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A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Liht <br /> Del-TeCT Geotechnical Services Report Issue Date 03/30/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 02/10/99 <br /> Submission Number 9902000483 Sample Time 15:48 <br /> Lab Number 98870 Sample Type LIQUID <br /> Project Number Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-7S <br /> BSK LABORATORIES LUFr ANALYSIS <br /> r <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> f EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> L. EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Toluene 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> PA 8020 <br /> kMODIFIED) <br /> EPA 8015/ Xylenes, Total 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> ? EPA 8015/ Gasoline 02/20/99 02/20/99 110 pg/L 50 1 50 <br /> �• EPA 8020 Lighter boiling-point hydrocarbons decreased relative to standard. <br /> (MODIFIED) <br /> EPA 8015/. Methyl-tert-Butyl 02/20/99 02/20/99 ND pg/L 5 1 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> f <br /> �. ND None Detected PQL : Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter - ppm Dil : Dilution Factor 1 ppm = 1000 ppb <br /> µg/L Micrograms/Liter - ppb DLR : Reportable Detection Limit 1 ppb = 0,001 ppm. <br /> r 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 interferences <br /> i <br /> I _ <br /> 1414 Stanistaus Street Fresno, CA 93706-1623 •. Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />