Jeffco U/D: Numerous additional units being toned for Wadsworth Ridge including West Metro, South Metro, Aurora and Littleton. Ops Red SW, DTRS Ops 5 and Fern.
I can't imagine they'd have a system just for fire protection; I've heard their FF's on different talkgroups within the L/M trunked system- their idea of interoperability- so they can talk to the company department affected by the incident happening.
Anyway, this link did me well for the time I lived close to the plant. used my BC235, one of the first trunking radios, to receive and still use it today for L/M.