unblocking a sewage filled manhole  

Interesting job this one, the usual raw sewage with a twist, there was another hidden manhole buried under the drive underneath a load of shingle. The customer mentioned he thought it may have collapsed due to the car wheels resting on it. Anyway I cleared the original manhole but mentioned to the customer I wasn't happy and I was going to find the hidden one, when I found it, the cover was seated in a thin plastic frame and was quite bent and sunken, when I lifted it I found loads of weeds and a tile grouting plastic bag causing the main issue.
customer instructed me to replace the manhole cover and frame with a cast iron one suitable for traffic. I also bedded in the plastic access chamber cover on the original.
so it turned out to be an interesting job, drain unblocking and a bit of building work.