Do the signs ever get to the point and say that it's about radioactivity?

Leynos · on June 7, 2016

Yes.

The first written message a visitor to the site would encounter reads:

    DANGER

    POISONOUS RADIOACTIVE WASTE BURRIED HERE

    DO NOT DIG OR DRILL HERE BEFORE 12000 AD.

This message is to be rendered in seven different languages. Subsequent messages explain the situation in more detail.