Discuss the special air monitoring requirements in underground works.

Special air monitoring requirements in underground works are essential to assess and manage air quality, ensure the safety and health of workers, and comply with regulatory standards. Underground works such as tunnels, mines, and underground construction projects present unique challenges due to confined spaces, potential exposure to hazardous substances, and the need for effective ventilation. Here are key considerations for air monitoring in underground works:

1. Gas and Vapor Monitoring:
   • Continuous monitoring for gases and vapors is crucial, including oxygen levels, combustible gases (e.g., methane, hydrogen), toxic gases (e.g., carbon monoxide, hydrogen sulfide), and other hazardous airborne substances.
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