Section R. 299.4448 - Type II landfill operation; partial and final closureRule 448.
(1) The owner and operator of a type II landfill shall design and operate the landfill so as to bring the active fill area up to final grade as soon as possible. An owner or operator may partially close a unit or portion of a unit at such time as that portion reaches final grade.(2) The owner and operator shall close each type II landfill unit in a manner that minimizes all of the following: (c) The need for further maintenance.(d) The post-closure formation and release of leachate and explosive gases to air, groundwater, or surface water to the extent necessary to protect human health and the environment.(3) Before beginning the partial or final closure of each unit, an owner and operator shall notify the director that a notice of the intent to close the unit has been placed in the operating record.(4) The owner and operator shall begin final closure activities of each unit not more than 30 days after the date on which the unit receives the known final receipt of wastes or, if the unit has remaining capacity and there is a reasonable likelihood that the unit will receive additional wastes, not more than 1 year after the most recent receipt of wastes..Extensions beyond the 1-year deadline for beginning final closure shall be granted by the director if the owner and operator demonstrate that the unit has the capacity to receive additional wastes and the owner or operator has taken and will continue to take all steps necessary to prevent threats to human health and the environment from the unclosed unit.(5) The owner and operator of all type II landfills shall complete final closure activities of each unit in accordance with the closure plan within 180 days after the beginning of final closure as specified in subrule (4) of this rule. Extensions of the closure period shall be granted by the director if the owner and operator demonstrate that final closure will, of necessity, take more than 180 days and he or she has taken, and will continue to take, all steps to prevent threats to human health and the environment from the unclosed unit.(6) Not more than 60 days after the partial or final closure of each type II landfill disposal unit, the owner and operator of such unit shall submit, to the director or his or her designee, certification by a registered professional engineer that verifies that closure has been completed in accordance with the approved closure plan. The certification shall include that information required by R 299.4921.(7) The post-closure period shall begin on the date that the final closure of a unit is certified, unless the director has reason to believe that final closure has not been in accordance with the act, these rules, or the approved closure plan or that any partial closures have not been maintained in accordance with the provisions of R 299.4449. The director, or his or her designee, shall, within 60 days of receiving a final closure certification, provide the owner or operator with a written statement of the reason or reasons for the director's belief that closure has not been in accordance with the act, these rules, or the approved closure plan.(8) The approved closure certification shall be placed in the operating record.Mich. Admin. Code R. 299.4448