You may want to monitor all
the licensed frequencies for the City of Nappanee just prior to a test, not including the frequencies already noted in the database for Police/Fire use assuming you've already attempted to monitor those frequencies for a siren activation. You can probably ignore the 123.0 MHz frequency as well since it appears to be aviation.
You might be able to get something a little more definitive if you were to click on the Report Button (
) on the top right of your post and request that this thread be moved over to the
Indiana Radio Discussion Forum in order to receive much more local responses as opposed to posting in a general spectrum forum such as this one.