The SU is a rectangular cut through the Opus Signinum surface (SU 2201) in a room of the 2nd c. BCE "house." It is truncated to the south by ditch SU 2206, but continues south on other side of the ditch. No sides or bottom of the cut are visible in the section, so the visible part is either the bottom of the cut, which stopped just after the Opus Signinum surface SU 2201, or (less likely) the cut extends beneath 2201 and its fill cannot be differentiated from surrounding layers. During post-excavation study, this feature was reinterpreted as a late spoliation cut that is truncated by SU 2206.