Which describes groundwater contamination plumes and how they are delineated?

Which describes groundwater contamination plumes and how they are delineated?

• A. Contaminants travel in random pockets with no defined pattern.
• B. Delineation relies on surface water sampling only.
• C. Delineation uses only chemical analysis of a single well.
• D. Contaminants travel from a source forming a plume in the aquifer; delineation uses monitoring wells, hydraulic tests, groundwater modeling, and tracer tests to define extent and rate.

Answer: (D)