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r <br /> I <br /> sEQUoi - ANALYTICAL <br /> 680 Chesapeake Drive Redwood City, CA 94063 <br /> (415)364-9600 • FAX(415) 364-9233 <br /> RESNA Client Project ID. W0475,Weber Point A <br /> 1710 Main Street <br /> f Escalon, CA 96320 <br /> Attention Tina Le Page QC Sample Group 205-2063 Reported: May 18, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE EMyl- <br /> Benzene Toluene benzene Xylenes <br /> Method: EPA SM EPA$020 EPA 8020 EPA 8020 <br /> Analyst. M Npp M-NPP M Mpp M Mpp <br /> Reporting Units' Erg/L Erg/L pg/L Erg/L <br /> Date Analyzed May 14, 1992 May 14. 1992 May 14, 1992 May 14, 1992 <br /> OC Sample# GBLKD51492 GBLK051492 GBLK051492 GBLK051492 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> Sample Conc: N.D N.D N D N D <br /> Spike Conc. <br /> . Added: 10 10 10 30 <br /> Conc. matrin <br /> Spike: 93 9.2 93 28 <br /> Matrix Spike <br /> %Recovery: 93 92 93 93 <br /> Conc. Matrix <br /> Spike Dup.: 10 10 10 31 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 100 100 100 103 - <br /> Relative <br /> %Difference: 73 83 73 10 <br /> SEQUOIA ANALYICAL %Recovery Conc of M S -Conc of Sample X 100 <br /> Spike Conc Added <br /> ( � a Pafabve%Difference Conc of M S -Conc of M S D u 100 <br /> (Cone of M S + Conc of M S.D)/2 <br /> 0 <br /> ject Manager 2o52os3 wnt <z> <br />