What is a noise exposure limit for operating engineers as per OSHA?

The noise exposure limit set by OSHA for operating engineers is 90 dBA over an 8-hour workday. This standard is put in place to protect workers from hearing loss due to prolonged exposure to high noise levels. The dBA scale measures sound levels in a way that is more closely aligned with the human perception of loudness, making it particularly relevant for assessing the risk of noise-induced hearing damage.

Exposure to noise levels at or above this threshold can lead to irreversible hearing loss if proper precautions are not taken. When working environments exceed 90 dBA, employers are required to implement a hearing conservation program, which includes monitoring noise levels, providing training, and offering hearing protection to workers. This approach helps in safeguarding the long-term hearing health of the workforce.

The other options involve higher noise exposure limits, which would not align with the standards set by OSHA for safe hearing practices. Thus, the selection of 90 dBA correctly reflects the guidelines meant to ensure worker safety in noisy environments.