Rockville,MD. Mack collapse unit

[Guest]

I'm sure some on here are familiar with the history of this rig, supposedly the 1st roll-off POD design in the US.

My questions are: what was the actual in-service date?

An ex-MCFRS and Rockville VFD member says I either have a faulty memory or bad info.

What is this rig's current status?

Thanks for any assistance...

Photo taken 10/1992 by WW Jenkins