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FA1 501 <br /> 1_ "ME I <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, CaldorMa 94520 <br /> (415►6869600 a FAX(415)686-96E9 <br /> Kaprealian Engineering lnc. Client Project ID:Unocal,601 E.Ket+leman Lane,Lodi <br /> P.O.Box 996 <br /> Benicia,CA 94510 Reported: Mar 21, 1991 <br /> Attention: Mardo Kaprealian,P.E. QC Sample Group: 1030596 601 P <br /> QUALITY CONTROL.DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Tolaene benzene xyfenas <br /> Method: EPAROI5/6020 EPABO15/8020 EPA9015/6020 EPAS015IB020 <br /> Analyst: E.Hamilton E.Hamilton E.Hamilton E.Hamilton <br /> Reporting Units: jig/kg pg/kg PgAg Pg/k9 <br /> Date Analyzed: Mar 20, 1991 Mar 20, 1991 Mal 20. 1991 M 1r0 059991 <br /> QC Sample#: 103-0591 103-0591 103-0591 <br /> Sample Cone.: 0.57 0.91 0.066 0.73 <br /> Spike Cone. 0.40 1.2 <br /> Added: 0.40 0.40 <br /> Conc.Matrix 1.8 <br /> Spike: 0.87 1.4 0.33 <br /> Matrix Spike 89 <br /> %Recovery: 75 120 66 <br /> Conc.Matrix <br /> Spike Dup.: 01.2 0.32 1.5 <br /> .76 <br /> Matrix Spike <br /> Duplicate <br /> 96 Recovery: 48 73 64 <br /> 64 <br /> Relative 3.1 i8 <br /> Ditlerence: 13 15 <br /> 3E�tlOIA ANALYTICAL v Recovery: Conc.of M.S.•Conc.of Sample x 100 <br /> Spii(e Conc.Added <br /> Relative%pitfarence: Conc.of M.S.-Conc.of M.S.D. <br /> x100 <br /> Belinda C.Vega (Conc.of fd.S.+Conc.of M.S.a.l/2 1o3o59s KEI <4> <br /> Laboratory Director <br />