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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive Redwood City, CA 94063 <br /> NO (415) 364-9600 • FAX(415) 364-9233 <br /> RESt A aient Project ID. W047513,Weber Point <br /> 1710 Main Street <br /> Escalon, CA 95320 ;� <br /> �Attentlon Ti <br /> �- na Le Page CC Sample Group- 2061861-2 R ed: Jun 16, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE EVr* <br /> Benzene Toluene benzene xylenes <br /> Method. EPA 8020 EPA 8020 EPA S020 EPA 8020 <br /> Analyst: M NPP M.h6pp M NPP M.NPP <br /> Reporting Units ug/L PgA Pe/L ug/L <br /> Date Analyzed Jun 11, 1992 Jun 11, 1992 Jun 11, 1992 Jun 11, 1992 <br /> CC Sample# GBLK061192 GBLK061192 GBLK061192 GBLK061192 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> Sample Cone.: N D N D N D N D. <br /> Spike Cone. <br /> Added: 10 10 10 30 <br /> Cone. lWatrix <br /> Spike: 10 10 10 31 <br /> Matrar Spike <br /> %Recovery: 100 100 100 iO3 <br /> Cone. Matft <br /> Spike Dup.: 11 11 11 32 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 110 110 107 <br /> Relative <br /> %Difference: 95 95 95 32 <br /> SEQUOIA ANALYTICAL %f4ecovery, Conc of M S -Conc of Sample tt 100 <br /> Spike Conc.Added <br /> � <br /> Relative 9f,Difierance Conc of M S -Conc of M S.D tt 100 <br /> Conc of M S + Conc of M aD 2 <br /> P oject Manager 2061861 WAT c2� <br />