I live in Sarnia, and have been around town many times as well as the surrounding communities. Sarnia is known for the Thunderbolt 1003s over in the Suncor plant as well as its extensive network of ATI HPSS-32s. I've found a few more sirens around the area, which I want to note.
Sarnia - Federal Signal Modulator 3012, located in the CN railyards. It activates every week as part of the siren tests.
https://www.instantstreetview.com/@42.9 ... .26p,2.84z
Point Edward - Federal Signal Model 2? located at the fire station. Unknown if it participates in the weekly siren tests or used for fire calls.
https://www.instantstreetview.com/@42.9 ... .89p,1.57z
Dresden - Federal Signal Model 5? located on the fire station. Appears to be in poor shape, unknown if it is used or tested. I'll have to ask my dad's friend who lives up there next time we head out there.
https://www.instantstreetview.com/@42.5 ... .96p,1.66z
Brigden - Federal Signal Model 5?, located at the fire station. Unknown if used, haven't been to Brigden in a while nor do I know anyone from there to ask.
https://www.instantstreetview.com/@42.8 ... .72p,3.11z
Just a wolf, siren enthusiast and railfan.
Rewrote almost the entire ARS Wiki, former admin of the CDS Wiki
Proud owner of an FS&S Model L, Sterling Type F, and soon a mini FS 500AT!