No end in sight for Gulf oil-spill problemsMay 25th, 2010 by cdunagan
As the worst ecological disaster in U.S. history unfolds in the Gulf of Mexico, emotions are boiling over along the Gulf Coast.
Sitting here in the Pacific Northwest, I am still dazed by the realization that an oil well, nearly a mile under water, has gone out of control, spewing millions of gallons of crude and creating an underwater mess bigger than what we see on the surface.
I cannot fathom that we are experiencing a disaster likely to be many times worse than Alaska’s Exxon Valdez. Until somebody figures out how to turn off the flow of oil, we can’t begin to estimate the size of this catastrophe or imagine that things will get better.
BP is hoping that a process, never used underwater, will stop the flow of oil. The technique, called a “top kill” and performed on above-ground wells in the Middle East, involves shooting heavy mud and cement into the well. The first shot could come tomorrow. Chances of success are estimated at 60-70 percent by BP, but the company’s track record for estimates has not been good so far.
Oily dead birds and other sea life, predicted weeks ago, are washing up on shore. Sensitive marsh lands, impossible to clean without destroying them, have been touched. Longtime fishermen and fishing communities are shut down.
“Once it gets in the marsh, it’s impossible to get out,” Charles Collins, 68, a veteran crew boat captain told reporters for the Los Angeles Times. “All your shrimp are born in the marsh. All your plankton. The marsh is like the beginning of life in the sea. And it’s in the marshes. Bad.”
Yesterday, I joined a telephone press conference with Lisa Jackson, administrator of the Environmental Protection Agency. She was doing her best to calmly cope with the enormity of the disaster. She had just come off a boat after witnessing oil piling up on shore. Joining her was Coast Guard Rear Adm. Mary Landry, who is in charge of the National Response Team.
Jackson said the federal government has ordered BP to cut back on the use of dispersants, which break up the oil but may have some toxic effects. No formal studies have ever been conducted on the effects of applying huge quantities of dispersants underwater, but limited studies in recent days suggest that this approach may be the least harmful method to keep the oil from coming ashore.
Without such treatment, the oil itself is highly toxic and a much greater concern, she said. BP has been ordered to look for less toxic alternatives than the dispersant currently being used, but safer alternatives may not be available in the quantities needed. Meanwhile, Jackson said her staff believes the treatment can be equally effective by using half or less the amount of chemical applied until now.
Keeping as much oil off the shorelines as possible seems to be the top priority. That starts by keeping some of the oil immersed as tiny droplets underwater. Oil that reaches the surface is attacked by skimmers and burned if necessary. Fighting the oil with absorbent booms and pads along the shore is the last step.
I hope this strategy is not one of “out of sight, out of mind,” because the oil immersed in the water becomes a problem of its own. It’s been compared to a bottle of oil-and-vinegar salad dressing that you shake up, breaking the oil into tiny globules that float around. Smaller globules are believed to degrade faster in the environment.
Still, with this oil starting 5,000 feet below the surface, it could take months or years to coalesce, rise to the surface and come ashore, where cleanup crews could be facing oil damage for an undetermined amount of time.
“I’m afraid we’re just seeing the beginning of what is going to be a long, ugly summer,” Ed Overton, who has consulted on oil spills for three decades, told Bob Marshall, a reporter with the New Orleans Times-Picayune. “I hope and pray I’m wrong, but I think what we’re in for is seeing a little bit come in each day at different places for a long, long time — months and months. That’s not what I said in the beginning of this. But events have made me amend my thoughts.”
Some constituents of the oil will never come ashore but will drop to the bottom of the Gulf in various locations. As specialized bacteria move in to break down the oily compounds, they will consume oxygen, potentially adding to the dead zone in the Gulf of Mexico.
If this were an earthquake, I would be reporting on damage assessments and offering hope for a renewed community. If this were an oil spill from a ship, I would be talking about worse-case scenarios and long-term effects. But, frankly, it is hard to know what to say when the spill goes on and on with no certainty at all.
To view a live video feed of the oil spill, go to BP’s web cam mounted on a remotely operated vehicle.
Official sources of information:
Other valuable links can be found on a website for Gulf of Mexico Sea Grant Programs
Last, but not least, I am learning a good deal from bloggers who are part of the UC Davis Oiled Wildlife Care Network. They are working in the Gulf and providing an insider’s view about their work with affected wildlife.