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ARCADIS Mr. Timothy A. Cazier <br /> August 4, 2014 <br /> Table 1 - Depth to Water and Sodium Concentrations for Holcim-Portland Quarry <br /> Monitoring Wells <br /> Table 2—Bulk Concentration Range for Potassium and Sodium Oxides in Cement <br /> Kiln Dust <br /> Table 3—Historical Potassium to Sodium Ratios in Water Samples at Cement Plant <br /> Sites <br /> Figure 1 —Holcim Portland Quarry Groundwater Flow Map(March 2014) <br /> Figure 2—Monitoring Well MW-7 Sodium and Depth to Water Over Time <br /> Figure 3—Monitoring Well MW-13 Sodium and Depth to Water Over Time <br /> Attachment 1 —DRMS Approval Letters for Groundwater Monitoring Plan <br /> Attachment 2—Well Construction and Geologic Logs <br /> Copies: <br /> Justin Andrews, Holcim (US) Inc. <br /> Lauri Yusko, ARCADIS <br /> File <br /> Page: <br /> C IUserslyusko1DocumerN1Fblpm12014 W7 Sodium12014 0804 Proposal to Remove Ne from Groundwater Monitoring-FINAL.docx 4/4 <br />