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©CENNI�G°d00 1�L C��ri1 CERTIFICATE OF ANALYSIS <br /> Ana/ytica/ 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: PE5964-02 Sample Type: Grab <br /> Sample Description: Tank West Project Name: 334 North American St. <br /> Date/Time Sampled: 9/16/99 1:48:00 PM Sample Matrix: Soil <br /> ANALYTICAL RESULT QA/QC REPORT <br /> Date LCS Spike MS Spike <br /> Test Parameter Method DLR Unit Result Analyzed Blank Colic. LCS% Colic. MS% MSD RSD'/o <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 /> Ethylhenzene EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 92.0% 10 95.0% 94.0% 0.3% <br /> Xylenes,Total EPA 8020 5 ug/Kg ND 20-Sep-99 ND 20 90.0% 20 89.0% 95.0% 1.6% <br /> Methyl-t-Butyl Ether(MtBE) EPA 8020 5 ug/Kg ND 20-Sep-99 ND 10 92.0%, 10 91.0% 87.0% H 1.1% <br /> mg/L=milligrams per Liter=ppm DLR-Detection Limu for the Purpose of Reporting. RSD-represent relative percent different(RPD)between duplicates spike of samples <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interfereneces may result in or Duplicate of Sample <br /> C=Composite G=Grab <br /> higher detection limits M -measuref the Percent recovery S/MSD o rciencies within the matrix <br /> rY a/r <br /> LCS-measure of lire percent recovery of the Laboratory Control Spike(LCS) <br /> RES � TTED, <br /> Jonathan Hao f.Le,Laboratory Director <br /> EPA-Environmental Protection Agency Method Page 1 of I <br /> SM-Standard Methodfor Examination"bEwC1@V l''dN6E8t. Suite A Stockton, CA 95204 Tel.: (209) 462-0892 Fax: (209) 462-7935 <br />