EE WAS BOLTING FF SISSOR DECK, CHUCK TENDER CAME LOOSE FELL INTO WATER WHICH CONTAINED CEMENT FROM RECENTLY SHOT CRETEING. EE WENT INTO WATER WHICH WAS OVER BOOTS TO RETRIEVE CHUCK TENDER. EE WAS GIVEN INITIAL FIRST AID, CHANGE OUT BOOTS. WORKED 2 SHIFTS SEEKED MEDICAL ATTN.