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1,1,:!.11 <br /> Ewa <br /> SEQUOIA ANALYTICAI <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (415) 686.9500 Y FAX (415) 686-9669 <br /> Client Project ID:Unocal,601 E.Ket!leman Lana,Lodi <br /> Kaprea(ian Engineering Inc. 1 <br /> P.O.Box 996 <br /> Benicia,CA 94510 Reported Apr 11,J991. <br /> Attention:Mardo Kaprealian,P E QC Sample Group: 1040290.291 <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> Method: EPABG15/8020 EPA8015/8020 EPAW15/6020 <br /> Analyst: E.H. E.H. E.H. <br /> Reporting Units: mg/kg mg/kg m9/k8 <br /> Date Analyzed: Apr 10, 1991 Apr 10. 1991 Apr 10, 1991 <br /> Sample#: 104-0290 <br /> 10"281 Blank <br /> Surrogate 97 97 <br /> %Recovery: 93 <br /> %Recovery: Cont.01 M.S.•Conc.of SamPia x 700 <br /> SEQUOIA <br /> ANALYTICAL Spika Cone.prided <br /> Relative%Difference' Conc.of M.S.-Cons.of M.S.D. x 100 <br /> (Cont.of M.S.+Go c.of M.S.D.) 2 104029o.Kel 13> <br /> Belinda C.Vega <br /> Laboratory Director <br />