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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 FAX (916) 921-0100 <br />' Raney Geotechnical Client Project ID: #074-013, UPS - North Broadway <br /> 3176 Industrial Blvd. <br /> West Sacramento, CA 95691 <br /> Attention: Mike Gereghty OC Sample Group: 2040080-90 Reported: Apr 17, 1992 <br /> QUALITY CONTROL. DATA REPORT <br /> ANALYTE <br /> Selenium Lead Mercury Chromium vl <br /> Method: EPA 7740 EPA 7421 EPA 7471 EPA 7196 <br /> Analyst: S. Poster S. Foster CKaravakoti Chiaravalloti <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Apr 7, 1992 Apr 7, 1992 Apr 9, 1992 Apr 6, 1992 <br /> QC Sample #: 204-0031 204.0031 204-0022 204-0031 <br /> Sample Conc.: N.D. 3 N.D. N.D. <br /> Spike Conc. <br /> Added: 25 25 0.25 SO <br /> fConc. Matrix <br /> Spike: 26 30 0.24 39 <br /> Matrix Spike <br /> % Recovery: 104 108 96 78 <br /> 1 <br /> Conc. Matrix <br /> Spike Dup.: 26 29 0.22 40 <br /> Matrix Spike <br /> Duplicate <br />' % Recovery: 104 104 88 80 <br /> I <br /> Relative <br /> % Difference: 0.0 3.4 8.-7 2.5 <br /> SEQUOIA ANALrTICAL �^ % Recovery: Cone.of M.S. -Conc.of Sample x 100 <br /> dIj i pike Conc. Added <br /> uo_ , , <br /> Relative% Difference: Conc. of M.S.-Conc.of M.S.D. x 100 <br /> ichael R. Giles (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> Laboratory Director Page 3 of 3 <br /> ' 2040080.RRR <30> <br />