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A N A► L Y 'T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br />'Don L, ht <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 09/09/99 <br /> Submission Number 9907000590 Sample Date 07/19/99 <br /> Sample Time 0000 <br /> Lab Number 121632 e Sam lType SOLID <br /> Protect Number 6402 <br /> p yP <br /> Protect Desc Ted Peters Trucking_UST <br /> Sample Description MW-1 20 5-21' <br />' Oxv enates bv GC/MS 8264M <br />'Analyte Result Units PQL Dil DLR <br /> Methyl-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 J.ig/Kg 20 1 20 <br /> tert-Butyl Alcohol ND deg g 200 1 200 <br /> 1 <br /> I <br /> I <br /> ND None Detected P Practical Quantitation Limit Conversions <br /> Img/L Milligrams/Liter = ppm Dl Dilution Factor 1 PPrn = 1000 ppb <br /> µg/1; Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0 001 ppm <br /> g Milligrams/Kilogram = ppm derived by (PQL x DA) <br /> Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> I1414 Stanislaus Street 0 Fresno, CA 93706-1623 o Phone 559-497-2888, In CA 800-877-8310 o Fax 559-485-6935 <br />