Image: Video grab of a remotely operated robotic arm applying chemical dispersants
BP via Reuters
An underwater robot releases chemical dispersants at the BP leak on July 10.
updated 8/1/2010 2:47:17 PM ET 2010-08-01T18:47:17

Responding to a congressional report critical of BP's use of chemical dispersants on the Gulf spill, the Environmental Protection Agency said Sunday that while it didn't agree with every waiver given to BP it believes that dispersants are appropriate and cited a sharp drop in BP's use.

"While EPA may not have concurred with every individual waiver granted by the federal on-scene coordinator, the agency believes dispersant use has been an essential tool in mitigating this spill's impact, preventing millions of gallons of oil from doing even more damage to sensitive marshes, wetlands and beaches and the economy of the Gulf coast," the agency said in a statement.

It added that BP also slashed its use of dispersants by 72 percent through mid-July, when engineers placed a cap on the leaking well.

The Coast Guard routinely approved BP requests to use thousands of gallons of chemicals per day to break up the oil, despite a federal directive to use the dispersant rarely, congressional investigators said Saturday.

Rep. Edward Markey, D-Mass., released a letter that said instead of complying with the EPA restriction, "BP often carpet bombed the ocean with these chemicals and the Coast Guard allowed them to do it."

Before leaving on a boat tour of recovery efforts Sunday off Venice, La., BP chief operating officer Doug Suttles said the company had operated under a protocol agreed on by the Coast Guard and the federal government.

"Furthermore," spokesman Daren Beaudo said earlier, "we've complied with EPA requests regarding dispersants, which are an EPA-approved and recognized tool in fighting oil spills."

The EPA and the Coast Guard ordered BP on May 24, more than a month after the spill began, to cut the use of chemical dispersants by 75 percent.

The Coast Guard approved 74 waivers over a 48-day period after the Environmental Protection Agency order, according to documents reviewed by the investigators. Only in a few cases did the government scale back BP's request.

A spokesman for the Coast Guard did not return calls seeking comment.

Long-term impacts unknown
The chemical dispersant was effective at breaking up the oil into small droplets to be consumed more easily by bacteria, but the long-term effects to aquatic life are unknown. That environmental uncertainty has led to several spats between BP and the government over the use of dispersants on the surface and deep underwater when oil was spewing out of the well.

BP's apparently generous use of dispersants helps explain why so little oil has been spotted on the surface recently, said Larry McKinney, executive director of the Harte Research Institute for Gulf of Mexico Studies at Texas A&M University-Corpus Christi.

Whether the benefits of dispersants outweigh the possible risks is a "debatable point," he said. They've protected the Gulf Coast's fragile wetlands from heavier bands of oil but are capable of killing shrimp and crab eggs and larvae.

"That's a debate with no right answer," he said.

State waters closed by the spill have slowly reopened to fishing, most recently in Florida, where regulators on Saturday reopened a 23-mile stretch of Escambia County shoreline to harvest saltwater fish. The area was closed June 14 and remains closed to the shrimp and crab harvesting pending additional testing. Oysters, clams and mussels were never included in the closure.

In Alabama, the Department of Public Health lifted all swimming advisories for the Gulf of Mexico.

Companies working to choke off the oil for good are engaged in a billion-dollar blame game. But the workers for BP, Halliburton and Transocean say the companies' adversarial relationship before Congress isn't a distraction at the site of the April 20 rig explosion, where Transocean equipment rented by BP is drilling relief wells that Halliburton will pump cement through to choke the oil well permanently.

"Simply, we are all too professional to allow disagreements between BP and any other organization to affect our behaviors," Ryan Urik, a BP well safety adviser working on the Development Driller II, which is drilling a backup relief well, said in an e-mail last week.

The roles of the three companies in the kill efforts are much the same as they were on the Deepwater Horizon, the exploratory rig that blew up, killing 11 workers. The Justice Department has opened civil and criminal investigations, hundreds of lawsuits have been filed, and congressional investigators are probing the blast and its aftermath.

BP is trying to move forward from the disaster, which sent anywhere from 94 million to 184 million gallons of oil spewing into the Gulf, announcing once the cap was finally in place that its vilified chief executive, Tony Hayward, would be leaving in October.

Story: Despite directive, BP used oil dispersant often, panel finds

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Video: Concern over oil-dispersants used in Gulf

  1. Closed captioning of: Concern over oil-dispersants used in Gulf

    >> of disburse ants used to break up the oil in the gulf of mexico . michelle franzen is live for us in venice, louisiana with the details. a good sunday morning to you. what are the investigators saying about the disbursents.

    >> the investigation is under way, looking at documentation way back from june. you might remember the epa handed out a directive saying that the disburse ants, the chemicals used on the surface of the water and below to break up the oil should only be used in air a currencies. there is criticism this morning and over the weekend from the representative who sent a letter to the commander criticizing the coast guard for what he calls rubber stamping bp's use on the surface and "the washington post " certainly defends the commander's use of that saying and even the epa said following the directive, the peak use dropped by more than 70%.

    >> okay. how about the busted well in the attempts to seal that up? when is that supposed to happen?

    >> today they are working on removing sediment from the relief well caused by tropical storm bonnie . that should last either into tonight or tomorrow. then they get started on the static kill that is the first part of what could be the permanent solution. they will be pumping cement and mud back down to the temporary cap. if all goes well with that, they will start on a same procedure with the bottom kill that relief well and that could permanently plug the leak sometime in mid-august to late august.

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