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. R • r <br /> i <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> an+c 7c airfi>,cc^tt�- avpw.w..t..,yN,a)ypgt.caq.�axfx�J aa'atcn„2orro;;,^^�r.caa',r;�r4 a.r,yl.�+t k>"`x�`�'}krrS4 w].+r s�w�N.aaerrS r.5rcc..w vasT.i { --°4 ., <br /> ' ,arta`rr�c',Yrx �aa'h`tac9'i.W�2nt:ww ' �%�� ds�xtm„xc'.�.u,c',rm r�aTxmpv..m�tcc rowroo-�Sow:Prlf,'�Ycx�.4.2�� ¢� <br /> %RESNA Client Project 1D W0475 i3,Weber Point N <br /> 1710 Main Street <br /> Esca[on,CA 95320 r <br /> zAttentlon. Tna Le Page CC Sarnpie Group: 208-1856 Reported+Aug 14, 1992 1 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: M Nipp M_MPP M Nipp M MPP <br /> Reporting Units frg/L yg/L ug/L ug/L <br /> Date Analyzed Aug 13. 1992 Aug 13, 1992 Aug 13, 1992 Aug 13, 1992 <br /> OC Sample# GBLK081392 GBLK081392 GBLK061392 GBLK081392 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <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: 11 11 11 33 <br /> Matrix Spike <br /> %Recovery: 110 110 110 110 <br /> Conc. Matrix <br /> Spike Dup.: 11 11 11 33 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 110 110 110 110 <br /> Relative <br /> %Difference: 00 00 00 00 <br /> lSEQUOIA ANALYTICAL %Recovery- Conc of M S .Conc of Sample x 100 <br /> Sprke Conc Added <br /> ""�� �a � Relative%Difference Conc of M S -Conc of M S D x 100 <br /> L (Conc of M S + Conc of M$D) 2 <br /> roject Manager 2081856 wAr c2> <br />