The Arabs had deliberately destroyed a lot of artifacts while excavating under part of the Temple Mount with BULLDOZERS, in an attempt to erase signs of Jewish history and previous occupation of the site. They then dumped their resulting rubble into the city dump.
By using the provided garden hose by each sink to rinse off the rubble in your bucket poured over the sieve, and then sifting through the contents of each bucket, participants found ancient Roman coins, burned animal bones (from sacrifices?), Byzantine tile (that's what I found), and numerous other artifacts. This sounds like a project similar to this.
It’s funny the UN never condemned the deliberate destru- yeah, I couldn’t get through that without laughing. Anyway, sounds fun!