2024-11-04_PERMIT FILE - M2024056 ‎(6)‎

• Permit No: M2024056
• IBM Index Class Name: Permit File
• Doc Date: 11/4/2024
• Doc Name: Application
• From: Asphalt Specialties Co., Inc
• To: DRMS
• Email Name: NCG
• Email Name: JLE
• Email Name: EL1
• Media Type: D
• Archive: No

Evans Mining Resource
Groundwater Monitoring Plan
October 2024
Page ii
TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION 1
1.1 SITE DESCRIPTION 1
2.0 BASELINE GROUNDWATER CHARACTERIZATION 1
2.1 MONITORING WELL NETWORK 2
2.2 BASELINE GROUNDWATER QUANTITY 2
2.3 BASELINE GROUNDWATER QUALITY 2
2.3.1 Groundwater Quality Benchmarks 2
2.3.2 Baseline Groundwater Quality Sampling Results 3
3.0 PREDICTED IMPACTS TO HYDROLOGIC BALANCE 3
4.0 GROUNDWATER MONITORING PLAN 4
4.1 GROUNDWATER QUANTITY 4
4.1.1 Groundwater Measurement Schedule 4
4.1.2 Groundwater Quantity Data Evaluation and Trigger Levels 4
4.1.3 Reporting 4
4.2 GROUNDWATER QUALITY 5
4.2.1 Groundwater Sampling Schedule 5
4.2.2 Groundwater Sample Collection Procedures 5
4.2.3 Laboratory Analysis of Groundwater Samples 5
4.2.4 Groundwater Point of Compliance Wells 6
4.2.5 Groundwater Quality Data Evaluation and Trigger Levels 6
4.2.6 Reporting 6
LIST OF FIGURES
FIGURE 1 SITE LOCATION MAP
FIGURE 2 MONITORING WELL NETWORK MAP
FIGURE 3 AVERAGE BASELINE GROUNDWATER POTENTIOMETRIC MAP
FIGURE 4 BASELINE GROUNDWATER WELL ELEVATIONS
LIST OF TABLES
TABLE 1 BASELINE GROUNDWATER ELEVATIONS (TO-DATE)
TABLE 2 WQCC REGULATION 41 INTERIM NARRATIVE STANDARDS
(INS) TABLES 1 —4
TABLE 3 BASELINE GROUNDWATER QUALITY RESULTS (TO-DATE)