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X <br /> -W <br /> r` <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921.9600 • FAX(915) 921-0100 <br /> REMA Indust les Client Project ID:Arca#2130,Stockton,CA <br /> 3154 Gold Camp Drive,Suite 200 <br /> Rancho Cordova,CA 95670 <br /> -: Attention Eloise Frick QC Sample Group 1120480 91 Reported Jan 3, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> e _ <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead <br /> ✓, Method: EPA 8020 EPA 8020 EPA6020 EPA 8020 EPA6010 <br /> Analyst: C.Chapman C.Chapman C.Chapman C.Chapman S.Foster <br /> Reporting Units: ppm ppm ppm ppm mg/kg <br /> 1 r Date Analyzed: Dec 31, 1992 Dec 31, 1992 Dec 31, 1992 Dec 31, 1992 Dec 26, 1992 <br /> QC Sample#: 112.0556 112.0556 112.0556 112-0556 112-0488 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.2 0.2 0.2 0.4 50 <br /> Conc.Matrix <br /> Spike: 0.175 0.186 0.19 0.391 43 <br /> Matrix Spike <br /> %Recovery: 88 93 95 98 86 <br /> t <br /> Conc.Matrix <br /> Strike Dup.: 0.164 0.175 0.179 0.37 42 <br /> i <br /> Matrix Spike <br /> R� . Duplicate l <br /> %Recovery: 82 88 90 92 84 E <br /> Relative <br /> %Difference: 6.5 6.1 6 5.5 2.4 <br /> SEQUOIA ANALYTICAL %Recovery: Conc,of M.S.-Cone.of Sample x 100 1 <br /> Spike Cone.Added <br /> Ralative%Difference: Cane.of M.S..Cane.of M.S.O. x 100 <br /> Michael R.Giles (Conc.of M.S.+Cone.of M.S.D.) 2 <br /> ® Laboratory Director 112048.,Res e6> <br />