A worker at a chemical plant was sent to an Indianapolis hospital after being exposed to an open tank of benzene. The incident was reported around 6:15 p.m. Capt. Mike Pruitt said a 1,000-gallon tank had a crack in it and used to hold benzene, though it was now empty. He said paramedics were concerned that residual fumes may have exposed the worker to danger. The employee was decontaminated at the scene, then sent to a Hospital to be evaluated. He was alert and speaking.