The inventory is ~97-98% accurate; all the decals and vehicles and exact, except for the Excavator, in which I had to add three MOC-assemblies to recreate the digger bucket and its arm. It functions, all connections are correct, but there are 16 extra parts or so in the inventory.

I also used three separate parts instead of part #3491, 2x5 Plate with Towball Socket, in the trailer.

=MISSING PARTS=
https://rebrickable.com/parts/3491/plate-special-2-x-5-with-towball-socket/
https://rebrickable.com/parts/3314/vehicle-digger-bucket-arm-small-2-x-6-x-2/
https://rebrickable.com/parts/3317/brick-special-1-x-2-with-digger-bucket-arm-holder/
https://rebrickable.com/parts/784/vehicle-digger-bucket-smooth-2-x-4-x-1/

=MISSING DECALS=
https://rebrickable.com/parts/4865pb04/panel-1-x-2-x-1-with-classic-fire-logo-print-1656-6389/

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This set no. 1656 'Evacuation Team' came out in 1999 as a part of Town's "Fire" subtheme. As a limited release, it never appeared in regular Lego consumer catalogs and was pretty rare.

Clocking at 230 parts, the 'Evacuation Team' was a relatively large set for the Classic Town era but still only came with two minifigures, so technically it'd be a "middle" size, I suppose.

It comes with two Fire Station cars, but instead of a regular fire truck, here is a rather unusual semi, carrying a large flatbed trailer with a tiny yellow Excavator. There are also various accessories and additional tools, including a wheeled cart with a console and searchlights—mounted neatly on top of the trailer's shoe connector.

The trailer also carries two road barriers and 2x2 roadsigns, all neatly packed in a square on the trailer's elevated front. Ingenious design, looking equally good "on the move" and once firefighters unpack and begin the rescue action!