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' Aft 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 /> [Attn <br /> dvanced GeoEnviron mental, Inc Client Project ID Top Filling Sampled 03-04-03 <br />' f Northern California Reference Number 5521 Received 03-05-03 <br /> 37 Shaw Road Sample Description Water Extracted 03-07-03 <br /> tockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 03-07-03 <br /> Tim Cuellar Lab Numbers 5521-1 W,2W, 3W 4W 5W Reported 03-18-03 <br /> 1 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC/MS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE iD SAMPLE Ib SAMPLE!D SAMPLE ID <br /> LIMIT MW 1 MW 2 MW 3 MW 4 MW 5 <br />' 030403 030403 030403 030403 030403 <br /> ( /L (ug/L (ug/L (u/L u IL u /L <br /> FUEL OMENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 NO 1 2 120 NO NO <br /> Di-isopropyl Ether (DIPE) 060 ND ND ND ND NO <br /> Ethyl tert-Butyl Ether (ETRE) 050 ND NO ND NO NO <br /> tert-Amyl Methyl Ether(TAME) 0 50 ND ND ND ND ND <br /> *ert-Butanol(TBA) 20 NO NO ND NO ND <br /> VQLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1,2-DCA) 0 50 NO NO NO NO NO <br /> Ethylene Dibromide (EDB) 050 ND ND ND NO NO <br /> Report Limit Multiplication Factor 1 1 10" 1 1 <br /> t ' <br /> Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 746% 894% 694% 655% 654% <br /> Toluene-da 975% 970% 901% 988% 977% <br /> Instrument ID Varian Saturn 3 MS&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 /> (ug/L)= micrograms Rer liter or parts per billion(ppb) <br /> NALYST APPROVED BY <br /> .01��� <br /> Clan J Cone Jame Phillips <br /> Lab story Director <br />