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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 - FAX (415) 364-9233 <br /> 2f :S'+Tbbs.:P. ` 4 .. r .. „xx. • „ .v. 5- <br /> R ------ <br /> ESN A pWrit Project ID. W0623, Falcon Fre Station#2 <br /> ' 1710 Main Street <br /> v Escalon, CA 95320 <br /> sAttentfcn: John Lane OC Sample Group- 205-1798 Reported: May 26, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> n <br /> ANALYTE 1„exavaleat <br /> ' Cadmium Chrorruum Lead NickelTine Chromium <br /> Method- EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7196 <br /> Analyst: C Medefewer C.Medefener C Medefesser C Madefeuer C Medefewer V Ankaibs <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed. May 14, 1992 May 14, 1992 May 14. 1992 May 14, 1992 May 14, 1992 May 13, 1992 <br /> OC Sample#: 205-1512 MS-1512 205.1512 205-1512 205-1512 205.1798 <br /> Sample Cone.: N.D 81 18 74 100 N D. <br /> 1b Spike Cone. <br /> Added: 500 S00 100 500 S00 so <br /> Conc. Matrix <br /> ' Spike: 450 520 110 500 550 S5 <br /> Matrix Spike <br /> %Recovery: 90 88 92 85 90 110 <br /> Cone. Matrix <br /> Spike Dup.: 460 520 120 500 550 S4 <br /> Matrix Spike <br /> ' Duplicate <br /> % Recovery: 92 88 102 85 90 108 <br /> Relative <br /> % Difference: 22 00 8.7 00 0.0 is <br /> ECUCIA ANALYTICAL %Recovery Cone of M S.-Cone of Sample x 100 <br /> Spike Cone Added <br /> � <br /> Relabw%Drfference Cone of M S -Cone of M S 0 x 100 <br /> Lie (Cane.of M S + Cone of M S 0)/2 <br /> rolect Manager W51798 wAT <8> <br />