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Pig manure contains a wide variety of corrosion-inducing chemicals such as ammonia. Ammonia production and its release are influenced by temperature and moisture in the barn environment, as well as number and size of the pigs. High levels of ammonia can negatively affect pig health and growth, as well as pose a risk to human health. The OSHA Permissible Exposure Limit for an 8-hour workday is 50 parts per million.
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