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A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> 'Don Lt ht <br /> Dei-Tec Geotechnical Services <br /> 10624 Olive Avenue Preparation Date 07/25/99 <br /> 'Oakdale, CA 95361 Analysis Date 07/25/99 <br /> Report Issue Date 08/09/99 <br /> Submission Number 9907000590 Sample Date 07/19/99 <br /> Lab Number 121635 Sample Time 00 00 <br />=Pro,ect Number 640 2 Sample Type SOLID <br /> Project Desc Ted Peters Trucking UST <br />'Sample Description MW-2 15 5-16' <br /> Oxygenates by GUMS (8260M) <br /> Analyte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether ND Ag/Kg 20 1 <br /> Di-isopropyl Ether ND 20 <br /> Ethyl t-Butyl Ether ND µg/Kg 20 1 20 <br /> t-Amyl Methyl Ether ND µg/Kg 20 1 20 <br /> tert-Butyl Alcohol ND µg/Kg 20 1 20 <br /> µg/Kg 200 1 200 <br /> lie <br /> 1 <br /> ND None Detected PL Practical Quantitation Limit <br /> 1,ug/L <br /> mg/L Milligrams/Later ppm Di Dilution Factor Conversions <br /> Micrograms/Liter = ppb DLR Reportable Detection Limit 1 ppm = 1000 ppb <br /> g Milligrams/Kilogram = ppm derived by (PQL x Dil) ppb = 0 001 ppm <br /> 9 Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> I1414 Stanislaus Street • Fresno, CA 93706-1623 11 Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />