Yes there is a massive chance that the person could be irradiated damaging there soft tissue from his eyes to an old saying Radhaz is a Dadhaz. You must take a Radhaz out when working near any Radar transmitters, depending on what the transmitter power is depends on the safe distance something like a low power navigational radar the safe distance could be as low as a couple of meters, if its a high power long range radar (which this probably is) it could be as far as a mile, Then if its a directing phased array it will depend on were its pointing there are so many parameters. Most high power radars infact 99.9% of the time will need shutting down so you will need to consult with the owners, To put it in context a pencil point transmitting radar can put out 500.000w of energy a microwave oven operating near the same frequency band cooks a pie at 600w. You cannot see it but transmitting radio waves can kill so you need professional advice Ex Radar Maintainer