Final answer:
The two main concerns when using DI tanks are contamination, which affects water purity, and leakage, which can result in water loss and environmental pollution. These concerns outweigh the cost and transportation difficulties.
Step-by-step explanation:
The main concerns when using Deionization (DI) tanks are contamination of the tank which can lead to substances leaching into the water, thus compromising its purity, and leakage of the tank, which can result in the loss of water and potential environmental contamination. While factors like the high cost of the tanks and difficulty in transportation might be logistical concerns, they are not directly related to the function of maintaining water quality.
Contamination is particularly worrisome due to the possibility of introducing pollutants such as heavy metals, radioactive materials, or hazardous air pollutants such as benzene to the freshwater supply. Leakage is a critical concern since it can lead to a wastage of resources and can also allow contaminants from the surrounding environment to seep into the tank, further polluting the water.