Trench Rescue Awareness Test



4. All trenches must be protected unless:


1. They are made of stable rock.

2. Up to 15 ft deep.

3. Less than 5 ft deep including the spoil pile.

4. Class B soil.

5. Contractor clears the area.

6. Atmospheric conditions should be checked for at least the following:


1. Oxygen

2. Toxins (in PPM)

3. Flammable gas levels

4. Insects and snakes

5. Soil types

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