What Is BTEX?

BTEX is an abbreviation formed from the first letters of Benzene, Toluene, Ethylbenzene, and Xylene. These compounds are aromatic hydrocarbons that belong to a group of volatile organic compounds, or VOCs, and are commonly associated with petroleum-based fuels.

BTEX compounds are toxic and can have harmful effects on the human body when exposure occurs at high concentrations or over a long period of time. Some of these compounds can affect the central nervous system, and benzene is also well known as a carcinogen.

BTEX may be found in crude oil, gasoline, diesel fuel, and other petroleum-based products. It can be released into the environment during the production, refining, storage, transportation, and use of petroleum and natural gas. Major sources of BTEX contamination include underground storage tanks, or USTs, aboveground storage tanks, or ASTs, gas stations, and petroleum and natural gas production sites.

One of the main concerns with BTEX contamination is its impact on soil and groundwater. These compounds can move underground through leaking storage tanks or fuel spills, and once they enter soil and groundwater, investigation and remediation can require a significant amount of time and cost.