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<br /> <br />G:\COMMON\Holcim\25510\05 Correspondence\response to DRMS TR 10 review of Na letter\sueker revision 20141118\2014 1119 Response to TR 10 review letter .docx <br /> <br />Mr. Timothy A. Cazier <br />November 19, 2014 <br />Page: <br />6/6 <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 /> <br /> <br /> <br />Christopher S. Peters, CPG <br />Vice President <br /> <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