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Climax Mine Water Quality Monitoring Plan Evaluation - 2015 <br /> Sampling Locations <br /> Groundwater Sample Locations: ARwell, ARK-MW-001 D, ARK-MW-002S, ARK-MW- <br /> 002D, EVMW-1 S, EVMW-1 D, EVMW-2, EVMW-3S, <br /> EVMW-3D, EV-MW-004, EVS-1 , EVS-2, EVS-3, GWM-1 , <br /> TM-MW-001 D, GWM-2, TM-MW-002D <br /> Internal Surface Water Sample <br /> Locations: CC-SW1, EI-SW1 <br /> Surface Water Sample Locations:Arkansas #1 , Arkansas #2, Al, BI, EPR Outlet <br /> During 2015 water quality samples were successfully collected quarterly from the above <br /> sample locations with the exception of the following: <br /> First Quarter- <br /> - EVS-1 , EVS-2, EVS-3, CC-SW1 , Arkansas #1, Al, BI — Inaccessible <br /> - EPR Outlet — Insufficient Flow <br /> Third Quarter: <br /> - EVS-1 , EPR Outlet— Insufficient Flow <br /> Fourth Quarter: <br /> - EVS-1 - Dry <br /> Tabulated monitoring data for 2015 are attached. An evaluation of 2015 monitoring results <br /> are discussed below. <br /> Discussion of Results: POC Wells <br /> The 2015 analytical results for indicator parameters at POC Wells were tabulated and <br /> compared to existing NPLs or CBSG Table Values (where NPLs have not yet been <br /> established). The concentrations of manganese at EVMW-3S, EV-MW-004, and ARK-MW- <br /> 001 D were variable in 2015 and intermittently observed above the CBSG Table Value. In <br /> the fourth quarter of 2015, the pH at GW#2 in the Tenmile Creek Watershed was measured <br /> at just under the lower value of the NPL range. Climax notified DRMS and resampled the <br /> well. The results of the resample showed the pH at GW#2 was within the NPL range. <br /> 1 <br />