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Wi,1 L <br />Client: Union Pacific Rail Road - <br />Project Name: <br />QC Lab# TestGroup <br />Weck Laboratories, Inc. <br />Environmental and Analytical Services - Since 1964 <br />QC Report Date: Thursday, April 20, 2000 <br />Project #: <br />QUALITY CONTROL REPORT <br />Added/ %RPD <br />Sample QC True %R or for Low High <br />Result Result Units Value RPD MSD Limit Limit <br />A002382-009MS <br />6020cam <br />Anti ony <br />0.20 <br />49 <br />mg/kg <br />50 <br />98.3 <br />A002382-009MS <br />6020cam <br />Arse is <br />7.4 <br />56 <br />mg/kg <br />50 <br />96.4 <br />A002382-009MS <br />6020cam <br />Bariu <br />66 <br />120 <br />mglkg <br />50 <br />106 <br />A002382-009MS <br />6020cam <br />Beryll um <br />0.70 <br />45 <br />mg/kg <br />50 <br />89.2 <br />A002382-009MS <br />6020cam <br />Cadm <br />um <br />0.10 <br />46 <br />mg/kg <br />50 <br />91.9 <br />A002382-009MS <br />6020camChro <br />ium, total <br />6.8 <br />54 <br />mg/kg <br />50 <br />93.7 <br />A002382-009MS <br />6020cam <br />Cobal <br />7.3 <br />54 <br />mg/kg <br />50 <br />93.7 <br />A002382-009MS <br />6020cam <br />Copp <br />r <br />6.8 <br />56 <br />mg/kg <br />50 <br />98 <br />A002382-009MS <br />6020cam <br />Lead <br />1.2 <br />48 <br />mglkg <br />50 <br />93.7 <br />A002382-009MS <br />6020cam <br />Molyb <br />enum <br />1.2 <br />48 <br />mg/kg <br />50 <br />94.6 <br />A002382-009MS <br />6020cam <br />Nickel <br />18 <br />64 <br />mg/kg <br />50 <br />94 <br />A002382-009MS <br />6020cam <br />Seleni <br />m <br />4.2 <br />51 <br />mg/kg <br />50 <br />93.5 <br />A002382-009MS <br />6020cam <br />Silver <br />1.1 <br />11 <br />mg/kg <br />10 <br />99.9 <br />A002382-009MS <br />6020cam <br />Thalli <br />0.50 <br />44 <br />mg/kg <br />50 <br />88.4 <br />A002382-009MS <br />6020cam <br />Vanad <br />um <br />5.0 <br />45 <br />mg/kg <br />50 <br />86.5 <br />A002382-009MS <br />6020cam <br />Zinc <br />41 <br />90 <br />mg/kg <br />50 <br />98.6 <br />A002382-009MSD <br />6020cam <br />Antim <br />y <br />0.20 <br />49 <br />mg/kg <br />50 <br />98.3 <br />0 <br />A002382-009MSD <br />6020cam <br />Arseni <br />7.4 <br />55 <br />mg/kg <br />50 <br />94.8 <br />1 <br />A002382-009MSD <br />6020cam <br />Bariu <br />66 <br />120 <br />mg/kg <br />50 <br />108 <br />1 <br />A002382-009MSD <br />6020cam <br />Berylli <br />0.70 <br />46 <br />mg/kg <br />50 <br />91.6 <br />3 <br />A002382-009MSD <br />6020cam <br />Cadmi <br />m <br />0.10 <br />46 <br />mg/kg <br />50 <br />92.1 <br />0 <br />A002382-009MSD <br />6020cam <br />Chromi <br />m, total <br />6.8 <br />54 <br />mg/kg <br />50 <br />93.5 <br />0 <br />A002382-009MSD <br />6020cam <br />Cobalt <br />7.3 <br />54 <br />mg/kg <br />50 <br />94.5 <br />1 <br />A002382-009MSD <br />6020cam <br />Copper <br />6.8 <br />55 <br />mg/kg <br />50 <br />96 <br />2 <br />A002382-009MSD <br />6020cam <br />Lead <br />1.2 <br />48 <br />mg/kg <br />50 <br />94.1 <br />0 <br />A002382-009MSD <br />6020cam <br />Molybd <br />num <br />1.2 <br />47 <br />mg/kg <br />50 <br />92.4 <br />2 <br />A002382-009MSD <br />6020cam <br />Nickel <br />18 <br />65 <br />mg/kg <br />50 <br />94.2 <br />0 <br />A002382-009MSD <br />6020cam <br />Seleniu <br />4.2 <br />50 <br />mg/kg <br />50 <br />91.1 <br />2 <br />A002382-009MSD <br />6020cam <br />Silver <br />1.1 <br />11 <br />mg/kg <br />10 <br />97.9 <br />2 <br />A002382-009MSD <br />6020cam <br />Thalliu <br />0.50 <br />44 <br />mg/kg <br />50 <br />88.4 <br />0 <br />A002382-009MSD <br />6020cam <br />Vanadi <br />5.0 <br />44 <br />mg/kg <br />50 <br />84.1 <br />3 <br />A002382-009MSD <br />6020cam <br />Zinc <br />41 <br />90 <br />mg/kg <br />50 <br />99.2 <br />0 <br />Method Blank <br />6020cam <br />Antimo <br />0.00 <br />mg/kg <br />Method Blank <br />6020cam <br />Arsenic <br />0.00 <br />mg/kg <br />Method Blank <br />6020cam <br />Barium <br />0.00 <br />mg/kg <br />Method Blank <br />6020cam <br />Berylliu <br />0.00 <br />mg/kg <br />Method Blank <br />6020cam <br />Cadmiu <br />0.00 <br />mg/kg <br />Note: <br />ND = Not Detected MS = Matrix Spike MSD = Matrix Spike Duplicate SURR = Surrogate <br />BL = Blank DUP = Duplicate RPD = Relative Percent Deviation LCS = Laboratory Control Standard <br />14859 East Clark Avenue, Cityf Industry, California 91745-1396 <br />www.wecklabs.com <br />Page 5 of 15 <br />(626) 336-2139 FAX (626) 336-2634 <br />