Area: C, The SU is a rectangular cut into the Opus Signinum surface SU 2201.

Area: C, Opus quadratum wall

Area: C, The SU is a layer of yellowish brown silt.

Area: C, The su is a layer of tufo running east-west in south part of area.

Area: C, The su is a layer of tufo running east-west in the south part of area.

Area: C, The SU is a layer of brown silt in the south-central part of the area.

Area: C, This SU was an opus signinum surface south of 2203.

Area: C, The SU is a wall of tufo blocks with an east-west orientation in the central part of the area.

Area: C, This SU is a wall of worked and irregular blocks with N-S orientation.