE 00050 ND ND NO ND NO <br /> TOTAL XYLENES 00050 ND ND NO ND NO <br /> GASOLINE RANGE <br />' HYDROCARBONS 10 NO NO NO ND NO <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br />' Date Extracted 11 26-97 11-26-97 12-3-97 11-26-97 12-4-97 <br /> Date Analyzed 11-29-97 11-29-97 12-3-97 11-29-97 12-5-97 <br /> Surrogate % Recovery Ftp 12D%1 PID 118% FID 134%1 PID 132% FID 90 5%1 PID 90 5% f!D 88 8%!PID 84 B% Ftp 88 4%1 P11)85 8% <br /> ]nstrument ID VAR-GC1 VAR-GC1 VAR-GCI VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br />' Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> Clary J Cone Ja es hillrps <br /> .11'nvironmental Lab director <br /> 1 <br />