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i <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GPOEnvironmental Inc Client Project ID Cal Fuels Sampled 10-07-04 <br />' of Northern California Reference Number 7440 Received 100 04 <br /> 837 Shaw Road Sample Description Water Extracted 10 2 04 <br /> Stockton CA 95215 Sample Prep/Analysis Method LPA 5030/8260 Analyzed i -13-04 <br /> Attn Tim Cuellar Lab Numbers 7440-1W,2Vt1 3W 4W 5W Reported 10-20-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br />' ANALYTE RLPORTING SAMPLE ID SAMPLE= 1D SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 1 MW 2 MW 3 MW 4 MW 5 <br />' 100704 100704 100704 100704 100704 <br /> ( IL) ( /L) (p !L) IL) IL) ( IL) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 NO NO NO ND NO <br /> Di-isopropyl Ether (DIPE) 050 ND ND NO ND NO <br /> iEthyl tert-Butyl Ether (ETRE) 050 NO NO NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND NO ND ND <br /> tert-Butanol(TBA) 20 NO ND ND ND ND <br /> VOLATILE HALOCARBONS <br /> 1 2-Dichlorcethane (1 2-DCA) 050 NO 71 096 059 NO <br />' Ethylene Dibromide (EDB) 050 NO ND ND ND NO <br /> Report Limit Multiplication Factor 1 10' 1 1 1 <br /> Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 857% 960% 912% 939% 931% <br /> Toluene-d8 877% 956% 977% 952% 961% <br /> instrument ID HIP 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 /> (pG1L)= micrograms per liter or parts per billion(ppb) <br /> r <br /> APPROVED BY APPROVED BY <br />' (21-A- <br /> Clan J Cone Jam C hrpips <br /> Laboratory Manager La oratory Director <br />