(1) The floors of all rooms in which milk is handled, processed or stored, or in which milk containers or utensils are washed shall be constructed of good quality concrete, or equally impervious tile or brick laid closely with impervious joint material, or metal surfacing with impervious joints, or other material which is the equivalent of good quality concrete. The floors of storage rooms for dry ingredients and/or packaging material may be constructed of tightly joined wood.

(2) The floor surfaces shall be smooth and sloped so that there are no pools of standing water after flushing; and the joints between the floor and the walls shall be impervious.

(3) The floors shall be provided with trapped drains. Cold storage rooms used for storing milk and milk products need not be provided with floor drains when the floors are sloped to drain to one or more exits. Storage rooms for dry ingredients and/or packaging materials need not be provided with drains.

(4) The floors shall be constructed in such a manner to ensure that they can be adequately cleaned, kept clean, and kept in good repair.

(1) Walls and ceilings shall be finished with smooth, washable, light-colored painted wood, tile, smooth-surface concrete, cement plaster, brick or other equivalent materials with washable, light-colored surfaces.

(2) Walls and ceilings shall be constructed in such a manner to ensure that they can be adequately cleaned, kept clean, kept in good repair.