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1 <br /> CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95309 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Flame Mini Mart Sampled 07-21-03 <br />' of Northern California Reference Number 5916 Received 07-23-03 <br /> 837 Shaw Road Sample Description Soil Extracted 07-25-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 07-25-03 <br /> Attn Tim Cuellar Lab Numbers 5916-1 S,2S, 3S, 4S 5S Reported 07-30-03 <br /> 1 <br />' GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br />' LIMIT MW7-70 MW7-80 MW7-90 MW6-15 MW6-25 <br /> m /K (mg/Kg ) (mg/K (mg/K (m 1K ) (mg/Kg) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 0 010 21 0 022 0 086 ND ND <br /> Di-isopropyl Ether (DIPE) 0 010 ND ND ND ND ND <br />' Ethyl Cert-Butyl Ether (ETBE) 0 010 ND ND ND ND ND <br /> Pert-Amyl Methyl Ether(TAME) 0 010 0 011 ND ND ND NO <br />'• tert-Butanol(TBA) 0 800 ND ND ND ND ND <br />' Report Limit Multiplication Factor t 1 1 1 1 <br /> Report Limit Multiplication Factor for MTBE 2 <br /> I <br />' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 711% 878% 798% 980% 873% <br /> Toluene-d8 636% 825% 800% 840% 753% <br /> Instrument ED 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 /> ANALYST tf j APPROVED BY <br /> Clan J Cone Jams C Phillips <br /> 1110ratory Director <br />