User Manual

Appendix 39
SCFM: Standard cubic feet per minute (SCFM) Flow rate of air
corrected to “standardized” conditions of temperature and pressure.
Soft Excavation: Excavation by dry (compressed air) or hydro
(high-pressure water) in conjunction with a powerful vacuum.
Slurry: Semi-liquid mixture of soil particles suspended in water.
Spoil: Waste material including earth and rock uncovered during the
excavation process.
Subsurface Utility Engineering (SUE): Engineering process to identify
underground utility information needed for excavation plans, and for
acquiring and managing information during project development.
Supersonic Nozzle: High-efficiency, proprietary nozzle design and
technology unique to AirSpade.
Test Hole:Exposure of underground facilities to determine the
horizontal and vertical location.
Tolerance Zone:Space immediately surrounding a facility where special
care is taken.
Trenching: Method of digging a trench to install, maintain, or inspect
pipes, conduits, or cables underground.
Utility AirSpade: Pneumatic soil excavation tool with safety features
required by the utility and construction industries.
Vacuum Excavation:Means of soil extraction using a powerful vacuum.