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1 <br /> 4 4�D SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> Jr (415) 364-9600 - FAX(415) 364-9233 <br /> "�n^"..� <br /> ^'�"w' r+'r""y,a"w�r,..""hp.,.w """""; c'+'`,".¢ Y"+°: '_gt"h"0`. yr.. `Ss:'S�o'x'v'"# `^' C ♦ jw:z <br /> zWaterwork Cilent Project ID W0475,Weber Point <br /> 1 1710 Main Street <br /> Escalon, CA 95320 <br /> ' Attention Tina LePage CC Sample Group 2045283 Reporter! Apr 30, 199'1 .r <br /> x--,-= 0 5 ,. v w. wy}ry,.,,ariw .��{ +xis ev 4.mµys F xIXµ 's%s'm awc a.��ywm ta—.. a N�k v ,r rr^fi .{ r{m 'onox fi <br /> ^car .Y,k.�r���i«,a3',�.�.�r,.,kzR;R,�asC�x �.nc�.,�.,M,v.,,�saY4x �`,."w £,,, c.-„�..,��k.�wc�,:`r„�,'..�, a.,ia.ti..<,..,...>",.huc".c's.� S..$�},a-,ra..'�+a.�,, 'a`�,� tt <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <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. Apr 29, 1992 Apr 29, 1992 Apr 29, 1992 Apr 29, 1992 <br /> QC Sample# GBLK042992 GBLK042992 GBLK042992 GBLK042992 <br /> MS/MSS] 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 /> rConc. Matrix <br /> Spike Dup.: 11 12 11 35 <br /> ' Matrix Spike <br /> Duplicate <br /> % Recovery: 110 120 110 117 <br /> ' <br /> Relative <br /> %Difference: 00 00 87 00 <br /> ;o"Ject <br /> QUOIA ANALYTICAL % Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Werence Conc of M S -Conc of M S D X100 <br /> (Conc of M S + Conc of M S D) 2 <br /> Manager 2045=wAT <2> <br /> i <br />