2020-08-03_REVISION - M1980244 ‎(4)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 8/3/2020
• Doc Name Note: Exhibit G
• Doc Name: Adequacy Review - Preliminary
• From: CC&V
• To: DRMS
• Type & Sequence: AM13
• Email Name: TC1
• Email Name: MAC
• Email Name: ERR
• Email Name: JPL
• Email Name: BFB
• Media Type: D
• Archive: No

Cripple Creek & Victor Gold Mining Company Exhibit G Cresson Project Amendment 13 7
2.2.7 Squaw Gulch
The activities associated with Amendment 13 are not expected to have an impact on groundwater quality in the Squaw Gulch drainage as the proposed activities will be entirely on previously disturbed lands.
2.2.8 Grassy Valley
The activities associated with Amendment 13 are not expected to impact groundwater in Grassy Valley.
3 WATER QUALITY MONITORING
CC&V maintains an extensive monitoring and stormwater management network at the Cresson Project. Various plans have been developed by CC&V to manage and monitor surface and groundwater quality including the following:
Stormwater Management Plan, provided in Appendix 3; Water Quality Monitoring Plan, provided in Appendix 7; and Quality Assurance Project Plan, provided in Appendix 7.
Surface water and groundwater monitoring is conducted by CC&V professional staff or outside contractors, as needed. Samples collected in connection with this monitoring program are analyzed by qualified third-party laboratories. Historical surface water and groundwater sampling data is provided as Appendix 6 to this Amendment 13 permit. Appropriate quality assurance and quality control (“QA/QC”) procedures are used to validate the sample collection and analytical methods, as described in the Quality Assurance Project Plan (QAPP) and Field Sampling Guidance provided as Appendix 7 to this Amendment 13 permit.
3.1 Surface Water Monitoring
Surface water quality and flow monitoring will be conducted as stated in previous submittals on a quarterly basis. The following locations are recognized as compliance surface monitoring locations: one station down-gradient of Valley Leach Facility 1 (VLF1) on Arequa Gulch (AG-2.0); one station downgradient of the East Cresson Mine area on Theresa Gulch (T-2); a station downgradient of the operations on Wilson Creek just below the confluence with Bateman Creek (WCSW-01); and two stations in Grassy Valley (GV-02, and GV-04). No surface water monitoring station is located downgradient of the VLF2 in Squaw Gulch as this is a zero-discharge facility. VLF2 Phase 3 also will be a closed loop facility. Samples collected at the surface water monitoring stations, shown in Table G-1 below, and on Figure G-1. A list of surface water parameters is