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

Wash water from open sumps.
Safety showers and eye wash stations.
Laundry machine, locker room showers, and sinks.
Process waste solution from all sources, with the exception of the calomel caustic leach circuit
waste solution, will be collected in the Waste Solution Collection Tank. Process waste solution
from all sources will be subjected to chemical treatment with TMT 15 (or functional equivalent)
in the Waste Solution Treatment Tank in order to precipitate dissolved mercury (see Appendix 1-
C Process Flow Diagrams).
Treated waste solution from the Waste Solution Treatment Tank will be pumped to the conical
Waste Solution Settling Tank in the waste solution treatment circuit, where precipitates will be
allowed to settle. The underflow slurry from the Waste Solution Settling Tank containing TMT
15-mercury precipitates will be periodically pumped to the Decomposition Tank to enter the
calomel treatment process.
Following treatment with TMT 15 (or functional equivalent), decanted solution from the Waste
Solution Settling Tank will be subjected to filtration (cartridge filters and activated carbon
columns) to remove any suspended solids prior to final treatment of the clarified water with
activated carbon (see Figure 1.2-11 below).
All of the treated process waste solution will be pumped to the Treated Waste Solution Storage
Tanks prior to shipment off-site for further treatment and/or disposal.
PMR RCRA Permit Application, Dry Hills Facility Page 35
JBR Environmental Consultants, Inc. | HATCH March 2013