owner
(4) The term “owner” means— (A) in the case of an underground storage tank in use on November 8, 1984 , or brought into use after that date, any person who owns an underground storage tank used for the storage, use, or dispensing of regulated substances and (B) in the case of any underground storage tank in use before November 8, 1984 , but no longer in use on November 8, 1984 , any person who owned such tank immediately before the discontinuation of its use.