[amluto]

If I were in your position, I would ask (privately, to avoid unnecessarily freaking everyone out) what their limits on stray voltage and stray current are outside the substation and what they do to control and monitor it. 60 Hz radiation doesn’t seem like a credible risk at all to me. 60 Hz conducted emissions, on the other hand, can very easily kill you — imagine crawling in hands and knees two feet from a downed powerline.

I would like to imagine that regulators and utilities have this under control, but making some effort to verify this could be reasonable.

(49 states permit utilities utilities to ground a current carrying overhead wire at utility poles, resulting in parallel currents in the ground. I’m not aware of this being a documented hazard to people, but it’s a documented problem for cattle. CA is the exception.)