31 00 00 Earthwork
	31 23 00 Excavation and Fill
	31 23 33 Trenching and Backfilling to supply underground utility water to sprinkler riser

Division 31 Section 23 00 Trench & Backfill to supply underground utility water to sprinkler riser

Earthwork involves the processes of excavation, leveling, compacting,
 backfilling and grading. Also included is demolition and removal of on-grade
 or below-grade obstructions and disposal of surplus earth and debris.