Corrosive (as used in first aid, WAC 296-307-039). A substance that causes destruction of living tissue by chemical action, including acids with a pH of 2.5 or below or caustics with a pH of 11.0 or above.

Emergency washing facilities. Emergency washing facilities are emergency showers, eyewashes, eye/face washes, hand-held drench hoses, or other similar units.

Hand-held drench hoses. Hand-held drench hoses are single-headed emergency washing devices connected to a flexible hose that can be used to irrigate and flush the face or other body parts.

Personal eyewash units. Personal eyewash units are portable, supplementary units that support plumbed units or self-contained units, or both, by delivering immediate flushing for less than fifteen minutes.

Strong irritant (as used in first aid, WAC 296-307-039). A chemical that is not corrosive, but causes a strong, temporary inflammatory effect on living tissue by chemical action at the site of contact.

Toxic chemical (as used in first aid, WAC 296-307-039). A chemical that produces serious injury or illness when absorbed through any body surface.