
Key takeaways
- Low oxygen and toxic gases build up inside closed underground tanks.
- Ventilate the tank, test the air with a gas detector, use harnesses and keep a standby person outside at all times.
Hazards
Low oxygen and toxic gases build up inside closed underground tanks.
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Protocol
Ventilate the tank, test the air with a gas detector, use harnesses and keep a standby person outside at all times.


