An Illinois-based NRMCA producer member has begun replacing some of its rear discharge mixer trucks with a fleet fueled by compressed natural gas. Mokena-based Ozinga Ready Mix Concrete held a press conference in late June in conjunction with South Shore Clean Cities. Company officials expect the savings in fuel costs will give them a return on their investment in just three years. "Natural gas far exceeded any other option available," Tom Ozinga said. Compressed natural gas will help the company reduce its reliance on foreign oil, reduce its diesel emissions and reduce the overall cost of fuel.