Establishes grant program in DEP to provide financial assistance to municipalities for infrastructure and other physical upgrades to certain municipally owned sanitary landfill facilities closed before June 1987; appropriates $10 million.

S 997 establishes a $10 million grant program within New Jersey's Department of Environmental Protection to help municipalities upgrade improperly closed sanitary landfills (those closed before June 1, 1987, without completing required closure standards). The program directly assists municipalities owning such landfills by covering costs for infrastructure improvements like methane vents, leachate systems, and capping to prevent pollution and health hazards. Applicants must submit detailed project plans, and grants cannot duplicate federal funding. Municipalities receiving grants must report annually on fund usage and project outcomes, with the Department required to submit annual program effectiveness reports to the Governor and Legislature.