Precious Metals Recovery LLC RCRA Permit Application Dry Hills ...

an additional 120 feet long and 40 feet wide for the receiving and inspection area). It will be
divided into six areas, each with a separate ventilation system (Appendix 1-A drawing H340940-
0000-45-083-0001). These six areas are as follows:
Office Area.
Process Area (including the Lab).
Clean Storage and Maintenance Area.
Elemental Mercury Storage Area.
Motor Control Center (MCC) Room.
Receiving and Inspection Area (Truck Unloading Area).
Note: All areas except for the Office Area are collectively referred to as the “plant spaces.”
The Office Area will be a clean area and separated from the rest of the building by concrete
walls. This area includes offices, a conference room, a lunch room, change rooms, and the
control room. It will be situated in the northeast corner of the building.
All areas of the proposed TSF where mercury and mercury-bearing materials will be treated,
stored, and managed will be separated from the other areas of the building by concrete walls. The
proposed TSF will house the MCC Room, which will be in close proximity to the incoming
power supply lines. Electrical power is supplied to the proposed TSF by diesel generators which
are located in the Utility Area (outside the proposed TSF Building).
Elemental mercury will be stored in the west end of the building. Elemental mercury will be
contained in pigs, and will be stored on racks equipped with spill trays (see Appendix 1-A
H340940-0000-50-015-0009). All mercury and mercury-bearing materials will be stored in
containers inside the building. The envelope of the proposed TSF Building proper has the
following design features:
Ceilings / roof coated with epoxy enamel.
Exterior concrete wall panels coated with epoxy enamel.
Interior concrete walls coated with epoxy enamel between office and process / storage
areas.
Interior concrete walls coated with epoxy enamel between process and storage areas.
Interior metal walls coated with epoxy enamel within the storage area.
Concrete floors within the process / storage areas coated with epoxy enamel.
The epoxy enamel coating will prevent mercury vapor from being absorbed into the building
materials. This is consistent with the best practice guidelines in the Mine Safety and Health
PMR RCRA Permit Application, Dry Hills Facility Page 6
JBR Environmental Consultants, Inc. | HATCH March 2013