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CASTLE ANALYTICAL C L LABORATORY <br /> Envrronmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (209)384-2930 <br /> Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvrronmental Inc Client Protect 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 Prep/Analysis Method EPA 5030/8260 Analyzed 8-23-00 <br /> Attn Tim Cuellar Lab Numbers 3167-6W, 7W,8W,9W, 10W Reported 8-30-00 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC1MS <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 /> I 08-17-00 08-17-00 08-17-00 08-17-00 08-17-00 <br /> ( /L) /L) (N /L) /L /L) IL) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 21 066 34 ND NO <br /> Di-isopropyl Ether (DIPE) 050 NO NO ND NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND NO ND ND ND <br /> i <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND NO ND <br /> tert-Butanol(TBA) 50 ND NO ND ND ND <br /> Report Limit Multiplication Factor 40 1 2 1 1 <br /> I <br /> I <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 106% 108% 105% 967% 934% <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 /> (dig/L)= micrograms per liter or parts per billion(ppb) <br /> • ANALYST _ Q1(�� �iL4� APPROVED BY <br /> Clary J Cone —�'� e3 C Phillips <br /> Laboratory!arrector <br /> I <br />