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lie <br /> CASTLE ANALYTICAL LABORATORY <br />' Environmental 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 Pac Car Wash Sampled 11-25-03 <br />' of!Northern California Reference Number 6371 Received 12-02-03 <br /> 837 Shaw Road Sample Description Water Extracted 12-08-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-08-03 <br /> Attn Tim Cuellar Lab Numbers 6371-36W, 37W, 38W, 39W,40W Reported 12-18-03 <br />' GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br />' LIMIT MW 18B MW 18C MW 18D MW 18E MW 19A <br /> 112503 112503 112503 112503 112503 <br /> (pg/L) (u /L) (ug/L (ug/L (ug/L (ug/ <br />' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 1 9 NO NO ND 31 <br /> Di-isopropyl Ether (DIPE) 050 NO NO NO NO NO <br /> Ethyl tert-Butyl Ether (ETRE) 050 NO NO ND NO ND <br />' tert-Amyl Methyl Ether(TAME) 050 ND ND NO NO NO <br /> tert-Butanol(TBA) 20 NO ND NO NO NO <br /> IVOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 ND 1 0 ND NO 0 95 <br /> Ethylene Dibromide (EDB) 050 NO NO ND NO ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate Recoveries <br /> I 1 2-Dichloroethane-d4 102% 113% 907% 818% 968% <br /> Toluene-d8 992% 100% 920% 932% 996% <br /> Instrument ID HP 5972 MS <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 /> (pg/L)= microg7spe ter or parts per billion(ppb) <br /> ANALYST APPROVED BY <br /> Clary J Cone Jame C Phillips <br /> La story Director <br />