Extraction and Beneficiation of Ores and Minerals; Volume 4: Copper

Technical Resource Document: Copper1.7.3 Department of Agriculture ............................................ 1-1031.7.3.1 Forest Service ............................................. 1-1031.7.4 Army Corps of Engineers ............................................. 1-1041.7.5 State Programs ..................................................... 1-1051.7.5.1 Arizona .................................................. 1-1051.8 REFERENCES ............................................................. 1-1102.0 MINE SITE VISIT: ASARCO/TROY MINE ............................................. 2-12.1 INTRODUCTION ............................................................ 2-12.1.1 Background ........................................................ 2-12.1.2 General Facility Description ........................................... 2-22.1.3 Environmental Setting ................................................ 2-72.1.3.1 Surface Water .............................................. 2-72.1.3.2 Geology ................................................... 2-82.1.3.3 Hydrogeology .............................................. 2-82.2 FACILITY OPERATIONS .................................................... 2-112.2.1 Mining Operations .................................................. 2-132.2.2 Milling Operations .................................................. 2-152.3 WASTE MANAGEMENT .................................................... 2-182.3.1 Types of Waste ..................................................... 2-182.3.2 Solid Waste Management Units ........................................ 2-182.3.2.1 Tailings Thickener .......................................... 2-182.3.2.2 Tailings Pipeline ........................................... 2-192.3.2.3 Tailings Impoundment ...................................... 2-192.3.2.4 Waste Rock ............................................... 2-242.3.2.5 Waste Oil Storage Tanks .................................... 2-242.3.2.6 Burn Pit .................................................. 2-242.3.3 Waste Water Management Units ....................................... 2-242.3.3.1 Mine Water ............................................... 2-242.3.3.2 Sanitary Sewage ........................................... 2-252.3.3.3 Assay Laboratory Wastes .................................... 2-252.3.4 Hazardous Waste Management Unit .................................... 2-252.3.4.1 Waste Solvent Tanks ........................................ 2-252.4 MONITORING ............................................................. 2-262.4.1 Surface Water ...................................................... 2-262.4.2 Ground Water ...................................................... 2-292.4.3 Air ............................................................... 2-292.5 REGULATORY REQUIREMENTS AND COMPLIANCE ......................... 2-302.5.1 Operating Permit ................................................... 2-302.5.2 Solid Waste ....................................................... 2-302.5.3 Surface Water ...................................................... 2-312.5.4 Ground Water ...................................................... 2-312.5.5 Air ............................................................... 2-312.5.6 Hazardous Waste ................................................... 2-322.6 REFERENCES ............................................................. 2-333.0 MINE SITE VISIT: SAN MANUEL FACILITY MAGMA COPPER COMPANY .................... 3-13.1 INTRODUCTION ............................................................ 3-13.1.1 Background ........................................................ 3-13.1.2 General Description .................................................. 3-23.1.3 Environmental Setting ................................................ 3-53.1.3.1 Geology ................................................... 3-53.1.3.2 Hydrology ................................................. 3-93.2 FACILITY OPERATIONS .................................................... 3-163.2.1 Oxide Ore ........................................................ 3-20iii