CLAIRTON, Pa.—(WPXI)-In August, two employees died and several others were injured during a battery explosion at Clairton Coke Works. Now, the U.S. Chemical Safety and Hazard Investigation Board issued two safety recommendations for US Steel. They are to be implemented immediately. The CSB is recommending that U.S. Steel evaluate all buildings that could be occupied and assess any potential danger to workers based on where the buildings are located. The CSB said the occupied buildings in the area where the explosion happened were not capable of protecting workers from the blast. The agency also said that while US Steel has relocated the control rooms for battery 13/14 to another building 100 feet away, it’s not clear that it is a safe location for workers. The second recommendation is calling on U.S. Steel to address and reduce safety risks for its employees. The CSB is continuing its investigation.