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A N A L Y `I' I C A L <br /> (LABORATORIES <br /> i <br /> 1 <br /> Certificate of Analysis <br /> Don Li ht <br /> DeE-Tec: Geotechnical Services Preparation Date 11/25/98 <br /> 10624 Olive Avenue Analysts Date 11/25/99 <br /> Oakdale, CA 95361 Report issue Date 12/02/98 <br /> Sample Date 11/13/98 <br /> submission Number 9811000367 Sample Time 14 55 <br /> Lab Number 86366 Sample Type LIQUID <br /> Protect Number George& Mae <br /> Protect Dese 1600 Durham Ferry <br />,Sample Description MW-4 <br /> Oxygenates by GUMS 8260M <br /> I <br /> I <br /> Analyte Result Units PQL Dil DLR <br /> Methyl t Butyl Ether ND L 5 0 1 <br /> Di-isopropyl Ether ND jug/L 5 0 1 5 <br /> Ethyl t Butyl Ether ND pg/L 50 1 5 <br /> Amyl Methyl Ether ND pg/L <br /> 50 1 5 <br /> ert Butyl Alcohol ND �g%L 50 1 5 <br /> !•'g SO <br /> ND None DetectedPQL Practical Quantitation Limit Conversions <br /> ons <br /> Mtlligrarn�/Lttcr ppm Di Dilution Factor 1 ppm = 1000 ppb <br /> IVliLrograms/Liter = ppb DLR Reportable Detection Limit 1 ppb = O 001 ppm <br /> Milligrams/Kilogram = ppm derived by (PQL x Dil) <br /> Nlicrograms/Kilogram — ppb Higher limits may result from exceptional sample matrices or interferences <br />' 1414 Stanislaus Street • Fresno, CA 93706-1623 Phone 209 497-2888 In CA 800 877-8310 • Fax 209-485 6935 <br />