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A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Li ht <br /> Del-TecT Geotechnical Services Preparation Date 04/24/98 <br /> 10624 Olive Avenue Analysis Date 04/24/98 <br /> Oakdale, CA 95361 Report Issue Date 04/29/98 <br /> Sample Date 04/17/98 <br /> Submission Number 9804000585 Sample Time 17:25 <br /> Lab Number 57581 Sample Type LIQUID <br /> Project Number Quarterly GW <br /> Project Desc. Delmonte <br /> Sample Description NPI-80' Grab <br /> Oxygenates by GUMS (826 ft <br /> Analvte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether NDL 10.0 4 <br /> k�/ 40 <br /> Di-isopropyl Ether ND /cg/L 5.0 4 20 <br /> Ethyl t-Butyl Ether ND lg/L 5.0 4 20 <br /> t-Amyl Methyl Ether ND pg/L 5.0 4 20 <br /> ND None Detected1'QL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter = ppm Di Dilution Factor 1 ppm = 1000 ppb <br /> ug/L . Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> mg/kg Milligrams/Kilogram = ppm . derived by (PQL x Dil) <br /> µg/kg Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street 0 Fresno, CA 93706 • Phone 209-497-2888, In CA 800-877-8310 0 Fax 209-485-6935 <br />