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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue s Suite I-M - Concord,California 94520 <br /> (510) 686-9600 FAX (510)686-9689 <br /> .M. <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal, 601 E. Kettleman Ln., Lodi <br /> P.O. Box 996 <br /> Benicia, CA 94510 <br /> Attention- Mardo Kaprealian, P . OC Sample Group: 1121024-1026 Reported: Jan 6, 1992 <br /> .......... <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 8015/8020 <br /> Analyst: J.F. J.F. J.F. J.F. <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Dec 29, 1991 Dec 29, 1991 Dec: 29, 1991 Dec 29, 1991 <br /> Sample#: 112-1024 112-1025 112-1026 Blank <br /> Surrogate <br /> % Recovery: 83 84 81 100 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.,Conc.of Sample 1 100 <br /> Spike Conc.Added <br /> Relative%Difference: Cone.of M.S.-Conc.of M.S.D. x 100 <br /> Belinda C. Vega (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> Laboratory Director <br /> 1120961.KEI <18> <br />