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Water Quality Monitoring Plan Climax Molybdenum Company <br /> Version:R4 Permit No M-1977-493 <br /> TABLE OF CONTENTS <br /> 1.0 PURPOSE........................................................................................................................................1 <br /> 2.0 SITE DESCRIPTION........................................................................................................................2 <br /> 2.1 General Setting...................................................................................................................2 <br /> 2.2 Site Hydrogeology...............................................................................................................2 <br /> 2.3 Monitoring Network.............................................................................................................3 <br /> 3.0 CLIMAX DRAINAGE BASINS AND MONITORING SITES............................................................4 <br /> 3.1 Arkansas River Watershed.................................................................................................4 <br /> 3.1.1 Existing and Potential Future Uses of Groundwater..............................................4 <br /> 3.1.2 Location and Description of Classified Stream Segments.....................................4 <br /> 3.1.3 Potential Contaminant Sources and EPFs............................................................ 4 <br /> 3.1.4 Hydrogeology......................................................................................................... 5 <br /> 3.1.5 Groundwater Monitoring Sites............................................................................... 5 <br /> 3.1.6 Surface Water Monitoring Sites............................................................................. 6 <br /> 3.2 Eagle River Watershed.......................................................................................................6 <br /> 3.2.1 Existing and Potential Future Uses of Groundwater.............................................. 6 <br /> 3.2.2 Location and Description of Classified Stream Segments..................................... 6 <br /> 3.2.3 Potential Contamination Sources and EPFs.......................................................... 6 <br /> 3.2.4 Hydrogeology......................................................................................................... 7 <br /> 3.2.5 Groundwater Monitoring Sites............................................................................... 7 <br /> 3.2.6 Surface Water Monitoring Sites............................................................................. 8 <br /> 3.3 Tenmile Creek Watershed ..................................................................................................8 <br /> 3.3.1 Existing and Potential Future Uses of Groundwater.............................................. 9 <br /> 3.3.2 Location and Description of Classified Stream Segments..................................... 9 <br /> 3.3.3 Potential Contamination Sources and EPFs.......................................................... 9 <br /> 3.3.4 Hydrogeology......................................................................................................... 9 <br /> 3.3.5 Groundwater Monitoring Sites...... ............................... ...................................... 10 <br /> 3.3.6 Surface Water Monitoring Sites........................................................................... 10 <br /> 4.0 MONITORING PARAMETERS AND MONITORING SCHEDULE...............................................12 <br /> 4.1 Monitoring Parameters...................................................................................................... 12 <br /> 4.1.1 Groundwater Monitoring...................................................................................... 12 <br /> 4.1.2 Internal Surface Water Monitoring Sites.............................................................. 17 <br /> 4.1.3 River and Eagle Park Reservoir Surface Water Monitoring................................ 19 <br /> 4.1.4 Surface Water Monitoring Baseline Data Evaluation...........................................20 <br /> 4.2 Monitoring Schedule.........................................................................................................21 <br /> 5.0 NPLS, DATA ANALYSIS AND REPORTING...............................................................................22 <br /> 5.1 Numeric Protection Levels (NPLs) for POC Wells............................................................22 <br /> 5.1.1 Arkansas River Watershed..................................................................................23 <br /> 5.1.2 Eagle River Watershed........................................................................................ 24 <br /> 5.1.3 Tenmile Creek Watershed................................................................................... 26 <br /> 5.2 Data Analysis....................................................................................................................27 <br /> 5.2.1 POC Groundwater Monitoring Sites NPL Evaluation...........................................27 <br /> 5.2.2 Additional Data Evaluation...................................................................................28 <br /> EPP—Appendix C May 2018 i <br />