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. CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate#2480 Fax, (209)384-1507 <br /> Advanced GeoEnvi ron mental, Inc, Client Project ID:Grewals Market Sampled: 12-18-01 <br /> ' of Northern California Reference Number:4300 Received: 12-19-01 <br /> 837 Shaw Road Sample Description:Water Extracted: 12-26-01 <br /> Stockton, CA 95215 Sample Prep/Analysis Method: EPA 5030/8260 Analyzed: 12-26-01 <br /> Attn:Tim Cuellar Lab Numbers:4300-1W,2W, 3W Reported: 01-02-02 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 1 MW 2 MW 3 <br /> 121801 121601 121801 <br /> (1�9iL) _ (ug/L) (uglL)„ .. ----�ug/L)._ <br /> ' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 0.50 0.61 3.3 NO <br /> Di-isopropyl Ether (DIPE) 0.50 NO ND ND <br /> Ethyl tert-Butyl Ether (ETBE) 0.50 NO ND NO <br /> tert-Amyl Methyl Ether(TAME) Y 0.50 ND NO NO <br /> tert-Butanol(TBA) 20 ND NO NO <br />' VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 0.50 2.0 0.82 NO <br /> Ethylene Dibromide (EDB) 0.50 ND NO NO <br /> Report Limit Multiplication Factor: 1 1 1 <br /> 1 Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 105% 95.3% 99.0% <br /> ' Toluene-d8 102% 111% 110% <br /> Instrument ID: HP 5972MS <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> ' Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (pgiL)= micrograms per I' or parts per billi pb) <br /> ANALYST: APPROVED BY: <br /> '4-�Z <br /> Clan J. Cone m . Phillips <br /> Laboratory Director <br /> 9.1 <br />