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1 <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> i <br /> Advanced GeoEnvironmental, Inc Client Project 1D 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 06-26-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-26-04 <br /> Attn Tim Cuellar Lab Numbers 7092-21W,22VV,23W,24W Reported 07-07 04 <br /> tGASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE €D SAMPLE ID SAMPLE ID SAMPLE ID <br /> ' LIMIT MW 13C MW 13D MW 13E MW 13F <br /> 062204 062204 062204 062204 <br /> (i (Vg1L) (pg/L) (ug/i -- <br /> FUEL OXYGENATES <br /> ' Methyl tert-Butyl Ether(MTBE) 050 ND ND ND ND <br /> I <br /> ' Di-isopropyl Ether (DIPE) 050 NO NO ND ND <br /> I <br /> Ethyl tert-Butyl Ether (FTSE) 0 50 ND NO NO ND <br /> ' Cert-Aroyl Methyi Ether(TAME) 0 50 ND NO NO ND <br /> tert-Butanol(Ti 20 NO NO ND ND <br /> ' VOLATILE HALOCARBONS <br /> 12-Dichloroethane (1 2-DCA) 0 50 NO NO ND NO <br /> ' Ethylene Dibromide (EDB) 0 50 NO ND ND NO <br /> SOLVENTS <br /> ' Trichloroethene(TCE) 050 36 16 NO ICED <br /> Tetrachloroethene(PCE) 050 110 40 21 1 3 <br /> Report Limit Multiplication Factor 1 1 1 1 <br /> Report Limit Multiplication Factor for PCE 10 <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 103% 102% 930% 900% <br /> ' Toluene-d8 104% 107% 103% 106% <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 /> micrograms per liter o a per billion(ppb) <br /> C/4/'A� ao"),:7-r)- <br /> ANALYST APPROVED BY <br /> ' Clan J Cone J ares C Phillips <br /> laboratory Director <br /> 1 <br />