BP, the US government, and possibly even Evergreen has sprayed at least a million gallons of Corexit dispersant on the spill.
The Evergreen Supertanker 747 may fly over the Gulf Coast in coming days, dropping a substance that could break up oil that threatens to damage the
“These substances typically require light coverage, about 5 gallons per acre,” Baynes said. “With our plane’s capacity, we could lay a line
200 feet wide and 300 miles long.”
Now, the EPA knows exactly what chemicals are in Corexit, because they are monitoring them.
EPA’s TAGA bus is now monitoring the air along the Gulf Coast for two chemicals found in the COREXIT dispersants: 2-BE (2-butoxyethanol), and
dipropylene glycol mono butyl ether, which have the highest potential to get into the air in any significant amounts. EPA has been monitoring for
these chemicals since May 18, 2010.
So, let's take a look at the results.
Here's May 25th, one month into spill.
Now, take a look at June 6th results
The 2-butoxyenthanol, , appears to be rising quite significantly.
According to the National Ambient Volatile Organic Compounds Database
(Shah and Singh, 1988), the average daily home indoor air concentration of 2-butoxyethanol is 0.214 ppb (1.0 µg/m3)
Now, the detection limit for 2-BE in the June 6th sample was .7 ppb. One reading was
9.4 ppb. That's 13 times the detection limit.
Shouldn't someone be sounding the alarm, or at least give out a public safety alert?
In addition to being found in the COREXIT dispersants, these compounds are found in cleaning products and coatings. As a result, we may not be able to
identify the source of the measured compounds. The very low levels we are seeing suggest that the use of dispersants on the oil spill is currently
having an insignificant impact on air quality on land.
[edit on 10-6-2010 by OurskiesRpoisoned]