2024 Volume 35 Issue 6 Pages 406-413
We have seen a wide range of diverse ways landfills can be reused, including parks, sports facilities, solar power generation facilities, and civic farms. Normally, maintenance of a landfill ends when its postclosure care has been finally discontinued and actual reuse of the landfill can begin. In recent years, however, there have been reports of explosions caused by flammable gases while site is being used for other purposes. This makes investigation and evaluation of the waste stabilization status crucial. Landfill gas, leachate quality, and internal temperature have been evaluated to determine decommissioning, but there is a need for multifaceted evaluation to be conducted beyond these particular indicators. A report issued in 2002 introduced follow-up indicators following post-closure care completion but in reality, these are not actively being followed. Rather than introducing follow-up indicators for post-closure care, the 2024 Report: Survey and Evaluation Methods of Aftercare Completion Criteria for Closed Landfills introduces indicators for evaluating completion of aftercare, along with updated information on existing evaluation indicators（postend of aftercare follow-up indicators）, and additional follow-up indicators that evaluate the stabilization status of currently authorized wastes. This paper describes the specific items that have been newly added.
