UHF Antenna install question

Hello to all, I have a question about installing a omnidirectional uhf antenna for the 460 MHZ band ontop of my roof. I live above a small radio repair shop, and I have a 5 foot tripod installed on my roof top with a UHF YAGI HDTV antenna. The owner of the repair shop informed me that he will be installing a omnidirectional uhf antenna for the 460 MHZ band which is going to transmit as well as recieve. My question is that if he mounts the antenna to the existing masting, will that interfere with my plasma tv’s digital tuner? I guess I’m just concrened that when he makes test transmissions it will somehow damage my tv set since the antennas will be very close together. He says it will be just fine, but I would like to be sure. Thanks in advance, Bill