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Ii <br /> I <br /> A N A L Y T I C A L <br /> MLABORATORIES <br /> f <br /> Certificate of Analysis <br /> Don Light <br /> [ Del-Tech Geotechnical Services Report Issue Date : 03/30/99 <br /> 10624 Olive Avenue — <br /> Oakdale, CA 95361 <br /> Sample Date 02/11/99 <br /> 1 Submission Number 9902000483 Sample Time : 18:00 <br /> Lab Number 98894 Sample Type LIQUID <br /> Pro,ect Number Disco <br /> Prolect Desc. Ground Water Monitoring <br /> Sample Description NP-1-90' <br /> BSK LABORATORIES LOFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 02/23/99 02/23/99 7800 µg/L 0.3 2000 600 <br /> .� EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/23/99 02/23/99 1400 pg/L 0.3 200 60 <br /> ` EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Toluene 02/23/99 02/23/99 11000 µg/L 0.3 2000 600 <br /> T7 IPA 8020 <br /> ,MODIFIED) <br /> EPA 8015/ Xylenes, Total 02/23/99 02/23/99. 8300 pg/L 0.3 200 60 <br /> EPA 8020 <br /> (MODIFFED) <br /> EPA 8015/ Gasoline 02/23/99 02/23/99 76000 yg/L 50 200 10000 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 02/23/99 02/23/99 ND 5 200 1000 <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 /> {eg/L Micrograms/Liter - ppb DLR Reportable Detection Limit 1 ppb-= 0.001 ppm <br /> f 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 /> I <br /> r - <br /> 1414 Stanislaus Street Fresno, CA 93706-1623 Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />