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14 <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 GeoEnvironmentai, Inc Client Project ID Rainwater Car Wash Sampled 02-24-03 <br /> of Northern California Reference Number 5494 Received 02-25-03 <br /> 837 Shaw Road Sample Description Water Extracted 02-28-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 02-28-03 <br /> Attn Tim Cuellar Lab Numbers 5494-1W,2W, 3W Reported 03-05-03 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC1MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT Influent Effluent GAC-2 <br /> ' 02-24-03 02-24-03 02-24-03 <br /> _...,.� ___ _..... .... (ug1L) (uglL) (us/.L) (ug/L) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyi Ether(MTBE) 050 6700 NO 71 <br /> Di-isopropyl Ether (DIPE) 050 NO NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 NO NO NO <br /> tert-Amyl Methyl Ether(TAME) 050 150 NO ND <br /> ' tert-Butanol(TBA) 20 NO NO 96 <br /> VOLATILE HALOCARBgryS <br /> 1 2-Dichloroethane (1,2-DCA) 050 NO NO NO <br /> Ethylene Dibromide (EDB) 050 NO NO NO <br /> ' SOLVENTS <br /> Trichloroethene(TCE) 050 19 NO NO <br /> iTetrachloroethene(PCE) 050 160 NO NO <br /> Report Limit Multiplication Factor 20" 1 1 <br /> Report Limit Multiplication Factor for MTBE 500 <br /> ' *Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 131% 109% 120% <br /> Toluene-d8 100% 928% 981% <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 /> ' (pg/L.)= micrograms per liter or parts per billion(ppb) <br /> ANALYST APPROVED BY <br /> Clan J Cone els C Phillips <br /> Laboratory Director <br />