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i <br /> A N A L Y T I C A L <br /> WRLABORATORIES <br /> Certificate of Analysis <br /> Don Liht <br /> Del-Tec Geotechnical Services Report Issue Date 03/30/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 02/11/99 <br /> Submission Number ' 9902000483 Sample Time 13:06 <br /> Lab Number 98878 Sample Type LIQUID <br /> Project Number Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-8D <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date { <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 02/23/99 02/23/99 ND µg/L 0.3 1 0.3-F <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenxene 02/23/99 02/23/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Toluene 02/23/99 02/23/99 ND µg/L 0.3 1 M <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Xylenes,Total 02/23/99 02/23/99 ND µg/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 /> I <br /> 4 <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter — ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> AOL 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 Fresno, CA 93706-1623 Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />