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A N A L Y` 'T 1 :1C A L <br /> LABOR-ATOMES <br /> Certificate of Analysis <br /> Don Light Preparation Date 10/06/98 <br /> Del-Tech Geotechnical Services Analysis Date : 10/06/98 <br /> 10624 Olive Avenue Report Issue Date 10/15/98' <br /> Oakdale, CA 95361 <br /> Sample Date 09/24/98 <br /> 9809000817 Sample Time 00:00 <br /> Submission Number 79708 Sample Type SOLID <br /> Lab Number ; <br /> Project Number 3012 E.Waterloo <br /> Project Desc. Advanced Auto <br /> Sample Description TK-2-S-14.5' <br /> Oxygenates by GC/MS (8260M1 <br /> Units PQL Dil <br /> DLR <br /> Analyte Result <br /> ND ug/Kg 20 1 20 <br /> Methyl-t-Butyl Ether /K 20 1 20 <br /> Di-isopropyl Ether NSD µg/Kg 20 1 20 <br /> Ethyl t-Butyl Ether /K 20 1 20 <br /> t-Amyl Methyl Ether NSD µg/Kg 200 1 200 <br /> tert-Butyl Alcohol <br /> Conversions: <br /> ND . None Detected PQL Practical Quantitation Limit 1 ppm _ 1000 ppb <br /> • mg/L . Milligrams/Liter = ppm Di Dilution Factor .1 Ppb = 0.001 ppm <br /> pg/L . Micrograms/Liter = ppb DLR Reportable Detection Limit <br /> mg/kg . Milligrams/Kilogram = ppm derived by(PQL x Dil) <br /> pekg . Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> -8310 Fax 209-485-6935 <br /> 1414 Stanislaus Street. Fresno, CA 93706-1623 Phone 209-497-2888; In CA 800-877 <br />