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A N A L Y <br /> � T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Liht <br /> Del-TeN Geotechnical Services Report Issue Date 03/30/99 <br /> I 10624 Olive Avenue <br /> Oakdale, CA 95361 <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 /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL DiI DLR <br /> EPA 8015 ! Benzene 02/23/99 02/23/99 ND ug/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/23/99 02/23/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ ToIuene 02/23/99 02/23/99 ND 1cg/L 0.3 1 0.3 <br /> 7PA 8020 <br /> MODIFIED) <br /> � EPA 8015/ Xylenes, Total 02/23/99 02/23/99 ND ktg/L 0.3 1 0.3 <br /> . . EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 02/23/99 02/23/99 ND µg/L 50 1 50 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 02/23/99 02/23/99 ND µg/L 5 1 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <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 /> µg/kg Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> i <br /> 1414 Stanislaus Street Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />