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; <br /> t <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Light <br /> t Del-Tech Geotechnical Services Preparation Date 02/23/99 <br /> 10624 Olive Avenue Analysis Date 02/23/99 <br /> Oakdale, CA 95361 Report Issue Date 03/30/99 <br /> Sample Date 02/11/99 <br /> ` Submission Number 9902000483 Sample Time 14:02 <br /> Lab Number 98879 Sample Type LIQUID <br /> Project Number Disco <br /> Protect Desc. : Ground Water Monitoring <br /> Sample Description MW-2 <br /> Oxygenates by GUMS (8260M� <br /> Analyte Result Units PQL Dil DLR <br /> f Methyl-t-Butyl Ether ND ug/L. 5.0 1 5 <br /> Di-isopropyl Ether ND uWL 5.0 1 5 <br /> Ethyl t-Butyl Ether ND ui/L 5.0 1 5 <br /> r t-Amyl Methyl Ether ND pg/L 5.0 • 1 5 <br /> tert-Butyl Alcohol ND pg/L 50 1 50 <br /> j <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter — ppm Dil Dilution Factor 1 ppm = 1000 ppb. <br /> t µg/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0A01 ppm <br /> mg/kg Milligrams/Kilogram — ppm derived by(PQL x Dil) <br /> )Ag/kg Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> i <br /> i 1414 Stanislaus Street • Fresno, CA 93706-1623 Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />