http://t0.gstatic.com/images?q=tbn:ANd9GcQTo653lC1kDIDCky11n0qVW1GMkojuSmYLOyJoH89gmWPwVtk5Columbus Foods, the venerable San Francisco Bay Area maker of premium specialty meats, is raising the bar in food safety technology with a $7 million investment in a reconfigured ammonia refrigeration system at its South San Francisco facility. More >