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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> 4i.x xvr h <br /> Y"fiv vY }n nt 4 <br /> RESNA Industries VYClient Project ID Arco#21}68, Stockton } <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven CC Sample Group 204-0711 Reported Max 13, 1992 <br /> 4n.}`Y~ry 4S v r7vr r . r vwn v * r. r . .r.rr ' r •} v )v uJ♦ • n rry ` ..? v r r .»n r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Hexavalent <br /> Zinc Lindane Heptachlor Aldrin D3eldnn Chromium Diesel <br /> I <br /> EPA <br /> Method EPA 6010 EPA 8080 EPA 8080 EPA 8080 EPA 8080 EPA 7196 8015 Mod <br /> Analyst S Foster R DiMaio R DiMaio R DiMaio R DiMaio S Foster Chiaravailob <br /> Reporting Units mg/kg ppb ppb ppb ppb mg/k9 ppm <br /> Date Analyzed May 6, 1992 May 6, 1992 May 6, 1992 May 6, 1992 May 6, 1992 Apr 30, 1992 May 6, 1992 <br /> OC Sample # 204.0617 BLK050592 BLK050592 BLK050592 BLK050592 204-0711 BLK050692 <br /> Sample Cone.: 87 N 0 N D N D N D N D N D <br /> Spike Cone. <br /> Added: 50 25 25 25 10 50 15 <br /> Cone Matrix <br /> Spike: 136 24 25 24 98 38 14 <br /> Matrix Spike <br /> %Recovery- 98 96 100 96 98 76 93 <br /> Cone. Matrix <br /> Spike Dup.. 131 24 27 25 10 37 13 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 88 96 108 100 100 74 87 <br /> Relative <br /> %Difference: 38 00 77 41 20 27 67 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br />. SEQUOIA ANALYTIC A %Recovery Cone of M S -Cone of Sample x 100 <br /> 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)Z 2 <br /> Laboratory Director <br /> 2040705 RES ea 12> <br />