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A N A L Y T I C A L t\T�•/@ <br /> LABGRATORIE& <br /> Certificate of Analysis <br /> Don Light Preparation Date 10/03/98 <br /> Del-Tech Geotechnical Services - Analysis Date 10/03/98 . <br /> 10624 Olive Avenue Report Issue Date 10/15/98 <br /> Oakdale, CA 95361 <br /> Sample Date 09/23/98 <br /> Submission Number 9809000817 Sample Time 00:00 <br /> Lab Number 79698 Sample Type SOLID <br /> Pro*ect Number 3012 E.Waterloo ` <br /> Proiject Desc. Advanced Auto <br /> Sample Description _ TK-4-8' <br /> Oxyeg nates 1y GC/MS (8260M) <br /> Analyte Result Units PQL Dil DLR <br /> ND ug/Kg 20 1 20 <br /> Methyl-t-Butyl Ether ND µg/Kg 20 1 20 <br /> Di-isopropyl Ether ND µg/Kg 20 1 20 <br /> Ethyl t-Butyl Ether ND. µg/Kg 20 1 20 <br /> t-Amyl Methyl Ether ND µg/Kg 200 1 200 <br /> tert-Butyl Alcohol <br /> Conversions: <br /> ND None Detected PQL Practical Quantitation Limit 1 ppm = 1000 ppb <br /> mg/L Milligrams/Liter — ppm Di j Dilution Factor 1 ppb = 0.001 ppm <br /> µg/L Micrograms/Liter = ppb DLR Reportable Detection Limit <br /> mg/kg Milligrams/Kilogram = ppm derived by(PQL x Dil) <br /> µg/kg Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street • Fresno, CA 93706-1623 • Phone 209-497-2888, In CA 800-877-8310 .Fax 209-485-6935 <br />