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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> g�..w x�rr r ..,. v,c v ,Y.r,.,-:Yc•mss•''�Y, x,n,x }r[ S l ;y x ,9 v <br /> Groundwater+Technology Client Project ID #023201466,Golden Grain,22Moffat,Manteca,CA „x <br /> 4057 Port Chicago Hwy h <br /> Concord, CA 94520 <br /> Attention Chris Desocio OC Ubu Sample Group w2090373µ74 reported Oct 7, 1992%'}r <br /> ...+xtva..:,c+r�-,b.„ v:..v,wwt,v nL.v..v Ntr.+f�• xi+ ,,+i c ,+ .,,.w.r ^rv.w.r ry � r}' t� c .�7'+5.,...sacaw,'r,}x.✓,.,c..J.F awJ,w`�,..,N..Rw <br /> QUALITY CONTROL DATA REPORT <br /> rNALYTE- <br /> Benzene Toluene Ethylbenzene Xylenes Lead <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 EPA 239 2 <br /> Analyst Chiaravalloti Chiaravalloti Chiaravalloti Chiaravalloti D Ballard <br /> rieporbrig Units Fr9/L N9/L N9/L p9/L mg/L <br /> Date Analyzed Oct 2, 1992 Oct 2, 1992 Oct 2, 1992 Oct 2 1992 Oct S. 1992 <br /> OC Sample # BLK100292 BLK100292 BLK100292 BLK100292 209-0372 <br /> Sample Cone N D N D N D N D N D <br /> • Spike Cone <br /> Added 10 10 10 20 0 050 <br /> Conc Matrix <br /> Spike 84 89 87 17 0 057 <br /> Matrix Spike <br /> %Recovery. 84 89 87 85 114 <br /> Conc Matrix <br /> Spike Dup . 87 92 91 17 0 058 <br /> Matrix Spike <br /> Duolicalle <br /> % Recovery 87 92 91 85 116 <br /> Relative <br /> %Difference. 35 33 34 00 1 7 <br /> • SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> / A� Spike Conc Added <br /> i. Reiauve%Difference Conc o1 M S Conc of M S 0 >< 100 <br /> Michael R Giles (Conc c: ft S - Conc of M S 0 i 2 <br /> Laboratory Director <br /> 2090373 GRC <3> <br />