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',.QUOIA ANALYTh AL <br /> 680 Chesapeake Drive • Redwood City, <br /> CA 94063 <br /> i (415) 364-9600 FAX(415) 364-9233 <br /> :v:.: ::.'..; {<:.`.uA`' 'aw nc„�yeiv+%e:NMk.,.w...,:y..S:""'.�+••e::ecy:. ;va^` +�, <br /> I Client ProjectAID: W0195.00,Western Stone Products/Tracy <br /> €.1710 Main Street <br /> i Escalon, CA 95320 <br />! ::Attention: Greg Stahl QC <br /> :. - .. . ' Samp..lea:G <br /> - <br /> . ..:a..auL.::�cw.vriaftw.vv:.cG:.:�'.'yx�< if'$:FSRiza��::S:wsu'ol.:..•...:'C�...'roup:.•w. 2101 2-50 U �i <br /> Reported: <br /> C <br /> n '-.aa+wckaDLA•':.1�w64dGtiauS�S. `:Y.`:...:. ... .. ... .:.:.:: .. .:w..w..,:; <br /> i <br /> I I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl EXtraotable <br /> Benzene Toluene benzene Xylenes Hydrocarbons <br /> Method: EPA Soto EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: EJCunanan E.Cunanan E.Cunanan E.Cunanan R Lee <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg Mg/kg <br /> Date Analyzed: Octj 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 13, 1992 <br /> OC Sample#: GBLK101492 GBLK101492 GBLK101492 GBLK1o1492 DBLK101392 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Spike Conc. F <br /> Added: 0.20 0.20 0.20 0.60 j5 <br /> Conc.Matrix E <br /> Spike: 0.16 0.16 0.16 0.48 11 <br /> Matrix Spike <br /> %Recovery: 'I 80 80 80 73 <br /> Conc. Matrix <br /> Spike Dup.: 0,16 0.16 0.15 0.46 11 <br /> Matrix Spike 4 <br /> Duplicate <br /> %Recovery: 80 80 75 77 73 <br /> 'I <br /> Relative <br /> %Difference: 0.0 0.0 6.5 4.3 0.0 <br /> I` <br /> If <br /> SEQUOIA ANALYTICAL %Recovery. Conc.WKS.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> W Relative%Difference: Conc.of M.S.-Conc.of M.S.D. X 100 <br /> rrojie <br /> e (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> Manager 2101840 wA <br />- r <br />