What risk is associated with improper installation of underground storage tanks?

The risk associated with improper installation of underground storage tanks primarily involves environmental damage. When USTs are not installed correctly, they can develop leaks or structural failures, which may lead to the release of hazardous substances such as gasoline, diesel, or other fuels into the surrounding soil and groundwater. This contamination poses serious risks not only to the local ecosystems but also to human health, as these pollutants can migrate and affect drinking water supplies. The environmental consequences can result in extensive remediation efforts, legal liabilities, and severe penalties, highlighting the critical importance of adhering to proper installation practices to prevent harm to the environment.

While the other options may have relevance in a broader operational context, they do not capture the immediate and significant impact that improper installation has on the environment, which remains the primary concern in UST installation.