Lol well after only a cursory glance, I can tell you it's a load of crap lol. The blue pins probably aren't shelters, I'd have to open the pdf to know exactly what they are supposed to represent, but considering two of those are pinned on two of the Montreal bridges and there's zero shelter there, I wouldn't put much faith in it. As for the actual nuclear symbol icons, one of those is in Joliette, close to where my dad is. If you zoom it on the map, you'll see the name says Leblanc Illuminations. I've actually been there, it's a light fixture and neon store, it's about as much a fallout shelter as my right buttock lol.
Some random guy off the web probably pdf'ed this one night when he was bored. Lord only knows where he took his info from. Most likely his imagination