2015-03-18_REPORT - C1982056 (4)

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taking water level measurements. In the fall of 2008, TC provided the Jones family with underground water storage tanks, a new plumbing system, and imported water, so that they could discontinue use of the well. At that time, the old plumbing system to the Jones well was decommissioned eliminating alluvial water sampling access. It is TC's intend to submit a revision in 2014, to remove the Jones well from the permit. Middle Creek Alluvial Groundwater: TC has no active Middle creek alluvial wells. Two Middle Creek alluvial wells (AVM -1 and AVM -2) were incorporated into the monitoring network during 1996, however, per TR03 -42, these wells were abandoned in the Fall of 2003. Refer to previous AHRs for earlier data. 3.21 Points of Compliance Rule 4.05.13(1)(b) requires formal establishment of ground water points of compliance for coal operation which has the potential for negatively impacting the quality of ground water for which quality standards have been established by the Colorado Water Quality Control Commission. The Commission's Rule 41 sets forth Basic Standards for ground Water. These Standards are applicable to ground water at the Foidel Creek Mine. In the judgment of DRMS, these Standards are applicable to ground water at the Foidel Creek Mine, however it is also the judgment of DRMS, the Foidel Creek Mine does not have the potential to negatively impact bedrock aquifers due to the nature of the geology (i.e. synclinal basin) found at the mine's location. Wells 008 -AV -2 ( Foidel Creek alluvium), 008 -AU -3 (Fish Creek alluvium), and well 008 -AT -1 (Trout Creek alluvium) will satisfy the requirements for alluvial ground water points of compliance. 3.3 Surface Water Monitoring Monitorine/Sampline Requirements: Table 32 presents a summary of surface water monitoring frequencies, which was last updated for Permit Revision 6 (PR 03 -06 Exhibits 14 -7 through 14 -10) in March of 2004. Site locations are shown on Figure 2 , Hydrologic Monitoring Plan of TR03 -42 (as well as in Figure 2 of this AHR). Table A of Exhibit 14 specifies three seasonal monitoring episodes (i.e. October to February, March to May, and June to September), each of which are further divided into two general categories of sampling frequency: 1) "Regular" monitoring that is done continuously, and 2) "Contingent" monitoring that is conducted only when there is a discharge from underground mine pumping at surface discharge sites 109 and/or 115, which did not occur in 2014. Note that discharge from site 109 has not occurred in several years, and is not anticipated to occur in the future. 2014 surface water data is provided in Tables 33 through 49. Water quality parameters for these sites were typically within previously established ranges, unless otherwise discussed below. An historical summary of data has been provided in Tables 35a through 51a. a