MEC&F Expert Engineers : A FIVE-GALLON BUCKET OF TRICHLOR WAS IN THE BED OF A POOL CLEANER'S PICKUP TRUCK WHEN IT BEGAN SMOKING AND CAUGHT ON FIRE, CREATING A HAZMAT SITUATION IN TEMPE, ARIZONA

Tuesday, April 7, 2015

A FIVE-GALLON BUCKET OF TRICHLOR WAS IN THE BED OF A POOL CLEANER'S PICKUP TRUCK WHEN IT BEGAN SMOKING AND CAUGHT ON FIRE, CREATING A HAZMAT SITUATION IN TEMPE, ARIZONA







APRIL 6, 2015

TEMPE, AZ (KPHO/KTVK)

An incident with a pool cleaning chemical led to an emergency hazardous response by the Tempe Fire Medical Rescue Department.It happened on Monday morning on Wilson Street, near 6th Street, in a residential area near Arizona State University.
A five-gallon bucket of Trichlor was in the bed of a pool cleaner's pickup truck when it began smoking and caught on fire, according to Tempe Fire. The man who was driving the truck removed the bucket from his truck and put it in the street.

"That was an extremely risky thing he did," said Assistant Chief Paul Nies with Tempe Fire Medical Rescue. "This was off-gassing very dangerous chemicals chlorine being the least of them. I don't want to go into a chemistry lesson here, but his best option was to (have) just walked away."

A bomb squad was called to the scene to help evaluate the situation.

Firefighters on the scene said that Trichlor can be very explosive, but they do not know why the bucket started smoking.

Nobody was hurt, and no residents were in danger.

"It may have damaged his truck, but breathing those chemicals has a potentially lifelong injury associated with that," Nies said.

Firefighters closed the street where the bucket was burning while they let the material burn out on its own.

Trichlor (and most other cleaning or oxidizing chemicals) should never be exposed to heat, as it will decompose them releasing the gases we saw above.

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Safe Use of Swimming Pool Chemicals
There are two main types of chlorinating agents:


  • Inorganic chlorinating agents such as calcium hypochlorite, lithium hypochlorite, and sodium hypochlorite
  • Organic chlorinating agents such as trichloroisocyanuric acid, potassium dichloroisocyanurate, and sodium dichlorocyanurate

Organic and inorganic chlorinating agents are not compatible with each other. Many incidents have occurred due to mixing of these chemicals. When combined they can form an explosive mixture. 

Tips for handling pool chemicals
DO


  • Read and follow instructions carefully. If there is anything you do not understand, ask your pool chemical supplier for help.
  • Keep all chemicals out of the reach of children and pets.
  • Containers should always be kept closed when not in use.
  • Use separate, clean metal or plastic measuring cups for each chemical to transfer or measure chemicals. (Scoops should not be made of wood.)
  • Wear appropriate protective equipment and clothing including gloves and footwear.
  • Protect chemicals from moisture and water – such as water, coffee, pop! Even putting the wet scoop back into the pail may cause a reaction.
  • Always add the chemical to the pool water – never the other way around (never add water to the chemical) unless instructed to do so on the container label.
  • Wash your hands thoroughly after handling any chemicals.

DO NOT


  • Do not use contents of unlabeled containers
  • Do not mix different chemicals together.
  • Do not put spilled chemicals back into their containers.
  • Avoid touching the undiluted chemicals with your hands.
  • Do not smoke when handling chemicals.
  • Do not expose to heat or flame.
  • If a fire breaks out, do not use a "dry chemical" fire extinguisher. Only use large amounts of water. If you cannot extinguish the flame immediately, leave the area and call the fire department.

Tips for safe storage of pool chemicals


  • Store in a cool, dry place away from sunlight.
  • Keep out of reach of children and pets.
  • Store chemicals in the original containers.
  • Be sure your storage area is well ventilated.
  • Never store oxidizers and acid near each other. Oxidizers release chlorine gas if they come in contact with acids.
  • Do not store liquids above powders or solids. Do not stack containers.
  • Do not store materials or chemicals above your head.
  • Do not store pool chemicals near gasoline, fertilizers, herbicides, grease, paints, tile cleaners, turpentine, or flammable materials. This tip is especially important when pool chemicals are stored in sheds or small storage rooms.
  • Do not reuse containers. Wash out the container when empty and then dispose of it.

Cleaning up small spills
Before cleaning up a small spill:


  • Make sure that the material is dry and has not mixed with other chemicals.
  • Do not clean if the chemicals has mixed with other materials (such as grass, paper, etc) or if the material is reacting (hissing, bubbling, smoking, gassing, burning) or the containers are bulging.
  • If there is any sign that a chemical reaction is happening, evacuate the area immediately and contact your local fire department for help.

DO


  • Wear protective gloves, boots and aprons made of butyl rubber or neoprene (or other material specified in the MSDS).
  • Wear safety glasses or goggles - goggles offer better protection against liquid splashes and airborne dust than glasses.
  • Ventilate the area if indoors.
  • Carefully place the spilled material in a clean, dry plastic bag or container. Place this filled plastic bag inside another bag when finished.
  • Keep an eye on the material once it has been picked up. A reaction may be delayed.
  • Dispose of the material according to manufacturer instructions and according to local regulations.

DO NOT


  • Do not place spilled material back in the original container.
  • Do not generate dust when cleaning up a powder or solid. The dust may react with the moisture on your skin and cause injury.
  • If using a container to hold the spill, do not seal.



 
Pool Chemical Explosion

the explosive incompatibility of two seemingly very similar pool chemical products -- Calcium Hypochlorite or Ca(OCl)2 and Trichlor or Trichloro-s-triazinetrione -- can be explosive.

Both products are sold as a form of "pool chlorine," consumers most likely would not expect them to be incompatible with each other and might even consider them to be the same pool chemical product.

The video above demonstrates the incompatible, explosive nature of a dry mixture of these two forms of "pool chlorine" after a small amount of water was added. The first explosion occurred within less that one minute of the water being added.

Consumers need to be aware that these seemingly similar pool chemical products are explosively incompatible. Pool chemicals should never be mixed with any other pool chemical, pool product or any product or substance of any type and should always be added directly to the pool water without any intermediate steps, such as mixing or predissolving in water.

If Trichlor must be used, the slow dissolving Trichlor tablets placed inside floaters is the recommended approach. If a chemical feeder or floater is used, only one type of pool chemical product should ever be put into that feeder or floater. If for some reason more than one type of chemical is needed, the use of separate, distinct feeders or floaters for each chemical is recommended.
Finally, protective goggles, gloves and clothing should be worn when handling pool chemicals.