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Thursday, June 20, 2024

Is the oil spill over?


No more oil is likely to leak into the Gulf of Mexico now that efforts to plug the blown-out well are succeeding, the government’s point man on the spill declared Wednesday. A relieved President Barack Obama said the fight to stop the leak is “finally close to coming to an end.”

At the White House, National Incident Commander Adm. Thad Allen said oil company BP‘s effort to plug the leak was progressing, giving officials “high confidence” that there will soon be no more oil leaking into the environment. The upbeat assessment came as a government report released Wednesday said only about a quarter of the spilled oil remains unaccounted for, whether still in the Gulf or cleaned off of beaches or marshes. The rest has been contained, dispersed or has otherwise disappeared.

Obama’s team, however, was careful to emphasize that much work remains, from cleanup to damage assessment to help for hurting families. Obama said people’s lives “have been turned upside down” by the spill.

And White House spokesman Robert Gibbs told reporters, “There’s a lot of reasons why there’s no ‘Mission Accomplished’ banner.”

“There’s a lot of work to do,” Gibbs said. “We’re not leaving the area, and more importantly, we’re not leaving behind any commitment to clean up the damage that’s been done and repair and restore the Gulf.”

Jane Lubchenco, head of the National Oceanic and Atmospheric Administration, said the spill’s effect on wildlife will continue for “years and possibly decades to come” and that assessments of that damage would be ongoing as well.

BP PLC earlier Wednesday announced it had reached a significant milestone when mud that was forced down the well held back the flow of crude in a procedure known as a “static kill.”

Government officials defended the credibility of their report saying about 75 percent of the oil is gone. They said that description is based on direct measurements of the spill as well as estimates, and that the instruments they’ve used to capture the scope of the disaster have improved since it began April 20. They said the report was subject to peer review and involved both government and outside experts. White House energy adviser Carol Browner said the chance of any new information causing large-scale change to the conclusions is “very, very small.”

In Congress, lawmakers pressed scientists to explain what effects a chemical used to get rid of some of the oil will have on the Gulf’s ecosystem.

BP applied nearly 2 million gallons of a chemical dispersant to the oil as it spewed from the broken underwater well. The aim was to break apart the oil into tiny droplets so huge slicks wouldn’t tarnish shorelines and coat marine animals, and to make the oil degrade more rapidly.

The government report released Wednesday shows that about 10 percent of the estimated 172 million gallons of oil released into the Gulf of Mexico was dispersed by the chemicals.

Sen. Sheldon Whitehouse, D-R.I., called use of the chemicals a “grand experiment.” He said it was unclear whether it would limit damage from the spill, or cause greater harm.

Paul Anastas, the assistant administrator for the Office of Research and Development at the U.S. Environmental Protection Agency, said that while the effects of such a large quantity of dispersants are unknown, tests so far have not found dispersants near coasts or wetlands. Laboratory tests conducted by the EPA comparing the chemicals to oil alone and to mixtures of oil and dispersants also show that they are not more toxic.

“When you look at all of the tools to combat this tragedy … dispersants have shown to be one important tool in that toolbox,” Anastas told lawmakers.

Allen also said at the White House that the effectiveness of dispersants — as well as other tools such as skimmers — would be studied so that decisions could be made in the future about whether any risk is worth it.

But several independent scientists testifying before the panel Wednesday faulted the EPA testing.

“A laboratory experiment … doesn’t help us understand much of the environmental chemistry or its effects on other parts of the ecosystem,” said Ronald Kendall, director of the Institute of Environmental and Human Health at Texas Tech University.

The chemical — Corexit 9500 — was on a federal list of preapproved dispersants, but in May the EPA directed BP to use less of the toxic chemical because its long-term effects were unknown.


Associated Press writers Ben Feller and Julie Pace contributed to this report.


On the Net:

EPA Dispersant Studies:

Copyright © 2010 The Associated Press

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1 thought on “Is the oil spill over?”

  1. The National Oil and Hazardous Substances Pollution Contingency Plan, more commonly called the National Contingency Plan or NCP, is the federal government’s blueprint for responding to both oil spills and hazardous substance releases. The National Contingency Plan is the result of our country’s efforts to develop a national response capability and promote overall coordination among the hierarchy of responders and contingency plans.

    Pursuant to NCP Section 300.310, “As appropriate, actions shall be taken to recover the oil or mitigate its effects. Of the numerous chemical or physical methods that may be used, the chosen methods shall be the most consistent with protecting public health and welfare and the environment. Sinking agents shall not be used.”

    Sinking agents means those additives applied to oil discharges to sink floating pollutants below the water surface.

    The question is whether BP’s dispersants are “sinking agents” when they are applied a mile underwater at the source of the well leak.

    David Hollander, a University of South Florida oceanographer, headed a research team that discovered a six-mile (10-km) wide “oil cloud” while on a government-funded expedition aboard the Weatherbird II, a vessel operated by the university’s College of Marine Science.

    The underwater contaminants are particularly “insidious” because they are invisible, Hollander said, adding that they were suspended in what looked like normal seawater. “It may be due to the application of the dispersants that a portion of the petroleum has extracted itself away from the crude and is now incorporated into the waters with solvents and detergents,” he added. He said dispersants, a cocktail of organic solvents and detergents, had never been used at the depth of BP’s well before, and no one really knows how they interact physically and chemically under pressure with oil, water and gases.

    Hollander said the contaminants raised troubling questions about whether they would “cascade up the food web.” The threat is that they will poison plankton and fish larvae before making their way into animals higher up the food chain, Hollander said.



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