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SEQUOIA A14ALYTICAL <br /> 1900 Bates Avenue * Suite LM - Concord,California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> .'.71(aprealian 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: 1120968-974 Reported: Jan 6, 1992 <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 8015/8020 <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#: 112-0968 1124)969 112-D970 112-0971 112-0972 112-0973 1124)974 <br /> Surrogate <br /> %Recovery: 98 98 96 99 100 96 100 <br /> SEQUOIA ANALYTICAL %Recovery: Gone.of M.S.-Gone.of Sample x 100 <br /> Spike Cone.Added <br /> Relative%Difference; Cone.of M.S.-Cone.of M.S.D. x 100 <br /> Belinda C.Vega (Cone.of M.S. + Conc.oi M.S.D.)/2 <br /> Laboratory Director <br /> 1120961-KEI <10> <br />