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.8' sts . s e � z -•msst _ -� t," ''=; i -'� ,'t�`a.. = � `- ' ;'.- r �3;� <br /> e <br /> SEQUOIA ANALYMAL <br /> 1900 Bates Avenue a Suite LM a Concord. California 94520 <br /> (415)686.9600 • FAX (415) 6B6.9689 <br /> Kaprealian Engineering,Inc. Client Project lD: Uncal,601 Kettloman Lane,Lodi <br /> P.O.Box 996 <br /> Benicia,CA 94510 Reported.Apr B 1991 <br /> Attention: Mardo Kaprealian,P.E. QC Sample Group: 1040142-159. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene Benzene xylenes <br /> Method: EPA8015/9020 EPA5015/8020 EPA8015/8020 EPA8015/8020 <br /> Analyst: K.Lee K.Lee K Lee K.Lee <br /> Reporting Units: m9/kg mg/k9 mg/kg m9/kg <br /> Date Analyzed: Apr 6, 1991 Apr 6, 1991 Apr 8, 1991 Aar 6, 1991 <br /> QC Sample#: Matrix Blank Matrix Blank Matrit Blank Matrix Blank <br /> Sample Cone.: N.D. N.D. W). N.D. <br /> Spike Cone. <br /> Added: 0.40 0.40 0.40 1.2 <br /> Cone.Matrix <br /> Spike: 0.42 0.40 0.40 1.0 <br /> Matrix Spike <br /> %Recovery: 110 100 100 83 <br /> Cone.Matrix <br /> Spike Dup.: 0.42 0.40 0.42 1.0 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 100 110 83 <br /> Relative <br /> %Difference: 0 0 4.9 0 <br /> SEQUOIA ANALYTICAL t,Recovery: Conn.at M.S.-Conc.of Sample x 100 <br /> Spike CO=Added <br /> Relative%Difference: Conc,of M.S.•Conc.of M.S.D. x 100 <br /> B&lind2 C.Vega (Cant,of M.).+Cont. 2 1040742.KEI c7> <br /> Laboratory Director <br />