With a very low elevation of 1.5 degrees from your location, the only way to receive this satellite is if there's no tall trees (18 meters average height) at least 500 meters away or if there's no 2 storey homes from your location at least 110 meters away towards the satellite's azimuth (i.e. 87.6 degrees on your compass). You will need to insert a dielectric plate inside the throat of your C band LNBF in order to convert it from a linear to a circular LNBF. Nowadays, most C band LNBF's come with the plate but you can buy it separately if it did not come with it.
Even with no obstructions, the other challenge you might experience is occasional signal fading due to increased interference from having the dish aimed so low towards the horizon. A larger dish will help reduce the impact of this interference so although the minimum dish size for this satellite at your location is 170cm, I would go with at least a 240cm dish in order to reduce interference issues.
It's worth a shot though assuming you have no obstructions at your location. Start off by trying to receive a higher elevation circular C band satellite such as Intelsat 1R at 50W which has an elevation of 7.3 degrees in Calgary. Once you are aimed on this satellite, carefully tweak the skew and focal point of your LNBF by rotating it and/or pushing it up and down on the scalar ring for maximum signal. Also, the depth of the dielectric plate inside the LNBF also has an impact on signal quality so adjust that as well. Once you have Intelsat 1R tweaked, you have a much better chance of getting NSS 806 by lowering the elevation and turning the dish to the left when standing behind it.
Please let us know if you have any other questions, we are here to help!