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• 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 GeoEnvironmental, Inc Client Protect ID Pacific Car Wash Sampled 11-25-02 <br /> of Northern California Reference Number 5269 Received 11-26-02 <br /> 837 Shaw Road Sample Description Water Extracted 12-02-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-02-02 <br />' Attn Tim Cuellar Lab Numbers 5269-1W,2W,3W 4W, 5W Reported 12-06-02 <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 1 MW 2 MW 3 MW 4 MW 5 <br /> 112502 112502 112502 112502 112502 <br /> (pglL) (q/L u /L) (u /L) (u IL) u /L) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 240 37 11 ND ND <br /> Di-isopropyl Ether (D1PE) 050 ND ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 NO NO ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 NO ND NO ND ND <br /> tert-Butanol(TSA) 20 ND ND NO ND ND <br /> VOLATILE HALOCARSONS <br /> 1 2-Dichloroethane (1,2-DCA) 050 140 NO ND ND NO <br /> IEthylene Dibromide (EDB) 050 ND NO NO ND NO j <br /> Report Limit Multiplication Factor 20` 50" 20" 1 1 <br /> 'Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> I 1 2-Dic1l11r0ethane-d4 104% 971% 101% 928% 898% <br /> Toluene-d8 124% 986% 914% 973% 980% <br /> i <br /> Instrument ID Varian Saturn 3 MS&HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> I <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (Ng1L)= micrograms pqr liter or part r billion (ppb) <br /> <::::ANALYST r APPROVED BY <br /> Clan J Cone Ja es Phillips <br /> aboratory Director <br />