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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364.9600 FAX (415) 364.9233 <br /> :xHf. Rr,>... R.?:2=:i��.:�•� fnusyl.:.'i }', }', i l {�. s:ji•{�!'?2. 'y`Y::' ; 4ii,. <br /> +51" X .>.»}7•i'�.3�Si'ir'i«�'>:��:y�i�ie�aa ::y'Yaa•.4.::n..,..u'st,�sL..Nf,'' sb..:.>....o•.�r...�.o.s:..�..,s:E.:':..a..,�:.s:>:,�.:.'.....s.a�.u•�;3as,afro :. >�:.s=u>:•.rS.� zf�a <br /> Waterwork Gient Project 10: #426, Falcon Hess Cleaners <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Attention: Sample Bill Channell QC Sa ple Group 10135893597Reported: <br /> Fe..#. .. ,�>r,;3r:'�:?rr7.?;�'xM"''?>� :gay>r>,:aa>???n�•^•.w.•� :^r, �, : ...: -.. ......... ...........,.:::«.�.,.!. ,�.i'.k'"�`. . <br /> 'u. w'.!i1a�. :>n::.xw:.•.e!.x::::;.w..a. „ ..:..: k c :r,.,,., .., :..':.. - <br /> !: <br /> 1 <br /> 1991 <br /> � <br /> yu;c� R: .� <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl xylenes <br /> Benzene <br /> EPA 8015/ EPA 8015/ <br /> Method: EPA 8015/8020 EPA 8015/8020 8020 8020 <br /> Analyst: E.Hamilton E. Hamilton E. Hamilton E. Hamilton <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Feb 11, 1001 Feb 11, 1991 Feb 11, 1991 Feb 11, 1991 <br /> QC Sample #: 102-0118 102-0118 102-0118 102-0118 <br /> Sample Cone.: N.D. N.D. N.D. N..4Wplke Conc. <br /> Added: 0.40 0.40 0.40 1.2 <br /> Cone. Matrix <br /> Spike: 0.26 0.28 0.28 0.81 <br /> Matrix Spike <br /> % Recovery: 65 70 70 68 <br /> Conc. Matrix <br /> Spike Dup.: 0,28 0.30 0.30 0.68 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 70 75 75 73 <br /> Relative <br /> %Difference: 7.4 6.9 6.9 8.2 <br /> SEQUOIA ANALYTICA %P+soovery. Conc.of M.S. •Conc.of Sam le x 100 <br /> Spike Conc.Added <br /> 2lative% Difference: Cone.of M.S.•Conc,of M.S.D. x 100 <br /> t�W. HackWl Conc.of M.S. 4. c.of M.S.D. 2 <br /> P oJect Manager W13589.WAT <3> <br />