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A N A i. Y T [ C A L <br /> r LABORATORIES <br /> Certificate of Analysis <br /> I'D on <br /> L�$ht <br /> Del-Tech Geotechnical Services Report Issue Date : 04/14/99 <br /> [10624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 03/25/99 <br /> Submission Number 9903000814 Sample Time 13:14 <br /> LLab Number 104967 Sample Type LIQUID <br /> -Pro'!ect Number Valley Showcase <br /> Project Desc. G.W. Monitoring <br /> ,Sampie Description MW-2 <br /> BSK LABORATORIES LUFT ANALYSIS <br />` Date Date <br /> :Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8013 / Benzene 04/04/99 04/04/99 83 Mcg/L 0.3 40 12 <br /> EPA 3020 <br /> (MODIFIED) <br /> EPA S015 / Ethvlbenzene 04/04/99 04/04/99 77 Yg/L 0.3 40 12 <br /> EPA SO.0 <br />'_- (,MODIFIED) <br /> F"' A015 / Toluene 04/04/99 04/04/99 33 jg/L 0.3 1 0.3 <br /> l <br /> L��DIFIED) <br /> [EPA 8015 / Xylenes, Total 04/04/99 04/04/99 300 µg/L 0.3 40 12 <br /> EPA S02C <br /> ('.1vI0DIFiED) <br /> 4 EPA 3015 / Gasoline 04/04/99 04/04/99 1700 deg/L 30 1 50 <br /> EPA 5020 <br /> (N10D1:,:ED) <br /> t' SOf5 :Methyl-tent-Butyl 04/04/99 04/04/99 ND peg/L IO 1 10 <br /> EPA S=2' Ether <br /> (I.IUDI`rED) <br /> vD None Detected PQL Practical Quantitation Limit Conversions: <br /> m;./L Miiligrams/Liter = ppm Di Dilution Factor 1 ppm = 1000 ppb <br /> µg/L Micrograms/Liter = ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> Milligrams/Kilogram ppm derived by (PQL x Dil) <br /> ug/kgs Micrograms/Kilogram = ppb Higher limns may result from exceptional sample matrices or interferences <br /> :DIY Sranislaus Street Fresno, CA 93706-1623 Phone 559-497-2888. In CA 8()0-877-8310 Fax <br />