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Wiil L <br />Client: Union Pacific Rail Road - <br />Project Name: <br />QC Lab# <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />Method Blank <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />QCS <br />TestGroup p <br />6020cam <br />Chrom <br />6020cam <br />Cobalt <br />6020cam <br />Coppei <br />6020cam <br />Lead <br />6020cam <br />Molybd <br />6020cam <br />Nickel <br />6020cam <br />Selenk <br />6020cam <br />Silver <br />6020cam <br />Thalliur <br />6020cam <br />Vanadi <br />6020cam <br />Zinc <br />6020cam <br />Antimoi <br />6020cam <br />Arsenic <br />6020cam <br />Barium <br />6020cam <br />Berylliu <br />6020cam <br />Cadmic <br />6020cam <br />Chromi <br />6020cam <br />Cobalt <br />6020cam <br />Copper <br />6020cam <br />Lead <br />6020cam <br />Molybd( <br />6020cam <br />Nickel <br />6020cam <br />Seleniw <br />6020cam <br />Silver <br />6020cam <br />Thalliun <br />6020cam <br />VanadiL <br />6020cam <br />Zinc <br />Note: <br />ND = Not Detected MS = Matrix Spike <br />BL = Blank DUP = Duplicate <br />total <br />total <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 />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mglkg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mg/kg <br />0.00 <br />mglkg <br />0.05 <br />mg1l <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />0.05 <br />mg/l <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mg/I <br />0.05 <br />0.05 <br />mgA <br />0.05 <br />MSD = Matrix Spike Duplicate SURR = Surrogate <br />RPD = Relative Percent Deviation LCS = Laboratory Control Standard <br />100 <br />102 <br />100 <br />100 <br />98 <br />100 <br />102 <br />104 <br />100 <br />102 <br />106 <br />98 <br />98 <br />102 <br />102 <br />102 <br />Page 6 of 15 <br />14859 East Clark Avenue, City c f Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com <br />