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WnI L <br />Client: Union Pacific Rail Road - <br />Project Name: <br />QC Lab# TestGroup Paranheter <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 />Worksheet #: Lab#: <br />W S 13351 A002447-001 <br />WS13351 A002448-001 <br />rest Name <br />Soluble Mercury in STLC <br />Soluble Mercury in STLC <br />Amt. <br />A002447-001MS <br />hg_stic <br />Solubl <br />Mercury in STLC <br />A002447-001MSD <br />hg_stic <br />Solubl <br />Mercury in STLC <br />Method Blank <br />hg_stic <br />Solubl <br />Mercury in STLC <br />QCS <br />hg stic <br />Solubt <br />Mercury in STLC <br />Worksheet #: Lab#: <br />W S 13351 A002447-001 <br />WS13351 A002448-001 <br />rest Name <br />Soluble Mercury in STLC <br />Soluble Mercury in STLC <br />Analyzed Date <br />4/14/00 <br />4/14/00 <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 />Page 10 of 12 <br />14859 East Clark Avenue, City �f Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com <br />Amt. <br />%RPD <br />Sample <br />QC <br />Added/ <br />True <br />for Low High <br />%R or 9 <br />Result <br />Result <br />Units <br />Value <br />RPD MSD Limit Limit <br />ND <br />0.018 <br />mg/L <br />0.02 <br />89.5 <br />ND <br />0.017 <br />mg/L <br />0.02 <br />85.5 5 <br />0.000 <br />mg/L <br />0.072 <br />mg/L <br />0.075 <br />96 <br />Analyzed Date <br />4/14/00 <br />4/14/00 <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 />Page 10 of 12 <br />14859 East Clark Avenue, City �f Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com <br />