The department may dispose of a removed sign unless it is claimed by the owner within 10 days after the date of removal or the date notice is mailed in accordance with notification requirements, whichever is later. The department may return a sign to its owner after payment of appropriate removal costs. If an owner claims a sign within 10 days but removal costs are unpaid, the department should inform the owner of payment procedures. Unless the owner makes arrangements to retrieve the sign, the department may dispose of the sign after 30 days following the date of removal or the original date of notification, whichever is later.