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SEQUOIA ANALYTICAL <br /> 49 Z <br /> 819 Striker Avenue Suite 8 e Sacramento CA 95834 <br />' (916) 921-9600 + FAX (916) 921-0100 <br /> RESNA ndustnes Client Project ID Arco#2076, Lodz <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Jay Johnson QC Sample Group 210-0500 Reported Oct 22, 1992 <br /> QUALITY CONTROL DATA REPORT <br />' ANALYTE TCLP TCLP TCLP TCLP <br /> Benzene Toluene Ethylbenzene Xylenes <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst M Nipp M Nipp M Nipp M Nipp <br /> Reporting Units Mg/L Ng/L ug/L ug/L <br /> Date Analyzed Oct 20, 1992 Oct 20, 1992 Oct 20, 1992 Oct 20, 1992 <br /> QC Sample# BLK102092 BLK102092 BLK102092 BLK102092 <br /> MS/MSD MS/MSD MS/MSD MS/MSO <br /> Sample Cone.: N D N D N D N D <br /> i� Spike Cone <br /> Added: 10 10 10 30 <br /> Cone Matrix <br /> Spike. 10 10 10 30 <br /> I <br /> Matrix Spike <br /> % Recovery- 100 100 100 100 <br /> Conc. Matrix <br /> Spike Dup. 10 99 10 30 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 100 99 100 100 <br /> Relative <br /> % Difference- 00 10 00 00 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> ' /,�/f //� Spike Conc Added <br /> �G/ L c� Relative%Difference Conc of M S -Cone of M S D x 100 <br /> Michael R Giles (Conc of M S + Conc of M S D)/2 <br /> Laboratory Director <br /> 2100500 RES <6> <br />