The US Environmental Protection Agency (EPA) and industry groups including cement producers have failed to settle a permit dispute that is testing whether the agency has the authority to require operators of hazardous waste combustion units to conduct risk assessments that can be used to strengthen emissions limits for mercury and other pollutants when renewing the facilities' existing waste and air permits. Negotiations stalled during a meeting in November 2013 between EPA lawyers and cement kiln operators at EPA's Region V offices, according to an 8 January 2014 status report the parties filed with the Environmental Appeals Board (EAB). Litigation will continue on 20 February 2014.