<<< Back to OSHA's New National Emphasis Program: Crystalline Silica Link to Printing InstructionsPrinting Instructions | Text Version
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Slide 10


    Title: Exposure to Crystalline Silica

    • High historical exposures
      - Sandblasting
      - Mining (regulated by MSHA)
      - Tunneling
      - Granite cutting
      - Sand-casting foundry operations
    • Other exposures—see Appendix B, "Industries with Potential Overexposure to Silica"
    [Includes image of a person sandblasting and the OSHA logo]

    Speaker Notes:

    From 1990-1999, the industries regulated by OSHA that were most frequently recorded on U.S. death certificates for silicosis-related deaths were
       Construction 13.4%
       Blast furnaces, steelworks, rolling and finishing mills 5.8%
       Iron and steel foundries 5.5%

    Jobs in construction with high silica exposures are
       Tunnel and road construction
       Excavation and earth moving
       Masonry and concrete work

    Exposures in general industry include
    --Foundries: production of sand-based moles and cores, shakeout and knockout; finishing and grinding operations
    --Manufacturing: use of silica as a raw material t produce concrete, brick, tile, porcelain, pottery, glass, abrasives, paints, and plastics
    --Electronics industry: use of rock quartz
    --Agricultural services sector: sorting, grading, and washing areas of food processing operations for crops such as potatoes and beans
    --Food & beverage processing: use of calcined diatomaceous earth (containing cristobalite) as a filter
    --Maintenance and repair of refractory brick linings of rotary kilns and cupola
    --Metal refinishing: sandblasting