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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> V.�}'vy..4,n <br /> RESNA Industries V wh Client Project ID Arco #2130, Stockton <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Jay Johnson OC Sample Group 211-0476 Reported Nov 30, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- STLC <br /> Benzene Toluene Benzene Xylenes Lead Cyanide Sulfide <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 EPA 9010 EPA 9030 <br /> Analyst Chiaravalloti Chiaravallots Chiaravalloti Chiaravalloti D Ballard k Sawa K Follett <br /> Reporting Units mg/kg mg/kg mg/kg mg/kg mg/L mg/kg ing/kg <br /> Date Analyzed Nov 24, 1992 Nov 24 1992 Nov 24, 1992 Nov 24, 1992 Nov 25, 1992 Nov 23, 1992 Nov 24 1992 <br /> OC Sample # 211-0351 211-0351 211-0351 211-0351 211-0478 211-3227 211-2546 <br /> Sample Cone . N D N D N D N D N D N D N D <br /> Spike Cone. <br /> Added. 020 020 020 040 2 0 10 1300 <br /> Cone. Matrix <br /> Spike 0 16 017 017 034 2 1 10 1500 <br /> Matrix Spike <br /> %Recovery: 80 85 85 85 105 100 115 <br /> Conc.Matrix <br /> Spike Dup : 0 17 0 18 018 037 2 0 98 1400 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery- 85 90 90 93 100 98 108 <br /> Relative <br /> %Difference: 61 5 7 5 7 85 4 9 2 0 69 <br /> IOSEOUOIA ANALYTICAL %Recovery Cone of M S -Cone of Sample x 100 <br /> u/, wlz ,� /� Spike Cone Added <br /> (rte <br /> Relative%Difference Cone of M S -Cone of M S D X100 <br /> Michael R Galles (Gone of M S + Cone of M S D)/2 <br /> Laboratory Director <br /> 2110476 RES <5> <br />