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' CASTLE ANALYTICAL LABORATORY <br /> . O ORY <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 Pac Car Wash Sampled 11-26-03 <br />' of Northern California Reference Number 6371 Received 12-02-03 <br /> 837 Shaw Road Sample Description Water Extracted 12-06-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-06-03 <br /> Attn Tim Cuellar Lab Numbers 6371-6W, 7W, 8W, 9W, 10W Reported 12-18-03 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GCIMS <br /> 1 <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br />' LIMIT MW 6 MW 7 MW 8 MW 9 MW 10A <br /> 112603 112603 112503 112603 112603 <br /> q /L) (u /L) (u /L) u 1L (u2/L) (u /L) <br />' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 400 24 ND 350 11 <br /> Di-isopropyl Ether (DIPS) 050 NO ND ND ND ND <br />' Ethyl tert-Butyl Ether (ETBE) 050 NO ND ND ND ND <br />' • tert-Amyl Methyl Ether(TAME) 050 NO ND NO ND NO <br /> tert-Butanol(TBA) 20 ND ND ND ND NO <br />' VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1,2-DCA) 050 ND ND NO ND ND <br />' Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br /> IReport Limit Multiplication Factor 20' 1 1 1W 1 <br /> *Reoortina limit increased raised due to matrix interference <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 103% 989% 109% 1066% 110% <br /> Toluene-d8 111% 101% 985% 106% 103% <br /> Instrument ID HP 5972 MS <br /> Analytes reported as NO were not detected or below the Practical QuantKatwn Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (Ng/L)= micrograms per Mer or parts per billion(ppb) <br /> ANALYST APPROVED BY <br /> Clary J Cones <br /> hdlrps <br /> boratory Director <br />