In the fall of 2018, a leak at a Pasadena oil refinery led to the release of thousands of pounds of toxic pollutants, including some 8,000 pounds of cancer-causing benzene.
During that nearly 67-day stretch, the Pasadena Refining System reported its highest two-week average concentration of benzene from one of its fence-line monitors — a level that was 6.5 times above a federal guideline for short-term exposure.
The Pasadena refinery is one of 10 across the country that exceeded the Environmental Protection Agency’s action level for benzene as of Sept. 30, according to an analysis released Thursday by the nonprofit Environmental Integrity Project. Six of them are in Texas, including three in the Houston area.
“Benzene is the most ubiquitous hazardous air pollutant Houston has to deal with, we are always watching it and very concerned about it,” said Loren Hopkins, chief environmental science officer for the Houston Health Department. “It’s a carcinogen. It’s also a precursor to ozone formation and so understanding where we can go in and work on reducing benzene emissions is real vital information.”
Communities that face long-term exposure to benzene from the top 10 companies — whose annual averages ranged from 10 to 49 micrograms per cubic meter — could see as many as four additional cancers per 10,000 people, the group said, based on estimates from the EPA.
“The numbers are high enough to be worrisome,” said Eric Schaeffer, executive director of the group, “and (state officials) ought to turn their attention now to what can be done to bring those emissions down.”