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J <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> f <br /> Don Liht <br /> Del-Tec Geotechnical Services Report Issue Date 03/12/99 <br /> �. 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 02/10/99 <br /> Submission Number 9902000483 Sample Time 15:47 <br /> Lab Number 98901 Sample Type LIQUID <br /> Project Number Diso <br /> Protect Desc. Ground Water Monitoring <br /> Sample Description MW-7SBB <br /> BSK LABORATORIES LUFf ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 03/05/99 03/05/99 ND j.g/L 0.3 1 0.3 <br /> i EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 03/05/99 03/05/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> 'k40DIFIED) <br /> EPA 8015/ Toluene 03/05/99 03/05/99 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> I, (MODIFIED) <br /> EPA 8015/ Xylenes, Total 03/05/99 03/05/99 ND µg/L .0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 03/05/99 03/05/99 ND µg/L 50 1 50 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tcrt•Butyl 03/05/99 03/05/99 ND ug/L 5 1 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> ND None Detected PQL Practical Quantitation Limit Conversions: <br /> tng/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 /> mg/kg Milligrams/Kilogram — ppm derived by (PQL x Dil) <br /> ;/k; 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 />