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CASTLE ANALYTICAL LABORATORY <br /> 2930 <br /> Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384- <br />' Fax (209)384-15071507 <br /> Certificate#2480 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Car Wash Sampled 10-23-03 <br />' of Northern California Reference Number 6256 Received 10-24-03 <br /> 837 Shaw Road Sample Description Sod Extracted 10-29-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 10-30-03 <br /> Attn Tim Cuellar Lab Numbers 6258-4S,6S, 11S 13S Reported 11-07-03 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br />' ANALYTE REPORTING SAMPLE iD SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-18-30 MW-18-40 MW-18-65 MW-18-75 <br />' m /K m /K m /K (mg/Kg) (mg/Kg) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 0 010 ND ND ND ND <br /> Di-isopropyl Ether (DIPE) 0 010 ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 0 010 ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 0 010 ND ND ND ND <br />' • tart-Butanol(TBA) 0 800 ND ND ND ND <br />' VOLATI HALO ARSONS <br /> 1,2-Dichioroethane (1,2-DCA) 0 010 ND ND ND ND <br /> Ethylene Dibromide (EDB) 0 010 ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 812% 825% 79 'I% <br /> Toluene-d8 804% 879% 862% 636% <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 o arts per million(ppm) <br /> 0 ANALYST APPROVED BY <br /> Clan J Cone Ja es �Ilips <br /> boratory Director <br />