A couple who say their water was contaminated by natural gas drilling and leaks from a drilling wastewater pond near their property have sued oil and gas company Range Resources. The lawsuit by Christopher and Janet Lauff, of McDonald, contends they had to forgo well water and connect to a public water line, for which they've not been compensated by Range Resources Corp. The Fort Worth, Texas-based drilling firm was still evaluating the lawsuit but had "not seen any evidence of health or environmental impacts," its spokesman Matt Pitzarella said.