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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater CA 953D1 Phone (209)384-2930 <br /> Certrficate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Cal-Fuels Sampled 01-20-03 <br /> of Northern California Reference Number 5400 Received 01-22-03 <br /> 837 Shaw Road Sample Description Soil Extracted 01-23-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 01-23-03 <br /> Attn Tim Cuellar Lab Numbers 5400-1S 2S,3S 4S Reported 02-06-03 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT EW 1 -20 EW 1 -35 EW 1 -50 EW 1 -65 <br /> (mg/Kg) (mg/Kg) (Mg/Kg) -_(mg/Kg) - - (mg/Kg) <br /> FUEL OXYGENATES <br /> Methyl tent-Butyl Ether(MTBE) 0 010 ND NO ND ND <br /> I <br /> I <br /> Di-isopropyl Ether (DIPE) 0 010 NO NO NO ND <br /> I <br /> Ethyl tert-Butyl Ether (E'€BE) 0 010 NO NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 0 010 ND ND ND NO <br /> • tert-Butancl(TBA) 0 800 ND NO ND NO <br />' Report Limit Multipucation Factor 10" 100' 1 1 <br /> x Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> LTo121-Dichloroethane-cI4 NA NA 788% 771% <br /> uene-d8 NA NA 874% 819% <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 /> mg/Kg = mtltigrams per kilogram or parts per million(ppm) <br /> Or "�—X4 <br /> ANALYST z APPROVED BY <br /> Clair J Cone Jame hrtlrps <br /> L; story Director <br />