R 324.1128 Servicing; requirements.

Rule 1128. Before commencing an operation that requires removing the seal between the tubing and production casing, a permittee of a well shall meet all of the following requirements: (a) Blowout prevention equipment sized to accommodate the tubing and rework drill pipe shall be installed and tested for class I H2S, class II H2S, and class III H2S wells. (b) Primary and secondary briefing areas shall be established for class I H2S and class II H2S wells. (c) The same safety equipment that is required under R 324.1102(d) is required for class I H2S and class II H2S wells and under R 324.1102(d)(viii), (ix), and (xi) is required for class III H2S wells. Safety equipment shall be located at the primary briefing areas for class I H2S and class II H2S wells and at the well site for class III H2S and class IV H2S wells if required for class IV H2S wells. The supervisor or authorized representative of the supervisor may require the use of safety equipment, in addition to the equipment listed in R 324.1102(d), if the equipment is necessary for the safety of the public or the workers. (d) An electric or mechanical fan shall be located at the well site for class I H2S, class II H2S, and class III H2S wells. The fan shall be operated constantly during the operation to keep the wellhead area free from gas if natural ventilation is inadequate. (e) A hydrogen sulfide detection and warning system shall be installed and have the detector located downwind from the well or in the direction in which the fan is blowing. The detection and warning system shall activate visual alarms if a hydrogen sulfide concentration of 10 ppm is detected. Audible alarms shall be activated if a hydrogen sulfide concentration of 20 ppm is detected; however, the use of a hydrogen sulfide detection and warning system is optional for a class IV H2S well. (f) Signs that have the word "Danger" or "Caution" followed by the words "Poison Gas" shall be installed at the entrances of all access roads. (g) The supervisor or authorized representative of the supervisor shall be notified before the start of servicing operations for class I H2S, class II H2S, and class III H2S wells. (h) A revised and updated contingency plan shall be at the well site and shall be reviewed with all workers for class I H2S and class II H2S wells.