Liquid Nitrogen Leak Prompts Building Evacuation
4045 Mason Rd NE
Published · Updated
Watch Live Videos
Download CitizenSummary
- Firefighters responded to a liquid nitrogen leak from a 203-liter tank at a Seattle location, ensuring the building was evacuated and activating the fire alarm to facilitate the process.
Timeline
Seattle Fire says it is now safe to return to the building, and all units are returning to service.
Hazmat crews mitigated the hazard and monitored the air inside the building, according to Seattle Fire.
Firefighters located a leaking cylinder inside a building in the 4000 block of Mason Road NE and moved it to an exterior balcony, Seattle Fire said. Hazmat crews prepared to enter.
The building has been evacuated as a precaution, officials say.
The cylinder is on a balcony, outside.
Firefighters are investigating a valve issue as a potential source of the leak.
Firefighters report ice accumulation on the cylinder, indicating a cryogenic hazard.
The fire alarm has been activated to prompt evacuations.
Firefighters are inside the building to ensure it is evacuated.
Firefighters have been informed of an active leak in a 203-liter tank of liquid nitrogen.
Firefighters have received a report of a liquid nitrogen spill. The amount is unknown.
A 911 caller has reported an unconfirmed incident at 4045 Mason Rd NE.
Seattle Fire says it is now safe to return to the building, and all units are returning to service.
Hazmat crews mitigated the hazard and monitored the air inside the building, according to Seattle Fire.
Firefighters located a leaking cylinder inside a building in the 4000 block of Mason Road NE and moved it to an exterior balcony, Seattle Fire said. Hazmat crews prepared to enter.
The building has been evacuated as a precaution, officials say.
The cylinder is on a balcony, outside.
Firefighters are investigating a valve issue as a potential source of the leak.
Firefighters report ice accumulation on the cylinder, indicating a cryogenic hazard.
The fire alarm has been activated to prompt evacuations.
Firefighters are inside the building to ensure it is evacuated.
Firefighters have been informed of an active leak in a 203-liter tank of liquid nitrogen.
Firefighters have received a report of a liquid nitrogen spill. The amount is unknown.
A 911 caller has reported an unconfirmed incident at 4045 Mason Rd NE.
Seattle Fire says it is now safe to return to the building, and all units are returning to service.
Hazmat crews mitigated the hazard and monitored the air inside the building, according to Seattle Fire.
Firefighters located a leaking cylinder inside a building in the 4000 block of Mason Road NE and moved it to an exterior balcony, Seattle Fire said. Hazmat crews prepared to enter.
The building has been evacuated as a precaution, officials say.
The cylinder is on a balcony, outside.
Firefighters are investigating a valve issue as a potential source of the leak.
Firefighters report ice accumulation on the cylinder, indicating a cryogenic hazard.
The fire alarm has been activated to prompt evacuations.
Firefighters are inside the building to ensure it is evacuated.
Firefighters have been informed of an active leak in a 203-liter tank of liquid nitrogen.
Firefighters have received a report of a liquid nitrogen spill. The amount is unknown.
A 911 caller has reported an unconfirmed incident at 4045 Mason Rd NE.
Seattle Fire says it is now safe to return to the building, and all units are returning to service.
Hazmat crews mitigated the hazard and monitored the air inside the building, according to Seattle Fire.
Firefighters located a leaking cylinder inside a building in the 4000 block of Mason Road NE and moved it to an exterior balcony, Seattle Fire said. Hazmat crews prepared to enter.
The building has been evacuated as a precaution, officials say.
The cylinder is on a balcony, outside.
Firefighters are investigating a valve issue as a potential source of the leak.
Firefighters report ice accumulation on the cylinder, indicating a cryogenic hazard.
The fire alarm has been activated to prompt evacuations.
Firefighters are inside the building to ensure it is evacuated.
Firefighters have been informed of an active leak in a 203-liter tank of liquid nitrogen.
Firefighters have received a report of a liquid nitrogen spill. The amount is unknown.
A 911 caller has reported an unconfirmed incident at 4045 Mason Rd NE.
Seattle Fire says it is now safe to return to the building, and all units are returning to service.
Hazmat crews mitigated the hazard and monitored the air inside the building, according to Seattle Fire.
Firefighters located a leaking cylinder inside a building in the 4000 block of Mason Road NE and moved it to an exterior balcony, Seattle Fire said. Hazmat crews prepared to enter.
The building has been evacuated as a precaution, officials say.
The cylinder is on a balcony, outside.
Firefighters are investigating a valve issue as a potential source of the leak.
Firefighters report ice accumulation on the cylinder, indicating a cryogenic hazard.
The fire alarm has been activated to prompt evacuations.
Firefighters are inside the building to ensure it is evacuated.
Firefighters have been informed of an active leak in a 203-liter tank of liquid nitrogen.
Firefighters have received a report of a liquid nitrogen spill. The amount is unknown.
A 911 caller has reported an unconfirmed incident at 4045 Mason Rd NE.
Stay up-to-date
Download CitizenComments6
last night someone left a valve on, now we’re spilling liquid nitrogen!
Asphyxiation from oxygen displacement in liquid nitrogen is a very real risk and should be of great concern. Liquid nitrogen expands nearly 700 times into a gas as it warms. Because nitrogen gas is colorless and odorless, victims cannot sense the lack of oxygen and can pass out or die within seconds.
Rip
Well then…
last night someone left a valve on, now we’re spilling liquid nitrogen!
Asphyxiation from oxygen displacement in liquid nitrogen is a very real risk and should be of great concern. Liquid nitrogen expands nearly 700 times into a gas as it warms. Because nitrogen gas is colorless and odorless, victims cannot sense the lack of oxygen and can pass out or die within seconds.
Rip
Well then…
last night someone left a valve on, now we’re spilling liquid nitrogen!
Asphyxiation from oxygen displacement in liquid nitrogen is a very real risk and should be of great concern. Liquid nitrogen expands nearly 700 times into a gas as it warms. Because nitrogen gas is colorless and odorless, victims cannot sense the lack of oxygen and can pass out or die within seconds.
Rip
Well then…
last night someone left a valve on, now we’re spilling liquid nitrogen!
Asphyxiation from oxygen displacement in liquid nitrogen is a very real risk and should be of great concern. Liquid nitrogen expands nearly 700 times into a gas as it warms. Because nitrogen gas is colorless and odorless, victims cannot sense the lack of oxygen and can pass out or die within seconds.
Rip
Well then…
Stay informed on local incidents
Download Citizen


last night someone left a valve on, now we’re spilling liquid nitrogen!
Asphyxiation from oxygen displacement in liquid nitrogen is a very real risk and should be of great concern. Liquid nitrogen expands nearly 700 times into a gas as it warms. Because nitrogen gas is colorless and odorless, victims cannot sense the lack of oxygen and can pass out or die within seconds.
Rip
Well then…