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i <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> {i <br /> Certificate of Analysis <br /> Don Light <br /> Del-Tech Geotechnical Services Report Issue Date 03/04/99 <br /> 14624 Olive Avenue <br /> Oakdale, CA 95361 <br /> , <br /> Submission Number 9902000483 Sample Date 02/10/99Sample Time 15:00 <br /> Lab Number 98869 Sample Type LIQUID <br /> Project Number Diso <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-4 <br /> BSK LABORATORIES LUFI'ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 02/20/99 02/20/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/20/99 02/20/99 ND deg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> A 8015/ Toluene 02/20/99 02/20/99 ND pg/L 0.3 1 0.3 <br /> —.'A 8020 <br /> (MODIFIED) <br /> EPA 8015/ Xylenes,Total 02/20/99 02/20/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ GasoIine 02/20/99 02/20/99 ND jA /L 50 1 50 <br /> EPA 8020 g <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 02/20/99 02/20/99 ND pg/L 5 I 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter - ppm Dif Dilution Factor 1 ppm = 1000 ppb <br /> ug/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> mg/k; Milligrams;Kilogram — ppm derived by(PQL x Dil) <br /> j�g/kg Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> i <br /> I <br /> 1414 Stanisiaus Street • Fresno, CA 93706-1623 41 Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />