I managed to get a Growlithe last night. It seems that the entire property my workplace is on doesn't load Pokémon. I don't know if this has something to do with it being a government facility or if the equipment here interferes with signal (cell phone calls can randomly drop).
Whatever the case, the sign at the entrance is a PokéStop, so I will occasionally go out there to use it, and if a Pokémon loads out by the road, it will be something truly random. Maybe the sketchy loading confuses what topography we're supposed to have (mostly grass). Cubone, Magikarp, Bulbasaur, Growlithe, Vulpix, Tangela, Clefairy, Tauros, Horsea, Jigglypuff, Pidgey, Rattata. There's no rhyme or reason. Two of those are even fire types!
I get the same kind of random ass results when using a Lure Module at the PokéStop or if I use Incense while on the property -- which is the only way I've found thus far to cause a Pokémon to actually appear here (since Incense seems to draw Pokémon directly to your avatar rather than the vicinity).