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I <br /> �- SEQUOIA ANALYTICAL � <br /> 680 Chesapeake Drive • Redwood City.CA 94063 <br /> (415)384-9600 • FAX(415)364-8233 <br /> LEscalon. <br /> wark fent ect URD / oc on <br /> Main Street <br /> CA 55320 <br /> ion Tina!,O a OC Sample Group 10504300432 ed-May 20, 1991 m <br /> QUALITY CONTROL DATA REPORT <br /> MALWE MA- <br /> Benzene Toluene Benzene XAM" <br /> EPA EPA EPA EPA <br /> Method 8015/8= Bois/swo 8015/8= 801S/$020 <br /> w.+ Analyst J Fontecha J FantecM J Fontecta J Fontecha <br /> Reporting Units MOW mg/kg mg/kg mp/kp <br /> Date Analyzed May 12, i991 May 12. 1991 May 1Z. 1991 May 14, toot <br /> �ws OC Sample# 106.0004 105.0004 105-0004 105-M <br /> Sample Cone: N D N D N D N D <br /> Spike Conc. <br /> Added- 040 040 040 1.2 <br /> tiv <br /> Conc.Matrix <br /> Spike: 044 040 040 1 1 <br /> Matrix Spike <br /> %Recovery* 110 100 100 92 <br /> Cone Matrix <br /> Spike Dup.: 046 036 026 1 1 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery 120 90 fay 92 <br /> Relative <br /> %Difference, 44 10 42 00 <br /> SE U,01A ANAL? %Raeowry- 0inc of M S- nc of le x 100 <br /> Spike Cone Add <br /> Aslative%Difference Cone of M S -Cone of M SO r 100 <br /> t Iia (Cone of M S +Cone of M 8 D <br /> oject Manager 1050430 WAT c2> <br />