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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (209)384-2930 <br />' Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project 0 Cal-Fuels Sampled 12-31-02 <br /> I of Northern California Reference Number 5359 Received 01-03-02 <br /> 837 Shaw Road Sample Description Water Extracted 01-06-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 01-06-02 <br /> Attn Tim Cuellar Lab Numbers 5359-11W 12W, 13W Reported 01-10-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE" ID SAMPLE ID <br /> LIMIT AW 1B AW 2A AW 2B <br /> 12-31-02 12-31-02 12-31-02 <br /> funll-) u /L u /L u2&) <br /> FUEL-OXYGENATES <br /> Methyl tert-Butyi Ether(MTBE) 050 NO NO NO <br /> Di-isopropyl Ether (DIPS) 050 NO NO NO <br /> Ethyl tart-Butyl Ether (ETBE) 050 NO NO NO <br /> Cert-Amyl Methyl Ether(TAME) 060 NO NO NO <br /> Itert-Butanol(TBA) 20 NO NO NO <br /> IVOL T M OC BON <br /> 1,2-Dichioroethane (1 2-DCA) 050 50 NO NO <br /> Ethylene Dibromide (EDS) 050 NO NO ND <br /> IReport Limit Multiplication Factor 10* 100* 50* <br /> i <br /> I <br /> *Report limit raised due to matrix interference <br /> C wrr.^.-^y.^f-n...... <br /> ..vrcrc5 <br /> 1,2-Dichloroethane-d4 101% 876% 978% <br /> Toluene-d8 109% 105% 112% <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 /> (pg1L)= micrograms per liter or parts per billion(ppb) <br /> ANALYST (yvu' APPROVED BY <br /> Cla a am s C Phillips <br /> Laboratory Director <br />