A. The owner and operator of any solid waste landfill permitted under this chapter shall be responsible for ensuring that such landfill is properly closed in accordance with the Board's regulations and that the landfill is maintained and monitored after closure so as to protect human health and the environment. Maintenance and monitoring of solid waste landfills after closure shall be in accordance with the Board's regulations. At all times during the operational life of a solid waste landfill, the owner and operator shall provide to the Director satisfactory evidence of financial assurance consistent with all federal and state laws and regulations to ensure that the landfill will be:

1. Closed in accordance with the Board's regulations and the closure plan approved for the landfill; and

2. Monitored and maintained after closure, for such period of time as provided in the Board's regulations or for such additional period as the Director shall determine is necessary, in accordance with a postclosure plan approved by the Director.

B. Not less than 180 days prior to the completion of the postclosure monitoring and maintenance period as prescribed by the Board's regulations or by the Director, the owner or operator shall submit to the Director a certificate, signed by a professional engineer licensed in the Commonwealth, that postclosure monitoring and maintenance have been completed in accordance with the postclosure plan. The certificate shall be accompanied by an evaluation, prepared by a professional engineer licensed in the Commonwealth and signed by the owner or operator, assessing and evaluating the landfill's potential for harm to human health and the environment in the event that postclosure monitoring and maintenance are discontinued. If the Director determines that continued postclosure monitoring or maintenance is necessary to prevent harm to human health or the environment, he shall extend the postclosure period for such additional time as the Director deems necessary to protect human health and the environment and shall direct the owner or operator to submit a revised postclosure plan and to continue postclosure monitoring and maintenance in accordance therewith. Requirements for financial assurance as set forth in subsection A shall apply throughout such extended postclosure period.

1999, cc. 584, 613, 947.