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SEQUOIA ANALYTICAL. <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> c `<nf4i:X�a a'�axaaiaca� a,��.�.3f:Yn' .dl. `i..,',.vc::�RESNA pieist Prosect ID W047S 13,Weber Point <br /> .A 1710 Main Street <br /> Escalon, CA 95320 4` <br /> ,Attention Tina Le Page OC Sample Group 208-3589 Reported: Aug 26, 1M - <br /> tww.r-^^^ 2 -, "^,,..' '�^v,'.c >r..... +�+wJ v,:,�.s. <br /> i.� S,�x',r,...n r.o-zrvr$.:�r: .i x�C E <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xytenes <br /> Method EPA 8020 EPA 8020 EPA 5020 EPA 8020 <br /> Analyst. M Nipp M.Mpp M Nipp M Nkpp <br /> Reporting Units: Pg/L pig/L w9/L N9/L <br /> Date Analyzed Aug 22. 1992 Aug 22. 1992 Aug 22, 1992 Aug 22, 1992 <br /> OC Sample#. GBLK082292 GBLK082292 GBLK082292 GBLK082292 <br /> Sample Conc.: N D N D N D N D <br /> Spike Conc. <br /> Added: 10 10 10 30 <br /> Conc. Mabix <br /> Spike: 10 10 10 30 <br /> Matrix Spike <br /> %Recovery: 100 100 100 100 <br /> Conc. Matrix <br /> Spike Dup.: 10 10 10 31 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 100 100 103 <br /> Relative <br /> % Difference: 00 00 00 33 <br /> ANALYTICAL %Recovery- Cone of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Resat i i e%Difference Conc of M S -Conc of M S 0 x 100 <br /> rracLe (Coni of MS + Cone of M S D)/2 <br /> anager 2053559 wAT <2> <br />