(1) By January 1, 1992, the owner or operator of a landfill shall employ a certified landfill operator.

(2) For each of the following types of landfills defined in existing regulations: Inert, demolition waste, problem waste, and municipal solid waste, the department shall adopt rules classifying all landfills in each class. The factors to be considered in the classification shall include, but not be limited to, the type and amount of waste in place and projected to be disposed of at the site, whether the landfill currently meets state and federal operating criteria, the location of the landfill, and such other factors as may be determined to affect the skill, knowledge, and experience required of an operator to operate the landfill in a manner protective of human health and the environment.

(3) The rules shall identify the landfills in each class in which the owner or operator will be required to employ a certified landfill operator who is on-site at all times the landfill is operating. At a minimum, the rule shall require that owners and operators of landfills are required to employ a certified landfill operator who is on call at all times the landfill is operating.