Fortunately, it's pretty likely that many of those toxins won't be particularly harmful in low doses; but the stress isn't good, that's for sure.

A similar (worldwide) problem are all the maritime shipwrecks stemming from that period: https://www.newscientist.com/article/mg20727761-600-why-wart... https://www.thedailybeast.com/the-ticking-time-bomb-of-wwii-... https://www.youtube.com/watch?v=OP0U62oiBlM