Technical Assistance Report Number TA-80-79-753 at U.S. Postal Inspection Service, Atlanta, Georgia.
NIOSH 1980 Oct:8 pages
Exposure to lead (7439921) (Pb) was investigated at the United States Postal Inspection Service (SIC-9999) in Atlanta, Georgia, on June 18, 1980, in response to a request from a postal official. Personal and general area air samples were collected during two qualifications firing periods. A total of 640 and 60 rounds were fired from handguns and from a shotgun, respectively. Four shooters and a Rangemaster participated. Samples were analyzed using atomic absorption spectrophotometry. Air velocity was measured to determine the adequacy of the ventilation. Average Pb concentrations for handgun firing ranged from 390 to 902 micrograms per cubic meter, with an 8 hour time weighted average (TWA) of 57 to 115 micrograms per cubic meter. All personal air samples, except the Rangemaster's, were in excess of the recommended OSHA exposure limit of 50 micrograms per cubic meter. No Pb was detected from shotgun firing. Average air flow through the shooting stalls ranged from 5 to 30 feet per minute (FPM), as compared to the recommended 50FPM. The authors recommend that 20 to 40 percent of the air be exhausted from ceiling height 10 to 20 feet down range of the stalls, and 60 to 80 percent be exhausted at the end of the range behind the bullet trap. Exhaust air should exceed supply air to create a negative pressure system and avoid contamination of neighboring areas.
NIOSH-Author; NIOSH-Technical-Assistance-Report; TA-80-79-753; Hazards-Confirmed; Health-surveys; Region-4; Workplace-studies; Air-contamination; Industrial-processes; Control-methods; Air-sampling; Metallic-poisons; Heavy-metals;
Hazard Evaluation and Technical Assistance; Field Studies
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, Division of Surveillance, Hazard Evaluations, and Field Studies, NIOSH, Cincinnati, Ohio, 8 pages, 5 references