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Item 18. Please amend section 2.4 to specify that water monitoring data will be compiled into a <br /> report and submitted to the Division annually. Please also specify the date. The report should <br /> include the operator's analysis of the data, as well as the data itself. <br /> We have amended the Groundwater Monitoring plan (updated as a new addendum) as <br /> requested. <br /> 6.4.12 Exhibit L- Reclamation Costs <br /> Item 51) This exhibit should be updated, as necessary, to match any revisions to Exhibits D and <br /> E, per the adequacy items for those sections. This includes details on structures. <br /> • Exhibit L requires a statement by RM committing to posting additional bond in the future as <br /> mining progresses beyond the initial extraction shown on the map in Exhibit C-2. <br /> • Page 3 must be updated to explain the value of 70.21 acres.The Division also recommends that <br /> an explanation for this value be added to page 16 in Exhibit D. <br /> • Regardingthe dewateringcalculations on page 4, there appearto be errors and omissions in the <br /> way the calculations are shown. Please check this and add explanations. For example,what is <br /> the origin of 9,710,931 gallons per acre? Is this based on a water depth of 30 feet in the pit? <br /> Also, please explain the origin of the inflow rate of 14,700,000 gallons per day as well as the <br /> volume percentage of 19.6. <br /> • It appears that only one side of the crescent-shaped pit(the yellow hatching on the map in <br /> Exhibits C-2 and L)will require grading. Please provide an explanation of this in Exhibit L(pages 5 <br /> —7); in particular, discuss if the internal perimeter length will be graded concurrently as the <br /> extraction progresses.The explanation can entail a reference to the mining process in Exhibit D <br /> or the reclamation process in Exhibit E. <br /> • More detail is needed for the liner installation in Exhibit L.Add a discussion on the construction <br /> process, including if and where the liner material will be sourced and where it will be stockpiled <br /> prior to use as a liner. Discuss the size of lifts and the need for compaction. <br /> Additional questions relating to Item 51) were provided in a second adequacy response as <br /> follows: <br /> As I look closer at the clay liner design and respective costs, I have identified some details that <br /> should be added to the exhibits of the TRP application. These could be included in Exhibit E or <br /> Exhibit L. These items complement the liner-related request in Item #51 in my letter dated <br /> February 9, 2023. <br /> 1. Add a discussion of the anticipated soils available for liner material, including parameters such <br /> as plasticity, percentage of fines,and percentage of gravel.Also discuss how these parameters <br /> relate to hydraulic conductivity. <br /> 2. Add a discussion of the material blending process for liner construction, if applicable. <br /> 3. Discuss requirements for and construction procedures related to moisture content.Can you <br /> estimate the amount of water that may be used to adjust moisture content? <br /> 4. Add a discussion on lifts, including the height of lifts and the number of compaction passes per <br /> lift.What equipment will be used for compaction?How will bonding between lifts be achieved <br /> (e.g.,scarification)? <br />