It probably polymerized completely and it's a giant block of nasty looking solid plastic, that perhaps can be lifted with a crane (with some support, in case it has cracks or something).

In some plastics the monomer is toxic, but the polymerized form is safe. (I think it was use for windshields for planes, so once polymerized it was probably safe to touch at least.)

In this case it was an uncontrolled reaction so I'm not sure if someone knows the exact current composition of the goo, so I strongly recommend to avoid licking it.