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f � <br /> r <br /> SEQUOIA ANALYTICAL J u j_ 17 <br /> 1900 Bates Avenue • Suite LM • Concord, Calolernia 94520 L <br /> (4151 6869600 ° FAX(4 15)696.9689 <br /> Kaprealian Engineering,Inc. Client Project ID: Unocal,eat E.::etileman Lana,Lodi <br /> P.O.Box 9% <br /> Benicia,CA 94510 Reported: Afar 21, 1991 <br /> Attention: Mardo Kaprealian,P.E. QC Sample Group: 1030591.95 P <br /> QUALITY CONTROL DATA REPORT <br /> Ah ALYTE Ethyl <br /> Benzene Toluene Benzene Xylenes <br /> Method: FPA8015/B020 EPA8015/8020 EPA(i015/8020 EPA8015/8020 <br /> Analyst. E.Hamilton E.Hamilton E.Hamilton E.Hamilton <br /> Reporting Units: fig/kg Pg/k0 pg/kg p9/kg <br /> Date Analyzed: Mar 20, 1991 Mar 20, 1991 Mar 20, 1991 Mar 20, 1991 <br /> QC Sample#: 1034D591 103-0591 103-0591 103-0591 <br /> Sample Conc: 0.57 0.91 0.066 0.73 <br /> Spike Conc. <br /> Added: 0.40 0.40 0.40 1.2 <br /> Conc.Matrix <br /> Spike: 0.87 1.4 0.33 1.8 <br /> Matrix Spike <br /> %Recovery: 75 120 66 89 <br /> Conc.Matrix <br /> Spike Dup.: 0.76 1.2 0.32 i.5 <br /> Fix <br /> Matrix Spike <br /> Duplicate <br /> °e Recovery: 48 73 <br /> 64 64 <br /> Relative <br /> °6 Difference: 13 15 3.1 18 <br /> _SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.•Conc,of Sample x 100 <br /> pp Spike Conc Added <br /> l Relative%oifference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Belinda C.Veda (Conc.a1 M.S.+Conc.of M.S.D.) 2 1030591.KEI 44;. <br /> Laboratory Director <br />