For what it's worth I think this job is just a ruse to generate heightened levels of interest in the new CLEAN Association, enticing prospective members with the lure of lucrative new contracts (although the jobs themselves are a secret and all of a sudden it is fully resourced with 46 people having been recruited in the blink of an eye, but don't worry, there will be other work

)
I've been doing large and VERY large jobs for decades and I can tell you that this one just doesn't smell right.
Jobs of this size, with this many people involved are planned, not days before, but weeks, even months in advance and the team is built meticulously ensuring that each of the 23 teams can produce identical results, you can't achieve that level of detail in a couple of days with a one line introduction on an internet forum.
Simon