"My reading is that "in the plane" literally means in the plane, +- a couple or tens of meters, depending." What wad said was so vague as to be practically use

"My reading is that "in the plane" literally means in the plane, +- a couple or tens of meters, depending." What wad said was so vague as to be practically useless. "...they give examples of accelerators buried at 300 meters which would create a radiation hazard at a radius of 62 kilometers" Again, this is overly vague and unhelpful. As I replied to LegitShady, no specific mention is made about the type of radiation dangers or how long radiation would be expected to linger in soils etc.