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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 6-26-01 <br /> of Northern California Reference Number 3867 Received 6-28-01 <br />' 837 Shaw Road Sample Description Water Extracted 7-2-01 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 7-2-01 <br /> Attn Tim Cuellar Lab Numbers 3867-11W Reported 7-12-01 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> iANALYTE REPORTING SAMPLE ID <br /> LIMIT MW10B <br />' 062601 <br /> (u IL) IL <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 082 <br /> Di-isopropyl Ether (DIPE) 050 ND <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND <br /> • tent-Butanol(TBA) 20 ND <br /> Report Limit Multiplication Factor 1 <br /> Surrogate Recoveries <br /> 12-Dichloroethane-d4107/o 0 <br /> Toluene-d8 100% <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 /> (ug/L)= micrograms per liter or parts per billion(ppb) <br /> C&zl <br /> • <br /> ANALYST -- <br /> APPROVED BY <br /> Clan J Cone me C Phr lips <br /> Laboratory Director <br />