A common description of ash basin concerns includes which of the following?

• A. The typical problems include dissolved metals and fly ash
• B. The primary concerns are odor control and noise
• C. The sole issue is sediment color
• D. The main concern is dissolved oxygen depletion

Answer: (A)

Ash basins raise environmental concerns mainly because water that contacts the ash can dissolve metals, releasing them into groundwater or surface water, and because a lot of fine particulate matter—fly ash—remains in the basin. The dissolved metals pose toxicity and regulatory risks, while fly ash represents a solid waste that can become a source of contamination if it is mobilized or not properly contained. Odor, noise, or just sediment color aren’t the primary issues for these basins, and while dissolved oxygen depletion can occur in some water bodies, it does not describe the dominant challenges of ash basins. So the description that best fits is the combination of dissolved metals and fly ash.