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IleCASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br />' Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Sampled 6-21-01 <br /> of Northern California Reference Number 3849 Received 6-22-01 <br />' 837 Shaw Road Sample Description Water Extracted 6-28-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030!8260 Analyzed 6-28-01 <br /> Attn Tim Cuellar Lab Numbers 3849-16W Reported 7-5-01 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br />' ANALYTE REPORTING SAMPLE ID <br /> LIMIT k2B <br />' 062101 <br /> (pg/L) (N !L <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 NO <br /> Di-isopropyl Ether (DIPE) 050 NO <br />' Ethyl tert-Butyl Ether (ETRE) 050 ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND <br />' tent-Butanol(TBA) 20 NO <br /> tVOLATILE HALOCA BONS <br /> 1,2-Dichloroethane (1 2-OCA) 050 NO <br />' Ethylene Dibromide (EDB) 050 ND <br />' Report Limit Multiplication Factor 50* <br /> 1 <br /> * Increased reoortina limit due to matrix interferences <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 959% <br /> Toluene-d8 998% <br /> Instrument ID HP 5972MS <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 /> (pglL)= micrograms r liter or parts pe ion (ppb) <br /> ANALYST APPROVED B;Phillips <br /> Clan J Cone Director <br />