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M <br /> 1 <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis ? . <br /> Don Li ht <br /> Del-Tech 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 /> ; <br /> Submission Number 9902000483 Sample Due 02/10/99.Sample Time 13:20 <br /> Lab Number 98868 Sample Type LIQUID <br /> Protect Number ; Disco t <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-5 <br /> Oxygenates by.GC/MS-(8260M) <br /> Analyte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether NDL 5.0 1 <br /> �� 5 <br /> Di-isopropyl Ether NDL 5.0 1 5 <br /> Ethyl t-Butyl Ether ND juVL 5.0 1 5 <br /> t-Amyl Methyl Ether ND Fg/L 5.0 1 5 <br /> tert-Butyl Alcohol ND Ag/L 50 1 50 <br /> r <br /> l <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter - ppm Dii Dilution Factor 1 ppm = 1000 ppb <br /> µg/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 /> ug/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 />