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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suile LM • Concord,California 94520 <br /> ONO (510) 686.9600 FAX (510) 686-9689 <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.E. OC Sample Group: 1120659-665 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 8015/8020 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 rn9/k9 mg/kg <br /> Date Analyzed: Doe 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 Dec 23, 1992 <br /> Sample 112-0659 112-0560 1124)661 112-M2 112-0663 112-0664 112-M5 <br /> Surrogate <br /> % Recovery: 96 96 97 96 96 96 80 <br /> .SEQUOIA ANALYTICAL %Recovery: Cone.of M.S.-Cone.of Sample X 100 <br /> Spike Cone.Added <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X 100 <br /> Scott A. Chieffo (Cone.of M.S. + Cone.of M.S.D.)/2 <br /> ;�ain, <br /> Project Manager <br /> 1120659-KEI <4> <br />