Tag Archives: Vinyl Chloride

The burnin’ ring of fire

The Norfolk Southern train derailment and fire in East Palestine, OH, has spread into the political dumpster. By not appearing near the crash site promptly, both Biden and Buttigieg are feeling the heat of the GOP panic machine. The single plank on the GOP platform is to knock down Democrats at every opportunity. While the news organs of the GOP are busy trying to blame the Biden administration for the accident, fire and contamination, citizens are expressing dismay over not knowing what to do going forward. They aren’t receiving much advice or direction from EPA about how much they should be worried about contamination and exposure to the released chemicals. In fact, on the ground it has been hard to see the hand of government anywhere. Their frustration is normal and understandable. I would be frustrated too.

Let’s step back a minute and examine the situation from 50,000 ft. The last thing we want in government is for a proper response to an emergency of this scale to require the president to personally lead the emergency response. The same is true for the Secretary of Transportation. Good leaders delegate responsibility to specialists for situations like this. Good leaders are watchful but stay out of the way of the experts. Good leaders make sure that the people on the ground have the resources they need to do their jobs. Ok, Biden didn’t respond publicly to the situation early enough, but that is not to say that things weren’t happening. But, he has 330,000,000 American back-seat drivers to make happy. That’s his job.

Let’s remind ourselves that Biden and NATO are also busy trying to prevent the start of WWIII.

As with an emergency of any scale, it takes responders some time to understand the situation and then to bring resources to bear. In the mean time, the NTSB was promptly dispatched and has already published preliminary report RRD23MR005 on the event. It is very interesting to see that many of the safety systems worked. The overheated wheel was detected and an emergency braking procedure was put into action just before the derailment occurred.

Ok, Biden and Buttigieg could have been quicker to publicly extend sympathy and the promise of relief. Complaining about this is like accusing grandma of not giving you a kiss while she was trying to put out a fire in the kitchen. But contrast this PR error of omission with the antics of #45 in Puerto Rico after the recent hurricane. Remember how he tossed rolls of paper towels as mock support during an interview down there? MAGA people have no leg to stand on with presidential expressions of sympathy.

From Wikipedia, https://en.wikipedia.org/wiki/Dose%E2%80%93response_relationship

As far as what kind of toxic threat there is to humans and what potential environmental insult there will be, the situation has not fully played out yet. This will need to be studied for years. There is acute toxicity and there is chronic toxicity. With most chemicals there will be a clear dose-response relationship with chemical dosing if you choose the right experiment to do. However, that relationship can become quite uncertain with low dosing. The health effects of exposures from the East Palestine derailment cannot be measured with high precision over the long haul. Genuine toxic effects are over-printed on a background of natural disease. Diseased tissues do not have little signs that say “I was caused by vinyl chloride dosing”. Histology can characterize cell types and correlate them with known chemical insult, but only a jury can say if any particular conclusion will hold up in court. With toxicity effects, certainty is not always what you get.

Paracelsus said in 1538 that “All things are poison, and nothing is without poison; the dosage alone makes it so a thing is not a poison“. That observation is still true today.

Hazardous Metaphor On Fire in Ohio

When I think “train wreck” I usually think of #45’s presidency. But here I refer to the actual Feb 3, 2023, Norfolk Southern train wreck in East Palestine, OH. A very long train carrying, among other things, tankers of hazardous chemicals had a derailment and fire near the small town of East Palestine, OH, along the southwest Pennsylvania border. It was a true calamity releasing hazardous chemicals, some of which caught fire and burned for days. It isn’t clear as yet as to what burned and what didn’t. The extent of pollution will eventually be released by authorities and monitored for years to come.

Early reports have claimed that the accident started with an overheated wheel bearing. It would be interesting learn how this could lead to a derailment. The root cause analysis will be interesting.

According to Wikipedia

NTSB chair Jennifer Homendy explained that the train in this accident would not have been required to utilize the ECP braking system even if the FAST Act was not repealed, because the term high-hazard flammable train means a single train transporting 20 or more tank cars loaded with a Class 3 flammable liquid. As it had only three such placarded train cars, the derailed train did not meet the qualifications of a “high-hazard flammable” train.

ECP stands for Electronically Controlled Pneumatic brakes. The Wikipedia page describes the pathetic political kerfuffle over these brakes and how certain groups fought the requirements for them.

Photo from Wikipedia, https://en.wikipedia.org/wiki/2023_Ohio_train_derailment

The Washington Post released a piece, dated Feb 18, 2023, about it showing some interesting pictures. One aerial shot captures the wreckage along with what the cars were carrying. A security camera caught the train moving along with a large fire blazing under one car minutes before entering town. The video has since been removed.

The burning vinyl chloride (and … ?) produced a toxic plume that by some accounts was also corrosive. I assume this to be due to the burning of an organic chloride releasing hydrochloric acid vapors. According to Wikipedia, of the 150 cars in the train some 38 train cars were derailed.

Substances in cars that were derailed according to the Washington Post-

  • Vinyl chloride
  • Polyethylene
  • Dipropylene and propylene alcohol
  • Semolina (a wheat flour)
  • Polyvinyl chloride (PVC)
  • Ethylhexyl acrylate
  • Petroleum lubricating oil
  • Diethylene glycol
  • Isobutylene
  • Butyl acrylate
  • Benzene

Much was made in the news about burning vinyl chloride and noxious fumes, but I haven’t heard an accounting of what actually burned. Any release of acrylate monomers is especially unfortunate since as a group, they can be nasty lachrymators. This will take years to get through the courts.