While it is our understanding that a rulemaking package has been signed by the Administrator to take final action the Part 75 revisions that were proposed last year, EPA has not yet released the final rule revisions.  The Agency has, however, released a copy of the associated Response to Comments document, which sheds light on many of the apparent changes in the final version from the original proposal.  A copy of the document has been posted to our FTP Library.  RMB has also prepared a summary highlighting some of the apparent changes in the final revisions based on the Response to Comments document.