A valid density test confirms that a utility backfill lift fails the project requirement, which requires each lift to pass before covering. The next truckload is waiting. What should happen?
Correct Answer
B) Rework, recompact and retest before the next lift
Hold the next lift, identify the cause, rework and recompact as needed, then retest for acceptance. A waiting truck or firm-looking surface does not resolve a confirmed failure. Follow the project testing procedure; FHWA’s model QC plan illustrates investigation and corrective testing rather than arbitrary averaging with another location. Source: https://www.fhwa.dot.gov/construction/cpmi04b8.cfm
Why This Is the Correct Answer
Hold the next lift, identify the cause, rework and recompact as needed, then retest for acceptance. A waiting truck or firm-looking surface does not resolve a confirmed failure. Follow the project testing procedure; FHWA’s model QC plan illustrates investigation and corrective testing rather than arbitrary averaging with another location. Source: https://www.fhwa.dot.gov/construction/cpmi04b8.cfm
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