Final answer:
The 'Competent person' is responsible for eliminating or isolating hazards without entering the space unless infeasibility can be demonstrated, as per OSHA regulations.
Step-by-step explanation:
The Competent person must eliminate or isolate the hazards without entering the space unless he/she/it can demonstrate that this is infeasible. The obligations under the Occupational Safety and Health Administration (OSHA) mandate that employers must ensure a safe working environment by eliminating or mitigating hazards. Proper training, the use of effective containment or ventilation systems, and informing workers about chemical hazards are some of the necessary measures for risk reduction.