§ 280.21 Upgrading of existing UST systems.
Owners and operators must permanently close (in accordance with subpart G of this part) any UST system that does not meet the new UST system performance standards in § 280.20 or has not been upgraded in accordance with paragraphs (b) through (d) of this section. This does not apply to previously deferred UST systems described in subpart K of this part and where an upgrade is determined to be appropriate by the implementing agency.
(a) Alternatives allowed. All existing UST systems must comply with one of the following requirements:
(1) New UST system performance standards under § 280.20;
(2) The upgrading requirements in paragraphs (b) through (d) of this section; or
(3) Closure requirements under subpart G of this part, including applicable requirements for corrective action under subpart F of this part.
(b) Tank upgrading requirements. Steel tanks must be upgraded to meet one of the following requirements in accordance with a code of practice developed by a nationally recognized association or independent testing laboratory:
(1) Interior lining. Tanks upgraded by internal lining must meet the following: