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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 GeoEnvironmental, Inc Client Project ID Sierra Lumber Sampled 12-29-03 <br />' of Northern California Reference Number 6479 Received 12-30-03 <br /> 837 Shaw Road Sample Description Water Extracted 01-05-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8260 Analyzed 01-05-04 <br /> Attn Tim Cuellar Lab Numbers 6479-1W,2W 3W,4W 5W Reported 01-06-04 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8280 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE I AMPLE <br /> D S 10 <br /> LIMIT MW 1 MW 2 MW 4A MW 48 MW 6 <br />' 12-29-03 12-29-03 12-29-03 12-29-03 12-29-03 <br /> (}i /L u lL) (ug/L (ug/L (ug/L u /L) <br /> FUEL OXYGENATES <br />' Methyi tert-Butyl Ether(MTBE) 050 ND ND ND ND ND <br /> Di-isopropyl Ether (DIPE) 050 ND ND ND ND ND <br /> Ethyl tert-Butyl Ether (ETRE) 050 ND ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 ND ND ND ND ND <br />'• tert-Butanol(TBA) 20 ND ND ND ND ND <br />' VOLATILE HALOCARBONS <br /> 1,2-Dfchloroethane (1 2-DCA) 050 ND ND ND NO ND <br /> Ethylene Dibromide (EDB) 050 ND ND ND ND ND <br /> Report Limit Mult,pl,catron Factor 1 1 1 1 1 <br /> Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 906% 949% 941% 973% 102% <br /> Toluene-d8 108% 138% 114% 119% 113% <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)= microgrs per liter or per illion(ppb) <br /> I N <br /> ANALYST APPROVED BY <br /> Clan J Cone James -Phillips <br /> I Laboratory Director <br /> i` <br />