Scout's Toolbox Talks

Just because a confined space looks safe doesn’t mean it is. Toxic gases and oxygen deficiency are invisible killers.

Why It Matters:

Workers have died entering spaces that appeared fine — only to be overcome by gases or a lack of oxygen within seconds. Testing the air before entry is not optional. It’s the law and a life-saving practice.

Key Points:

• Always test for oxygen level, flammable gases, and toxic vapors before entering a confined space.
• Use calibrated gas monitors or atmospheric testers with sensors for:
  • Oxygen (safe range: 19.5%–23.5%)
  • Combustibles (below 10% of the Lower Explosive Limit)
  • Toxic gases like hydrogen sulfide or carbon monoxide
• Test from outside the space. Use a probe or sampling pump to check top, middle, and bottom layers.
• Never enter a space unless the atmosphere has been confirmed safe and continuous monitoring is in place.

✅ If you don’t test, you’re guessing — and guessing can be fatal.

Ask the Crew:

• Are we testing every space before entry?
• Do we have a calibrated gas monitor ready and working?

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