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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> --r (415)364-9600 FAX(415)364 9233 <br /> U.S.Technical Environmental Consult. CI10nt Project Ib' <br /> 1414 N.Broadway Rd. <br /> :Tempe,AZ 85282 <br /> -,Attention: Rowland Hall <br /> QC Sample Graup i1i 4620 <br /> Reported DOC t <br /> i QUALITY CONTROL DATA REPORT <br /> ANALYTE enzene <br /> Benzene Toluene Chloro- <br /> ( <br /> i..y b <br /> E <br /> , w <br /> j <br /> { ; Method: EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: AFulcher A.Fuicher A.Fulchar <br /> f <br /> Reporting Units: ua/� +'s/i- pg/u <br /> ¢ 1991 <br /> Date Analyzed: Dec s, 1991 Dec s, � , Dec <br /> C]C Sample#: Blank Blank <br /> Blank 9.nkk <br /> Sample Conc.: N.D. N.D. N.D. <br /> 4 <br /> i Spike Conc. 5.0 5.0 <br /> Added: 5.0 <br /> 's <br /> Conc.Matrix 4.8 5.2 <br /> _ Spike: 4.4 <br /> Matrix Spike 96 104 <br /> %Recovery: 88 <br /> Conc,-,matrix 4.8 5.1 <br /> Spike Dup.: 4.5 <br /> Matrix Spike <br /> Duplicate 102 <br /> %Recovery: 90 96 <br /> Relative 0.0 1,9 <br /> %Difference: 2.2 <br /> j SEQUOIA ANALYTICAL %Recovery: <br /> Conc.of M.S.•Canc.o!Sample z t00 <br /> Spike Conc.Added <br /> IaGve%Difference: Conc.of M.S Cono.of M.S.C. x 100 <br /> M.S.+Cont.at M.S.D.1/2 1114fi14.U57 <7? <br /> Wile A.Springer 1 <br /> Project Manager <br />