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SEQUOIA ANALYTICAL <br /> 1900 B3tes Avenue - Suite LIVI - Concord, California 94520 <br /> N.Qr (510) 686-9600 FAX (510) 686-9689 <br /> :'Kaprealian Engineering, Inc. dien't Project ID: Unocal,601 E. Kettleman Ln., Lodi <br /> P.O. Box 996 <br /> Benicia, CA 94510 <br /> Attention: Mardo Kapreallan, P . QC Sample Group: 1120666-67 Reported: Jan 2, 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 8015/9020 8016/8020 <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 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 <br /> Sample #: 112-0666 112-M7 112-0668 112-0669 112-0670 112-0671 112-0672 <br /> Surrogate <br /> % Recovery: 92 88 87 82 86 78 96 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc,of Sample X 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Cone.of M.S.D. X 100 <br /> S 4oA. C h efe or (Conc.of M.S. + Cone.of M.S.D.)/2 <br /> i. m�."r # <br /> Project Manager <br /> 1120659-KEl <5> <br />