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15PERMANENTLY CLOSED9Means a container or facility for which: ƒAll liquid and sludge has been removed from each container and connecting line; and ƒAll connecting lines and piping have been disconnected from the container and blanked off, all valves (except for ventilation valves) have been closed and locked, and ƒConspicuous signs have been posted on each container stating that it is a permanently closed container and noting the date of closure.ƒ“Permanently Closed” containers are exempt from SPCC rule.