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SEQUOIA ANALYTICAL <br /> $19 Striker Avenue, Suite 8 • Sacramento CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> i <br /> v�`�$.�vC.hcC ^}>Y.} mac. ,,.,.,k,.cx„ryJ,,'4`'uY,r.9vwF,w2$.R2�.".� '�'d^•.ct�.,Ao' o > wAc.......:`�Y.�kw..dk.o.s.,,...,. ,..R,. ..bd a'a.�ti 24ry vo.,. <br /> RESNA Industries Client Project ID #30003-8,Arco, Stockton <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Matthew Taylor OC Sample Group 2100314-19 Reported Oct 16, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> I Benzene Toluene Ethylbenzene X ones <br /> Method EPA 8024 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst Chiaravallott ChlaravallaL Chiaravalloti Chiaravalloti <br /> Reporting Units mg/m3 mg/m3 mg/m3 mg/m3 <br /> Date Analyzed Oct 13, 1992 Oct 13, 1992 Oct 13, 1992 Oct 13, 1992 <br /> QC Sample# BLK101392 BLK101392 BLK101392 BLK101392 <br /> Sample Cone.. N D N D N D N D <br /> Spike Cone. <br /> Added: 2 0 2 0 2 0 40 <br /> Cone. Matrix <br /> Spike: 16 16 16 35 <br /> Matrix Spike <br /> % Recovery: 80 80 80 88 <br /> Cone. Matrix <br /> Spike Dup.: 16 1 7 17 38 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 80 85 85 95 <br /> Relative <br /> %Difference: 0 0 61 61 82 <br /> SE000IA ANALYTICAL %Recovery Cont of M S -Cone of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Michael R Giles (Cont of M S + Cone of M S D) 2 <br /> Laboratory Director <br /> 2100314 RES e2> <br />