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Notes and Information The acceptable concentration for 8 hours exposure to H2S is 20 ppm. Hydrogen-sulphide is heavier than air, colourless and forms an explosive mixture with air between 4.3 and 46% by volume. One breath of 1,000 ppm concentration H2S will result in death within minutes. The "Buddy System" Whenever H2S is suspected, personnel must wear breathing apparatus before entering the contaminated area and MUST have a "back-up man" (buddy), also with breathing apparatus, available. Safe Briefing Stations The Barge Captain will indicate these on the rig "black-board". There will be two briefing stations so that one is always upwind of the drilling rig. Spare air bottles will be stored at the "safe briefing area" and bottles will only be changed at this point. The "NO SMOKING RULES" will be followed outside all living quarters as soon as "Alarm Condition 1" has been put into force. As the above introduction stated, we are drilling in a very dangerous area with a very dangerous gas. As every man on the rig at all times will have to be ready for H2S, you will be trained accordingly. The rig is equipped with sufficient breathing equipment for all personnel onboard. As the accurate function of the facemask depends on how airtight the mask seals to your face, you will be asked to remove your beard (facial hair) or assume responsibility for risk of death or serious bodily harm. One deep breath of highly concentrated H2S will cause death. Therefore, when depending upon an air pressure mask to breathe, vision becomes a major factor. Facial hair may reduce visibility.
One person will be responsible for the upkeep of all breathing equipment. |
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