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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384-2930 <br />' Certificate#12480 Fax (209)384-1507 <br /> Advanced GeoEnviron mental Inc Client Project ID Pacific Car Wash Sampled 10-21-03 <br />' of Northern California Reference Number 6241 Received 10-22-03 <br /> 837 Shaw Road Sample Description Sod Extracted 10-23-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 10-23-03 <br /> Attn Tim Cuellar Lab Numbers 6241-1 S,2S 5S,7S,9S Reported 11-07-03 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> 1 <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-17-45 MW-17-50 MW-17-65 MW-17-75 MW-17-85 <br />' (m IK m IK ) (mg/K m IK m /K (mg/Kg) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 0 010 0 038 ND ND NO ND <br /> Di-isopropyl Ether (DIPS) 0 010 NO ND ND ND NO <br />' Ethyl tert-Butyl Ether (ETSE) 0 010 NO NO NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 0 010 ND NO NO ND ND <br />' .tert-Butanol(TBA) 0 800 NO ND NO NO NO <br /> VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane 0 2-DCA) 0 010 ND ND ND NO NO <br />' Ethylene Dibromide (EDB) 0 010 NO ND ND NO NO <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> 1 <br /> Surrogate Recoveries <br /> 12-uicnioroeinane-04 37 91% 87 10% 1000/ 7C 40/ <br /> Toluene-d8 734% 698% 650% 846% 610% <br />' Instrument ID 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 /> mg/Kg = milligrams per kilogram or parts per million(ppm) <br /> 1 <br /> OANALYST APPROVED BY <br />' Clari J Cone qLap6ratory <br /> s <br /> tor <br /> 1 <br />