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1 <br /> 1 <br /> 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 11-15-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 11-15-02 <br /> Attn Tim Cuellar Lab Numbers 5220-26W,27W,28W,29W,30W Reported 11-26-02 <br /> 1 <br /> ' GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLED SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 813 MW 8C MW 8D MW 8E MW 8F <br /> 111202 111202 111202 111202 111202 <br /> (pg/L) (ug/L (ug/L)-( (ug/L u IL u /L <br /> ' FUEL OXYGENATES <br /> Methyl tent-Butyl Ether(MTBE) 050 21 42 ND ND NO <br /> ' Di-isopropyl Ether (DIPE) 050 ND ND ND ND NO <br /> Ethyl tert-Butyl Ether (ETSE) 050 NO ND ND ND NO <br /> t tert-Amyl Methyl Ether(TAME) 050 ND ND NO ND ND <br /> tert-Butanol(TBA) 20 ND NO ND ND NO <br /> VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1,2-DCA) 050 54 3 9 074 ND ND <br /> Ethylene Dibrom:de (EDB) 050 ND NO ND NO ND <br /> ' Report Limit Multiplication Factor 2* 2- 1 1 1 <br /> *Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 879% 878% 967% 105% 768% <br /> ' Toluene-d8 102% 101% 104% 953% 102% <br /> Instrument ID HP 5972 MS <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> ' Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (}ig/L)= micrograms per liter or parts per billion(ppb) <br /> r f <br /> ' ANALYST t APPROVED BY <br /> Clary J e Ja s hdtrps <br /> oratory Director <br />