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ab i �. cr. +��"P "]'...�"a - "`-�r �� ^. - �� t i.. +�+.rx'�`'"tu^y'3Ts � -. w. _!�.;ix1'�• <br /> - _ �y,�°'�"ar' `C.;i i�i�� ����r.. *� ..,y+�}a.a� �.�' :`nsN,N, +�" w*.y_ .ai' .x,F�W e l tiw�•+ s. ,.. .2; L� `,'v^', t <br /> ase <br /> SEQUOIA ANALYTICAL <br /> 580 Chesapeake Drive Redwood City,CA 94063 <br /> Iwo (415)364.9600 • FAX(415)364-9233 <br /> Delta ErlvironmenlatConsultants Client Protect ID: #40.88-586/Charter Way'b,.'lli S'-ackton <br /> P-3330 Data Drive <br /> "Rancho Cordova,CA 95670 <br /> Attention Hal Dihm CC Sample Groep 108-02959 <br /> Reported Aug 9,, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Benzene Toluene Ethy'Ibenzene Xylene <br /> Method: EPA 8020 EPA 8024 EPA 8020 EPAS020 <br /> Analyst: D.Dreblow D.Dreblow D,Drebfow D.Dreblow <br /> Reporting Untls: ng ng ng ng <br /> Data Analyzed: Aug 7, 1991 Aug 7, 1991 Aug 7, 1991 Aug 7, 1991 <br /> QC Sample#: GBLK080791 GBLK080791 GBLK080791 GBLK060791 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 10 10 10 30 <br /> Conc.Matrix <br /> Spike: 9.8 9.8 9.7 29 <br /> Matrix Spike <br /> %Rerovery: 98 98 97 97 <br /> Conc.Matrix <br /> Spike Dup.: 9.7 9.7 9.6 29 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 97 97 96 97 <br /> Relative <br /> %Difference: 1.0 1.0 1.0 0 <br /> SEQUOIA ANALYTICAL %Recovery: Gonc.of M.S. Gono,of Sarnple x 100 <br /> y ` Sp"Cone.Added <br /> =�� Relative%Dilfarence: Cone.of M.S.-Cort.of M.S.D. x 100 <br /> Maiie NicBimey Sprint ei I (E-4)nc,of E&+Conc.of M.S.D.)/2 <br /> Project Mar:ager —— 1n13ozss.DLr <4> <br />