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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 GeoEnwronmental, Inc Client Project ID Rainwater Car Wash Sampled 11-11-02 of Northern California Reference Number 5220 Received 11-12-02 <br /> 837 Shaw(toad Sample Description Water Extracted 11-15-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 11-15-02 <br /> Attn Tim Cuellar Lab Numbers 5220-11W, 12W, 13W, 14W, 15W Reported 11-26-02 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE [D SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 12D MW 12E ME 12F MW 10A MW 108 <br /> 111102 111102 111102 111102 111102 <br /> (u/L (ug/L u /L) u 1L <br /> ' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 NO NO NO 051 NO <br /> ' Di-isopropyl Ether (DIPE) 050 ND NO NO NO NO <br /> Ethyi tert-Butyl Ether (ETRE) 050 ND ND ND NO NO <br /> '• tert-Amyl Methyl Ether(TAME) 050 NO NO ND NO ND <br /> tert-Butanol(TBA) 20 NO NO NO ND NO <br /> ' MO-LATILE HALQCARBONS <br /> 1,2-Dichloroethane (1 2-DCA) 050 ND NO ND 062 44 <br /> ' Ethylene Dibromide (EDB) 050 ND NO ND NO ND <br /> ' Report Limit Multiplication Factor 1 1 1 1 2 <br /> ' Surrogate Recoveries <br /> ' 1 2-D,chloroethane-d4 101% 989% 883% 779% 667% <br /> Toluene-d8 96 1% 960% 101% 947% 987% <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 B;aboratory <br /> Clary J Cone Phillips <br /> Director f <br />