121. The operator must comply with the requirements of sections 102, 104, 105, 108, 110 to 113 and 116 that apply to a permanently closed landfill site, for as long as the landfill is likely to be a source of contamination.
The operator must also ensure the monitoring and maintenance of the system of water table observation wells and, if applicable, the leachate collection and treatment system, the drainage system for runoff water, the continuous system for measuring and recording the flow of leachate and the biogas collection and treatment system.