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I <br />' CASTLE ANALYTICAL LABORATORY <br /> • Environmental Testing Services 2383 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 4805-11W, 12W, 13W 14W, 15W Reported 07-08-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 11 MW 12 AW 1A AW 1B AW 2A <br /> 062002 062002 062002 062002 062002 <br /> (pg/L) a /L u /L (u /L) ((ug/L) (ugIL <br /> FUEL OXYGENATES <br /> IMethyl tent-Butyl Ether(MTBE) 050 ND NO ND NO ND <br /> D,-,soprapyl Ether (DIPE) 151 NO NO NO NO NO <br /> Ethyl tert-Butyl Ether (ETRE) 050 ND ND NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND ND <br /> r• tert-Butanol(TBA) 20 ND ND NO ND ND <br /> IVOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 ND ND NO ND NO <br />' Ethylene Dibromide (EDB) 050 ND NO NO NO ND <br /> IReport Limit Multiplication Factor 1 1 20" 10' 100' <br /> Report hmrt raised due to matrix interference <br /> 51 irrnnnafa Recoverrec <br /> 1,2-Dichloroethane-d4 104% 988% 71 1% 820% 746% <br /> Toluene-d8 101% 105% 112% 106% 103% <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 er billion(ppb) <br /> ANALYST APPROVED BY <br /> Clan J Cone James 9-'PtNilps <br /> La tory Director <br />