HHE Report No. HETA-93-1037-2541, Johnson Brothers Company, Pittsburgh, Pennsylvania.
NIOSH 1995 Nov:31 pages
In response to a management request from Johnson Brothers Company (SIC-1721), Pittsburgh, Pennsylvania, an investigation was begun into possible health hazards at steel plate sandblasting and painting operations. The company employed about 20 workers in the surface preparation and painting of steel plate water tanks at sites throughout the country. Environmental sampling was perform at two sites in Pennsylvania. Workers were noted to be overexposed to crystalline silica (14808607) during tank interior sandblasting and shoveling operations at the Pike County site. Airborne concentrations of respirable silica during blasting exceeded the recommended exposure limit (REL) from NIOSH by a factor of 300 to 540. An abrasive blasting hood with an assigned protection factor (APF) of only 25 was used. During sand shoveling operations the REL was exceeded by a factor of 94 while the respirator with an APF of only 10 was used. Deficiencies were noted in the respiratory protection and hearing conservation programs at the site. Eleven of the 13 employees at these sites participated in the medical evaluation. Three had abnormal spirometry test results, and an obstructive pattern of abnormalities. The authors conclude that a health hazard existed at the time of the survey due to exposure to respirable crystalline silica. The authors recommend that effective respiratory protection, hearing conservation, and medical surveillance programs be implemented, and a less toxic abrasive blasting material be used.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-1037-2541; Region-3; Hazard-Confirmed; Respiratory-system-disorders; Dust-exposure; Respiratory-protective-equipment; Occupational-exposure; Silica-dusts;
Hazard Evaluation and Technical Assistance;
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-93-1037-2541, 31 pages, 40 references