title: Sources and dissemination of contamination in material handling operations.
abstract: To assess the potential risks to personnel preparing feed for carcinogen bioassay research, a tracer was mixed with a meal diet to yield 10 kg batches of 100, 3,000 and 5,890 ppm. Wipe samples were obtained from horizontal and vertical surfaces, equipment and personnel before operations began, after they were completed, and following clean-up. Total and respirable suspended particulate matter samples were obtained. All operations led to contamination of clothing and equipment; cleaning did not remove all contamination. These results, obtained in a well controlled environment in which trained and well protected personnel were working, suggest that a higher level of process control may be required for adequate protection of personnel performing material handling operations with known or suspected carcinogens.
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control; D000821:Animal Feed; D002273:Carcinogens; D004780:Environment, Controlled; D004781:Environmental Exposure; D004785:Environmental Pollutants / Q000032:analysis; D005452:Fluoresceins / Q000032:analysis; D006801:Humans; D007753:Laboratories
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D002273:Carcinogens; D004785:Environmental Pollutants; D005452:Fluoresceins