EMF from power lines
Thats about 360 m away from the power line? It depends decisively on which voltage is carried, but at this distance, I personally wouldn't worry about EMF. There is a scheme, where you see the distance in meters from the power line: http://www.bfs.de/EN/topics/emf/expansion-grid/basics/field-strain/field-strain_node.html 

For a 380 kV line:



The federal law in Germany permits 500 µT as limit after extensive studies, so you're far, far, far below anything risky.