AL Water Projects Practice Questions - Alabama Water Projects Contractor Examination Exam

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A cohesive soil tests at 1.6 tons per square foot unconfined compressive strength, but the trench is next to a vibrating compactor and the soil was previously excavated for an old main. How should it be classified for OSHA sloping?

Type A, because the strength exceeds 1.5 tsf Stable rock, because it is cohesive Type A if the contractor prefers a steeper slope Not Type A; fissuring, vibration, previous disturbance, or seepage disqualify Type A regardless of strength

Correct Answer:

Not Type A; fissuring, vibration, previous disturbance, or seepage disqualify Type A regardless of strength

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