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1 <br /> CASTLE ANALYTICAL LABORATORY Phone (209) 384-2930 <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Fax (209) 3B4-1507 <br /> Certificate #2079 <br />' Sampled 2 25-98 <br /> rFAdvanced GeoEnvlronmental, Inc Chem project ID Nomellirn Received 2 27-98 <br /> Northern California Reference Number 1474 Extracted 3 2-9803 West March Lane Su1te A Sample Description Water Anal zed 3 2-98ckton, CA 95207 Sample PreplAnalysis Method EPA 5030!8015, 8020 Reported 3-6 98n Tim Cuellar Lab Numbers 1474 1W, 2W, 3W, 4W, 5W <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' PORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> ANALYTE RE MW-11 MW-21 MW-31 MW 4! MW-51 <br /> 2-25 98 2 25 98 2 25 98 2-25-98 2-25-98 <br />' (ug/L) (ug/L) (ug1L) (ug/L) (ug1L) (ug1L) <br />' MTBE 050 <br /> NO 140 NO NO 52 <br /> BENZENE 050 350 <br /> 6900 19000 3400 NO <br /> TOLUENE 050 120 <br /> 120 12000 ND NO <br /> ETHYL BENZENE 050 81 <br /> 310 2400 410 NO <br /> TOTAL XYLENES 050 440 <br /> 200 8000 200 NO <br /> GASOLINE RANGEND <br /> HYDROCARBONS 50 7500 14000 91000 8800 <br /> 20 200 500 <br /> 100 I <br /> Report Limit Multiplication Factor <br /> FID 107%1 PID 104% FID 9S 7%1 PID 93 9% FID 102%1 PID 97 0% FID 104%1 PID 97 4% FID 509%1 FIE)100% <br /> Surrogate % Recovery <br /> instrument ID <br /> VAR-GC1 VAR GC1 VAR GC1 VAR-GC1 VAR GCI <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 /> ANALYST 2 L APPROVED BY <br /> am s Phi lips <br /> Clary J Cone Environmental Lab Director <br />