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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 ID: Grewall's Market Sampled: 09-25-03 <br /> ' of Northern California Reference Number:6151 Received: 09-26-03 <br /> 837 Shaw Road Sample Description:Water Extracted: 10-02-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method: EPA 503018260 Analyzed: 10-02-03 <br /> Attn:Tim Cuellar Lab Numbers:6151-1W, 2W, 3W,4W Reported: 10-14-03 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GUMS <br /> ' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 1 MW 2 MW 3 MW 4 <br /> ' 092503 092503 092503 092503 <br /> (N /L) (u /L) u /L) (u IL) (u IL) <br /> FUEL OXYGENATES <br /> tMethyl tert-Butyl tether(MTBE) 0.50 ND 16 NO NO <br /> Di-isopropyl Ether (DIPE) 0.50 ND ND NO ND <br /> ' Ethyl ter-Butyl Ether (ETBE) 0.50 ND NO NO ND <br /> tert-Amyl Methyl Ether(TAME) 0.50 NO ND ND NO <br /> ' tert-Butanol(TBA) 20 NO ND NO NO <br /> ' VOLATILE HALOCARSONS <br /> 1.2-Dichloroethane (1,2-DCA) 0.50 1.5 0.85 ND 1.3 <br /> ' Ethylene Dibromide (EDB) 0.50 ND NO ND ND <br /> ' Report Limit Multiplication Factor: 1 1 1 1 <br /> ' Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 99.7% 91.4% 92.6% 107% <br /> Toluene-d8 98.8% 90.0% 101% 91.3% _--- - <br /> Instrument ID: 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 /> WWI-)= microgr2, per liter orparts per billion(ppb) <br /> ' ANALYST: APPROVED BY: f <br /> Clari J. Corte / J ! es C. Phillips <br /> `! aboratory Director <br />