HHE Report No. HETA-91-0259-2420, Tinker Air Force Base, Oklahoma City, Oklahoma.
NIOSH 1994 May:19 pages
In response to a request from civilian employees of the U.S. Air Force Logistics Command (SIC-3721) at Tinker Air Force Base, Oklahoma City, Oklahoma, an investigation was begun into possible health effects from exposure to cobalt (7440484), chromium (7440473), and nickel (7440020) in the Nozzle Shop area. The Base refurbished Air Force jet aircraft by inspecting the parts and repairing them as needed. Jet engine nozzles were refurbished in the Nozzle Shop. The damaged vanes were removed from the nozzle frame by grinding off the connecting weld using hand held portable grinders. The repair was completed by welding the new vanes in place using gas tungsten arc welding. A review was conducted of environmental monitoring data collected before and after the implementation of control measures including ventilation, use of personal protective equipment, and work practices. Medical interviews were conducted with 23 grinders and welders. The pulmonary function testing program was evaluated, and the medical screening program was reviewed. Environmental sampling data showed reductions of personal exposure levels to below the OSHA permissible exposure limits. With the exception of nickel, the recent measurements were also below the NIOSH recommended exposure levels (RELs). The authors recommend that exposure be reduced so that all exposure levels remain below the NIOSH RELs, and that measures be taken to assure continuing validity of the medical screening program.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-91-0259-2420; Hazard-Confirmed; Region-6; Metal-dusts; Dust-exposure; Aircraft-engines; Industrial-hygiene; Occupational-exposure; Pulmonary-function-tests; Medical-screening;
7440-48-4; 7440-47-3; 7440-02-0;
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-91-0259-2420, 19 pages, 24 references