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1 <br /> AN A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Light <br /> i. Del-Tech Geotechnical Services Repan Issue Dace : 03/30/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Submission Number 9902000483 Sample Date 02/11/99Sample Time 10:22 <br /> Lab Number 98876 Sample Type LIQUID <br /> Project Number : Disco <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-10 <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 ND µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/23/99 02/23/99 ND µg/L 0.3 l 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Toluene <br /> j -PA 8020 02/23/99 02/23/99 ND µg/L 0.3 1 0.3 <br /> (MODIFIED) <br /> EPA 8015 / Xylenes, Total 02/23/99 02/23/99 ND jcg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 02/23/99 02/23/99 ND ug/L 50 1 50 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 02/23/99 02/23/99 ND pg/L 5 1 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> f <br /> ND None DetectedPQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter - ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> jig/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 /> µg/kg Micrograms/Kilogram ppb Higher limits may result from exceptional sample matrices or interferences <br /> r <br /> 1414 Stanislaus Street - Fresno, CA 93706-1623 0 Phone 559-497-2888, In CA 804.877-8310 - Fax 559-485-6935 <br />