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ANA L Y T . I CAL <br /> LABORATORIES <br /> r <br /> Certificate of Analysis <br /> Don Light <br /> Del-Tech Geotechnical Services Preparation Date : 02/22/99 <br /> 10624 Olive Avenue Analysis Date : 02/22/99 <br /> Oakdale; CA 95361 Report Issue Date : 03/30/99 <br /> r <br /> Sample Date : 02/10/99 <br /> Submission Number 9902000483 Sample Time : 17:45 <br /> Lab Number 98874 Sample Type : LIQUID <br /> Project Number Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-9 <br /> Oxygenates by„GUMS (8260M) <br /> Analyte Result Units PQL Dil DLR <br /> Methyl-t-Butyl Ether ND pg/L 5.0 1 5 �- <br /> Di-isopropyl Ether ND 1cg/L 5.0 1 5 <br /> Ethyl t-Butyl Ether ND jug/.I. 5.0 i 5 <br /> t-Amyl Methyl Ether ND pg/L 5.0 1 5 <br /> tert-Butyl Alcohol ND pg/L 50 1 50 <br /> i <br /> I <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter — ppm Dil :- Dilution Factor 1 ppm = 1000 ppb <br /> pg/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 /> pg/kg Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferencr< <br /> 1414 Stanislaus Street 9 Fresno, CA 93706-1623 •. Phone 559-497-2888, In CA 800-877-8310 - Fax 559-485-6935 <br />