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i <br /> 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 Report Issue Date 03/04/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 02/10/99 <br /> Submission Number 9902000483 Sample Time : 13:20 <br /> Lab Number 98868 Sample Type LIQUID <br /> Project Number Diso <br /> Project Dese. Ground Water Monitoring <br /> Sample Description MW-5 <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> 1 ' <br /> EPA 8015/ Benzene 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/20/99 02/20/99 ND Mcg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> 'A 8015/ Toluene 02/20/99 02/20/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Xylenes, Total 02/20/99 02/20/99 ND jug/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 02/20/99 02/20/99 <br /> 76 dig/L 50 1 SO <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 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 /> f µg/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 /> ug/kg Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> E <br /> j 1414 Stanislaus Street • Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />