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MANA L Y PI CAL <br /> LABORATORIES <br /> Certificate of Analysis <br />�on Liht <br /> el-Tec Geotechnical Services Preparation Date 03/02/99 <br /> 10624 Olive Avenue Analysis Date 03/02/99 <br /> takdale, CA 95361 Report Issue Dare 03/12/99 <br /> Sample Date 02/19/99 <br /> bmission Number 9902000697 Sample Time 16:10 <br /> b Number 100233 Sample Type LIQUID <br /> froject Number GW-Monitoring <br /> Project Desc. Sinclair Trucking <br /> mple Description MW-4 <br /> Oxygenates by GC/MS (8264M) <br /> nalyte Result Units PQL Dil DLR <br /> ethyl-t-Butyl Ether ND /L 5.0 1 <br /> ug 5 <br /> Di-isopropyl Ether ND ug/L 5.0 1 5 <br /> Ethyl t-Butyl Ether ND µg/L 5.0 1 5 <br /> Amyl Methyl Ether ND µg/L 5.0 1 5 <br /> tert-Butyl Alcohol ND µg/L 50 1 50 <br /> I <br /> 1 <br /> 1 <br /> 1 <br /> D None DetectedPQL Practical Quantitation Limit Conversions: <br /> L Milligrams/Liter = ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> )1 Micrograms/Liter = ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> ]Milligrams/Kilogram — ppm derived by (PQL x Dil) <br /> Micrograms/Kilogram A ppb Higher limits may result from exceptional sample matrices or interferences <br /> 14I4 5tanislaus Street • Fresno, CA 93706.1623 9 Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />