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SEQUOIA ANALYTICAL <br /> 680 Ch q <br />• Chesapeake Drive • Redwood City, CA 940fi3 �, <br /> (415) 364-9600 FAX(415) 364-9233 <br /> ...... ...r...........:....8.:.....r..................... ............:..v.v.:.vn.vn.:r.v,vv:.v......v.......v.:v..v:..:.v'.v...:':::::........... <br /> :...vv:,.:. � .....-::::.u.:.v::nv.:v.v:.v::..v:::•,u.v:,v,s.;...:.....................................::::::�:.v.:v::..:::.,...................:.:::::.�:::. <br /> .v.....,......r...............n.:..:......:.......>..:::r.:•::.v.....rc:.v:...r.�::::.�:.vr:::.vnvr::.::......,.}.:.}:.}}:ii{:.::'}:ti'::._:::.�::::..:............................r................:}.:..::::•::::.v::.vnv.:v::.v:::.•;:,v... <br /> €€WWt rwork Client Project ID: #490,Thorpe/We4erAve!a i <br /> 1710 Main Street Il <br /> 'Escalon, CA 95320 ! <br /> �Attentlion: Bill Channell QC Sample Group: 104-1933 I ;,i Reported: May 8, 1991 <br /> :}}:.}:v}}::.::i: <br /> 1.nvn..................�•::F.in.:.n...nn.:....................: <br /> QUALITY CONTROL DATA RERORT, , <br />{ F <br /> ANALYTE <br /> Lead i) i <br /> Method: EPA 239.2 <br /> Analyst: N.Herrera <br /> Reporting Units: mg/L <br /> I <br /> Date Analyzed: May z, 1991 I' I <br /> QC Sample#: 104-19M ;l a <br /> i <br /> I <br /> Sample Conc: 0.092 <br /> Spike Conc. <br /> Added: 0.10 <br /> Conc. Matrix <br /> Spike: 0.22 <br /> Matrix Spike <br /> %Recovery: 130 <br /> Conc. Matrix i! E <br /> Spike Dup.: 0.20 � <br /> f <br />' Matrix Spike <br /> 1 <br /> Duplicate I r <br /> %Recovery: 110 <br /> Relative <br /> %Difference: 9.5 j <br /> 5 <br /> E I <br /> SEQUOIAANALYTIC L %Recovery: Conc.of M.S.-Conc.ofifSample x 100 4 <br /> Spike Cone.Added I <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 ' <br /> Vzabeth W. Hac I (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> t Manager ({ 1041933.WAT <3> { <br /> l <br /> J <br /> 1 <br />