Fire Down Below (1997)

EPA agent Jack Taggart has set out on assignment to discover the killer of his most trusted colleague. Following the agent's last known path, Taggart travels through Appalachia only to discover lethal chemical dumping sites of cyanide, benzene, and dTCE. The people in the region are getting sick and whoever is responsible for the dumping is being protected by a wall of silence. Infiltrating the community, Taggart centers his investigation around mining tycoon Orin Hanner who is tied to those mines being used for the illegal dumping. Taggart also meets Sarah Kellogg who protects a family secret that may lead to an ecological disaster.