In-depth survey report: evaluation of brake drum service controls at United States Postal Service vehicle maintenance facility, Louisville, Kentucky, report no. CT-152-11b.
Cooper-TC; Sheehy-JW; O'Brien-DM; McGlothlin-JD; Todd-WF
NIOSH 1987 Dec:33 pages
A control technology assessment of various methods to control worker exposure to asbestos (1332214) during brake repair was reported for the Vehicle Maintenance Facility at the U.S. Post Office Building (SIC-4311) in Louisville, Kentucky. Body and paint shops were partitioned from the main shop area. Eleven mechanics were employed, working overlapping 8 hour day shifts. All mechanics performed brake service with a total of 28 to 36 brake inspections and replacements each week. Three air handling units provided heated make up air for repair areas. Six below floor vents and four ceiling hoses were exhausted through a centrifugal ceiling fan suspended from the roof. A water wash spray booth was available. Studies were done during 11 separate small vehicle brake repairs or inspections. Dust respirators were worn during operations. A vacuum enclosure brake dust control unit was used which had a single rubber glove and four filters. Used filters were placed in a metal container which was filled with concrete and disposed of with ordinary garbage. The floor was painted once a year and pumice was added to produce a nonskid surface. It was thoroughly cleaned each Saturday. Personal and area air samples were analyzed by NIOSH Method 7400 and electron microscopy. Highest exposure occurred during brake drum removal. Results indicated that effective control of asbestos dust was achieved with the system used; one of 22 samples had a detectable level. Recommendations for better work practices were presented.
NIOSH-Author; Region-4; NIOSH-Survey; Field-Study; CT-152-11B; Airborne-dusts; Dust-inhalation; Asbestos-dust; Control-methods; Occupational-exposure; Protective-equipment; Automobile-repair-shops; Fibrous-bodies
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health