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' b A N A L Y T I C A L <br /> LABORATORIES <br /> • <br /> Certificate of Analysis <br /> Don Lahr <br /> Del-Tec Geotechnical Services Preparation Date 07/25/99 <br /> 10624 Olive Avenue Analysis Date 07/25/99 <br />'Oakdale, CA 95361 Report Issue Date 08/09/99 <br /> Sample Date 07/19/99 <br /> Submission Number 9907000590 Sample Time 0000 <br />'Lab Number 121888 Sample Type SOLID <br /> Project Number 6402 <br /> Project Desc Ted Peters Trucking—UST <br /> Sample Description SB-2 25 5-26' <br />' Oxygenates by GUMS 8260M <br /> LAnalyte Result Units PQL DiI DLR <br /> ethyl-t-Butyl Ether ND ug/Kg 20 1 20 <br /> Di-isopropyl Ether ND µg/Kg 20 1 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 pg/Kg 200 1 200 <br /> 1 <br /> I <br /> ND None Detected PQL Practical Quantitation Limit Conversions <br /> g/L Milligrams/Liter — ppnn D,1 Dilution Factor 1 ppm = 1000 ppb <br /> g/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0 001 ppm <br /> g Milligrams/Kilogram — ppm derived by{PQL x D,1} <br /> Micrograms/Kilogram — ppb Higher limits may result from exceptional sample matrices or interferences <br />' 1414 Stanislaus Street 0 Fresno, CA 93706-1623 0 Phone 559-497-2888, In CA 800-877-8310 o Fax 559-485-6935 <br />