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A N A L Y T I C A L <br /> LABORATORIES <br /> RECF=wF=n Certificate of Analysis <br /> Don L' h <br /> Del TechGeotechnical Services AUG 2 1 t999 Rep ort Issue Date 08/11/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 07/09/99 <br /> Submission Number 9907000435 Sample Time : 14:53 <br /> Lab Number 120891 Sample Type : LIQUID <br /> Project Number Valley Whlsale <br /> Project Desc. 2nd G nitoring <br /> Sample Description � 3BB <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015 / Benzene 08/09/99 08/06/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Ethylbenzene 08/09/99 08/06/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (M IFIED) <br /> E 15 / Toluene 08/09/99 08/06/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Xylenes, Total 08/09/99 08/06/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Gasoline 08/09/99 08/06/99 ND pg/L 50 1 50 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 08/09/99 08/06/99 ND pg/L 5 1 5 <br /> EPA 8020 Ether <br /> (MODIFIED) <br /> b <br /> ND None Detected PQL Practical 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 l ppb = 0.001 ppm <br /> mg/kg Milligrams/Kilogram — ppm derived by (PQL x Dil) <br /> p Micrograms/Kilogram = ppb Higher limits may result from exceptional sample matrices or interferences <br /> 16 1414 Stanislaus Street Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />