Continuing the story with pole ;-)
It has been 3 days since marking it as dangerous object, reconditioning team shows up, when i later saw this picture and schema in closeup i got shocked how simple thing they had to draw. In Poland it would be without any schemas measured by the eye, and here very precise schema, everything measured and marked etc.
When they finished final effect is like this:
They will probably take this sign in few days when everything settles down…