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In their recommendations released in January, the agency suggested that the federal government require railways transporting flammable liquids in DOT 111 class cars to improve their cars to meet new, stricter safety standards introduced in 2011.
the regulator and industry," the TSB wrote.
The Gazette reporter Sue Montgomery gives a look ahead Monday in Lac M Quebec, as The Transportation Safety Board is expected to release its final report on the Lac M train derailment on Tuesday, August 19, 2014, a year after a train derailment and explosion killed 47 in the small town. ET by clicking here or tapping on the link under Related Stories.
Almost all of the cars involved Converse All Star Chuck Taylor Shoes in the crash were breached and released oil.
During the year long effort in Lac Mgantic, the TSB assigned to the file roughly 50 investigators and experts in dangerous goods, engineering, human error, railway transport and mechanics.
The TSB recommended in January that Transport Canada require railways to do regular risk assessments and adopt stricter safety measures, including speed reductions and more regular inspections, for all dangerous cargo routes.
The agency's investigators arrived in Lac Mgantic hours after a train with 72 tanker cars hauling crude oil derailed and exploded at the centre of town early in the morning of July 6.
After the 150 firefighters working on the scene brought the oil fire under control which took about four days search and rescue teams, TSB investigators and provincial police began looking through the wreckage for bodies and evidence that could helpdetermine the cause of the accident.
Investigators focused on several factors they believed may have influenced or caused the accident: the railway cars and infrastructure, the oil, and possible human error.
The oil's flashpoint the temperature at which vapours would ignite was closer to gasoline, the TSB said.
Mgantic, after the derailment. The oil contained in these cars, which were not damaged in the accident, provided a more accurate sample than oil that had been heated by the fire, the TSB said.
Those standards require thicker shells and improved fittings on the cars. None of the Lac Mgantic cars were equipped with these features.
During the investigation, TSB employees interviewed witnesses and railway employees, inspected the train's black boxes and analyzed oil from the Lac Mgantic rail cars and from wells in North Dakota, where the oil originated.
Several firefighters on the scene of the accident last year observed that the oil burning in Lac Mgantic seemed unusually flammable. Crude oil is not typically easy to ignite, and some guessed that the train had been carrying natural gas or another more reactive substance.
Investigators also tested the crude oil the 72 tankers carried.
Four of the cars also suffered thermal tears shell failures caused by extreme pressure inside the tanks that built up as the fire heated and vaporized the oil.
In a set of recommendations released in January, the TSB wrote that "for about 20 years" the agency had warned that the DOT 111 class cars are likely to release their contents in a crash.
gantic derailment report Aug
The oil had been labelled as a packing group III substance the least volatile classification for flammable liquids, which are categorized under Canada's Transportation of Dangerous Goods regulations. But TSB analysis found that its properties would place it in the more volatile packing group II.
"In previous investigations, the TSB identified the risks posed by the release of product from Class 111 tank cars, and the vulnerability of these cars to release product due to accident damage. The weaknesses of Class 111 tank cars have been acknowledged by White Converse Shoes Womens Sale
TSB analysis confirmed that the oil was more volatile than the train's shipping manifest suggested.
They examined kilometres of track, took samples of the tank cars to determine their composition and made 3D laser scans of all 72 cars to figure out exactly how they failed.
Transportation Safety Board investigators also said that they were surprised by how readily the oil had ignited.
class tanker cars loaded with oil. counterpart, the National Transportation Safety Board, have both noted in dozens of accident reports that the cars are prone to failure in accidents.
Investigators sampled oil from nine of the train's cars, which did not explode and were moved to Nantes, uphill from Lac Converse All Star Shoes Green
The agency also recommended that railways be required to write emergency response assistance plans for all trains carrying large amounts of oil, which was not a requirement in July 2013.
Two of these cars tore within the first 20 minutes of the fire, TSB investigators found. With flammable material, this type of tank failure can be catastrophic and cause "large fire balls," the agency explained in a lab report released in March.
The TSB's report is also expected to address human factors and infrastructure problems that might have led to the accident.
The train consisted of five locomotives pulling 74 cars, including 72 unpressurized DOT 111 Converse Dark Pink
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