62 Pa. Stat. § 308
The department shall have the power to lease, for a period not to exceed ten years, with the right to renewal for one further term not to exceed ten years, on such terms as may be considered reasonable by the secretary, a portion of the lands of the Commonwealth at any institution under its supervision to any municipality or municipalities adjacent thereto for the use by the municipality or municipalities in common with the State institution for disposal of garbage, refuse and ashes, by depositing them in compact layers of controlled depth and width in trenches or depressions and covering each layer promptly on all sides with a compact layer of clean earth or other inorganic material of sufficient thickness to exclude rodents and to prevent the escape of odors or outbreak of fires, such method of disposal being commonly known as sanitary land fill.
62 P.S. § 308