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1 <br /> A N A L Y T I C A L <br /> LABORATORIES <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 /> Submission Number : 9902000483 Sample Time ; 16:13 <br /> Lab Number . 98889 Sample Type : LIQUID <br /> Proiect Number : Disco <br /> Project Desc. : Ground Water Monitoring <br /> I Sample Description . MW-1 <br /> i <br /> BSK LABORATORIES LUFr ANALYSIS <br /> Date Date <br /> �. Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 02/23/99 02/23/99 4.1 pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 02/23/99 02/23/99 1.5 ug/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Toluene 02/23/99 02/23/99 12 pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> MODIFIED) <br /> EPA 80151 Xylenes,Total 02/23/99 02/23/99 11 pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 02/23/99 02/23/99 84 pg/L 50 1 50 <br /> i EPA 8020 Individual peaks inconsistent with fuel 'fingerprint". <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 /> r <br /> { ND None Detected . PQL : Pmaical Quantitation Limit Conversions: <br /> { mg/L Milligrams/Liter — ppm Dil : Dilution Factor 1 ppm = 1000 ppb <br /> pg/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 /> pg/kg : . Micrograms/Kilogram — ppb Higher limits may result from exceptional sample matrices or interferences <br /> r - <br /> 1414 Stanislaus Street • Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />