Thread: Ammonia, Anhydrous
01-06-2000, 12:31 PM #1gott69Firehouse.com Guest
Does any department respond to fertilizer companies that have Anhydrous Ammonia?
What is your protocol?
01-25-2000, 06:19 PM #2TEAM-1 Emergency ServicesFirehouse.com Guest
01-25-2000, 06:20 PM #3TEAM-1 Emergency ServicesFirehouse.com Guest
Knock Vapour down with Fog
Collect run off
Do not approach unless in Level A Suits
03-16-2000, 09:36 AM #4EchelonFirehouse.com Guest
It is not always necessary to wear Level "A" suits to respond to an anhydrous ammonia leak. It would depend on the environmental make up of the incident ( wind direction, indoors/outdoors and geographical layout- lay of the land) Level "A" suits are only necessary when vapor concentrations exceed skin exposure limits. References quote(company MSDS sheets) levels excess of 5000ppm are considered a skin hazard. Response companies with the ability to do proper risk assessement and monitoring can quantify these levels. History will show that most ammonia leaks can be reponded to in SCBA only where concentrations are below 5000ppm. Water fog techniques will work well to knock down ammonia vapor clouds, but since the absorption ratio is so high, stopping the leak should be the main objective. Incredible ammounts of water would be needed to completely absorb a release of anhydrous ammonia. Water fog should be directed away from valves and piping due to the formation of highly corrosive liquid which may degrade or cause valves and fittings to fail. All run off should be contained and prevented from impacting the environment. If you would like additional information please call us at 1.877.378.7745.
[This message has been edited by Echelon (edited March 16, 2000).]
03-21-2000, 06:38 PM #5hazmaterFirehouse.com Guest
For an exterior spill, consider using a tarp over the tank dome to condense the Anhydrous NH3 to aqua NH3. Tarps undereneath will contain condensed NH3. Much easier to control and cleanup.
Smaller interior may be controlled with large CO2 extinguisher to turn NH3 to Ammonium Carbonate.
Very important to utilize air monitoring for NH3 so entry team aware when nearing LEL.
With proper advanced training, the best technique I've seen is to flare the NH3. This is a technique that should only be undertaken by a trained, experienced team.
The Watsonville, CA FD is probably the best trained team to respond to NH3. Anyone on their HM team could provide you with further info.
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