During post-excavation study, this feature was reinterpreted as leveling activity perhaps related to the flooring of southern facing rooms related to the spaces delimited by walls 2372 and 2373 in the area south of Space 1A-7. Later leveling activity, however, has eliminated any structural remains of the southern part of the Phase 1A building.

The SU is a layer of accumulation south of the courtyard space and running to the east, south of Space 8. This deposit also runs north of wall 2306 (SU 2472). This uniform deposit of accumulation seems to cover most of the area south of the courtyard.