Today, various FOIAs released by the Department of Defense revealed that the actual OPR for
maintenance of DOD's Agent Orange list, by which VA determines exposures outside Vietnam, is the DOD Armed Forces Pest Management Board in Silver Spring, MD.
Because the AFPMB library contained only two Agent Orange C-123 articles (dated 1963 and 1981) and none of the more current scientific literature, a collection of relevant materials was provided by the C-123 Veterans Association.
Here's how the VA uses a site's absence from the DOD list to deny veterans' exposure claims. It explains a lot about why VA opposes any additional sites added to the DOD list, regardless of historical or scientific justification:
Today, the Chair of AFPMB, CAPTAIN Eric Hoffman USN MC, was asked to reconsider his organization's earlier recommendation to the Secretary of Defense and to add C-123s.