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' CASTLENAL _ <br /> A YTICAL 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:Grewats Market Sampled: 10-29-02 <br />' of Northern California Reference Number:5186 Received: 10-30-02 <br /> 837 Shaw Road Sample Description:Water Extracted: 10-30-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method: EPA 5030/8250 Analyzed: 10-30-02 <br /> Attn:Tim Cuellar Lab Numbers:5186-1W,2W,3W,4W Reported: 11-07-02 <br /> GASOLINE ADDITIVES & HALOCARBONS 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 /> 10-29-02 10-29-02 10-29-02 10-29-02 <br /> --— (pg/L) (uglL) (ug/L) (ug/L) (ug/L) <br /> STEX <br />' Benzene 0.50 NO ND NO ND <br /> Toluene 0-50 NO NO NO ND <br />' Ethylbenzene 0.50 NO 1.3 NO ND <br /> Total Xylenes 0.50 ND 6.9 ND NO <br /> FUEL OXYGENATES <br />' S Methyl tert-Butyl Ether(MTBE) 0.50 NO 13 NO ND <br /> Di-isopropyl Ether (DIPE) 0.50 NO ND NO ND <br /> ' Ethyl tert-Butyl Ether (ETSE) 0.50 ND ND NO ND <br /> tert-Amyl Methyl Ether(TAME) 0.50 ND ND NO ND <br /> tert-Butanol(TBA) 20 ND 35 NO NO <br /> ' VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 0-50 1.2 1.1 NO 2.3 <br /> ' Ethylene Dibromide (EDB) 0.50 NO ND NO NO <br /> ' Report Limit Multiplication Factor: 1 1 1 1 <br /> Surrogate Recoveries <br /> ' 1,2-Dichloroethane-d4 105% 112% 98.3% 110% <br /> Toluene-d8 98.8% 96.7% 93.3% 97.5% <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 /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> ANALYST: ' APPROVED BY: <br /> Clan J. Cone Jam C. P fillips <br /> L oratory Director <br /> J <br />