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ARCADIS Mr. Timothy A. Cazier <br /> November 19, 2014 <br /> We look forward to your response. Please contact me at 517.324 5052 (office) or <br /> 517.927.3611 (cell) if you have any questions. <br /> Sincerely, <br /> ARCADIS <br /> Christopher S. Peters, CPG <br /> Vice President <br /> Tables: <br /> Table 1 Compositional Concentrations for Alkali Bypass Dust at Holcim <br /> Portland Plant-2014(weight percent) <br /> Table 2 Summary of Compositional Potassium and Sodium Concentrations <br /> in Cement Kiln Dust/Alkali Bypass Dust <br /> Table 3 Historical Cl, K, and Na Concentrations in Monitoring Well MW-7 <br /> Table 4 Synthetic Precipitation Leaching Procedure Test Results <br /> Figures: <br /> Figure 2 Sulfate, Sodium, and Potassium versus Depth to Groundwater <br /> Figure 3 Sodium Concentrations versus Potassium to Sodium and Chloride to <br /> Sodium Ratios <br /> Figure 4 Sodium and Sulfate Concentrations <br /> Figure 5 General Geochemistry <br /> Figure 6 MW-7 Well Completion, Depth to Groundwater, and Water Quality <br /> Attachments: <br /> 1 Boring Log for Monitoring Well MW-7 <br /> Copies: <br /> Justin Andrews, Holcim (US) Inc. <br /> Lauri Yusko,ARCADIS <br /> Julie Sueker,ARCADIS <br /> File <br /> Page: <br /> G 1COMMON1Holdmt25510105 Conespondenwe reWonee to DRMS TR 10 review of Na letter—eker revision 20141118\2014 1119 Response to TR 10 review letter A— 6/6 <br />