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Ile <br /> CASTLE 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 Protect ID Cal Fuels Sampled 6-20-01 <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 3849-6W,7W,8W, 9W, 10W Reported 7-5-01 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW7 MW8 MW9 MW11 MW12 <br />' 062001 062001 062001 062001 062001 <br /> (pg/L) (pgIL (pg/L /L (Ir /L) (pgIL) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 NO NO NO NO NO <br /> Di-is(,propyl Ether (DIPE) 050 NO NO NO NO NO <br />' Ethyl tert-Butyl Ether (ETBE) 050 NO ND NO NO NO <br /> tent-Amyl Methyl Ether(TAME) 050 NO NO NO NO NO <br />' tert-Butanol(TBA) 20 ND ND NO NO NO <br />' VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 NO NO NO NO NO <br /> Ethylene Dibromide (EDB) 050 NO NO NO NO NO <br />' Report Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate Recoveries <br /> t 1,2-Dichloroethane-d4 910% 111% 105% 104% 112% <br /> Toluene-d8 109% 102% 108% 110% 111% <br /> Instrument ID HP 5972MS <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 /> (pg1L)= micrograms per liter or parts pe illion(ppb) <br /> ANALYST OL APPROVED BY <br /> Clan J Cone Jam r!lrps <br /> oratory Director <br />