Review the diagrams in sequence to see how a subsurface investigation is  accomplished by backhoe trenching.

1. Situation  2. Start Digging  3. Soil Staining
4. Soil Layers  5. Overall Picture

1. Situation:

2. Start Digging:

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3. Soil Staining:

4. Soil Layers:

5. Overall Picture:

Also, see the slide show sequence for a soil gas survey.

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