A state investigation sparked by a local environmentalist who rented an airplane to gather photographic evidence has revealed an unreported contaminate release at a natural gas drilling site in Wayne County. A preliminary investigation of the Oregon Twp. well pad, operated by Chesapeake Appalachia, found in October that a "weathered petroleum product" of unknown quantity was discharged onto the site and into a forested area, in breach of state environmental laws, according to the notice of violation issued by the state Department of Environmental Protection. The drilling firm reported no incidents, and DEP had been unaware of any problem. But...