The group managing a former Marshall County hazardous waste site is suing more than 300 companies, municipalities and universities to recoup the cost of waste removal. LWD PRP wants to force 334 others to kick in money to cover the costs of removing a variety of hazardous pollutants from the incinerator site in Calvert City. The 32-acre plant operated from the 1950s until October 2005. LWD PRP has paid $9.5 million toward cleaning up the site through September 1. The suit, filed in U.S. District Court in Paducah, seeks a judge's order to force the defendants to contribute to the cleanup.