If I may be permitted to chime in from the "Best Coast" of Canada, there are similarities to Vancouver's EDACS system and Ottawa's, Vancouver went live in 1999, it is a GVRD wide system encompassing many municipalities , all Police RCMP & Municipal , Vanc, Delta , NEw West , Port Moody etc went this system,
Vanc fire went from 151 mhz to 800 overnight,
your 800 mhz freq's are similar to what ours are,
Vanc Fire has 16 channel radios , 3 fire ground tactical channels on the radios are T3 866.1875 simplex w ctcss (freq is not part of any trunk) , T4 853.2625 (ctcss), T5 853.5125 (ctcss) all simplex
here in the west IC has give the band of 851 mhz-854 mhz almost exclusive simplex use, the most recent example is the 2010 Winter Olympic village for the participants is being built and the construction company uses a dozen or so simplex channels all 851-854 mhz, I have also logged other groups here throught out the lowermainland using these freq's all low power simplex, the only exception is athe the local airport in Richmond (old CP now Air Canada uses a 12 channel very low power trunk w/8 freqs at 851 -854 then four freq's from 862-865, you drive away from the airport and once you've climbed over the Arthur laing bridge into Vancouver up Granville st you have practically lost signal so IMHO I would suspect what you are looking for is between 851-854 mhz . With a few execptions other simplex in use by Police and fire here programmed by -E-Comm is 866.1875 & 866.2625 (not in use as a repeater pair?) yes we use the ITAC's as well but not by fire , only Police.
I don't see IC allocating these any differently in the west than the east due to our proximity to Washington state & Ottawa's proximity to New York state.