Layer characterized by a high degree of very compact degraded tufo (possibly degraded in part by burning activities), very likely related to a later floor surface or floor preparation. The fact that the top of the layer is more or less flush with slab floor 7067 may suggest that these two occupation surfaces were at some point in use contemporaneously (after the robbery of the rest of the slab floor of the original phase of Room 1, it seems). What may be a partially preserved tufo block in center of unit may provide an indication of the previous state of this tufo surface.