2020-10-27_PERMIT FILE - C1981035 ‎(22)‎

• Permit No: C1981035
• IBM Index Class Name: Permit File
• Doc Date: 10/27/2020
• Section_Exhibit Name: KII Appendix 16 Dunn Ranch LBA Technical Resources Report
• Media Type: D
• Archive: No

Table of Contents
1.0 INTRODUCTION .....................................................................................................................1
2.0 AFFECTED ENVIRONMENT AND ENVIRONMENTAL EFFECTS.....................................................3
2.1 Introduction ...........................................................................................................................3
2.2 Air and Climate Resources.....................................................................................................4
2.2.1 Affected Environment................................................................................................4
2.2.1.1 Airshed for Analysis....................................................................................4
2.2.1.2 Regulatory Requirements..........................................................................4
2.2.1.3 Regional Air Quality...................................................................................8
2.2.1.4 Hazardous Air Pollutants............................................................................9
2.2.1.5 Existing Air Pollutant Emission Sources...................................................12
2.2.1.6 Climate Change........................................................................................12
2.2.1.7 Black Carbon ............................................................................................16
2.2.2 Environmental Effects..............................................................................................17
2.2.2.1 Direct Emissions.......................................................................................17
2.2.2.2 Low Cover Crossing..................................................................................19
2.2.2.3 Indirect Emissions....................................................................................21
2.2.2.4 Cement Production..................................................................................23
2.2.2.5 General Combustion................................................................................23
2.2.3 Direct Air Quality Effects..........................................................................................24
2.2.4 Social Cost of Carbon ...............................................................................................26
2.2.5 Mitigation.................................................................................................................26
2.2.6 Cumulative Actions and Effects ...............................................................................28
2.2.6.1 CARMMS Projected Impacts....................................................................28
2.2.6.2 Greenhouse Gases and Climate Change..................................................37
2.3 Water Resources..................................................................................................................52
2.3.1 Affected Environment..............................................................................................52
2.3.1.1 Water Uses and Designations..................................................................52
2.3.1.2 Baseline Hydrologic Conditions ...............................................................52
2.3.1.3 Surface Water Resources.........................................................................54
2.3.1.4 Groundwater Resources..........................................................................56
2.3.2 Environmental Effects..............................................................................................66
Dunn Ranch Area LBA and Mining Plan Modification i
Technical Resources Report