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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (209)384-2930 <br /> Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 8-17-00 <br /> of Northern California Reference Number 3167 Received 8-18-00 <br /> 4005 North Wilson Way Sample Description Water Extracted 8-23-00 <br /> Stockton CA 95205 Sample PreplAnaiysis Method EPA 5030/8260 Analyzed 8-23-00 <br /> Attn Tim Cuellar Lab Numbers 3167-1W, 2W,3W,4W, 5W Reported 8-30-00 <br /> I <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> -r(.- -Tr'- . <br /> ANALYTE REPORTING SAMPLE 1D SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT --ftW7"r—M 0I& 1 MW-3 MW-4 MW-5 <br /> 08-17-00 08-17-00 08-17-00 08-17-00 08-17-00 <br /> (pq/L) /L ( /L) IL IL /L) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 ND 260 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) 050 ND ND ND ND ND <br /> Itert-Butanoi(TBA) 50 ND ND ND ND ND <br /> Report Limit Multiplication Factor 100' 100 1 1 1 <br /> •Increased Reporting Limit due to matrix interferences <br /> Surrogate Recoveries <br /> I1 2-Dichloroethane-d4 110% 976% 836% 104% 107% <br /> Instrument ID HP 5972MS <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)= micrograms per liter or parts per billion(ppb) <br /> ANALYST_ ,l _„ APPROVED BY <br /> (;�. z<2-- <br /> Clary J Cone Jam C r!lrps <br /> Lgboratory Director <br /> I <br />