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' A N A L Y T I <br /> C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> 'Don Ltght <br /> Del-Tech 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 121628 Sample Time 0000 <br /> Protect Number 6402 Sample Type SOLID <br /> Project Desc Ted Peters Trucking—UST <br /> Sample Description SB-1 20 5-21' <br />' <br /> Oxygenates.by GUMS 82bOM <br />'Analyte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether <br /> Di-isopropyl Ether ND �g/$g 20 1 20 <br />'Ethyl t-Butyl Ether ND ug/Kg 20 1 20 <br /> t-Amyl Methyl Ether ND Fug/Kg 20 1 20 <br /> tert-Butyl Alcohol ND ug/Kg 20 1 20 <br /> ND µg/Kg 200 1 200 <br /> 1 <br /> 1 <br /> 1 <br /> I <br /> I <br /> ND None Detected PQL Practical Quantitation Limit <br /> $/L M1111grams/Liter = ppm D1 DiIution Factor Conversions <br /> g/L Micrograms/Liter = ppb DLRReportable Detection Limit 1 PPrn = 1000 ppb <br /> L$ Milligrams/Kilogram = ppm derived by (PQL,x D11) 1 ppb = 0 Opt ppm <br /> Micrograms/Kilogram — ppb Higher I1mits may result from exceptional sample matrices or interferences <br /> I <br /> 1414 Stan'siaus Street * Fresno, CA 93706-1623 ° Phone 559-497-2888, In CA 800-877-8310 a Fax 559-485-6935 <br />