The toilet structure design went through a lot of changes before a final plan was confirmed. The final plan was to use a two-tier system with the cubicles on the top level and IBC’s (Intermediate bulk containers) containers collecting waste underneath. There are 23 cubicles in total, with an 1000 litre water tank underneath each. Having an individual tank for each toilet means that if any errors with one, the system can carry on producing gas from the others and any issues can be addressed easily. The piping for the toilets also arrived on site which will link the toilet basin to the IBCs.