Section 250.821 - Emergency action and safety system shutdown-dry trees(a) If your facility is impacted or will potentially be impacted by an emergency situation (e.g., an impending National Weather Service-named tropical storm or hurricane, ice events, or post-earthquake), you must: (1) Properly install a subsurface safety device on any well that is not yet equipped with a subsurface safety device and that is capable of natural flow, as soon as possible, with due consideration being given to personnel safety.(2) You must shut-in (by closing the SSV and the surface-controlled SSSV) the following types of wells: (ii) All gas wells requiring compression.(b) Closure of the SSV must not exceed 45 seconds after automatic detection of an abnormal condition or actuation of an ESD. The surface-controlled SSSV must close within 2 minutes after the shut-in signal has closed the SSV. The District Manager must approve any alternative design-delayed closure time of greater than 2 minutes based on the mechanical/production characteristics of the individual well. 81 FR 60918 , Sept. 7, 2016, as amended at 83 FR 49257 , Sept. 28, 2018