SU 8395 is a layer of opus signinum that served as the bottom of the basin in the northern half of Room I-22, prior to the building of a new signinum above it (SU 8393), probably when the lower layer degraded beyond repair. Due to poor preservation of both these layers and of the wall signinum SU8394,it remains unclear if 8395 and 8394 form one continuous (and stratigraphically equal) basin. See SU 8393 for further interpretation of these related features.