Survey Report: Control Technology for Manual Powder Weigh-Out Operations at Merckand Company, Wilson, North Carolina

摘要

The use of a commercially available booth for manually weighing out powderedmaterials at Merck and Company, Wilson, North Carolina was evaluated. Scoops were used by workers to transfer material from drums. Dry ice was used to visualize the flow of air. This test indicated that there were no eddies present which would force contaminated air to flow into the worker's breathing zone. Activities that caused dust exposure were identified using aerosol instrumentation. When the worker opened or closed the plastic liner of the drum, the exposure to dust was increased.