MSHA Issues Health Alert Concerning Ammonia Exposure

The Mine Safety and Health Administration (MSHA), on February 16, issued a health alert regarding the dangers of ammonia exposure in mining operations.

The alert noted that "exposure to high levels of ammonia can cause serious health effects involving the eyes, lungs, and skin."

The agency said that miners working with or around ammonia should take caution.  They should use engineering controls, such as ventilation, and if respirators are in use, ensure that an ammonia-specific filter cartridge is used.

Exposure Limits 
The Threshold Limit Value-Time Weighted Average (TLV-TWA) for ammonia is 25 ppm. Ammonia is Immediately Dangerous to Life and Health (IDLH) at 300 ppm. 

First Aid
If ammonia gas is inhaled, relocate the person to fresh air. If liquid ammonia contacts the body, remove contaminated clothes and rinse with water for at least 15 minutes. Immediately seek medical aid. Stay informed on your required site-specific hazard awareness training including hazardous materials, warning signals, and evacuation procedures.