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©r-HWOQO=r-C. rH CER TIFICA TE OF ANALYSIS <br /> Ana/yt/ca/ Laboratory <br /> Wednesday,September 29, 1999 <br /> TO: William Little <br /> Advanced GeoEnvironmental, <br /> 4005 N. Wilson Way <br /> Stockton, CA. 95205 <br /> Sample Information <br /> Sample ID: PE5964-01 Sample Type: Grab <br /> Sample Description: Tank East Project Name: 334 North American St. <br /> Date%Time Sampled. 9/16/99 1:40:00 PM Sample Matrix: Soil <br /> ANALYTICAL RESULT QA/QCRF_PORT <br /> W Date LCS Spike MS Spike <br /> Test Parameter Method DLR Unit Result Analyzed Blank Cone. LCV% Colic. MS% MSD RSD% <br /> TPH-Diesel EPA 8015M/DHS 1 mg/Kg ND 20-Sep-99 ND 50 96.0% 50 110.0% 120.0% 2.2% <br /> Benzene EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 98.0% 10 89.0% 92.0% 0.8% <br /> Toluene EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 97.0% 10 105.0% 100.0% 1.2% <br /> Ethylbenzene EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 92.0% 10 95.0% 94.6% 0.3% <br /> Xylenes,Total EPA 8020 5 ug/Kg ND 20-Sep-99 ND 20 90.0% 20 89.09/6 95.0% 1.6% <br /> Methyl-t-Butyl Ether(MIBE) EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 92.0% 10 91.0% 87.0%, 1.1% <br /> mglL=milligrams per Liter=ppm DLR-Detection Limit for the Purpose of Reporting. RSD-represent relative percent different(RPD)between duplicates spike of smnples <br /> uglL=microgram per Liter=ppb Exceptional sample matrices or interferences may result in or Duplicate of Sample <br /> C=composite C=Grab higher detection limits MS/MSD-nrensure of the percent,ecovery efficiencies wilhin the nuarir / <br /> LCS-measure of the percent recovery of the Laboratory Control Spike(LCS) <br /> '!E$r. <br /> ITTED, <br /> Jonathan Hao v Le,Laboratory Director <br /> _ ___... <br /> EPA-Environmental Protection Agency Method. Page/of <br /> SM-Standard Methodfor Examinationfj' '(E.W rts'ffLgfd ft E8t. Suite A Stockton, CA 95204 Tel.: (209) 462-0892 Fax: (209) 462-7935 <br />