All of the freqs listed for Belleville and Van Buren Twp. are confirmed. I have even heard activity on them in the past. Most of the simplex freqs are used when they have special events, or the local Strawberry Festival.
Currently, Van Buren Twp. dispatches all emergency services for the city of Belleville. The Belleville Fire Dept. units are 450-470, on 151.100 MHz. Whereas, the Belleville Police are the 800 series units on 155.790 MHz. They can use 155.835 as a backup for all agencies.
"A bank is a place where they lend you an umbrella in fair weather and ask for it back when it begins to rain." Robert Frost.