Exposure Estimation Procedure for Powder Handling Operations Based on Dustiness Testing.
NIOSH 1989 Nov:10 pages
A dustiness test result may be an indication of the dustiness of a given material and may be used to evaluate the dust exposure potential of powders undergoing a Premanufacturing Notice (PMN) review. A correlation between dust exposures and the Midwest Research Institute (MRI) dustiness test was evaluated for use in estimating the dust exposure potential of new powders undergoing PMN review. The exposure estimation procedure was based on dustiness test results because of difficulties in estimating from physical parameters. The data for the correlation were obtained at one bag filling operation at a plastic resin facility and at a bag filling and bag packing operation at a lead-chromate (7758976) facility. The correlation between worker dust exposure and dustiness as measured by the MRI and the Heubach dustiness tests was evaluated. The MRI dustiness test data and the worker exposure data were combined into a single data set containing 75 data points. The information suggested that reducing the dustiness below about 30, as measured by the MRI dustiness index, does not result in further reduction of worker dust exposure. For facilities with reasonable engineering controls and process equipment, the logic derived in this report will probably result in overestimates of worker dust exposures.
NIOSH-Author; Dust-exposure; Airborne-particles; Airborne-dusts; Plastics-industry; Chemical-manufacturing-industry; Dust-control;
NTIS Accession No.
Engineering Control Technology Branch, Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio, 10 pages, 6 references