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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue - Suite LM - Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal,6d1'E. Keftieman Ln., 11-6di <br /> P.O. Box 9% <br /> Benicia,CA 94510 <br /> Attention: Mardo Kaprealian, P.E. OC Sample Group: 1121003-1009 Reported: Jan 6. 1992 <br /> ............ .. <br /> ... ..... .. <br /> ........................... <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA EPA EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 8015/8020 8015/8020 8015/8020 8015/6020 <br /> Analyst: J.F. J.F. J.F. J.F. J.F. J.F. - J,F. <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Dec 29, 1991 Dec 29, 1991 Dec 29, 1991 Dec 29, 1991 Dec 29, 1991 Dec 29, 1991 Dec 29, 1991 <br /> Sample 112-1003 112-1004 112.IDD5 112-1006 112-1007 112-1008 112-1009 <br /> Surrogate <br /> %Recovery: 98 110 110 110 110 100 100 <br /> .SEQUOIA ANALYTICAL %Recovery: Conc.of M.S,-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Belinda C.Vega (Cone.of M.S. + Conc.of M.S.D.)/2 <br /> Laboratory Director <br /> 1120961,KEI <15> <br />