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Precision Enviro-Tech Date: 10/16/97 <br /> Analytical Laboratory <br /> 2040 E.Hang Way,Suite B Stockton, CA.95205 <br /> Phone:(209)462-0892 Fax:(209)462-7935 <br /> Certificate of Analysis <br /> Timothy J. Cuellar <br /> Advanced GeoEnviron mental, Inc. Customer ID: ADGEO <br /> 4005 N. Wilson Way <br /> Stockton CA. 95205 <br /> Sample Information <br /> Lab Sample ID: PEI 324-01 Sample Matrix: Soils <br /> Sample Description: 9 ' 4" Deep Tank#1 Sampler Name: Jonathan Le <br /> Date Sampled: 10/1/97 10:35:00 AM Project Name: City of STK parking I <br /> Digestion Method: (Pb) EPA 3050 <br /> Analytical Result <br /> Parameter Method RLR Units Result <br /> Lead Pb EPA 6020 1.0 mg/kg 21 .0 <br /> Meth I-t-But I Ether MtBE EPA 8020 0.050 mq/Kq ND <br /> Xylenes, Total EPA 8020 0.005 mq/Kq ND <br /> Eth (benzene EPA 8020 0.005 m K ND <br /> Toluene EPA 8020 0.005 mg/Kq mg/KND <br /> Benzene EPA 8020 0.005 mg/Kq mg/KND <br /> PH-Diesel PA 8015M/DH 2 mg/kq mg/kND <br /> PH-Gasoline PA 8015M/DH 1 mg/Kg mg/KgND <br /> Respec fully submi ed, <br /> UL <br /> Labor tory Director <br /> Hao V. Le, B.5 <br /> ND-None Detected DLR-Detection Limit for the Purpose of Reporting Conversions: <br /> mg/L- milligrams/Liter m ppm Exceptional sample matrices or interferences 1 ppm=1000 ppb <br /> mg/kg-milligrams/kilogram— ppm may result in higher detection limits 1 ppb=0.001 ppm <br /> ug/kg- micrograms/kilogram- ppb DLR=DLR X Dilution Factor <br /> <DLR=Trace of Analyte <br />