When sufficient ventilation cannot be obtained without blocking the means of access employees must be protected by and there should be an assigned employee outside of the confined space to?

When sufficient ventilation cannot be obtained in a confined space without blocking access, employees must be protected by appropriate personal protective equipment (PPE), such as respirators. Additionally, there should be an assigned employee outside the confined space to monitor the situation, provide assistance if needed, and communicate with those inside. This ensures that help is readily available in case of an emergency. Proper training and adherence to safety protocols are crucial to minimize risks.