Underground Storage Tank (UST) Closures

Conducting an Environmental Site Assessment is a crucial part in understanding what has happened at a UST site. The Site Assessment provides answers to such questions as how far has the release traveled and what is the hydrogeology of the site.

An underground storage tank system (UST) is a tank and any underground piping connected to the tank that has at least 10 % of its combined volume underground. The federal UST regulations apply only to underground tanks and piping storing either petroleum or certain hazardous substances.

Underground Storage Tank services include:

• Sampling
• Testing
• Closure Reports
• Initial Site Characterization
• Risk Assessments

The greatest potential hazard from a leaking UST is that the petroleum or other hazardous substance can seep into the soil and contaminate groundwater, the source of drinking water for nearly half of all Americans. A leaking UST can present other health and environmental risks, including the potential for fire and explosion.