I called and spoke to seven radon mitigation companies here in Calgary and requested quotes from several of them.
RadonCare came out on top after doing all my research. It was their diagnostics, detailed description of how they were going to carry out their work and performance guarantee that put them on top.
Andrew was engaging throughout the entire process, from our first phone call, face to face evaluation/quote and diagnosis/installation of radon mitigation equipment. He provided text message and picture updates throughout the entire day of work.
Most importantly, we're seeing our numbers drop from 150-220 Bq/m3 to ~10 Bq/m3.
Thanks again Andrew - keep up the good work!