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j SEQUOIA ANALYTICAL <br /> $19 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> iv r.r r}}r`vi{+4{il ray n ri+.i xn n xx r. r yr}v },�nr v fvY 2 v I� 4 xh}•,.vA n Sh r�rr u r+ Gr ur r v tw t n x x..x t vv vr.r.r. x.nx.w wS m ni0"+{tkfr v 4. { <br /> hRESNA Industries Client Project ID Arco#2168, Stockton <br /> -3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven QC Sample Group 2050150-62 Reported May 21, 1992 <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> I Benzene Toluene Ethyi benzene Xylenes Lead <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst C Chapman C Chapman C Chapman C Chapman S Foster <br /> Reporting Units ppm ppm ppm ppm mg/kg <br /> Date Analyzed May 18, 1992 May 18, 1992 May 18, 1992 May 18, 1992 May 12, 1992 <br /> QC Sample # BLK051892 BLK051892 BLK051892 BLK051892 205-0197 <br /> Sample Cone.: N D N D N 0 N D 64 <br /> Spike Cone <br /> Added: 02 02 02 04 50 <br /> Cone. Matrix <br /> Spike: 017 018 018 036 52 <br /> Matrix Spike <br /> %Recovery 85 90 90 90 91 <br /> Cone. Matrix <br /> Spike Dup.- 017 018 018 037 52 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery- 85 90 90 92 91 <br /> Relative <br /> % Difference: 00 00 00 27 00 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTIC %Recovery Cone of M S -Cone of Sample x 100 <br /> �Lt'iG f'G Spike Cone Added <br /> Relative%Difference Cone of M S -Cone of M S D x 100 <br /> Michael R Giles (Cone of M S + Cone of M S D) 2 <br /> Laboratory Director <br /> 2050150 RES <6> <br /> i <br />