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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 Cal Fuels Sampled 06-20-02 <br /> of Northern California Reference Number 4805 Received 06-21-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-27-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-27-02 <br /> Attn Tim Cuellar Lab Numbers 4805-1W 2W,3W,4W,5W Reported 07-08-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 1 MW 2 MW 3 MW 4 MW 5 <br />' 062002 062002 062002 062002 062002 <br /> (pg/L) (ug/L (ug/L u (ug/L u /L) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 NO ND NO 11 079 <br /> Di-isopropyl Ether (DIPE) 0 50 NO NO NO NO NO <br />' Ethyl tert-Butyl Ether (ETRE) 050 NO NO NO NO NO <br /> tert-Amyl Methyl Ether(TAME) 050 NO NO NO NO NO <br />' tert-Butanol(TBA) 20 NO NO NO NO NO <br />' VOLATILE HALOCAR11301915 <br /> 1,2-Dichloroethane (1,2-DCA) 050 NO NO NO NO 1 5 <br />' Ethylene Dibromide (EDB) 050 NO NO NO NO ND <br /> Report Limit Multiplication Factor 1 1 20' 10' 1 <br /> *Report limit raised due to matrix interference <br /> 1,2-Dichloroethane-d4 102% 101% 828% 936% 983% <br />' Toluene-d8 106% 123% 901% 91 0% 101% <br /> Instrument ID Varian Saturn 3&HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (pg/L)= micrograms per liter or parts per billion(ppb) <br />' <br /> ANALYST-6APPROVED BY 1LIO <br /> (7"O-�' <br /> Clan J Cone Jamjwn W1111ps <br /> ` L oratory Director <br />