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I <br />' CASTLE ANALYTICAL LABORATORY _ <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 - <br /> ICertificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvircnmental Inc Client Project ID Cal Fuels Sampled 10-07-04 <br />' of Northern Cal forma Refe,ci re Number 7440 Received 10-08-04 <br /> 837 Shaw F-n id Sample Description Water Extracted 10-13-04 I <br /> Stockton CA 95215 Sat pie Prep/Analysis Method EPA 5030/8260 Analyzed 10-13-04 <br /> Attn Turn Cuellar Lab Numbers 7440-6W 7W 8W, 9W, 10W Reported 10-20-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCJMS <br />' ANALYTE REPORTING SAMPLE 1D SAMPLE ID SAMPI E ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 6 MW 7 MW 8 MW 9 MW 10 <br />' 100704 100704 100704 100704 100704 <br /> (pg/L) (ug) (a9/L) (lig/L) (Vg/L) /L <br /> FUEL OXYGEN_ATES <br />' Methyl tert-Butyl Ether(MTBE) 050 ND ND ND ND ND <br /> Di-isopropyl Ether (DIPS) 050 ND ND ND ND ND <br />' Ethyl tert-Butyl Etner (ETRE) 050 ND ND NO NO ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND NO ND NO ND <br /> lie tert-Butanol(TBA) 20 NO ND ND NO NO <br />' VOLATILE HALOCARBONS <br /> 1 2-❑ichloroethane (1 2-OCA) 050 ND ND ND ND NO <br />' Ethylene Dibromide (EDB) 050 NO NO ND ND ND <br /> Report Limit Multipkcation Factor 1 1 1 1 1 <br /> 1 <br /> Surrogate Recoveries <br /> 1,2-Dichlereethane-d4 882% 860% 867% 920% 94 6% <br /> Toluene-d8 960% 92 8% 875% 927% 958% <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 /> (,,,glL,= rrnscrograms per Ifter or part r billi n(ppb) <br /> APPROVED BY APPROVED BY <br />' Clart J Cone Ja s C hrlltps <br /> Laboratory Manager L oratory Director <br /> 1 <br />