Rain from yesterday ruined the floor and in the morning there was little we could do in WSAC3 aside from break the last of the large boulders and pick up the fragments. The mud had coated all of the stones of the floor and scraping it only made it worse, so after talking to Lori I decided to let the guys go at 1. In the morning we moved the rock piles along the NE baulk and SW baulk, and after breaking the rocks on the floor I had the guys clean the tops of the walls where weeds still remained/were already growing back. In the morning I measured the walls of WSAC2 and WSAC3 to make them built loci, and after lunch I finished drawing the tops of the walls in both operations. I also did the NE baulk drawing, which was slightly difficult because of the rain and I might touch it up tomorrow (i.e. seeing strata). Hopefully tomorrow its dry enough for us to sweep, take floor photos, take soil samples and clean, and then final photos.