A NIOSH occupational health study surveyed three Midwestern formula-feed mills and reported that overall dust levels were very high at many operations. Exposures to selected indicator compounds occasionally exceeded recommended threshold limits, although average daily concentrations were generally within suggested limits; because formulations varied, the report cautioned that the indicators might not represent every hazardous component of the environment.
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Abstract · 1
Abstract · 1
Exposures in excess of specific recommended threshold limits ... did, on occasion, occur. ... the overall dust levels were very high at many operations. ... the compounds selected for study may not have been representative of the hazardous nature of the environment.