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06/29/2006 15*52 209304150, CASTLE ANALYTICAL PAGE 04 <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 05301 Phone: (209)384-2930 <br /> CartMeats No.2480 Fox; (209)384-1507 <br /> Foothill Engineering Client Project ID:011varez Property Sampled: 08-16-06 <br /> 8442 Story Ridge Way Reference Number:9230 Received: 05-20-06 <br /> Antelope,CA 66843 Sample Description:Water Extracted-' 06-21.06 <br /> Attn:Mike Vlach Sample Prep/Analysis Method:EPA 503018260 Analyzed; 06-21-06 <br /> Lab Numbers:9230-1 W.2W,3W,4W,5W Reported: 06.29-06 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 OCIMS <br /> ANALYTE REPORTING SAMPLE ID $AMPLE 10 SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-i MW-IR MW-2 MW-2R MW-3 <br /> FUEL OXYgENATE <br /> Methyl tart-Butyl Ether(MTBE) 0.50 300 36 36 4.0 NO <br /> Di-isopropyl Ether (DIPS} 0100 NO NO NO NO NO <br /> Ethyl tart-Butyl Ether (FT13C) 0.50 NO NO NO NO NO <br /> tart-Amyl Methyl Ether(TAME) 0,50 NO NO NO NO ND <br /> tart-Butanol(TBA) 20 ND NO NO NO NO <br /> VOLATILE HAL"10 ROONS&ARON&TICq <br /> 1,2-(Olohloroethane (1,2-OCA) 0.50 170 NO 57 4,9 1,9 <br /> Ethylene Dibromide (EDB) 0.50 60 NO NO NO NO <br /> Report Limit Multiplication Factor., 20* 50* 20* <br /> Report I/m/f raised due to matrix Interference <br /> Surrogate Recovarlas <br /> 1,2-Oichloroethen"4 105% 10311/o 102% 111% 116% <br /> Toluene-d6 96.6% 113% 91.9% 106% 99.5% <br /> Analytes reported as NO were not detected or below the Practical Quantitallon Limit <br /> Practical Ouantitation Limit m Reporting Limit x Report Limit MuttlPlICation Factor <br /> (pg/L). micrograms per liter or parts per billion(ppb) <br /> APPROVED BY: <br /> James C.PhilfipslLebo tory i <br /> star or <br /> ClarfJ. ConelLaborato Managar <br /> goo in I)ITIV11DVIA i:69067L916 XVJ VS:90 90OZ/OV/90 <br />