The H-15 mechanical integrity test is required for shut in production wells of various ages. The H-15 test does not apply to any well with an active injection of disposal permit. Injection and disposal wells are required to perform MITs based on Form H-5, which is a more thorough test than the H-15.
If you have received notice to perform an H-15 test on your injection or disposal well, it is probably a scheduling program error. We suggest you send the notice back to the Commission, to the attention of the Record Codification section (at the main Austin address), with a note to the effect that "This is an injection/disposal well that is subject to H-5 pressure testing. Please remove from the Form H-15 testing schedule." If you have any questions, you can call the Record Codification section at (512) 463-6905.
Recent amendments to Statewide Rule 14 complicated the issue slighly by requiring shut in wells to demonstrate mechanical integrity every 4 years. This requirement may require shut in injection wells to perform an injection well MIT (Form H-5) one year early to satisfy the SWR 14 requirement. Alternatively, a shut in production well MIT (Form H-15) can be performed, but it will only fulfil the SWR 14 requirement, and have no effect on the injection well MIT schedule.