Environmental aspects of fibrous glass production and utilization. Report no. IWS-35-3-6.
NIOSH 1974 Jun; :1-26
Environmental studies were conducted to determine the health aspects of respiratory exposure to fibrous-glass (14808607). Working conditions were monitored at four facilities producing standard insulation products and in six facilities producing or using small diameter glass fibers (less than 1.0 micrometer). Airborne fiber concentrations in the four facilities producing conventional insulation products were extremely low with the highest average concentration being 0.1 fibers per milliliter (ml). The highest single concentration was 0.83 fibers/ml. The highest mean total dust concentration at these facilities was 2.73mg/m3 with the highest single measurement being 14.5mg/m3. The mean airborne concentrations in the other six facilities ranged from 1.0 to 21.9 fibers/ml with the highest single concentration being 44.1 fibers/ml. About 25 to 30 percent of these fibers were less than 5.0 micrometers in length. In the one fibrous glass plastics operation which was surveyed, no fibers less than 5.0 micrometers in length were observed. The author suggests that it is prudent that exposures to respirable glass fibers be kept at an absolute minimum through the use of appropriate engineering controls and materials handling methods.
NIOSH-Author; NIOSH-Survey; Field-Study; IWS-35-3-6; Region-3; Insulation-materials; Airborne-fibers; Fibrous-bodies; Glass-products
NTIS Accession No.
NIOSH, U.S. Department of Health, Education, and Welfare, Cincinnati, Ohio, Report No. IWS-35-3-6, 26 pages, 3 references