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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM a Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> 7' a <br /> .......... .... <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal,601 E. Kettleman Ln., Lod <br /> P.O. Box 996 <br /> Benicia, CA 94510 <br /> Attention: Mardo Kaprealian, P.E. OC Sample Group: 2010084-92 Reported: Jan 10, 1992 <br /> .. ......... <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA EPA EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/6020 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: ug/L ug/L ug/L ug/L Ug/L Ug/L ug/L <br /> Date Analyzed: Jan 6, 1992 Jan 6, 1992 Jan 6, 1992 Jan 6, 1992 Jan 6, 1992 Jan 6, 1992 Jan 6, 1992 <br /> Sample 201-0084 201-0085 201-0086 201-0087 201-0088 201-D089 201-0090 <br /> Surrogate <br /> %Recovery: 94 110 96 96 92 92 88 <br /> EOUOIA ANALYTICAL %Recovery. Conc.of M.S.-Cone.of Sample X 100 <br /> Spike Conc.Added <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X 100 <br /> Belinda C. Vega (Conc,of M,S, + Cone,of M.S.D.) <br /> Laboratory Director <br /> 2010084.KE1 <3> <br />