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CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Cnve Atwater, CA 95301 phone (209) 384-2930 <br /> Certificate M-2480 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Cal Fuels Sampled 12-19-01 <br /> of Northern CaHomia Reference Number 4310 Received 12-20-01 <br /> 837 Shaw Road Sample Description Water Extracted 12-28-01 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/82610 Analyzed 12-28-01 <br /> Attn Tim Cuellar Lab Numbers 4310-1W, 2W,3W 4W, 5W Reported 1-4-02 <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 /> 121.901 121901 121901 121901 121901 <br /> FUEL OXYGE {p4/L) N91L) {ug/L) (uglL) (ug/L) (u9rL) <br />' _ NATES <br /> Methyl tert-Butyl Ether(MTBE) 050 NO NO 12 14 19 <br />' Di-isnpropyl Ether (DIPE) 050 NO ND NO ND 077 <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO ND NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 060 NO NO NO NO NO <br /> tert-Butanol(TBA) 20 ND NO NO ND NO <br />' VOLATILE HALOCARBONS <br /> 1 2-0chloroethane (1 2-DCA) 050 ND NO 13 ND 38 <br />' Ethyfene Dibromide (EDB) 050 NO NO NO NO NO <br />' Reoort Limit Multiplication Factor 1 1 20 20 1 <br /> Surrogate Recoveries <br /> 12-Dichloroethane-d4 115% 101% 100% 104% 107010 <br />' Toluene-d8 109% 120% 117% 120% 116% <br /> Instrument ID HP 5972MS <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation omit= Reporting Limit x Report Limit Multiplication Factor <br /> (PglL)= micrograms per liter or parts per billion (ppb) <br />' ANALYST APPROVED BY <br /> Clair J Cane7aboratory <br /> e Phillips <br /> Director <br />