SU 5536 is a concrete deposit associated with the placement of three tufo blocks, SU 5529, which sit under a different concrete deposit (which runs over 5528) under wall 5363. 5536 sits on top of block 5438 and abuts early red tufo wall 5437 and seems to be a part of a reconstruction and northerly shift of the southern limit of room 11 (no longer preserved except here).