[A Chemical Makeup Question]

I was stationed in NYC on Govoners Island while in the coast Guard. I was all over NY Harbor, had to jump in that nasty bay to save people trying to kill themselves (jumpers from bridges) and worked bouys while on a ship. I recently found out about the Diamond Alkali site, also GE dumped PCPs into Hudson, and at the time NY was only reclaiming -40% of their sewage. All my issues can be traced to these two toxins. I'm using reports from EPA and Riverkeepers to show that there are still toxins in the water. I was there from 1986-1990. Do you think I need nexus letter still? Had my C&p exam 2 days ago and it went well, everything was well documented