The Legacy of the Bhopal Gas Tragedy
As we wrapped up the Toxic Release Inventory (Form R) reporting for the year, curiosity got me as to how this program came about. So, I decided to refresh my memory and dive back into my college years during which I studied Environmental Management at Indiana University.
The Environmental Protection Agency (EPA) has a great website filled with amazing resources and content. However, in looking for detailed information on the history of a specific regulation, they tend to provide only a summary -- presumably to allow space for more current resources.
This is the EPA version of how TRI came to be:
On December 2, 1984, a cloud of extremely toxic methyl isocyanate gas escaped from a Union Carbide Chemical plant in Bhopal, India. Thousands of people died that night in what is widely considered to be the worst industrial disaster in history. Thousands more died later as a result of their exposure, and survivors continue to suffer from permanent disabilities.
The incident raised public concern about toxic chemical storage, releases, and emergency response. It led to the passage of the Emergency Planning and Community Right-to-Know Act (EPCRA) under the 1986 Superfund Amendments and Reauthorization Act. Section 313 of EPCRA established the Toxics Release Inventory.
Boom! There you have it…explained, right? Yeah, not so much.
Here’s the more detailed -- but not too wordy -- version of what happened… But, before I get into the aftermath of this catastrophic event, let’s discuss what led to it.
When the facility was built in Bhopal (in the 1970s), the site was zoned for light industrial and commercial use, not for the hazardous industry, as the plant was approved only for the formulation of pesticides. MIC was only to be imported in small quantities. However, pressure from competitors in the chemical industry led to the manufacture of raw materials and intermediate products for the formulation of the final product. This was inherently a more hazardous process.
By the early 1980s, the plant had significantly reduced production due to a decrease in demand for pesticides. Local managers of the UCIL plant were instructed to close the plant in preparation for sale in the summer of 1984. When no buyer was found, UCIL made plans to dismantle key production units. All the while, “the facility continued to operate with safety equipment and procedures far below the standards found in its sister plant in Institute, West Virginia.” It seems the local government was aware of the safety issues but hesitant to place burdens on the struggling industry at risk of losing the economic gains afforded by such a large employer
“The vent-gas scrubber, a safety device designed to neutralize toxic discharge from the MIC system, had been turned off three weeks prior. Apparently, a faulty valve had allowed one ton of water for cleaning internal pipes to mix with forty tons of MIC. A 30-ton refrigeration unit that normally served as a safety component to cool the MIC storage tank had been drained of its coolant for use in another part of the plant. Pressure and heat from the vigorous exothermic reaction in the tank continued to build. The gas flare safety system was out of action and had been for three months.”
On Sunday, December 2, the 100 workers on the late shift at the Union Carbide India Limited (UCIL) facility in Bhopal, India were in the process of making the pesticide Sevin. This involved mixing carbon tetrachloride, methyl isocyanate (MIC), and alpha-naphthol.
While most of the one million residents of Bhopal slept, at 11:00 p.m. a plant operator noticed a small leak of MIC gas and increasing pressure inside a storage tank.
Around 1:00 a.m. on December 3, 1984, more than 40 tons of methyl isocyanate gas leaked from the pesticide plant. Within hours, an estimated 3,800 people perished, and the final death toll is estimated to be between 15,000 and 20,000 which includes premature deaths reported during the two decades following the disaster.
In a settlement mediated by the Indian Supreme Court, Union Carbide Corporation accepted moral responsibility and agreed to pay $470 million to the Indian government to be distributed to claimants as a full and final settlement. By the end of October 2014, according to the Bhopal Gas Tragedy Relief and Rehabilitation Department, compensation (~$486,101,760) had been awarded to 574,366 people (dependents of the deceased, seriously injured, permanently disabled, cancer and kidney patients, and temporally disabled people). This averages out to approximately $846.33 per person.
This disaster cast a spotlight on the urgent need for enforceable international standards for environmental safety, preventative strategies to avoid similar accidents, and help ensure industrial disaster preparedness.
Enter the Emergency Planning and Community Right to Know Act (EPCRA) and Toxic Release Inventory (TRI).
TRI tracks the management of certain toxic chemicals that may pose a threat to human health and the environment. U.S. facilities in different industry sectors must report annually how much of each chemical is released to the environment and/or managed through recycling, energy recovery, and treatment. (A "release" of a chemical means that it is emitted to the air or water, or placed in some type of land disposal.)
https://www.britannica.com/event/Bhopal-disaster
https://www.epa.gov/toxics-release-inventory-tri-program/what-toxics-release-inventory
https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-4-6
https://www.history.com/this-day-in-history/explosion-kills-2000-at-pesticide-plant
