Tar Sands Crude Pipeline Ruptures, Dumps 84,000 Gallons on Mayflower, Arkansas

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By Glynn Wilson

Forty-five minutes. That’s how much time it took a ruptured pipeline in Mayflower, Arkansas, on Friday to dump at least 84,000 gallons of tar sands crude into a residential neighborhood and force the evacuation of 22 homes.

The evacuations weren’t just because the oil is messy or inconvenient. Highly toxic and carcinogenic solvents like benzene are used to dilute tar sands crude to make it pumpable. During a spill, those toxics evaporate into the air.

Just over two weeks. That’s how much time people have left to tell President Obama he should reject the Keystone XL tar sands pipeline, according to the Sierra Club.

“We’ll be living with the consequences of his decision for a lot longer,” Sierra Club Executive Director Michael Brune said in a statement issued in the wake of the Mayflower Spill.

“The climate pollution that mining the tar sands would create is reason enough not to approve Keystone,” he said. “But last weekend’s disaster in Arkansas is a glaring reminder of the other reason: Tar sands crude is much riskier to transport than conventional oil.”

The ExxonMobile Pegasus pipeline that leaked in Mayflower has only about one-tenth of the carrying capacity that the Keystone XL would.

“We don’t know yet whether it contaminated nearby Lake Conway, an important source of drinking water, but the same pipeline crosses 13 miles of the Lake Maumelle watershed,” Brune said. “If the spill had happened there, it would have contaminated the water supply for most of central Arkansas.”

That the spill didn’t happen in an even worse location is not much consolation to the residents of Mayflower who don’t know when, or even if, they will be able to return to their homes. Many of them had no idea there was an oil pipeline in their neighborhood, much less that it was carrying tar sands crude.

“This was a tough way to find out,” Brune said. When it comes to tar sands pipelines, he said, “what we don’t know will hurt us.”

Here’s what every American should know about tar sands pipelines.

1. Tar sands crude oil is much harder to clean up than conventional oil. That’s because the bitumen that remains after benzene and other solvents evaporate is thick and heavy — it sinks in water. Remember the Enbridge spill on the Kalamazoo River nearly three years ago? Despite a nearly $1 billion cleanup effort, 38 miles of the river
remain contaminated.

2. Tar sands crude is much more likely to spill than conventional crude oil. TransCanada’s first Keystone pipeline leaked 12 times in its first 12 months. Because tar sands must be pumped at higher pressures and temperatures than conventional oil, it corrodes pipes faster.

3. Tars sands pipeline leaks are difficult to detect. It was 17 hours before the Enbridge pipeline that spilled on the Kalamazoo was finally shut off. We can be thankful that the spill in Mayflower was noticed in less than an hour, but that’s only because a neighbor spotted it.

Then again, it’s hard to miss a river of oil flowing down your street.

4. Current pipeline regulations and spill-response methods are completely inadequate for the higher risks posed by tar sands. That’s another reason to reject Keystone XL, but it’s also a problem for existing older pipelines, like the one that spilled in Arkansas, that have started carrying tar sands during the past decade. The Sierra Club is part of a broad coalition of landowners, former and current government officials, environmental organizations, renewable energy promoters and sportsmen’s groups that has petitioned the EPA and the Department of Transportation’s Pipeline and Hazardous Materials
Safety Administration to develop stronger safety standards for tar sands pipelines and, in the meantime, put a moratorium on pumping tar sands crude.

Tragic as the disaster in Arkansas is, it could have been much worse.

“If the Keystone XL is built, it’s a certainty that someday, somewhere, even more devastating spills will happen,” Brune said. “It’s only a matter of time.”

The public should also know that ExxonMobile may try to exploit a strange legal exemption to avoid paying for the damage and cleaning up the spill, in spite of the company’s public statements claiming they “take full responsibility.”

Corporate legal experts are floating the trial balloon that technicality speaking, what spilled in Mayflower “is not oil” under the law. The company claims what was being transported from Canada was “diluted bitumen” — the heavy crude that’s overrun Mayflower, Arkansas — which is not classified as ‘oil’.

That very distinction exempts Exxon from contributing to the government’s oil spillage cleanup fund, according to numerous mainstream media reports out of Arkansas.

ExxonMobil says it was transporting “low-quality Wabasca Heavy crude” from Canada’s Alberta region, which contains large quantities of bitumen – a “thick, sticky, black semi-solid form of petroleum which is transported in a diluted form (dilbit) as it makes its way from Canada to US refineries,” according to Oil Change International.

Companies that transport oil are required to pay $.08 per barrel into the Oil Spill Liability Trust Fund, which is used by the federal government to respond to oil spills. Apparently Exxon is exempt from paying into the fund for its Pegasus pipeline since it carries “tar sands oil,” not “conventional oil.”

Brune is urging the public to tell President Obama where they stand, and ask their friends to do the same.

“There’s no excuse in the world for pursuing extreme oil like tar sands when we could be investing in clean energy instead,” he said.

The public can take action here.

© 2013, Glynn Wilson. All rights reserved.

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