40 CFR 63.1090 - What reports must I submit?
If you delay repair for your heat exchange system, you must report the delay of repair in the semiannual report required by § 63.1110(e). If the leak remains unrepaired, you must continue to report the delay of repair in semiannual reports until you repair the leak. You must include the information in paragraphs (a) through (e) of this section in the semiannual report.
(a) The fact that a leak was detected, and the date that the leak was detected.
(b) Whether or not the leak has been repaired.
(d) If a leak remains unrepaired, the expected date of repair.