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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 Geo Environmental, Inc Client Project ID Rainwater Car Wash Sampled 11-12-02 <br /> ' of Northern California Reference Number 5220 Received 11-13-02 <br /> 837 Shaw Road Sample Description Water Extracted 11-19-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 11-19-02 <br /> Attn Tim Cuellar Lab Numbers 5220-35W,36W Reported 11-26-02 <br /> 1 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID <br /> LIMIT MW 11E MW 11F <br /> 111202 111202 <br /> --- - - (hg/L) - (ug/l-) (ug/L) <br /> ' FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 ND NO <br /> ' Di-isopropyl Ether (DIPE) 050 ND NO <br /> Ethyl tent-Butyl Ether (ETRE) 050 ND NO <br /> ' tert-Amyl Methyl Ether(TAME) 050 NO NO <br /> tert-Butanoi(TBA) 20 ND ND <br /> ' VQLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1,2-DCA) 050 ND NO <br /> ' Ethylene Dibromide (EDB) 050 NO NO <br /> I <br /> ' Report Limit Multiplication Factor 1 1 <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 920% 105% <br /> Toluene-d8 103% 101% <br /> Instrument ID HP 5972 MS <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 APPROVED BY <br /> ' Clam J Cone igNbluPhillips <br /> aboratory Director <br /> i I I l <br />