Interpretation of 1910.1043(h)(ii)(c)

OSHA interpretation letter clarifying that medical surveillance under 1910.1043(h)(3)(i) is required every 6 months for employees with FEV1 below 80 percent of predicted, and that a 5 percent or greater FEV1 decrement of at least 200 ml on the first working day also requires re-testing in 6 months.