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� SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX(415) 364-9233 <br /> FMe.x m�+Za+m• r+r� ""x`r'.�,�w.,V+.vey�xncvmro- 1G b�r ZT,T n'.';Yr�xa;[n++r rw�fC'o"aeAfi Yv47 hS"N;n S.S SM?CCo,Yc,`k•u"kY1,'G4d:KcamAw""ax <br /> .w > N t _ i .:,,at�,c9,3�s+•��v,r`.,.,.,cw`Sxx-. >:w,..nwFa.cr <br /> J�+vrr `]1�'Ii rn ]Sn rM++str�.ek.JrSe Wb}"iS 14^'SwW�rN v�9- 3brFS:-0 .S.}Y.v.LCr,4iFF � ABY iY APn: .�rv4 h <br /> <RESNA Client Project ID W0475, Weber Point <br /> of <br /> 1710 Main Street <br /> Escalon, CA 95320 Y <br /> 'Attention Tina La Page OC Sample Group 2064546-8 Reported Jul 1, 1992 <br /> r{ s,A`•.nrh�n ,,.; ~' v r,.-.,n-.�. rl v v „ v v..,� „- .vvv.Fn•�r vcw. sv fY $ "n++rt^^+x Y^n^^<nsc�Y w <br /> ,.vj, rfionr•^v�Y;r, <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene ? ones <br /> ' Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst M Mpp M Mpp M Nipp M Nipp <br /> Reporting Units pg/L pg/L pg/L pg/L <br /> ' Date Analyzed Jun 26, 1992 Jun 26, 1992 Jun 26, 1992 Jun 26, 1992 <br /> OC Sample# GBLK062692 GBLK062692 GBLK062692 GBLK062692 <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. 6 aftn <br /> Spike. 94 94 95 28 <br /> ' Matrix Spike <br /> %Recovery: 94 94 95 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: 62 62 51 10 <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relabve%Difference Conc of M S -Conc of M S D x 100 <br /> ria (Conc of MS + Conc of M S D) 2 <br /> roject Manager 2064WWAT <4> <br />