This layer, filled with broken roof tiles intermixed with painted plaster and soil probably represents either a collapse layer or a dump site for tile. Large amounts of broken tile (tegulae and imbrices) were found throughout the layer varying in size from very small to just smaller than the size of a cassetta. A significant amount of rubble was alos present, distributed throughout the layer. Underlying the west end of the layer is a section of well preserved crushed tufo floow; unerlying the east end is bedrock. Underlying the center of the layer, where the tiles were most heavily concentrated, only a poorly preserved preparation layer for the tufo floor is present. This same layer fills the round cut and the curving cut in the bedrock in the NE area of the room (room 5).