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�1 <br /> ` SEQUOIA tAN4063 <br /> oALYTIgCAL City, <br /> (415) 364-9600 a FAX(415) 364-9233 <br /> Waterwork Olent Project ID W0475, Weber Point <br /> 1710 Main Street <br /> Escalon.CA 95320 � <br /> Attention Tina Le PaGe QC Sample Group: 204-5283 Reported. Apr 30, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE myl- <br /> BNnzene Toluene benzene xylerm <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: M Mpp M Mipp M Nipp M Mpp <br /> Reporting Units: Pg/L Pg/L pg/L Pg/L <br /> Date Analyzed: Apr 29. 1992 Apr 29, 1992 Apr 29, 1992 Apr 29. 1992 <br /> OC Sample#- GBLK0429M GBLK042992 GBLK042992 GBLKD42992 <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.Matriu <br /> Spike: 11 12 12 35 <br /> Matrix Spike <br /> %Recovery: 110 120 120 117 <br /> Conc.Matrix <br /> Spike Dup.: 11 12 11 35 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 110 120 110 117 <br /> Relative <br /> %Difference: 00 00 87 00 <br /> * SEQUOIA ANALYTICAL %FW covert Conc of M.S -Conc of Same X 100 <br /> Spike Conc.Added <br /> ,� Relathm%Difference Conc of M S.-Co —nc.of M.S.D. X100 <br /> (Cone of M S. + Conof M S,D 2 <br /> Foe Manager 204s2s3.wnr <2, <br />