HHE Report No. HETA-83-450-1468, George Rogers Clark National Historical Park, Vincennes, Indiana.
NIOSH 1984 May:11 pages
Worker exposures to asbestos (1332214) were surveyed on November 9, 1983 at the George Rogers Clark National Historical Park (SIC-8411) in Vincennes, Indiana. The evaluation was requested by an authorized representative of the US Department of the Interior, National Park Service, on behalf of an unspecified number of maintenance workers at the memorial building, in which asbestos insulation had been used for the heating pipes and ventilation ducts in the basement and roof tunnel. General area air samples and bulk insulation samples were collected for asbestos determination. All of the insulation samples contained 20 to 50 percent chrysotile (12001295), three contained 10 to 30 percent crocidolite (12001284), and one contained 1 to 2 percent amosite (12172735). No asbestos was found in the air samples. Some of the insulation had deteriorated because of water damage, but the areas in which asbestos was present were inaccessible and rarely entered by maintenance personnel. The authors conclude that an asbestos hazard does not currently exist, but a potential hazard is present since maintenance or renovation work would disturb the insulation. They note that renovation of the heating and ventilation system is planned in the near future. At that time, the insulation should be removed in accordance with approved procedures, and personal protective equipment should be used.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazards-Unconfirmed; Forestry; Region-5; Asbestos-fibers; Exposure-levels; Ventilation-systems; Insulation-materials; Air-samples; Dust-analysis; HETA-83-450-1468;
1332-21-4; 12001-29-5; 12001-28-4; 12172-73-5;
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-83-450-1468, 11 pages, 5 references