Not really. Seems fairly straightforward. The aforementioned noncom stripe (descriptions can vary). Garrison was said to be a chief warrant officer, so having a stripe like that would correspond with that. You mean on some hazard team vests? Those aren't rank stripes. Firefighters wear similar wide stripes on their jackets (they reflect light, which comes in handy in dark, hard-to-see environments). I don't believe her rank was ever mentioned onscreen though, so I'll go with the no stripes meaning enlisted. There was also a commander rank during that time.