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1 <br /> A N A L Y T I C A L <br /> LABORATORIES <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 03/30/99 <br /> Sample Date 02/11/99 <br /> Submission Number 9902000483 Sample Time 11:18 <br /> Lab Number 98877 Sample Type LIQUID <br /> Pro,ect Number Disco <br /> Prolect Desc. Ground Water Monitoring <br /> Sample Description MW-8S <br /> Oxygenates by GUMS L8260M) <br /> Analyte Result Units PQL Dil DLA <br /> Methyl-t-Butyl Ether ND 1Lg/L 5.0 1 5 <br /> Di-isopropyl Ether ND µg/L 5.0 1 5 <br /> Ethyl t-Butyl Ether ND µg/L 5.0 1 5 <br /> t-Amyl Methyl Ether ND juWL 5.0 1 5 <br /> tert-Butyl Alcohol ND jcg/L 50 1 50 <br /> I <br /> t <br /> l <br /> { <br /> 3 <br /> ND None Detec[ed PQL Practical Quantitation Limit Conversions: <br /> mg/l. Milligrams/Liter — ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> lcg/L Micrograms/Liter — ppb DLR Reportable Detection Limit 7 ppb = 0.001 ppm { <br /> mg/kg Milligrams/Kilogram - ppm derived by(PQL x Dil) I <br /> jAg/kg Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street 0 Fresno, CA 93706-1623 e Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />