Yes it seems like they haven't gone far enough afield to deal with this; electricians aren't really equipped to deal with RF problems and if the 'Ministry of Innovation, Science and Economic Development' actually employ any token technicians among all their lawyers it will probably still be a long wait unless someone in Carstairs has pull.

Carstairs is 60 km north of Calgary where you find the Calgary Amateur Radio Association (mission: "Have Fun and Serve our Community"), University of Calgary Amateur Radio Club and other organizations, all of whom would be thrilled to break out their spectrum analyzers and nail this to the wall for free.

If it’s a harmonic of a lower frequency, one could try dialing in 105MHz into an analog-tuned FM radio and seeing if there’s anything odd coming through.

I’ve used this for assessing some harmonics of 4-5 MHz clock lines causing issues.

USB interface SDRs and spectrum analyzers capable of up to only around 1000 MHz are really cheap now.

https://www.nuand.com/

At 315Mhz you might even be able to do it with a $10 RTL-SDR.