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

storage area (e.g., storage racks), decontamination of the area (dry sweep), and sampling and
analysis for the area.
Since CostPro does not include a “miscellaneous units” section, closure of the retort system is
found in the “boiler and industrial furnace” section. This section includes costs for removing any
waste residue present, decontamination of the two units by conducting a 72-hour “burn,”
disassembly and removal of the two units and the associated equipment (e.g., dust collector,
ductwork, etc.), and sampling and analysis of the equipment and area. Transportation and
disposal costs of the equipment are included in the container section and are not duplicated in
this section.
The tank section of the estimate includes all storage and processing tanks at the proposed TSF. It
also encompasses the filter press and the packed tower SO2 scrubber. These units did not readily
fit in other sections. The tank section includes removal of waste from the tank systems, followed
by a purge and flush. This section also includes the standard line items specific to the tanks,
which include: removal, transportation, and disposal of the stored waste; demolition of the tank
secondary containment, decontamination of the area, and sampling and analysis of the area.
Engineering and Contingency Rates
The closure cost estimate program adds a percentage to the subtotal to account for contingencies
and engineering oversight required for a third party to accomplish the work. The engineering
oversight cost is estimated at 7% and the contingency is estimated at 20% of the total.
15.2.3 Closure Cost Estimate Values
As discussed in Section 15.2.1, three different closure cost estimates were calculated based on
the three different arrangements that maximize the different types of stored hazardous waste
allowed by the FSSMP. These arrangements are presented in Table 15.2-1.
Table 15.2-1: Arrangements of Maximum Foreseeable Stored Hazardous Waste Inventory
Quantity
Maximum Foreseeable Stored Hazardous Waste Inventory
Arrangement 1 Arrangement 2 Arrangement 3
Number of pigs 1024 16 16
Number of drums of
76 330 4
calomel
Number of drums of spent
activated carbon
60 4 346
Summaries of the closure cost estimates for Arrangement 1, Arrangement 2, and Arrangement 3
are presented in Table 15.2-2.
PMR RCRA Permit Application, Dry Hills Facility Page 95
JBR Environmental Consultants, Inc. | HATCH March 2013