Santa Barbara County firefighters issued a HazMat response on Sunday after a liquid nitrogen tanker truck was reported leaking west of Lompoc. The incident prompted road closures and area isolation as firefighters worked to contain the leak and plan for transferring the product to another tanker.
Multiple agencies responded to the scene, including Santa Barbara County Fire Department, Lompoc Fire Department, Vandenberg Fire Department, and the California Highway Patrol.
Liquid Nitrogen Tanker-Truck w/Leaking Valve: West Central Ave at N. Artesia Ave, west of Lompoc.
Liquid nitrogen tanker truck with a leaky valve. Approx. 7,800 lbs of product on board. The area remains isolated.Liquid nitrogen is an inert, non-flammable gas that rapidly… pic.twitter.com/kMnVhVNIfn
— Scott Safechuck (@SBCFireInfo) January 12, 2026
Santa Barbara County Fire Department’s HazMat 31 unit worked to isolate the leaking valve and stabilize the tanker. Firefighters isolated the leak by approximately 8:37 p.m. Sunday.
Officials said operations will continue Monday morning, when crews plan to pump the liquid nitrogen into another tanker for transport.
Liquid Nitrogen Tanker-Truck w/Leaking Valve Update: The leak isolated by firefighters at 8:37 pm. Operations will continue tomorrow morning to have the product pumped to another tanker for transport. (SBC Fire). pic.twitter.com/DhZheVbkEz
— Scott Safechuck (@SBCFireInfo) January 12, 2026
California Highway Patrol closed the intersection while emergency operations were underway. No injuries or damage were reported.
Liquid nitrogen is non-flammable and considered an inert gas, but it can still pose serious risks. When released, it can displace oxygen in the air, potentially leading to breathing difficulties or asphyxiation in confined or nearby areas. Because liquid nitrogen is stored at extremely cold temperatures, direct exposure can cause severe frostbite, with the highest risk in the immediate area around the leaking valve.
Previous HazMat Responses in Santa Barbara County
The incident follows a few recent hazardous materials responses across Santa Barbara County.
In December 2025, firefighters responded to a chemical spill inside a garage on the 1500 block of East Valley Road in Montecito involving approximately one gallon of concentrated muriatic acid, commonly used to clean concrete.
Firefighters from Montecito Fire and Santa Barbara City Fire isolated the spill and closed access to the area. HazMat crews neutralized the substance, and a private company handled cleanup. No injuries were reported.
In another incident in November 2025, Santa Barbara County Fire Department’s Hazardous Materials team responded to a suspicious package in the 500 block of Plaza Drive in Santa Maria, securing the item and taking appropriate safety precautions.
Tests later confirmed the package did not contain hazardous materials, and no injuries were reported.
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Avoided the issues described here: “Terminator 2: Judgment Day (T2)”…
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This is where the truck ended up (Note: @ where the silver Toyota is… I backed it up to show the tire tracks of the “shortcut”?);
https://www.google.com/maps/@34.6615368,-120.5228333,3a,75y,305.64h,101.66t/data=!3m7!1e1!3m5!1sZ8MFmyunlWkYWhHDjWivAA!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D-11.661656118123844%26panoid%3DZ8MFmyunlWkYWhHDjWivAA%26yaw%3D305.64315215216465!7i16384!8i8192?entry=ttu&g_ep=EgoyMDI2MDEwNy4wIKXMDSoKLDEwMDc5MjA3M0gBUAM%3D
I imagine that the culvert at the point was even deeper as there’s been some rain… (since that Sep. 2025 is so last year)
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I am curious why all of our news services (Indepenedent, NewsHawk or EdHat) report the incident as only a HazMat response regarding a Liquid Nitrogen leak.
The photos attached clearly show the Liquid Nitrogen Tanker trailer turned over and disabled.
There would not have been a response needed if the vehicle had been operated in a manor that it wasn’t disabled.
Is there reason that the obvious couldn’t be reported?
Was the leak of hazardous material isolated from the vehicle incident?
Is the issue of delivering hazardous material safely in our area a worthy discussion?
JOE – not sure what you’re upset about but yes, the transportation of hazardous materials is a very worthy discussion. It’s one of the main reasons we’re all so opposed to oil extraction and transportation.
I was driving by shortly after this happened and it was amazing how much the surrounding air reeked of liquid nitrogen! Glad everyone is safe!
Um… Nitrogen is odorless. Our atmosphere is 78% nitrogen.
This is about liquid nitrogen, not our atmosphere. ;-p
G says “Liquid nitrogen (LN2)
Characteristics
Appearance: Colorless, odorless, tasteless liquid.
Temperature: Boils at -196°C (-321°F).
Behavior: Rapidly vaporizes into nitrogen gas when exposed to warmer temperatures, creating a dense white mist.
Inert: Does not support combustion, but can still displace oxygen, posing an asphyxiation risk.
Common Uses
Cryopreservation: Storing biological samples like cells, tissues, and sperm in labs.
Medical: Cryosurgery to destroy diseased tissue (e.g., warts, tumors) and cryotherapy.
Food Industry: Flash-freezing foods, creating novelty textures (like ice cream), and food packaging.
…”
Of note BOILS @ Negative196 Celsius… but to your claim that somehow it has an Odor/can be detected by humans seems off?
When exposed to air:
“When liquid nitrogen (LN2) meets warmer air,
it rapidly boils and vaporizes into invisible nitrogen gas, which then chills the surrounding moisture in the air, creating a dramatic, visible white fog of condensed water vapor (not the nitrogen gas itself) that pours downwards. This process releases a massive volume of gas (expanding ~700 times), posing risks of asphyxiation by displacing oxygen in enclosed spaces and causing frostbite/cold burns on contact, requiring excellent ventilation and careful handling”
??? so now we’re talking about Nitrogen gas at this point because of above statement. yielidng:
“Nitrogen gas (\(N_{2}\)) is a colorless, odorless, nonflammable gas that makes up about 78% of Earth’s atmosphere, ”
I can’t bold or HIGHLIGHT -> ODORLESS ; but it showing in all my results!
…that was really hard?
So my least snarky reply would have been? What did your {reeked} smell like; pungent; acidic; fruity…?
BUT, as to my other attempt at facts noted “human”; the more I thought about it I’d exclude our canine friends from that (I didn’t anything about dogs)?
> This is about liquid nitrogen, not our atmosphere. ;-p
This is about nitrogen being odorless, dufus.