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Mr. Dustin Czapla 10 CDRMS September 24, 2021 Deposits are generally poorly sorted to unsorted. Because of the lithologic heterogeneity, stratigraphic correlation with the existing regional and areas of interest, lithologic correlation is not feasible Local groundwater flow is illustrated on Figure 21-1 (See attached Appendix 7-1 Groundwater Flow Network Well Logs). Groundwater information and water quality data is presented in detail in section 21.0 Rule 6.4.21 Section 21.8 and Section 21.9. See response below regarding strata formation, characterization, and earthquakes. 16. Rule 6.4.21 EXHIBIT U — Environmental Protection Plan - Surface Water Control and Containment Facilities Information Pursuant to Rule 6.4.21 (10)(a) please provide design specifications certified by a licensed professional engineer for all Environmental Protection Facilities (mill and TSF) intended to: (i) hold, convey, contain, or transport designated chemicals used in the extractive metallurgical process. Response The TSF, as currently permitted, is under construction. When completed it will be signed-off by Simbeck Construction, and as-built drawings provided by the contractor. In addition, we will provide design specifications for all overpack containers that will hold reagents prior to use once purchased. CJK commits to make approval of the above item as condition of permit approval. 17. Rule 6.4.21 EXHIBIT U — Environmental Protection Plan — Water Quality Monitoring Plan Your application provides a water quality monitoring plan pursuant to Rule 6.4.21 (12) on page 21-24 of the application. The application describes two existing monitoring wells, MW-2 and MW-3. Figure 3-3 of Exhibit E shows MW-3 up-gradient of the existing 110 permit affected area and MW-2 as the point of compliance well at the southwest corner of the property. In order to monitor water quality potentially affected by the mill area the Division would like to see another down-gradient monitoring well installed southwest of the mill building and northwest of the TSF, near the west permit boundary at approximate coordinates 39.230008°, - 106.333338°. Please commit to installation of this additional monitoring well and incorporation into the proposed water quality monitoring plan. Response As suggested, CJK will install an additional monitoring wel12 (See Figure 21-2) and sample per CJK's approved groundwater monitoring program. Section 7.0 Rule 6.4.7 Exhibit G Water Information, Section 21.7.4-Monitoring Systems, Section 21.9 - Groundwater Quality Data, Section 21.12 - Mill Water Quality Monitoring Plan, Appendix 21-3 thru Appendix 21-9 Standard Operating Procedures (SOPs) in permit. 18. Rule 6.4.21 EXHIBIT U — Environmental Protection Plan -Climate Pursuant to Rule 6.4.21 (13)(a) provide adequate climatic data representative of the site to perform an acceptable "water balance" for all liquid containment systems Approximate coordinates 39.230008°,-106.333338°.