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SEQUOIA ANALYTICAL <br /> -, 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364.9600 FAX(415) 364-9233 <br /> RESNA-Escalon <br /> Client Project 10: W0602 IC, Banner Island <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> :,Attention: B11 Channell OC Sample Group: 2081370-78, - 1679 Reported: Aug 1992 <br /> v W:Sii':.>i:"ntiw'.vYv:v.J<i..w.r.JOw?iYAiO:C4?l'.CL]J�+4w06'�i%JLiGO{O�Nw>iTiS:Yh>'J4viiWH: '«4'wvti tvi:i <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Mercury Thallium Barium Beryllium Cadmium Chromium Cobalt <br /> Method: EPA 245.1 EPA 2792 EPA 240.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 <br /> Analyst: J.Martinez J.Nelson C.Medefesser C.Medefesser C.Medefesser C.Medefesser C.Medefesser <br /> Reporting Units: mg/L mg/L mg/L mg/L mg/L mg/L mg/L <br /> Date Analyzed: Aug 13, 1992 Aug 19, 1992 Aug 19, 1992 Aug 19, 1992 Aug 19, 1992 Aug 19, 1992 Aug 19, 1992 <br /> CC Sample #: 208-1679 20&1372 208-1679 208-1679 208-1679 208-1679 208-1679 <br /> Sample Conc.: N.D. N.D. 0.57 N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.0020 0.50 1.0 1.0 1.0 1.0 1.0 <br /> Conc. Matrix <br /> Spike: 0.0020 0.53 1.6 0.97 0.92 0.92 0.93 <br /> Matrix Spike <br /> % Recovery: 100 106 103 97 92 92 93 <br /> Conc. Matrix <br /> Spike Dup.: 0.0020 0.57 1.5 0.91 0.87 0.88 0.88 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 114 93 91 87 88 88 <br /> Relative <br /> % Difference: 0.0 7.3 6.5 6.0 5.6 4.4 5.5 <br /> SEQUOIA ANALYTICAL %RecoveryConc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.ACded <br /> projiecLt <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D.e "100 <br /> (Conc of M.S. + nc.of M.S.D.)/2 <br /> Manager 2081a7o.WAT <15> <br />