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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br /> ' Certificate 42480 Fax (209)384-1507 <br /> Advanced GeoEnvironmenta4, Inc Client Project ID Rainwater Car Wash Sampled 06-23-04 <br /> t of Northern California Reference Number 7093 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-27-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-27-04 <br /> Attn Tim Cuellar Lab Numbers 7093-21W 22W Reported 0707-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 9D MW 9E <br /> 062304 062304 <br /> ( /L) (u /L) IL) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 ND ND <br /> Di-isopropyl Ether (DUPE) 0 50 ND ND <br /> ' Ethyl tent-Butyl Ether (ETBE) 050 ND ND <br /> tert-Amyl Methyl Ether(TAME) 0 50 ND ND <br />' '• tert-Butanol(TBA) 20 ND ND <br /> i <br /> ' VOLATILEHALOCARBONS <br /> 1,2-Dichloroethane (12-DCA) 050 NO ND <br /> ' Ethylene Dibromide (EDB) 0 50 ND ND <br /> SOLVENTS <br /> ' Trichloraethene(TCE) 050 ND ND <br /> Tetrachloroethene(PCE) 050 51 91 <br /> ' Report Lima Muftiplication Factor 1 1 <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 922% 994% <br /> Toluene-d8 104% 104% <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 /> ' (Ijg/L) = micrograms per ter or p pe billion(ppb) <br /> ANALYST APPROVED BY <br /> ' Clan J Gonerbcoratory <br /> C Phrllrps <br /> Director <br />