(a) All disposal facilities. All disposal facilities in post-closure monitoring shall perform the following.
- (1) Security and access control. Fences and locked gates shall be maintained and signs shall be posted on the outer perimeter to provide notice that the site is a closed solid waste disposal facility.
- (2) Annual post-closure report. No later than April 9th of each year after the DEQ's approval of the certification of final closure, a post-closure maintenance and monitoring report shall be submitted to the DEQ until the post-closure period ends. This report shall document the maintenance performed and summarize all monitoring data for the previous year.
(b) Land disposal facilities. Land disposal facilities in post-closure monitoring shall also perform the following.
(1) Monitoring. The integrity of the groundwater and/or explosive gas monitoring systems shall be maintained.
- (A) Groundwater monitoring shall be performed at least semi-annually, unless reduced inaccordance with OAC 252:515-9-73(c).
- (B) Explosive gas monitoring, if required during the active life, shall be performed at Least semi-annually.
(2) Leachate collection, treatment and disposal.
- (A) The leachate collection system shall be maintained and operated to ensure leachate is collected, treated and/or disposed in accordance with Subchapter 13 of this Chapter.
- (B) The leachate collection systems shall be equipped with a system for automatic and continuous removal of leachate not requiring intervention by the owner/operator.
- (C) Untreated leachate shall not be stored on-site unless the permit provides a specified method and capacity.
- (3) Final cover. The integrity and effectiveness of the final cover shall be maintained in compliance with OAC 252:515-19-53, including making repairs to the cover as necessary to correct the effects of settlement, subsidence, erosion, ponding of water, or other events, and prevent run-on and run-off from eroding or otherwise damaging the final cover.
Added at 20 Ok Reg 1151, eff 6-1-03
Amended at 23 Ok Reg 1746, eff 6-15-06
Amended at 39 Ok Reg 1074, eff 9-15-22