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Wiii L <br />Weck Laboratories, Inc. <br />Environmental and Analytical Services - Since 1964 <br />Client: Union Pacific Rail Road - Sto4ton QC Report Date: Thursday, April 20, 2000 <br />Project Name: Project #: <br />QUALITY CONTROL REPORT <br />Amt. %RPD <br />Addedl <br />rue <br />Sample QC True %R or for Low High <br />QC Lab# TestGroup Para eter Result Result Units Value RPD MSD Limit Limit <br />A002447-001 MS 6020_stic Solubl antimony on WET extract (STLC) ND 11 mg/L 10 111 <br />A002447-00lMS 6020_stic Solubl arsenic on WET extract (STLC) ND 10 mg/L 10 101 <br />A002447-001 MS 6020_stic Solubl4 barium on WET extract (STLC) ND 10 mg/L 10 102.8 <br />A002447-001MS 6020_stic Soluble beryilium on WET extract (STLC) ND 10 mg/L 10 103 <br />A002447-001 MS 6020_stic SolubleI cadmium on WET extract (STLC) ND 10 mg/L 10 104 <br />A002447-00lMS 6020_stic Solublq cobalt on WET extract (STLC) ND 9.0 mg/L 10 90.1 <br />A002447-001MS 6020_stic Solubl copper on WET extract (STLC) ND 9.2 mg/L 10 90.9 <br />A002447-001 MS 6020_stic Solubl lead on WET extract (STLC) ND 11 mg/L 10 106.2 <br />A002447-00lMS 6020_stic Solubl molybdenum on WET extract (STLC) ND 10 mg/L 10 102.6 <br />A002447-001 MS 6020_stic Soluble nickel on WET extract (STLC) ND 8.9 mg/L 10 88.9 <br />A002447-001 MS 6020_stic Soluble selenium on WET extract (STLC) ND 11 mg/L 10 106 <br />A002447-001 MS 6020_stic Soluble silver on WET extract (STLC) ND 2.3 mg/L 2 114.5 <br />A002447-00lMS 6020_stic Soluble lthallium on WET extract (STLC) ND 9.6 mg/L 10 95.5 <br />A002447-001 MS 6020_stic Soluble total chromium on WET ext.-STLC ND 9.5 mg/L 10 94.7 <br />A002447-001 MS 6020_stic Soluble �inc on WET extract (STLC) ND 9.9 mg/L 10 97.1 <br />A002447-001 MS 6020_stic Solute vanadium on WET extract (STLC) ND 9.4 mg/L 10 94.3 <br />A002447-001 MSD 6020_stic Soluble antimony on WET extract (STLC) ND 11 mg/L 10 ill 0 <br />A002447-001 MSD 6020_stic Solublersenic on WET extract (STLC) ND 9.8 mg/L 10 98.1 3 <br />A002447-00lMSD 6020_stic Soluble arium on WET extract (STLC) ND 10 mg/L 10 102.8 0 <br />A002447-00lMSD 6020_stic Soluble eryllium on WET extract (STLC) ND 10 mg/L 10 104 1 <br />A002447-001MSD 6020_stic Soluble onWETextract(STLC) ND 11 mg/L 10 106 2 <br />A002447-001MSD 6020stic Soluble obalt on WET extract (STLC) ND 9.2 mg/L 10 91.8 2 <br />A002447-00lMSD 6020_stic Soluble ;admium <br />opper0 <br />WET extract (STLC) ND 9.5 mg/L 10 93.8 3 <br />A002447-00lMSD 6020_stic Soluble I ad on WET extract (STLC) ND 11 mg/L 10 105.2 1 <br />A002447-00lMSD 6020_stic Soluble olybdenum on WET extract (STLC) ND 10 mg/L 10 101.6 1 <br />A002447-001MSD 6020_stic Soluble ickel on WET extract (STLC) ND 9.2 mg/L 10 91.7 3 <br />A002447-00lMSD 6020_stic Soluble lenium on WET extract (STLC) ND 10 mg/L 10 102 4 <br />A002447-00lMSD 6020_stic Soluble Iver on WET extract (STLC) ND 2.3 mg/L 2 114.5 0 <br />A002447-001 MSD 6020_stic Soluble t allium on WET extract (STLC) ND 9.4 mg/L 10 94 2 <br />A002447-00lMSD 6020_stic Soluble t tal chromium on WET ext.-STLC ND 9.7 mg/L 10 96.5 2 <br />A002447-001 MSD 6020_stic Soluble nc on WET extract (STLC) ND 9.7 mg/L 10 94.5 3 <br />A002447-001 MSD 6020_stic Solule va adium on WET extract (STLC) ND 9.4 mg/L 10 93.7 1 <br />Method Blank 6020_stic Soluble a timony on WET extract (STLC) 0.00 mg/L <br />Method Blank 6020 stic Soluble a senic on WET extract (STLC) 0.00 mg/L <br />Method Blank 6020_stic Soluble b rium on WET extract (STLC) 0.00 mg/L <br />Method Blank 6020_stic Soluble b ryllium on WET extract (STLC) 0.00 mg/L <br />Method Blank 6020 stic Soluble c dmium on WET extract (STLC) 0.00 mg/L <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 8 of 12 <br />14859 East Clark Avenue, City o Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />1 www.wecklabs.com <br />