What technique finds extent and intensity of radiological contamination?

• A. Grid.
• B. Nearside-Farside.
• C. Course Leg.
• D. Boundary of contamination.

Answer: (C)

Mapping radiological contamination is about collecting spatially resolved readings as you move through the area. The course-leg approach does this by defining a route made of successive straight legs and taking detector readings along each leg. As you complete multiple legs, you create a grid of data that shows where readings are high or low. This lets you see both how far the contamination extends and how intense it is in different parts of the area. It’s efficient for rapidly characterizing a site and directly yields information to delineate the contaminated boundary and quantify varying levels across the surveyed lines. Other techniques may focus on simply marking boundaries or estimating depth, but the course-leg method provides the integrated, line-based sampling that reveals the full extent and distribution of contamination.