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A <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Li$ht <br /> Del-Tech Geotechnical Services� <br /> 10624 Olive Avenue Report Issue Dace 03/30/99. <br /> Oakdale, CA 95361 <br /> Submission Number 9902000483 Sample Date 02/11/99Sample Time 15:10 <br /> ! Lab Number 98887 Sample Type LIQUID ' <br /> Protect Number Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-SVE NORTH <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 46 Ag/L 0.3 100 30 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/23/99 02/23/99 9.6 jug/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Toluene 02/23/99 02/23/99 ND leg/L 0.3 100 30 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Xylenes,Total 02/23/99 02/23/99 110 yg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 02/23/99 02/23/99 1500 lug/L 50 1 50 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 02/23/99 02/23/99 ND Ag/L 5 100 500 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> ND None Detected PQL ; Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter - ppm Dir Dilution Factor 1 ppm = 1000 ppb <br /> p6L Micrograms/Liter - ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> 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 /> 1414 Stanislaus Street Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 - Fax 559-485-6935 <br />