2024-01-17_REVISION - M2015030

• Permit No: M2015030
• IBM Index Class Name: Revision
• Doc Date: 1/17/2024
• Doc Name: Adequacy Review Response
• From: Asphalt Specialties CO
• To: DRMS
• Type & Sequence: AM2
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

Chavers Mining Resource
Groundwater Monitoring and Mitigation Plan
January 2024
Page ii
TABLE OF CONTENTS
Section Page
1.0 BACKGROUND INFORMATION......................................................................................I
1.1 SITE DESCRIPTION....................................................................................................1
2.0 BASELINE GROUNDWATER CHARACTERIZATION................................................1
2.1 MONITORING WELL NETWORK.............................................................................2
2.1.1 Groundwater Point of Compliance Wells..........................................................2
2.2 BASELINE GROUNDWATER QUANTITY..............................................................2
2.2.1 Predicted Impacts to Hydrologic Balance..........................................................2
2.3 BASELINE GROUNDWATER QUALITY.................................................................3
2.3.1 Groundwater Quality Standards.........................................................................3
2.3.2 Baseline Groundwater Quality Sampling Results..............................................3
3.0 GROUNDWATER MONITORING AND MITIGATION PLAN....................................4
3.1 GROUNDWATER QUANTITY...................................................................................4
3.1.1 Groundwater Measurement Schedule................................................................4
3.1.2 Groundwater Quantity Data Evaluation and Trigger Levels.............................4
3.1.3 Evaluating Impacts to the Hydrologic Balance and Mitigation Measures ........4
3.1.4 Reporting............................................................................................................5
3.2 GROUNDWATER QUALITY .....................................................................................5
3.2.1 Groundwater Sampling Schedule ......................................................................5
3.2.2 Groundwater Sample Collection Procedures.....................................................5
3.2.3 Laboratory Analysis of Groundwater Samples..................................................6
3.2.4 Groundwater Quality Data Evaluation and Trigger Levels...............................6
3.2.5 Evaluating Impacts to Groundwater Quality and Mitigation Measures ............6
3.2.6 Reporting............................................................................................................7
LIST OF FIGURES
FIGURE 1 SITE LOCATION MAP
FIGURE 2 GROUNDWATER MONITORING WELL LOCATION MAP
FIGURE 3 BASELINE GROUNDWATER WELL ELEVATIONS
LIST OF TABLES
TABLE 1 MONITORING WELL CONSTRUCTION INFORMATION AND
BASELINE GROUNDWATER ELEVATIONS
TABLE 2 GROUNDWATER QUALITY STANDARDS
TABLE 3 BASELINE GROUNDWATER QUALITY RESULTS—FIRST FIVE (5)
QUARTERS OF DATA