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i <br /> I 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 ID Top Filling Sampled 12-04-02 <br /> of Northern California Reference Number 5290 Received 12-05-02 <br /> 837 Shaw Road Sample Description Water Extracted 12-09-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-09-02 <br /> Attn Tim Cuellar Lab Numbers 5290-6W, 7W,8W,9W, 10W Reported 12-23-02 <br /> I <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> I <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> I LIMIT MW 6A MW 613 MW 6C MW 6D MW 6E <br /> 12/04/02 12/04/02 12/04/02 12/04/02 12/04/02 <br /> (ug/L) (ug1L) (uglL) (ug1L) _(ug/L) _ (ug/L) <br /> EIJELJO)SY�1114TES <br /> Methyl tert-Butyl Ether(MTBE) 050 55000 470 16 10 12 <br />' Di-isopropyl Ether (DIPE) 050 NO NO NO NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO NO ND NO NO <br />' tert-Amyl Methyl Ether(TAME) 050 NO NO NO NO ND <br /> tert-Butanol(TBA) 20 NO ND NO NO NO <br />' VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 NO NO 075 NO NO <br />' Ethylene Dibromide (EDB) 050 NO NO NO NO NO <br />' Report Limit Multiplication Factor 200' 10' 1 1 1 <br /> Report Limit Multiplication Factor for MTBE 2000 <br /> 1 <br />' 'Re ort limit due raised due to matnx interference <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 102% 901% 106% 918% 956% <br />' Toluene-d8 109% 137% 110% 984% 993% <br /> Instrument ID Varian Saturn 3 MS &HP 5972 MS <br /> Anaiytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br />' (Ng/L)= microgramsper liter or parts per billion(ppb) <br /> -1 <br />' ANALYST e APPROVED B / { M <br /> 41 <br /> Clan J Cone Yfjmihts C PhrRrps <br /> boratory Director <br />