Investigation on Shortening of Post Closure Duration in a Hazardous Waste Landfill

Secured Landfill or Hazardous Waste landfill is an engineered structure that is fully
equipped with standards regulated components necessary to prevent any waste
contaminants from polluting the environment and harming human health. As the
landfill reaches its service life, the landfill is required to be closed and subjected to
30 years of post-closure care. An extensive post closure care period demands
significant funding and resources to cover the cost of landfill aftercare. Aside from
financial issue, post-closure care of hazardous waste landfill is emphasized to ensure
maximum protection towards the environment and human health. In this case,
reduction in post closure care period is believed to be a solution to the problem.
Thus, this study aims to determine the completion criteria of post-closure care and
investigates on the reduction of post closure care period in a hazardous waste
landfill. The completion of the landfill post closure care was assessed based on three
approaches which were impact/risk assessment approach, performance based
approach and target values approach.