Cut through the floor (SU 5848, 5815). There are some tufo blocks in the lower SW corner, which may represent all that is left of spoliated material removed with this cut - perhaps a small staircase for entry into the shop over ashlars 5825, which are otherwise too high to permit easy access (?). The cut could also be related to the holes to the northeast, which clearly relate to repair of the drainage features (no such features are at the bottom of this cut, but those making the cut may not have known this).