Thirty-nine industrial units were recently slapped with "closure and disconnection of electricity' orders by the West Bengal Pollution Control Board (PCB), following Supreme Court directives on hazardous waste management. Senior PCB law officer Biswajit Mukherjee said in his order that the offending units were "operating without authorisation and failed to take proper steps for storing hazardous waste', as required under the provision of the hazardous waste (management and handling) rules, 1989.