29 CFR 1926.62 does not allow exemptions or exceptions to the exposure assessment requirements, regardless of the protective measures used. Exposure assessment data are useful in determining the extent of exposure in the event of a respirator failure or other exposure incident. The data can be used to help differentiate between exposures attributable to occupational sources and those attributable to non- occupational sources in the event that an employee experiences symptoms related to lead exposure or biological monitoring indicates an elevation in blood lead levels. Exposure assessment provides data that can be helpful in communicating to employees their exposures and the measures being taken to protect them from the possible adverse effects of overexposure. Historical records of employee exposure levels are necessary for epidemiological purposes.
Air monitoring is often necessary to determine site control boundaries.
In addition, exposure assessment demonstrates diligence on the part of the employer in accurately and objectively evaluating exposures to ensure that appropriate protective measures are implemented. Employers are required to ensure that employees are adequately protected. As the level of PPE becomes more stringent, the potential for hazards such as heat stress, impaired peripheral vision, and impaired mobility increases. An unacceptable precedent is established if employers are permitted to assign the maximum level of protection in lieu of characterizing employee exposures to make hazard control decisions.