Word from Ted Wolfe in Maine DEP's Division of Remediation is that his agency
"...shares your concern regarding any potentially unexploded ordinance in the waters surrounding the island. " Wolfe is confident however, that "as the site moves through the established investigative process, these issues will be discussed."
Also noted was the success that Maine DEP and US Fish and Wildlife (specifically the Maine Coastal Islands National Wildlife refuge, of which Seal Island is part) had in convincing the Corps of Engineers to uptick Seal Island's priorities score in the review process, virtually ensuring that a cleanup of some sort will indeed be carried out.
The draft Remedial Investigation/Feasibility Study will then made available for public comment to get input on the potential response and on reasonably anticipated future uses. After the Corps of Engineers has responded to the public comments, the response action is finalized in a Record of Decision (ROD) or Decision Document (DD), and, presuming funds available, gets carried out.
Citizens need to be involved in this process. The agencies welcome such participation.