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l 1 Ll <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> 46 <br /> Certificate of Analysis <br /> John Lane <br /> Ground Zero Preparation Date 11/19/98 <br /> 1714 Main Street Analysts Date 11/19/98 <br /> Escalon, CA 95320- Report Issue Date 11/25/98 <br /> Sample Date 11/10/98 <br /> Submission Number 9811000293 Sample Time 1545 <br /> Lab Number 85900 Sample Type SOLID <br /> Project Number 263 <br /> Project Desc Tubburg Warehouse <br /> Sample Description TW-1B <br /> Oxygenates by GC/MS (8260M <br /> Analyte Result Units PQL Dtl DLR <br /> Methyl-t-Butyl Ether 30 µg/Kg 20 1 20 <br /> Di-isopropyl Ether ND ug/Kg 20 1 20 <br /> Ethyl t-Butyl Ether ND µg/Kg 20 1 20 <br /> t-Amyl Methyl Ether ND jig/Kg 20 1 20 <br /> tert-Butyl Alcohol ND Jcg/Kg 200 1 200 <br /> ND None DetectedPQL PraLULal Quantitation Limit Conversions <br /> ma/L Milligrams/Liter = ppm Di Dilution Factor 1 ppm = 1000 ppb <br /> Ft5/L Micrograms,/Liter ppb DLR Reportable Detection L:= 1 ppb = 0 001 ppm <br /> m� Milligrams/Kilogram — ppm derived by (PQL e Dil) <br /> ug Micrograms/Kilogram = ppb Higher limits may result from exi-eptional sample matrices or interterente� <br /> 1414 Stanislaus Street A Fresno, CA 93706-1623 • Phone 209-497-2888, In CA 800-877-8310 • Fax 209-485-6935 <br />