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SEQUOIA ANALYTICAL --- <br /> 680 Chesapeake Drive - Redwood City,CA 94063 <br /> (415)364-9600 - FAX(415) 364-9233 <br /> L}nv n ao-..tai.,:f.`,w.�.r"'�,.mt,�:n�}'`2:a'^...id`..r�a ca�`9�.Kv.,.r,"nn'..rw":�.�i"r".a,`�..:�'i. f- �t,„�x � nt b � ♦ w'� <br /> RESNA <br /> Client Prosect ID W0475,Weber Point � <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Attention Tina Le Page CC Sample Group 2074861-2 Reported: Aug S. 1992 = <br /> ,,� n v.w,r,-N.ww`+tr� 4 `�"'."...'r"' "'?c'�":;�"9r�"�"h�a4�•ani��,,..:n � ,fa F,;ke,rr�, i ti .ir%a"'`s,xcv��"'`:` `v`:':""'r�TF t7.x ?� <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Eftl- <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: M Ni pp M Mpp M N,pp M Nipp <br /> Reporting Units- jug/L p9/L u9/1- N9/L <br /> Date Analyzed Jul 31, 1992 Jul 31, 1992 Jul 31, 1992 Jul 31, 1992 <br /> QC Sample# GBLK073192 GBLK073192 GBLK073192 GBLK073192 <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. Matrix <br /> Spike. 97 98 95 29 <br /> Matrix Spike <br /> % Recovery: 97 98 95 97 <br /> Conc. Matrix <br /> Spike Dup.: 98 99 96 29 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 98 99 96 97 <br /> Relative <br /> % Difference- 10 10 10 00 <br /> EQUOIA ANALYTICAL %Recovery• Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relawe%Difference Conc of M S -Conc of M S D x 100 <br /> ri L e (Conc of M S + Conc of M S D) 2 <br /> roject Manager 2074861 WAT <2> <br />