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SEQUOIA i4NAt_YTICAL—SAC. 9169210100 P. 07 <br /> SEQUOIA ANALYTICAL <br /> + 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> ' (916') 921-9600 • FAX (916) 921-0100 <br /> EMCON Associates Client Project IG Shap,820 west CZarw way,Stow <br /> 1433 N Market Blvd <br /> tc-1 mania,CA 95834 <br /> !Attention Sheila KrUse QC Sample Grou 2050012-18 Reported. Ma 18, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> AN Ft,yl. <br /> Benzene Toluene 8enzans Xyienee <br />' Method EPA 5020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst. C.Chapman C Chapman C Chapman C Chapman <br /> Reporting Units. ppm Ppm ppm Ppm <br />' Date Analyzed: May 14, 1992 May 14, 1892 May 14, 1892 May 14, 1982 <br /> CC Sample#- 2=758 205=59 20500758 20500758 <br />' Sample Cone.: N D N D N D N D <br /> Spike Conc. <br /> Added: 001 001 001 002 <br /> Cone. Metrix <br /> Spike: 00093 00089 00097 0 019 <br /> I Matrix Spike <br /> %Recovery: 93 89 97 95 <br />' Cont. Matrix <br /> Spike Dup.: 00094 00091 001 0 019 <br /> M&td x Spike <br />' Duplicate _ <br /> %Recovery: 94 91 100 95 <br />' Relative <br /> %Difference: 1 1 22 30 00 <br /> I <br /> SEQUOIA ANALYTI L %Recovery Coro of M S -Cont Of sample x 100 <br /> Spike Can* Added <br /> Relative%Difference Cone of MS -Cone H M S O 1100 <br /> Michael R Giles (Cone Of M S + Conc of M S 0) 2 <br />' Laboratory Director <br /> 2050412 EUC cS> <br /> 1 <br />