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A N A L Y T I C A L <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Light RECEIVED <br /> Del-Tech Geotechnical Services Report Issue Date : 08/11/99 <br /> 10624 Olive Avenue AUG 2 f 1999 <br /> Oakdale, CA 95361 <br /> HUNTER & ASSOC Sample Date 07/09/99 <br /> Submission Number 9907000435 Sample Time 14:54 <br /> Lab Number 120888 Sample Type LIQUID <br /> Project Number Valle Whlsale <br /> Project Desc. 2nd�tr. GW Monitoring <br /> Sample Description MW-3 <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 07/23/99 07/23/99 / 1.3 µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 07/23/99 07/23/99 2.4 µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> MIED) <br /> P4f,5 / Toluene 07/23/99 07/23/99 8.2 µg/L 0.3 1 0.3 <br /> EPA 8020 <br /> 'MODIFIED) <br /> EPA 8015/ Xylenes, Total 07/23/99 07/23/99 6.1 <br /> EPA 8020 µg/L 0.3 1 0.3 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 07/23/99 07/23/99 200 µg/L 50 1 50 <br /> EPA 8020 <br /> ,I ODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 07/23/99 07/23/99 ND f µg/L 5 1 5 <br /> EPA 8020 Ether <br /> MODIFIED) <br /> , <br /> VD None Detected PQL Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter Q ppm Dit Dilution Factor 1 ppm = 1000 ppb <br /> ug/L Micrograms/Liter — ppb DLR Reportable Detection.Limit 1 ppb = 0.001 ppm <br /> :ug/kg Milligrams/Kilogram a ppm derived by (PQL x Dil) <br /> i�g 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 />