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2. Monitoring Plan <br /> Contained with the recently approved Amendment 11 to the Cresson permit M-1980-244 is the current <br /> approved groundwater monitoring plan for the CC&V mine site. This monitoring plan identifies the <br /> locations for groundwater monitoring, the frequency of monitoring, and analysis is to be performed. <br /> Section 11.2 states the following: <br /> 11.2 Groundwater <br /> Groundwater quality and depth to groundwater is monitored on a quarterly basis at the <br /> following locations: downgradient of the AGVLF in Arequa Gulch (CRMW-3A and <br /> CRMW-3B) and Wilson Creek (WCMW-3 and WCMW-6); downgradient of the SGVLF in <br /> Squaw Gulch (SGMW-5); downgradient of the East Cresson Mine area at two locations in <br /> Vindicator Valley (VIN-2A and VIN-213) and five locations in Grassy Valley (GVMW-8A, <br /> GVMW-8B, GVMW-22A, and GVMW-22B); downgradient of the North Cresson Mine <br /> area in Poverty Gulch at one location (PGMW-2); and downgradient of the External <br /> Storage Pond ("ESP") in Arequa Gulch (ESPMW-1). A list of wells, parameters analyzed, <br /> and results are presented in Appendix 2, Volume II of this Amendment 11 documentation. <br /> Groundwater may not be encountered in some wells completed to within a few hundred <br /> feet of the surface. In these cases, monitoring will be limited to checking water levels (i.e., <br /> checking for the presence of water) and samples will not be analyzed unless sufficient <br /> water is encountered to allow sampling and analysis of non-turbid water." <br /> Table 11-2 contained within section 11.2, the groundwater monitoring plan presents the monitoring <br /> intervals that are attributed to the monitoring locations identified within the monitoring plan. All <br /> groundwater monitoring locations listed within this table are to be sampled on a quarterly basis. <br /> Our review of the monitoring locations identified within the monitoring plan confirms that CC&V is <br /> monitoring the appropriate locations for groundwater quality. For the identified facilities on site, <br /> appropriate down-gradient monitoring locations have been identified and monitoring points have been <br /> constructed. The monitoring frequency specified within the monitoring plan (quarterly) is appropriate for <br /> the mine site. Figure 2 presents the groundwater monitoring locations identified within the monitoring <br /> plan, and their position relative to existing mine facilities. <br />