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Utility location markers for a fire hydrant, a drinking water line and a natural gas line in Germany. In Germany, the colors used for temporary marking of underground utilities are not standardized like in other countries. However, permanent marker signs are used for utilities like hydrants, drinking water lines and natural gas lines.
Reflections from soil layering are also present (dashed lines). Ground-penetrating radar ( GPR ) is a geophysical method that uses radar pulses to image the subsurface. It is a non-intrusive method of surveying the sub-surface to investigate underground utilities such as concrete, asphalt, metals, pipes, cables or masonry. [ 1 ]
A cable locator or cable avoidance tool (CAT) is an instrument used for detecting the presence and approximate location of buried services in advance of undertaking excavation works. It aims to avoid accidents while excavating. [ 1 ]
The tool is tracked by the operator, who feels the tool pounding and can approximate its location underground. The operator also monitors the surface to ensure it remains undisturbed. As the tool nears the exit point, it is slowed down, and an exit pit is dug to locate both the tool and the bore.
A service line is a pipe that connects the water main to a building or home. The city provides water and services to about 6,500 customers, including those in the Village of West Lafayette.
A dowser, from an 18th-century French book about superstitions. Dowsing is a type of divination employed in attempts to locate ground water, buried metals or ores, gemstones, oil, claimed radiations (radiesthesia), [1] gravesites, [2] malign "earth vibrations" [3] and many other objects and materials without the use of a scientific apparatus.
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