The report of the 2009 toxin survey was released in PDF form by Hill AFB as a result of our FOIA. It is available for download here.
In general, it surveys by tail number the surplus C-123s at Davis-Monthan, thus including some of the Westover aircraft. Toxin numbers seem small compared to earlier reports, and I need some science here to learn whether dixon would degrade over the years the planes were stored, especially considering the conditions under which they were stored in the desert heat. Hill reports that the remaining C-123K aircraft were too contaminated to do anything with but...shred and melt into ingots!