154.28 is kinda the arkansas statewide fire mutual aid radio channel

https://forums.radioreference.com/threads/arkansas-fire-mutual-aid-frequencies.460485/

there are also fire mutual aid talkgroups on the State TRS but no one
ever uses them - maybe just 1 county primarily uses the state trs -
everyone else is still vhf highband - sounds implausible - need to
reconfirm