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A N A L Y T r C <br /> . A L <br /> LABORATORIES <br /> lie <br /> Certificate of Analysis <br /> Don Li ht <br /> Del-Tech Geotechnical Services <br /> 10624 Olive Avenue Report Issue Date 02/23/99 <br /> Oakdale, CA 95361 <br /> Submission Number 9902000201 Sample Date 02/01/99 <br /> Lab Number 97546 Sample Time 12:11 <br /> Project Number Sample Type ; LIQUID <br /> Project Desc. Valley Wholesale G.W. <br /> Sample Description MW-3 <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method <br /> Analyte Prep. Anal. Result <br /> Units PQL Dil DLR <br /> EPA 8015 / Benzene 02/14/99 02/14/99 <br /> EPA 8020 0.57 ug/L 0.3 1 <br /> (MODLFIED) 0'3 <br /> EPA 8015 / Ethylbenzene 02/14/99 02/14/99 2,4 <br /> EPA 3020 µg/L 0 3 <br /> 1 0.3 <br /> 4S1FLED) <br /> 015 / Toluene 02/14/99 02/14/99 ND <br /> EPA 8020 µ$/L 0.3 1 0.3 <br /> (MODIFIED) <br /> EPA 8015 / Xylenes, Total 02/14/99 02/14/99 <br /> EPA 8020 0.63 µg/L 0.3 1 <br /> (MODIFIED) 0.3 <br /> EPA 8015 / Gasoline 02/14/99 02/14/99 160 <br /> EPA 8020 µg/i so 1 <br /> (1IODIFIED)EPA 50 <br /> EPA 8015/ Methyl•tert•ButEtheryl 02/14/99 02/14/99 7.2 deg/L 5 1 <br /> (NIODLFIED) rr <br /> p�7 <br /> NrD None Detected PQL Practical Quantitation Limit <br /> m;/L Milligrams/Liter = ppm Di Dilution Factor Conversions: <br /> ug/L Micrograms/Liter 4 ppb DLR Reportable Detection Limit pPm 1000 ppb <br /> m°/kg Milligrams/Kilogram — ppm derived by(PQL x Dil) 1 Ppb = 0.001 ppm <br /> Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street , Fresno, CA 93706-1623 a Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br />