Well at 30/ΛΣΤ Coins (none useful) 25 May 1938 #3-#6 26 May 1938 #3-#4 ... Early 3rd cent and of 4th-6th cent. A.D.
May be of Hellenistic origin when cistern system went out of use. For a general note on the cistern see Nb. ΟΕ III, pp. 246 ff. Objects from B 586 various depths (no subdivision): S 2324-S 2330, P 34894, ... Late 2nd-early 6th c. A.D.