Be constructed in such a manner that floors, walls and ceilings may be adequately cleaned and kept clean and in good repair; that drip or condensate from fixtures, ducts and pipes does not contaminate food, food contact surfaces or food packaging materials; and that aisles or working spaces are provided between equipment and walls, and are adequately unobstructed and of adequate width to permit employees to perform their duties and to protect against contaminating food or food contact surfaces with clothing or personal contact.