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i <br /> A N A L Y T I C A L <br /> rRON LABORATORIES <br /> Certificate of Analysis <br /> Don Light <br /> Del-Tech Geotechnical Services Preparation Date 07/23/99 <br /> 10624 Olive Avenue Analysis Date 07/23/99 <br /> Oakdale, CA 95361 Report Issue Date 08/05/99 <br /> Sample Date 07/15/99 <br /> Submission Number 9907000522 Sample Time 13:41 <br /> Lab Number 121321 Sample Type LIQUID <br /> Project Number Del Monte Foods <br /> j Project Desc. — Disco <br /> Sample Description MW-10 <br /> Oxygenates by GUMS {8260M� <br /> i <br /> Analyte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether ND ug/L 5.0 1 5 . <br /> Di-isopropyl Ether ND tig/L 5.0 1 5 <br /> Ethyl t-Butyl Ether ND jig/.L 5.0 1 5 <br /> t-Amyl Methyl Ether ND µgL 5.0 1 5 <br /> tert-Butyl Alcohol ND lzg/L 50 1 50 <br /> { <br /> i - <br /> i <br /> } <br /> i <br /> ND None Detected PQL : Practical Quantitation Limit Conversions: <br /> I, mg/L Milligrams/Liter = ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> pg/L Micrograms/Liter = ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> mg/kg Milligrams/Kilogram s ppm derived by(PQL x Dil) <br /> Ng/kg Micrograms/Kilogram — ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />