Which hazard control involves removing air contaminants from a space?

The correct choice involves a method specifically focused on eliminating hazardous air contaminants within a confined space, which is critical for ensuring a safe working environment. This process of flushing can involve the introduction of fresh air into the space or the use of specialized ventilation systems to displace or dilute the harmful substances present. By actively removing or reducing these contaminants, workers are less likely to be exposed to dangerous gases, vapors, or dust that could pose significant health risks.

In a confined space, where air circulation is limited, the importance of effectively managing air quality becomes paramount. Controlling air quality through flushing not only enhances safety but is often a pivotal step before conducting further work in such environments.

Other methods mentioned, such as isolation and LOTO (Lockout/Tagout), are critical for ensuring that machinery is safely shut down and that workers are protected from uncontrolled release of energy. Blanking, on the other hand, refers to blocking off the opening of pipes or vessels to prevent accidental releases, which is more applicable to preventing fluid or gas escape rather than managing air quality. Each of these alternatives highlights different aspects of safety in confined spaces but does not specifically target the removal of air contaminants as flushing does.