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1 <br /> Sequoia <br /> y� <br /> a 680 Chesapeake Drive Redwood City,CA'94063 (415) •364-9600 FAX(415) 364-9233 <br /> Analytical 1900 Bates Avenue,Suite L Concord,CA 94520 (510) :686-9600 FAX(510)686-9689 <br /> 819'Striker:Avenue,Suite 8 Sacramento,CA 95834 - (916) '921-9600 FAX(916)92.1-0100 <br /> ... ......... <br /> wIPDS Services Client Project I�: Unocal #0788, 8203 East 1 ith'8ti Tracy <br /> 2401 Stanwell Dr., Ste. 400 <br /> Concord, CA 94520 <br /> Attention: Avo Avedessian QC Sample Group: 4050628-34 Reported: May 27, 1994..: <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA EPA EPA EPA EPA <br /> a Method: 8015 Mod. 8015 Mod. 8015 Mod. .8015 Mod. 8015 Mod. 8015 Mod. 8015 Mod. <br /> Analyst: 'K.Wimer K.Wimer . K.Wimer K.Wimer K.Wimer K.Wimer K.Wimer <br /> Reporting Knits: µ9/L N9/L µ9/L N9/1- N9/L N9/E P9/L <br /> Date Analyzed: 5/26/94 5/26/94 5/26/94 5/26/94'; 5/26/94 -5/26/94 5/26/94 <br /> Sample#: 405-0628 40560629 405-0630 , 40570631 ; 405-0632".r 405-0633 405-0634 <br /> Surrogate <br /> %Recovery: 94 90. 98 96 96 95 87 <br /> SEQUOIA ANALYTICAL,#1271 %Recovery:' Cone.of M.S.-Cone.of Sample x 100 <br /> 1 pike Gone.Added <br /> 1 Relative%Difference: Cone.of M.S.-Conc.of M.S.D. x 100 <br /> B. e�11 (Conc.of M.S..+ Cone.of M.S.D.)/2 <br /> Project anager <br /> 4050628.MPD <6> <br />