The hierarchy of controls shows us that engineering controls can protect workers by eliminating or reducing hazardous conditions to acceptable exposure levels. The idea behind the hierarchy is that the control methods at the top of the graphic are potentially more effective and protective than those at the bottom. Following the hierarchy of controls can lead to safer systems, where the risk of illness or injury has been substantially reduced. Examples of controls include elimination, substitution, local exhaust ventilation to capture and remove airborne emissions, or machine guards to protect the worker. Well-designed engineering controls can be highly effective in
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