Structure A3 was identified at a muh lower elevation in square W400 , about 2m deeper than A7, and 4,5m above the base level. It was not a dwelling structure bt probably a specialised workshop space. It consisted of a large area delimited by a low wall of compacted clay and stone fragments. The two orthogonal sides uncovered in the exposure revieled that the structure probably had a rectangular shape, at least 3 by 4m wide. The entire structure looked like a peculiar wide basin, occupied by a thick layer of pure clay. Only one hemispherical cup was found in the structure, which was interpreted as a clay decant pit, possibly related to pottery production.