SC Water And Sewer Lines Practice Questions - South Carolina Water And Sewer Lines Contractor Examination Exam

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If flowable fill will be used over a polyethylene-encased ductile-iron main, what does DIPRA recommend above the pipe before the flowable fill is placed?

Place the flowable fill directly on the polyethylene Place approximately 12 inches of select backfill above the pipe, then place the flowable fill Remove the polyethylene so the flowable fill can bond to the iron Flood the trench and pour the flowable fill into standing water

Correct Answer:

Place approximately 12 inches of select backfill above the pipe, then place the flowable fill

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