Rooms in slaughterhouses for killing and dressing shall be separated by partitions from other parts of the building. Every room, except refrigeration and cold storage rooms, shall have adequate hand-washing facilities. All rooms shall be well ventilated and shall be kept free from excessive odors and condensation. All rooms shall be lighted so as to provide adequate illumination at all working surfaces. All killing rooms shall have available hot and cold water under pressure. (Mont. Co. Code 1965, § 101-9.)