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• CASTL <br /> E 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 GeoEnvironmental, Inc Client Project ID Pao Car Wash Sampled 11-28-03 <br /> of Northern California Reference Number 6371 Received 12-02-03 <br /> 837 Shaw Road Sample Description Water Extracted 12-06-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 12-06-03 <br /> Attn Tim Cuellar Lab Numbers 6371-16W, 17W 18W, 19W,20W Reported 12-18-03 <br /> IGASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8264 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 13C MW 13D MW 15A MW 158 MW 15C <br /> 112803 112803 112803 112803 112803 <br /> N IL) (ug/L (ug/L u IL) (u/L (u IL <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 ND ND 93 ND NO <br />' D,-isopropyl Ether (RIPE) 050 ND ND ND ND ND <br /> Ethyl tent-Butyl Ether (ETBE) 050 ND ND ND NO ND <br /> I . tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND ND <br /> tart-Butanol(TBA) 20 ND 170 NO ND NO <br /> IVOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1,2-DCA) 050 ND 1 7 1 9 NO ND <br /> Ethylene Dibromide (EDB) 050 NO ND ND ND NO <br /> IReport Limit Multiplication Factor 1 1 1 1 1 <br /> i <br /> Surrogate Recoveries <br /> I 1,2-Dichloroethane-d4 109% 115% 107% 108% 106% <br /> Toluene-d8 106% 114% 103% 104% 967% <br /> tnstrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quariblabon Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (ug/L)= micro gra s per liter or pa bilho (ppb) <br /> ANALYST APPROVED BY <br /> Clan ConeU, Jame if/ <br /> La ratory Director <br />