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SEQUOIA ANALYTICAL <br /> 1900 133tes Avenue - Suite LM - Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> Xaprealian Engineering, Inc. Client Project ID: Unocal, 601 E. Kenleman Ln., Lodi <br /> P.O. Box 996 <br /> ,Benicia, CA 94510 <br /> .:Anention: Mardo Kap realign, P.E. OC Sample Group: 1120953-60 Reported: Jan 13, 1992 <br /> .................. <br /> .......... <br /> ............... ....... <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA <br /> Method: 8015/8020 8015/8020 EPA 8015 EPA 8015 EPA 8015 EPA 8015 EPA 8015 <br /> Analyst: K.N. K.N. A.Tuzon A.Tuzon A.Tuzon A.Tuzon A.Tuzon <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 <br /> Sample #. 112-0960 Blank 112-0953 112-0954 112-0955 112-0956 112-0957 <br /> Surrogate <br /> %Recovery: 84 98 150 140 150 140 140 <br /> &EQUOIA 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 /> Belinda C. Vega (Conc,of M.S. + Conc.oi M.S.D.)/2 <br /> Laboratory Director 1120953.KEt <15> <br />