2015-04-22_REVISION - M1988112

• Permit No: M1988112
• IBM Index Class Name: REVISION
• Doc Date: 4/22/2015
• Doc Name: TR32 Response Plan
• From: Battle Mountain Resources, Inc
• To: DRMS
• Type & Sequence: TR32
• Email Name: WHE
• Media Type: D
• Archive: No

TABLE OF CONTENTS
1.0
INTRODUCTION ................................................................................. ..............................1
2.0
GROUNDWATER MONITORING WELL M -14 ............................... ..............................2
Laboratory TDS Quality Control Summary ..................................... ............................... 3
2.1 Well Construction ........................................................................................... ............................... 2
Monitoring Well M -14 Cation/Anion Balance ................................. ............................... 4
2.2 Geologic and Hydrogeologic Conditions .................................................... ............................... 2
3.0
RESPONSE PLAN SAMPLING ........................................................... ..............................3
Monitoring Well M -14 Vertical Stratification ................................. ............................... 6
3.1 Field Measurements and Observations ........................................................ ............................... 3
3.2 Water Level Measurements ........................................................................... ............................... 4
3.3 Water Quality Results ..................................................................................... ............................... 5
4.0
DATA ASSESSMENT .......................................................................... ..............................5
4.1 Analytical Correctness ................................................................................... ............................... 5
4.1.1 Laboratory TDS Quality Control ..................................................... ..............................5
4.1.2 Cation and Anion Balancing ............................................................ ..............................6
4.1.3 Calculated TDS .................................................................................. ..............................6
4.2 Water Stratification ......................................................................................... ............................... 7
4.3 Groundwater Characterization ...................................................................... ............................... 7
4.3.1 Piper Diagrams ................................................................................... ..............................7
4.3.2 Maucha Diagrams .............................................................................. ..............................8
4.3.3 Groundwater Well Modeling and Mineral Dissolution - Precipitation Reactions .... 8
4.3.4 CO2, Temperature, and pH Effects ................................................. ..............................9
5.0
PRECIPITATION CHARACTERISTICS ............................................ ..............................9
6.0 LINED TAILING FACILITY (LTF) ASSESSMENT ......................... .............................10
6.1 General LTF Geologic and Hydrogeologic Conditions ............................ .............................10
6.2 Solid Surface Reactions ................................................................................. .............................10
6.3 Analytical Summary ....................................................................................... .............................11
6.4 Chemistry of Calcium and Sodium .............................................................. .............................13
7.0 RESPONSE PLAN SUMMARY .......................................................... .............................13
8.0 REFERENCES ..................................................................................... .............................15
LIST OF TABLES
Table 1 -
Response Plan Analytical Results Summary .................................... ............................... 1
Table 2 - Response Plan Water Levels ............................................................ ............................... 2
Table 3 -
Laboratory TDS Quality Control Summary ..................................... ............................... 3
Table 4 -
Monitoring Well M -14 Cation/Anion Balance ................................. ............................... 4
Table 5 -
Calculated TDS Concentration Summary ........................................ ............................... 5
Table 6 -
Monitoring Well M -14 Vertical Stratification ................................. ............................... 6
Table 7 - Lined Tailing Facility Analytical Summary 2000 to 2014 ............... ............................... 7
TR -32 M -14 TDS Response Plan Report AES, Inc.
Battle Mountain Resources — San Luis, CO 111 January 2015 (Update)