667 HAZWOPER for General Site Workers VIII

Atmospheric Testing Decision Tree

Conversation With Trainer John

Answer John's three questions about atmospheric testing before confined-space entry. John will explain each answer as you proceed.

Trainer John

Hi, I'm John. Before we assess the storage tank for entry, answer three questions about atmospheric testing.

What must be tested first?

Question 1

Choose your response:

1 Toxic gases and vapors. 2 Oxygen concentration. 3 Combustible gases and vapors.

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