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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue - Suite LM v Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> ......... ... . <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal, 601 E..'Ki6ttleman Ln., Lodi <br /> ,:.. <br /> P.O. Box 996 <br /> 'Benicia, CA 94510 <br /> Attention: Mardo Kaprealian, P.E. OC Sample Group.: 1120953-60 R ported: Jan 13, 1992 <br /> e <br /> .......... .......... <br /> X <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> Method: EPA 8015 EPA 8015 EPA 8015 EPA 8015 <br /> Analyst: A.Tuzon A.Tuzon A.Tuzon A.Tuzon <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 Jan 2, 1992 <br /> Sample#: 112-0958 112-0959 112-0960 Blank <br /> Surrogate <br /> %Recovery: 140 140 140 140 <br /> *SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample X 100 <br /> Spike Conc.Added <br /> Relative% Difference: Conc.of M.S.-Conc.of M.S.D. X IDO <br /> Belinda C.Vega (Conc.of M.S. 4 Conc.of M.S.D.)/2 <br /> Laboratory Director 1120951KE1 e16> <br />