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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 Pac Car Wash Sampled See Below <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 6371-1W,2W 3W,4W, 5W Reported 12-18-03 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC1MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br />' LIMIT MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 112803 112803 112803 112603 112603 <br /> (pg/L) Jug/L) (u IL) (ug/L a /L) (u IL) <br />' <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 050 200 57 20 65 ND <br /> D,-isopropyl Ether (DIPE) 050 NO NO ND NO ND <br />' Ethyl tert-Butyl Ether (ETRE) 050 ND ND ND ND NO <br />' • tert-Amyl Methyl Ether(TAME) 050 NO ND ND ND NO <br /> tert-Butanol(TBA) 20 ND NO ND ND NO <br />' VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 140 11 NO ND ND <br />' Ethylene Dibromide (EDB) 050 NO ND ND ND NO <br /> I Report Limit Multiplication Factor 20* 20" 10' 1 1 <br /> Date Sampled 11-28-03 11-28-03 11-28-03 11-26-03 11-26-03 <br /> Report limit raised due to matnx interference <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 104% 963% 987% 944% 999% <br /> Toluene-d8 112% 115% 107% 109% 106% <br /> Instrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quanhtat'on Lmmit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (Ng/L)= microgr ger Inter or parts billion(ppb) <br /> ANALYST APPROVED BY <br /> Clan J Cone James r, Phillips <br /> oratory Director <br />