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1 <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> 1 <br /> Certificate of Analysis <br /> Don Liht <br /> Del-TecT Geotechnical Services Preparation Date 02/22/99 } <br /> 10624 Olive Avenue Analysis Date 02/22/99 ` <br /> Oakdale, CA 95361 Report Issue Date 03/30/ 9 <br /> Sample Date 02/10/99 <br /> Submission Number 9902000483 Sample Time 15:48 <br /> Lab Number : 98870 Sample Type LIQUID <br /> Project Number Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-7S <br /> Oxygenates by GUMS (8260M) k <br /> Analyte Result Units PQL Dil. DLR k <br /> Methyl-t-Butyl Ether ND !ag/L 5.0 1 5 <br /> Di-isopropyl Ether ND µg/L 5.0 1 5 } <br /> Ethyl t-Butyl Ether ND u�L 5.0 1 5 <br /> t-Amyl Methyl Ether ND k/L 5.0 1 5 <br /> tert-Butyl Alcohol ND L 50 1 50 { <br /> r <br /> I <br /> 1 <br /> ND None Detected PQL ; Practical Quantitation Limit Conversions: <br /> mg/L : Milligrams/Liter - ppm Di[ Dilution Factor 1 <br /> ppm = 1000 ppb <br /> pg/L : Micrograms/Liter — ppb DLR Reportable Detection 'Limit 1 ppb = 0.001 ppm <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 /> r <br /> 1414 5tanislaus Street • Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />