On the right-hand side of the corridor is the foul water sump. The waste water from the bunker would collect in the 7 foot deep sump and, when it reached a pre-set depth, a compressed-air blast forced it to the surface for disposal. There was a Petter compressor which charged a compressed air tank for this purpose. There are no warnings to keep the unwary from stepping into this pit nor are there any rails.
Alongside the pit is a manhole access which also formed part of this system. From this part, just out of shot, rises the pipe which would have carried the foul water to the surface.
The surface plant consisted of two hoppers hinged on a rocker mechanism. As one hopper was filled it would tilt over and tip the contents over onto a clinker bed. The other hopper would then be filled and, eventually, tip its contents the other way. This device was known officially as the ‘Distributor’ but was more usually referred to as the ‘Pisstributor’ by those working on the site. The more obvious feature at the surface would have been the circular clinker bed with the rotating beams distributing water onto the surface. All that remain at the surface is some broken ground and a few bits of rubble.
