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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> ..... ............... <br /> .... .. <br /> 1 r <br /> q111V 0 .. .. <br /> ..RESNA-Escalon tient Project 10: W060 IC Banner Island O.C. Sample Dates <br /> (units): EPA 8240 (ug/L purged) <br /> 1710 Main Street Method <br /> Escalon, CA 95320 Analyst(s): M.Wliliams <br /> ,- <br /> QC Sample#: <br /> ;;Attention: Bill Channell BLK081792 Analyzed: Aug 17, 1992 <br /> Reported: Aug 20, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Conc. Matrix Spike <br /> Conc. Spike Matrix Duplicate Relative <br /> Sample Spike Conc. Matrix % Spike % % <br /> Analyte Conc. Added Spike Recovery Duplicate Recovery Difference <br /> 1,1-Dichloro- N.D. 50 49 98 49 98 0.0 <br /> ethene <br /> Trichloroethene N.D. 50 43 86 44 68 23 <br /> Benzene N.D. so 46 92 47 94 2.2 <br /> Toluene N.D. 50 45 90 45 90 0.0 <br /> Chloroberizene N.D. 50 45 90 45 90 0.0 <br /> ............. <br /> SEQUOIA ANALYTICAL %PAco~Ir no.of Kg- <br /> . of Sam i 100 <br /> Spike Cone.Added <br /> soiat"%Difference:ccanc�of M.S.-Cam-of M.S.D. X 100 al� ( nc.at P.S. + �nc.of M.S.D.) 2 <br /> qria ee 2081370.WAT <14> <br /> ct Manager Man/ager <br />