When multiple areas of contamination are identified, how many samples are required for each area?

In the context of contamination assessment, having one sample per area of contamination is appropriate for a preliminary evaluation. Collecting a single sample helps establish whether contamination exists and allows for initial screening of the contaminants involved. This approach is often conducted when trying to ascertain the extent of the contamination and understanding if further investigation is warranted.

This option aligns with standard practices in environmental assessments, which typically begin with a smaller number of samples to confirm contamination before deciding on more extensive sampling. In many cases, if a single sample detects contaminants, further sampling may then be needed to fully characterize the extent and levels of contamination.

The other options suggest taking more samples than necessary for an initial assessment or imply that no sampling is required, which doesn't align with the standard procedural approaches adopted for evaluating environmental contamination effectively.