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CASTLE ANALYTICAL LABORATORY <br /> 1 nvironmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 11-25-02 <br /> of Northern California Reference Number 5269 Received 11-26-02 <br /> 837 Shaw Road Sample Description Water Extracted 12-02-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-02-02 <br /> Attn Tim Cuellar Lab Numbers 5269-11 W, 12W, 13W Reported 12-06-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> I LIMIT MW 10B MW 11 MW 12 <br /> 112502 112502 112502 <br /> (pj/L) (ug/L (ug/L (u /L <br /> FUEL OXYGENATES <br /> Methyl tert-Buty€Ether(MTBE) 0 50 66 1 9 ND <br /> Di-isopropyl Ether (DIPE) 0 50 NO ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 NO NO NO <br /> lie tert-Amyl Methyl Ether(TAME) 050 NO ND ND <br /> tert-Butanol(TBA) 20 ND ND ND <br /> IVOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 0 50 20 NO NO <br /> Ethylene Dibromide (EDB) 0 50 ND NO ND <br /> IReport Limit Multiplication Factor 2` 1 1 <br /> Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 893% 881% 900% <br /> Toluene-d8 965% 970% 104% <br /> Instrument ID Varian Saturn 3 MS& HP 5972 MS <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 /> (lig/L)= microgr rpper liter or per billion(ppb) <br /> OK'-A'-� <br /> ANALYST APPROVED BY <br /> Clara J Cone Jan)-g&.0-Phillips <br /> oratory Director <br />