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

Due to the wet nature of the caustic leach process, dust is not expected to be significant. The
multi-staged carbon filtration system is designed to remove moisture, acid, and mercury vapors
present in the air. This concept is shown in Figure 23.1-4 below.
Calomel Feed
Preparation
Tanks
Tank Vents
23.1.4 Tank Off-Gas Conditioning
Figure 23.1-4: Ventilation System Concept
The tank off-gas from the Waste Solution Storage Tank, Waste Solution Treatment Tank, and the
Caustic Leach Circuit is designed to be scrubbed via two carbon columns (see Figure 1.2-9).
After being scrubbed in the carbon columns, the off-gas can be discharged through the exhaust
duct. A detailed diagram of the exhaust gas is included in the Process Flow Diagrams in
Appendix 1-C.
23.1.5 Water and Sanitary Water Tanks
Carbon Filter
for Acid
Removal
Carbon Filter
for Mercury
Removal
To Exhaust Duct
A municipal water supply tanker will bring domestic water to the proposed TSF for both the
Water Storage Tank and the Fire Water Storage Tank, which are both located in the Utility
Building (see H340940-0000-50-042-0003 in Appendix 1-A). The Fire Water Storage Tank is
also designed to receive fresh water from other sources via supply tanker.
PMR RCRA Permit Application, Dry Hills Facility Page 124
JBR Environmental Consultants, Inc. | HATCH March 2013