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

13.0 CLOSURE AND POST-CLOSURE – 40 CFR 270.14(b)(13)
Clean closure is planned for the proposed TSF. Clean closure will be practical, because the
design of the proposed TSF does not include any land based units. Clean closure of the site by
removal of all structures is presented in the Closure Plan found in Appendix 13-A. Alternative
clean closure options may be considered at the time of closure. Closure plan requirements that
are applicable only to land based units are indicated as “not applicable” for this permit
application.
A closure cost estimate based on demolition removal of the proposed TSF will be conservative
for all other options considered, because demolition and complete removal of the facility will
require the most planning, resources, and effort.
13.1 Closure Performance Standards – 40 CFR 264.111
The clean closure described in Appendix 13-A meets each of the performance standards
identified below.
13.1.1 Minimize Maintenance – 40 CFR 264.111(a)
At the end of closure, the land will be graded to blend with surrounding topography. The area
will be seeded with a native mix to promote vegetation. PMR will monitor the site for two years
to assess the successfulness of the revegetation effort. Based upon the first year assessment,
supplemental seeding will occur at the end of the first growing season, if necessary. Upon
successful revegetation of the area, neither future maintenance nor care will be necessary.
13.1.2 Prevent Post Closure Release – 40 CFR 264.111(b) & 264.603
No hazardous wastes are expected to remain after clean closure, because the waste and structures
will be removed from the site. With no potential source, a future release will be prevented.
13.1.3 Unit-specific Closure Requirements – 40 CFR 270.14(b)(13), 264.111(c), &
264.112(b)(5)
General closure activities for the specific types of areas and treatment units within the proposed
TSF can be found in Appendix 13-A.
13.1.4 Partial Closure – 40 CFR 264.112(b)
Partial closure at the proposed TSF will be closure of one or more units prior to closure of the
entire proposed TSF. In this case, partial closure will follow all of the stages for a specific unit
outlined in Appendix 13-A. No separate Closure Plan has been developed for partial closure of
the proposed TSF.
13.2 Closure Plan Requirements – 40 CFR 264.112(b)
The proposed TSF will be closed in accordance with the requirements for closure of containers
and container storage areas, tanks within a secondary containment area, and miscellaneous units
PMR RCRA Permit Application, Dry Hills Facility Page 88
JBR Environmental Consultants, Inc. | HATCH March 2013