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tun <br /> .. � -a man` ; if :--a r �r•ac <br /> �`�"""K#`¢ ' ,�"`1+..'2 w � ' �%' R'�i'�•_.,m' ,,, ,�3'p�•r.���, r � � t .,�� .: <br /> 'x= �• w'�-. ,:it s � � y -a"=�. ' r � nv'�' s ,�, � - :� ,�, �-,,�,,,,,. .fix <br /> r <br /> c <br /> SEQUOIA ANALYTICAL <br /> 1400 Bates Avenue . Suite LM a Concord. CaVomia 94520 <br /> (415)686-3600 0 FAX(415)686-9699 <br /> Delta Env tonmontaf Co istiltants Client Project ID:40.68-586/Ctfarterway SHELL j= <br /> 3330 oats DrNe <br /> Ra,-som Ccwdova,CA 95670 <br /> AZiemlon: Steve Meese QC Sans a -coup:0100636-40 Rs rted:Oct 29. 1990 <br /> QUALM CONTROL DATA REPORT <br /> ,._ <br /> Benzene Tetuan$. Benton 814611164 <br /> Method: EPAso1s/8o2o EPA0415/6= EPA841a/M120 EPAS015/8= <br /> Ant.iyet: E.!Hamilton E Hwaton E Hampton Iw HunAlon <br /> Reporting(!nits: l71/L PQ/L p'p/L Wt. <br /> Date Art3lyxed: ck.K a 1900 Oct 4 Imo Oct 2s. IM Oct 23, IM <br /> OC Sample#: 010-= 010aaza 0104*23 0104= <br /> Sample Conc.: N.D. N.D. M.D. N.D. <br /> Spike Cone. <br /> Added: 20 20 20 60 ` <br /> Cone.Matrix <br /> Spike: 19 1i 20 56 <br /> I <br /> i <br /> Matrix Spike <br /> %Recovery: 95 95 100 97 <br /> Cone.Matrix <br /> Spike Dup.: 19 19 19 51 <br /> Matrix Spike <br /> i <br /> Duplicate <br /> %Recovery: 95 95 95 95 <br /> Relative s <br /> %Difference: 0 0 5.1 1.7 <br /> SEQUOIA ANALYTICAL b Recovery: Ccnc.of M.5.-Conc.of Safr.pte x100 <br /> Spike Conn.Added <br /> ./A -' Relavvo%Difference: Coria.of M.S.-Cont,of M.S.D. x 140 <br /> OLAU S.Materstein (Cont.of M.S.+cone.of M.S.D.) 2 <br /> Yroject Manager 144836.DLT <2> <br />