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Related Experiment Videos

A multiyear workplace-monitoring program for refractory ceramic fibers

L D Maxim1, W P Kelly, T Walters

  • 1Everest Consulting Associates, Cranbury, New Jersey 08512, USA.

Regulatory Toxicology and Pharmacology : RTP
|December 1, 1994
PubMed
Summary

Workplace monitoring of refractory ceramic fibers (RCF) shows 93% of exposures are below the recommended guideline. A Product Stewardship Program (PSP) effectively lowers RCF exposure levels in industrial settings.

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Area of Science:

  • Occupational Health and Safety
  • Industrial Hygiene
  • Environmental Science

Background:

  • Refractory Ceramic Fibers (RCF) are used in high-temperature industrial applications.
  • Previous animal bioassay and epidemiological studies have raised concerns regarding RCF exposure.
  • The Refractory Ceramic Fibers Coalition (RCFC) developed a Product Stewardship Program (PSP) in cooperation with the U.S. Environmental Protection Agency (EPA).

Purpose of the Study:

  • To summarize interim results of a 5-year workplace monitoring program for RCF.
  • To assess the effectiveness of the RCFC's Product Stewardship Program (PSP) in reducing workplace exposure.
  • To analyze RCF concentration data across different job classifications.

Main Methods:

  • Collected 720 time-weighted average (TWA) workplace concentration measurements annually.

Related Experiment Videos

  • Measurements were taken from manufacturing, processing, and user RCF plants.
  • Data were partitioned among 8 functional job classifications.

    • Main Results:

    • Workplace airborne RCF concentrations are approximately log-normally distributed.
    • 93% of workplace TWAs were below the industry guideline of 1 fiber per cubic centimeter (f/cc).
    • Significant differences in average RCF concentrations were observed among job types, and PSP activities demonstrated effectiveness in reducing exposure.

    Conclusions:

    • The RCF industry's Product Stewardship Program (PSP) is effective in lowering workplace exposure.
    • Cooperative efforts between industry and regulatory agencies can lead to successful exposure reduction.
    • Workplace monitoring provides valuable data for assessing and managing occupational exposures to RCF.