Elimination and Engineering is the best method of hazard control and involves engineering out or substitution of the hazard. Where possible, engineering controls should always be the employer’s first option. Elimination (including substitution): remove the hazard from the workplace, or substitute (replace) hazardous materials or machines with less hazardous ones. Engineering Controls: includes designs or modifications to plants, equipment, ventilation systems, and processes that reduce the source of exposure. Examples include: Building a catwalk with handrails and replacing a portable ladder with a permanent access ladder for maintenance procedures Building a sound-dampening enclosure around a piece of loud equipment to reduce workers' noise exposure Replacing a harmful chemical with a less hazardous product Ventilation in a building, Firewater systems.

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