Why should groundwater from leaking gasoline tank cleanup projects be treated before discharge?

Treating groundwater from leaking gasoline tank cleanup projects before discharge is important primarily to prevent groundwater contamination. The contaminated water can contain harmful substances like hydrocarbons, which, if released untreated, pose significant risks to the environment and public health.

When contaminated groundwater is not treated properly, it can leach into surrounding soil and other water sources, leading to broader environmental issues. The treatment process helps to remove these toxic components, ensuring that the discharged water meets safety and quality standards before it is released back into the environment. This is crucial for protecting ecosystems and maintaining safe drinking water supplies for communities nearby.

In this context, while saving hydraulic capacity in the sewer and complying with regulations are relevant considerations, the foremost motivation for treating this groundwater is to safeguard against further contamination. Thus, the focus should be on ensuring that water is clean and safe, reinforcing the importance of environmental protection.