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r <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> ;�FiESNAr •i,.va.vr..9wh Cw.rss.ra�.$,�xcaov.,,ww. cw.rv�rr nrcw.w.o`o-�,,,"'4'.wk:wn.a.w..�nw.�s Y.w'.w..�.A.�a.w�..wr,Y.��,.?w3}`ccr:csc`,rys5§w-�i ,c,:.w-•`..wlrna'�o-sxa:.aaw»Ywsr�sw3'ai�tvtw.:�:.00wra..a, <br /> Client Prosect ID W0475, Weber PL <br /> 1710 Main Street fi <br /> Escalon, CA 95320 ;> <br /> HAttentlon Tina Le Page OC Sample Group 205-5200 Reported- Jun 2, 1992 Fr <br /> .,,,rrM,,,, a wt:x.M+nr�A++t..K`v.'sw.vri}nnnsKs s•� c �:cr�a.++•rxr y,,r ..,�+R+�.,h ��o+c�ur.,,,, v;v�,.�eaaooss�cV+c oavr.+w.w,.x^ngon r <br /> r,tee,. n.�iawhr,c n-.v nvr.vti hry r�-+.r v�.w�;.r <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 A Mimftab A.Miraftab A Mrraftab A-Miraftab <br /> Reporting Units pg/L ugA pg/L pg/L <br /> ' Date Analyzed May 3o, 1992 May 30, 1992 May 30, 1992 May 30, 1992 <br /> OC Sample# GBLK05.3092 GBLK063092 GBLK053092 GBL.K053092 <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- 96 95 94 28 <br /> ' Matrix Spike <br /> %Recovery 96 95 94 93 <br /> ' Conc. Matrix <br /> Spike Dup.: 10 10 10 30 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 100 100 100 100 <br /> Relative <br /> % Difference: 41 51 62 69 <br /> 1 <br /> SEQUOIA ANALYTICAL %Recovery- Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relatrve%Difference Conc of M S -Conc of M S D X 100 <br /> r L e l (Conc of M S + Conc of M S D) 2 <br /> oiect Manager 2055200 WAT <2> <br />