| 21. | This process creates a " backfill bias, " because better results are overrepresented in the database.
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| 22. | Over 90 % of the material in the building was recycled for other uses or as backfill.
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| 23. | This is when quarries put backfill in areas that have been dubbed unusable or abandoned for building.
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| 24. | At least 2 feet ( 0.6 m ) of clean backfill was placed over each excavation.
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| 25. | Excavated material was used to backfill the old river channels, so that loss of land was reduced.
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| 26. | The backfill blade is used for grading, leveling, backfilling, trenching, and general dozer work.
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| 27. | When the treated material is recycled as backfill, net costs are about $ 1 per cubic yard.
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| 28. | The walls are infilled with granular soil, with or without reinforcement, while retaining the backfill soil.
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| 29. | Basically, the pipe follows the soil movement or settlement of the backfill, as technicians call it.
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| 30. | Individual monitoring of each vacuum line does not necessarily require gauge lines, nor does inert gas backfill.
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