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' CASTLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2934 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Rainwater Car Wash Sampled 06-22-04 <br /> ' of Northern California Reference Number 7092 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 07-01-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 07-01-04 <br /> Attn Tim Cuellar Lab Numbers 7092-16W 17W, 18W 19W 20W Reported 07-07-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 11 D MW 11 E MW 11F MW 13A MW 13B <br /> 062204 062204 062204 062204 062204 <br /> (NgIL} (pg/L) (fag/L) (Ng/L) <br /> FUEL OXYGENATES <br /> Methyl tent-Butyl Ether(MTBE) 050 11 ND NO NO 0 57 <br /> ' Di-isopropyl Ether (DiPE) 050 ND NO NO ND ND <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO NO NO ND ND <br /> ' tert-Amyl Methyl Ether(TAME) 050 NO NO ND ND ND <br /> tert-Butanol(TBA) 20 NO NO ND ND ND <br /> ' VOLATILE HALOCARBONS <br /> 1 2 Dichloroethane (1 2-DCA) 0 50 ND NO NO ND ND <br /> ' Ethylene Dibromide (EDB) 050 NO NO NO ND NO <br /> SOLVENTS <br /> ' Trichloroethene(TCE) 0 50 41 0 57 NO 052 24 <br /> Tetrachloroethene(PCE) 050 260 54 48 51 46 <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Report Limit Multiplication Factor for PCE 10 <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 10111/0 840% 697% 794% 798% <br /> ' Toluene-d8 103% 934% 796% 905% 962% <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 /> t (y)g/[-)= micrograms per liter or p per billion(ppb) <br /> 0 t <br /> ' ANALYST LX APPROVED BY <br /> Clan J e Ja e Phtllaps <br /> aboratory Director <br /> i <br />