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;:. <br /> j <br /> SEQUOIA ANALYTICAL RECEIVED MAY 310 <br /> 680 Chesapeake Drive • Redwood City,CA 94x63 <br /> (415)364-9600 FAX(475)364.9233 <br /> Client Project iD:taeeves Ei=rk 388 - <br /> " �1 1710 710 Main <br /> n Street <br /> —qEscalon.CA 85320 <br /> ;Attention: BIUi Channell QC Sample Grou :104-2984 :: <br /> Reported:May 1. 1991 <br /> DUALITY CONTROL DATA REPORT <br /> - al+iALY7i; <br /> Benzcn� Toluene Bsn:enq ,�y <br /> • Method: FPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: S.Haffmann S.Hoffmann S.Wfmann S Hoffa ann <br /> Reporting Units: ng n <br /> Date Analyzed: Aar ie. 1991 Apr 18e 1991 nQ n0 <br /> QC Sample#: Gt3LtSO41891 Apr 18, 1991 Apr 18, 1991 <br /> GBLK041a91 G13LKD41891 G13LK041891 <br /> r-; <br /> s: Sample Conz.: N.D. N.D. N.D. N.D. <br /> Spike Cone. <br /> Added: 1t70 100 100 300 <br /> Conc.Matrix <br /> `- Spike: 100 100 700 300 <br /> Matrix Spike <br /> %Recovery: 100 100 100 100 <br /> Conc.Matrix <br /> r Spike Dup.: 100 100 100 300 <br /> _ Matrix Spike <br /> Duplicato <br /> -%Recovery: !QO 100 100 100 <br /> Relative <br /> -- --- — -Difference:- -- -- 0.0--- -- ---0 0 ----- 0.0 0.0 ------- ---------- ----- -- <br /> cEQUO'A ANALYTICAL x f co�ery: Conc.ut M.S.•Cona of Sample x 100 <br /> /1 Spliu Cone.Added <br /> + �^ Ralatir�7G t7iffuen r <br /> /�i� C Cone.of M.S.-Cone.of <br /> _ E za eth VY.�Hac�Ct � M.s.o. X too <br /> � ��rojeCI Managerit ene a!M.S, r Cone.at WS.G.t z <br /> _. 1042M.WAT i9s <br />