Tag: Toxicity Tests

About those New EPA Dispersant Tests

Perhaps you heard about the recent EPA Press Release, regarding latest Toxicity Testing results for Dispersants.   Depending on which sound bite you heard, it almost sounded like Corexit got a clean bill of health.

Confused?  I was too.   And since I had previously written a well-received diary,

Corexit Toxicity Tests not so hot, When Mixed with Oil

by jamess  — May 30, 2010

which dove into the Toxicity Data, that the EPA originally cited as credible only 2 months ago, I figured I should try to figure out what was up with the ‘New and Improved’ Dispersant Testing.

What follows is my assessment of what’s happening now, including some relevant links.

I’ll try to keep it brief. (I hate long diaries, lol)

Other Dispersants, Twice as Effective, Half as Toxic, and Not yet Used

Dispersants add to Gulf spill’s toxic threats

Susan Buchanan — June 1, 2010

The EPA on May 10 authorized BP to use two dispersants-COREXIT 9500 and COREXIT EC9527A, distributed by the Tennessee and Texas units of Nalco Co. in Illinois. BP had already applied those products at the spill site for nearly two weeks. As concerns about COREXIT grew, however, the EPA asked BP on May 19 to find a less-toxic dispersant within 24 hours, and to start using its replacement in 72 hours. BP answered that it wanted to stick with COREXIT.

Frustrated EPA and Coast Guard officials said the company’s response was inadequate, and told BP to start reducing its use of surface dispersants. But in a decision questioned by some scientists, officials said BP’s subsea or underwater dispersant use, authorized in mid-May, could continue.

Last week, the EPA and the Coast Guard said that they would start calling the shots about BP’s dispersant use and that COREXIT applications could be scaled back by as much as 50% to 80%.

COREXIT should be scaled back to 0% —

Especially since BETTER options are available NOW.