Metal slag was found at every level, and often-rebuilt furnaces. (H.J. Franken, "The Excavations at Deir ʿAllā in Jordan" Vetus Testamentum10.4 [October 1960, pp. 386-393], p 389).
There had been earlier, but unrelated Chalcolithic inhabitants of the tell. (1961:371)Franken
H.J. Franken, "The Excavations at Deir ֝Allā in Jordan: 2nd Season" Vetus Testamentum11.4 (October 1961), pp. 361-372.