Preliminary Results of the NIOSH Industrywide Study of the Fibrous Glass Industry.
NIOSH 1973 May:31 pages
Worker exposure to free silica (7631869) binding materials, and solvents was measured at four fibrous glass insulation manufacturing facilities (SIC-3231). Weight and fiber count dust sampling methods also were evaluated. The fiber count method was more effective. The mean total dust concentrations were 4.4 and 0.1 milligrams per cubic meter (mg/m3) in the pipe insulation operations of facility C and in the scrap reclamation operations of facility D, respectively. The highest single concentration was 14.5mg/m3, which was measured in the pipe insulation operations of facility C. The highest mean fiber count was 0.69 fibers per milliliter (fibers/ml) for the flame attenuated installation operations of facility C. The lowest mean fiber count was 0.04fibers/ml for three operations, one in facility A and two in facility B. The median airborne fiber diameters ranged from 1.0 to 4.3 micrometers in facilities B and A, respectively. The median airborne fiber length was 19 to 70 micrometers in the centrifugal forming operations of facility B and the flame attenuation process of facility A. The author suggests that persons exposed to very fine diameter glass fibers be given close medical surveillance.
NIOSH-Author; NIOSH-Survey; Field-Study; Glass-products; IWS-35-3b; Region-1; Mineral-dusts; Air-sampling; Air-contamination; Airborne-fibers; Air-quality-control; Control-methods; Workplace-studies;
NTIS Accession No.
NIOSH, Environmental Investigations Branch, Division of Field Studies and Clinical Investigation, 31 pages, 23 references