Pyrite is a mineral that is commonly found in dark shales such as the Marcellus Shale. When oxidized, pyrite can damage certain storage pit liners and contaminate water with acid discharge. At Marcellus well sites in New York, cuttings would be stored either in lined pits or steel tanks if the cuttings are dry. If the well has been drilled with oil-based muds, the cuttings must be contained within tanks and disposed of in an off-site solid waste facility