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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone: (209)384-2930 <br />' <br /> Certificate No,2480 Fax: (209)384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID:Grewals Market Sampled: 03-22-02 <br /> of Northern California Reference Number:4521 Received: 03-26-02 <br /> ' 837 Shaw Road Sample Description:Water Extracted: 03-28-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method:EPA 5030/8260 Analyzed: 03-28-02 <br /> Attn:Tim Cuellar Lab Numbers:4521-1W,2W, 3W,4W Reported: 04-03-02 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 1 MW 2 MW 3 MW 4 <br /> ' 03-22-02 03-22-02 03-22-02 03-22-02 <br /> fua/L) u 11 u !L (ug/L u !L <br /> F1JEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 0.50 ND 11 ND ND <br /> Di-isopropyl Ether (DIPE) 0.50 ND ND NO ND <br /> ' Ethyl tert-Butyl Ether (ETRE) 0.50 ND NO ND ND <br /> tert-Amyl Methyl Ether(TAME) 0.50 ND ND ND ND <br /> • tert-Butanoi(TBA) 20 ND 48 NO NO <br /> ' V LATI E HALOCARSONS <br /> 1,2-Dichloroethane (1,2-DCA) 0.50 ND 1.6 ND NO <br /> ' Ethylene Dibromide (EDB) 0.50 ND ND ND ND <br /> Report Limit Multiplication Factor: 1 1 1 1 <br /> 1 <br /> ' Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 100% 105% 107% 104% <br /> Toluene-d8 108% 108% 108% 110% <br /> ' Instrument ID:Varian Saturn 3 <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 /> ' (pglL)= micrograms er liter or parts '!lion-(ppb) <br /> r, <br /> ANALYST: <br /> APPROVED BY: <br /> Clari one 1 P$ <br /> Laboratory Director <br /> k <br />