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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 GeoEnvironmental, Inc Client Project ID Pacific Carwash Sampled 06-02-04 <br />' of Northern California Reference Number 7013 Received 06-03-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-08-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-08-04 <br /> Attn Tim Cuellar Lab Numbers 7013-11W 12W, 13W 14W 15W Reported 06-11-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 13B MW 13C MW 13D MW 14A MW 14B <br />' 060204 060204 060204 060204 060204 <br /> (N /L) (N /L) (u /L) ( /L) ( /L) (U /L) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 0 50 ND ND ND ND ND <br /> Di-isopropyl Ether (DIPE) 050 ND ND ND ND ND <br />' Ethyl tert-Butyl Ether (ETBE) 050 ND ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 0 50 ND ND ND NO ND <br /> lie tert-Butanol(TBA) 20 ND ND ND ND ND <br />' VOLATILE HALOCARBONS <br /> 1 2-Drchloroethane (1,2-DCA) 050 ND ND ND ND ND <br /> Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br /> IReport Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 930% 102% 107% 127% 909% <br /> Toluene-d8 107°/a 995% 936% 106% 96 1% <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 /> (Ng/L)= microgra er liter or pa r bi fron(ppb) <br /> 7 <br /> ANALYST APPROVED BY <br /> Clan J Cone Jam hrlirps <br /> L oratory Director <br />