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NORTH <br /> =CREEK <br /> - = ANALYTICAL <br /> 18939 120th Avenue N E,Suite 101 •Bothell,WA 98011-2569 <br /> Phone (206) 481-9200•FAX (206) 485-2992 <br /> ,,.,»evc <br /> 'Steffen Robertson& Kirsten Client Project ID Diamond Lumber#32504 22 Analyst D Vandel <br /> k�15311 NE 90th Street Method EPA 7421 <br /> Redmond,WA 98052 Sample Matrix Water Digested Apr 10, 1992 <br /> Attention Dave Schwieger Units ug/L Analyzed Apr 28, 1992 <br /> `N.rove}:r R ba n}a roi3R;J'2S:s vn r ev.\S.4V4w}aAyv.} uS.\v\.2Va3.`.a8o aon., nv ry ry ryn .M.� \ayvn Le.n.�x+,ry .-d.Lw"..�.a'h$Q`Q'X\•t`Swr�34or6 'h.rynraxrl @? x" "'r'r'q „�.";c"'ct'', iz3' 1992QC Sample # BLK041092 Reported Apr 29, 1992 <br /> QNr?,{`J" Za � A "w <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Pb <br /> ' <br /> Sample Conc ND <br /> 1 Spike Cone <br /> Added 30 <br /> Conc Matrix <br /> Spike' 30 <br /> Matrix Spike <br /> %Recovery: 100 <br /> Conc. Matrix <br /> ' Spike Dup 26 <br /> ' Matrix Spike <br /> Duplicate <br /> % Recovery 87 <br /> Relative <br /> % Difference 14 <br /> 1 <br /> ORTH CREEK ANALYTICAL me %Recovery Conc 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 /> S Cocanour (Conc of M S + Conc of M S D)/2 <br /> ' Laboratory Director <br /> 2040434 SRK <0 <br />