i understand tests, many have been done , for what purpose i don't
know .  maybe to see the affect of fall out in burning waste.  the
section of manganese poisoning listed under parkinsons, in commercial
ads by attorneys in suits for now related exposure, {i dont remember 
how and where,[ 78s tough age to put things together] but there are
pages of agencies and many listings by sandia with a e-mail names to
contact.  i did, no reply,   as to incubation period, mine started
early after discharge from service. particularly in leg area.even
today with loss of balance my upper body reacts fast to save a fall
this even when sinemet is working or not.  never contacted v.a.until
recently  petroc-ga

Hi Petroc - - I've read through many of those test reports.  Other
than anecdotal material about nuclear fallout, most of the studies
have to do with manganese additives to gasoline, welders problems with
manganese exposure and the use of manganese additives in other
consumer products including adsorbents, batteries, catalysts, catalyst
supports, detergents, protective coatings, and more.  None of them (at
least none available to the public) deal with manganese exposure due
to military action during wartime.

I'm keeping our exchanges in the comments section otherwise you would
be spending a lot of money on as of yet non-existent answers.  I wish
I could be of more help, but the specific material needed to answer
your question seems to be missing from the public domain, if it exists
at all.

There is a lot of "looking" and "asking" going on by many others
besides us.  The well is still dry even with all the effort being
expended to dig it out.

digs