Walk-Through Survey Report at Union Carbide Corporation, King City, California, Report No. CT-112-21a.
NIOSH 1982 Oct:8 pages
An on site visit was made to the Union Carbide Corporation (SIC- 3292), King City, California, to evaluate control methods for dry material bagging operations. Union Carbide produced a short fiber asbestos (1332214) product. Each packaging area had a conveyor and palletizing area. The asbestos mill had a workforce of about 100 workers. Three types of bags were used: plastic valve bags, paper pasted valve bags, and a hand tuck valve bag. Engineering controls were in operation around each packaging station including exhaust ventilation and enclosures for parts of the bag handling system. Each packer unit had its own dust collector. When paper bags were used, each bag was individually shrink wrapped. Pallet loads were stretch wrapped before shipment. A central vacuum system, portable vacuum cleaners and wet washing were used to clean the floors. Water was used to control dust on the ore stockpile. Lead filled vinyl curtains were used around vertical grinders for both dust and noise control. Ore was wetted before beneficiation and product pelletizing to control dust. Airborne asbestos concentrations in all mill areas were below the standard of 2 fibers/cubic centimeter (f/cc). The author concludes that this facility demonstrates control methods worthy of an in depth evaluation, including the enclosures under negative pressure between the packer and past the bag flattener, the enclosed capture door for the bagger, the shrink and stretch wrapping operations, and automatic palletizer.
NIOSH-Author; NIOSH-Survey; Field-Study; Region-9; CT-112-21a; Dust-control; Airborne-dusts; Mineral-dusts; Asbestos-products; Pulmonary-system-disorders; Control-technology;
Field Studies; Control Technology
NTIS Accession No.
Asthma and Chronic Obstructive Pulmonary Disease; Disease and Injury; Pulmonary-system-disorders; Control Technology and Personal Protective Equipment; Research Tools and Approaches;
Engineering Control Technology Branch, NIOSH, Cincinnati, Ohio, Report No. CT-112-21a, 8 pages