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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 No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Rainwater Car Wash Sampled 01-24-03 <br /> ' of Northern California Reference Number 5420 Received 01-28-03 <br /> 837 Shaw Road Sample Description Water Extracted 02-03-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 02-03-03 <br /> Attn Tim Cuellar Lab Numbers 5420-1W,2W, 3W Reported 02-11-03 <br /> Y <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC/MS <br /> ' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT Influent GAC-2 Effluent <br /> 01-24-03 01-24-03 01-24-03 <br /> (pg/L) (ug/L (u /L) u !L) <br /> FUEL OXYGENATES <br /> ' Methyl tert-Butyl Ether(MTBE) 050 1700 60 ND <br /> Di-isopropyl Ether (DIPS) 050 ND ND ND <br /> ' Ethyl tert-Butyl Ether (ETRE) 050 ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 30 ND ND <br /> ' tert-Butanol(TBA) 20 120 ND ND <br /> VOLATILE HALOCARBONS <br /> 1,2-Dichloroethane (1,2-DCA) 050 ND ND ND <br /> ' Ethylene Dibromide (EDB) 150 NO ND ND <br /> SOLVENTS <br /> ' TrichOroothene(TCE) 050 26 ND ND <br /> Tetrachloroethene(PCE) 050 70 ND ND <br /> ' Report Limit Multiplication Factor 5* 1 1 <br /> Report Limit Multiplication Factor for MTBE 50 <br /> ' Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 998% 980% 109% <br /> ' Toluene-d8 108% 919% 968% <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 /> ' (pg/L)= micrograms,per liter or parts per billion(ppb) <br /> � 7 <br /> ' ANALYST APPROVED BY <br /> Clary Cone m s C Phdllps <br /> laboratory Director <br />