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,,,j i I L Weck Laboratories, Inc. <br />Client: Union Pacific Rail Road - <br />Project Name: <br />QC Lab# TestGroup <br />Worksheet #: Lab#: <br />WS13159 <br />A002353-001 <br />WS13159 <br />A002353-002 <br />WS13159 <br />A002354-001 <br />WS13159 <br />A002355-001 <br />WS13159 <br />A002430-001 <br />WS13159 <br />A002447-001 <br />WS13159 <br />A002448-001 <br />Note: <br />ND = Not Detected MS = Matrix SpikE <br />BL = Blank DUP = Duplicate <br />Environmental and Analytical Services - Since 1964 <br />QC Report Date: Thursday, April 20, 2000 <br />Project #: <br />QUALITY CONTROL REPORT <br />Amt. %RPD <br />Added/ for Low High <br />Sample QC True %R or 9 <br />Result Result Units Value RPD MSD Limit Limit <br />Test Name Analyzed Date <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />CAM Metals by ICP -MS in soil/solid waste <br />4/5/00 <br />MSD = Matrix Spike Duplicate SURR = Surrogate <br />RPD = Relative Percent Deviation LCS = Laboratory Control Standard <br />Page 7 of 12 <br />14859 East Clark Avenue, City of Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com <br />