Members of the United Auto Workers Local 9-9-7 union walked off the job at a Grinnell plastics plant last night after one of the union members was fired. President Pat Teed says they’ve been in negotiations with the company and the firing at the E-P-C plant was wrong. He says they’re preparing charges to file with the National Labor Relations Board, and those charges will explain everything. Teed E-P-C and the union have held negotiations about labor and safety standards, but no contact has been made today.E-P-C Plant manager John Olson said negotiation sessions have gone on with no problems, and he doesn’t know why the union decided to walk out. He says they haven’t heard from anybody. He says they’re waiting for them, as the union workers walked off the job and didn’t say why. Olson was asked if the company would take any action if they didn’t hear from the union soon. He says he’s waiting to hear from them, and says anything is possible, but it’s unlikely. The plant employs around 275 people, including non-union management employees.