You want to bet that if an RDD was set of in any major city in these states these Congressional delegations would not think twice about relaxing the standards........
Y'know, they might just not want to. Look at it this way: Those lands would be "set free" from human presence, which some environmentalists consider a curse upon the Earth. I could see a few Congresscritters pushing for no cleanup, just let it be and let Nature heal it.
On the other hand, though, the rest of the delegations would see it as a wonderful way to get more Federal dollars for their states, and would be pushing for a "cleanup" tax and so forth. They have to get in on the victimillionaire lottery, don'cha'know?