HARRISBURG — Range Resources Corp., Pennsylvania’s most active shale gas driller, has pleaded no contest to environmental crimes over its handling of contamination at a pair of well sites, the state attorney general’s office announced Friday.

The Fort Worth, Texas-based company pleaded no contest in Washington County Court to seven misdemeanor counts, including violations of the Solid Waste Management Act and illegal discharge of industrial wastes. As part of its plea, Range will pay $50,000 in fines and make $100,000 in charitable contributions to a pair of watershed groups.

The charges are the first to come out of a 2-year grand jury investigation into Pennsylvania’s huge Marcellus Shale gas industry.