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i <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> f= <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> ..............�.....�....: .-..:. .:. ...... .................�....::,.:.:...:..:.,..,..:..:�..:..�....:.:::..:;.:.:;..� :vim}:;:.::v.r. ��,.0 <br /> .,,;........... ...:}:n{:.-}}::{v:v{:{.:,.:,..>v...::.....:.:.:..:..4•:�}.,nom.<: .:v.,:}:. <br /> o-.............. .......�......c:.:....:,:�::x...v,:r.�::::::..........:...:..::.:..:..:.::.:...rti:.:.•.:r:�.,�:: <br /> RESNA Client Project ID: W0195.00,Western Stone Products/Trac <br /> y xti <br /> 1710 Main Street <br /> „Escalon, CA 95320 <br /> .,Attention: Grea Stahl CC Sample Group 2101840-1 <br /> :..,......._...:.v.:.....:.:...O...Of.:..}..'...:.}::.r:..:..}..r..................r.......:...:...�............,.}...........u...:.....4..n......::..�.}....:..f.:'}.:..:h...dC}..:..:...O-...J.:?::.4.}-.n4x..x.vx-x:.r:.::-:.x.:::. :.......-.. ...:A.....:.....:..:..:...::..:•.::.r:}:.:i..h:.:.:.::.4:-:}.r::...:..:..:..:.::.�...r....:rx.r.r:.�...>..v.:...:-...:}..n.....,..........}......>.:,.....:..:...,.:.:....J....v..}.:.i:.:.::...{:.:nn.:.,}v.::�.�.:��..-,r.\.�r.;� ^'`.- <br /> epYx?x^oryr <br /> vr.tre...'d�-.. <br /> .....u..4hOct <br /> 0..G:1-.� 1992.. <br /> :x:::i:::::;....:. . <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.Nipp M.Nipp M.Nipp <br /> Reporting Units: erg/L Ng/L pg/L erg/L <br /> Date Analyzed: Oct 16, 1992 Oct 16, 1992 Oct 16, 1992 Oct 16, 1992 <br /> CC Sample#: GBLK101692 GBLK101692 GBLKIDIS92 GBLK101692 <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: 9.9 9.9 9.9 30 <br /> Matrix Spike <br /> %Recovery: 99 99 99 100 <br /> Conc. Matrix <br /> Spike Dup.: 10 10 9.9 30 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 100 99 100 <br /> Relative <br /> %Difference: 1.0 1.0 0.0 0.0 <br /> SEQUOIA ANALYTICAL -%R000very: Cone.of M.S. Conc.of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> (Conc.of M.S. + Canc.of M.S.D.) 2 <br /> roject Manager 2101840.wAT <8> <br />