Hydrogen Sulfide Special Precautions
API Condition III - High Hazard Area - Work locations where atmospheric concentrations of H2S are greater than 30ppm (OSHA). Any operation expected to bring free hydrogen sulfide gas to the surface. The following are recommended for work in high hazard areas:
- Two NIOSH/MSHA approved, 30-minute, self-contained breathing apparatus for emergency escape from the contaminated area only.
- The use of three wind socks and streamers.
- The use of an oxygen resuscitator.
- Two hydrogen sulfide detectors. One should be a properly calibrated, metered detection instrument, and the other should be a pump type with detector tubes.
- The use of a separate audible and visual warning system.
- Employees should not be permitted on location without hydrogen sulfide safety training. Employees may be permitted on location for specific hydrogen sulfide training purposes not to include general rig training.
- Two means of egress at each location in a high hazard area should be provided.
- A means of communication or instruction for emergency procedures should be established and maintained on location along with the names and telephone numbers of the person or persons to be informed in case of emergencies.
- Signs should be posted 500 feet from the location on each road leading to the location warning of the hydrogen sulfide hazard.
- All hydrogen sulfide safety equipment should be checked to ensure readiness before each tour change.
The recommendations and employee instruction will vary depending on the type of area.
Knowledge Check Choose the best answer for the question.
7-8. Which of the following is true concerning API Condition III - High Hazard Areas?
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