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' CASTLE ANALYTICAL LABORATORY <br /> • Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone: (209)384-2930 <br /> y' Certificate#2079 Fax: (209)384-9507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID:Grewal's Market Sampled: 6-21-01 <br /> of Northern California Reference Number:3848 Received: 6-22-01 <br /> 837 Shaw Road Sample Description:Water Extracted: 6-25-01 <br /> Stockton,CA 95215 Sample Prep/Analysis Method: EPA 5030/8260 Analyzed: 6-25-01 <br /> Attn:Tim Cuellar Lab Numbers:3848-1W,2W,3W Reported: 7-5-01 <br /> 9, <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW1 MW2 MW3 <br /> 062101 062101 062101 <br /> IL) (pglL) <br /> EILEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 0.50 2.3 16 NO <br /> Di4sopropyl Ether (DIPE) 0.50 NO NO NO <br />' Ethyl tert-Butyl Ether (ETBE) 0.50 ND NO ND <br /> tert-Amy!Methyl Ether(TAME) 0.50 ND NO NO <br />' tert-Butanol(TBA) 20 NO 48 NO <br />' V4LATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-CCA) 0.50 6.2 3.2 NO <br />' Ethylene Dibromide (EDB) 0.50 NO NO NO <br /> Report Limit Multiplication Factor: 1 1 1 <br /> 1 Surrogate Recoveries <br /> 1,2-Dichioroethane-d4 83.0% 87.5% 82.3% <br /> Toluene-d8 85.9% 87.4% 84.5% <br /> Instrument ID: HP 5972MS <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 er billion(ppb) <br /> ANALYST: "`' APPROVED BY: <br /> Clari J. Gone Ja C. "fillips <br /> aborafory Director <br />