(1) Floors.

(a) The floors of every room in a laundry that are used for washing purposes must be properly constructed of cement, tile, or similar material. The floors must be watertight, free from projections, crevices, or dangerous gradients. They must be maintained in good repair and drained so that no water may accumulate.

(b) The floors of every room except washrooms must be constructed of hardwood or any impervious material, free from protruding nails, splinters, or loose boards, and must be so maintained.

(2) Table tops, shelves, and machine woodwork. Table tops, shelves, and machine woodwork must be constructed of materials properly surfaced, finished free from splinters, and so maintained.

(3) Markers. Markers and others handling soiled clothes must be warned against touching the eyes, mouth, or any part of the body on which the skin has been broken by a scratch or abrasion; and they must be cautioned not to touch or eat food until their hands have been thoroughly washed.

(4) Ventilation. Where artificial ventilation is necessary to the maintenance of comfortable working conditions, an adequate ventilating system must be installed as specified in chapter 296-62 WAC, Part L of the general occupational health standards.

(5) Instruction of employees. Employees must be properly instructed as to the hazards of their work and be instructed in safe practices, by bulletins, printed rules, and verbal instructions.