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YTiCAL <br /> SEQUOIA ANAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> 14151 364.9600 FAX(415)364.9233 <br /> t <br /> G.S.Technical Enviionmental CGneult, Client Project ID. #90054.03 <br /> `1414 N.Broadway Rd. <br /> .� Tempa,AZ 85282 <br /> f Attention Rov+land Nati QC Sample Group 1114614-13 Reported .:.J <br /> Dec 10 <br /> 1 QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE Diesel Lead <br /> Method: EPAS015 EPA 239.2 <br /> Analyst: A.Les M.Mistry <br /> Reporting}Units: N9/L mg/L <br /> Date Analyzed: Doc 3. 1991 Dec s. 1991 <br /> - QC Sample#: DELK120291 l i l 4618 <br /> 1 -x <br /> 7. <br /> Sample Conc.: N.D. 0.030 <br /> ? ! Spike Cone. <br /> Added: 300 1.0 <br /> f Conc.Matrix <br /> y Spike: 230 0.81 <br /> Matrix Spike <br /> %Recovery: 77 78 <br /> �- Conc.Matrix <br /> f <br /> Spike Dup.: 250 0.83 <br /> i Matrix Spike <br /> Duplicate 80 <br /> %Recovery: 83 <br /> Relative <br /> %Difference: 8.3 2.4 <br /> •SEQUOfA ANALYTICAL 9s Recovery: Conc.of M.S.•Conc.of Sample x t00 <br /> Spike Conc.Added <br /> 1 <br /> �� �_.���, yY•��� •, Relative�(+DiNerence: Conc.of m.6.•Conc.of M.S.D. x t <br /> 00 <br /> —- 'Made A.-Springer__ Icon.of M.s. +Conc.of M S D.1/2 <br /> _�_— — - 1114614.UST—a 8 -- <br /> 1 t Project Manager <br /> j <br />