E-W aligned wall extending from eastern LOE, abutting wall 4040. Dolostone, 0.30x0.20m average size of materials, roughly finished, random coursed, wall foundation, north and south facing, whitish lime mortar with occasional small gravel inclusions.
Greyish limestone layer under 4021. Soft light whitish grey sandy silt with rare small sub angular stones. Similar to 4030 but may have been left from 2019 excavations