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• 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 GeoEnviron mental, Inc Client Project ID Sierra Lumber Sampled 06-t7-03 <br />' of Northern California Reference Number 5839 Received 06-19-03 <br /> 837 Shaw Road Sample Description Water Extracted 06-26-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-26-03 <br /> Attn Tem Cuellar Lab Numbers 5839-1W,2W, 3W 4W, 5W Reported 06-30-03 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GUMS <br />' ANALYTE REPORTINGA <br /> S MPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW 1 MW 2 MW-4A MW-413 MW-6 <br />' 06-17-03 06-17-03 06-17-03 06-17-03 06-17-03 <br /> hin/1 (u IL (ug/L (u /L) ((ug/L u /L <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether{MTBE) 050 NO ND NO 27 NO <br /> Di-isopropyl Ether (DIPS) 050 12 NO ND NO NO <br />' Ethyl tert-Butyl Ether (ETRE) 050 NO NO NO NO NO <br /> tent-Amyl Methyl Ether(TAME) 050 NO NO ND ND ND <br />' tert-Butanol(TBA) 20 NO NO NO NO NO <br /> VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 050 NO NO NO NO NO <br /> Ethylene Dibromide (EDB) 050 NO NO NO NO NO <br /> Report Limit Multiplication Factor 1 10* 1 1 1 <br /> Report limit raised due to matrix interference <br /> Surrogate Recoveries <br /> 1,2-Dichloroethane-d4 109% 104% 118% 113% 120% <br /> Toluene-d8 969% 984% 101% 105% 999% <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 /> (ug/L)= micrograms per liter or parts per billion (ppb) <br /> ANALYST !L <br /> APPROVED BY <br /> Clary J Cone Ja es C Phillips <br /> Iaboratory Director <br /> I <br />