This from Mike Summa for #TBT:

For TBT- At one time the Third District, now MABAS 24 housed their Haz Mat truck at Oak Forest Station 2. # 9901, a 1970’s Ford F series pulling a trailer of unknown origin.  The Ford looks to be a retired Northern Illinois Gas truck.  If anyone knows differently please feel free to add your opinion.
Mike Summa
Division 24 Third District Haz Mat Unit,

Mike Summa photo

Division 24 Third District Haz Mat Unit,

Mike Summa photo