Elevated levels of toxic emissions found this spring near gas drilling equipment at two locations in the Fort Worth area were likely due to equipment problems that have been fixed, according to state officials.
The Texas Commission on Environmental Quality released results Monday of air testing performed June 3 and 4 that showed that toxic levels in the air near the sites decreased, according to agency officials.
The June tests followed April results that found higher-than-normal levels of benzene near two compressor stations: one run by Chesapeake Energy near East Berry Street and Yuma Avenue, and another operated by EnCana Oil and Gas at Interstate 20 and Markum Ranch Road.
Before the June tests, Chesapeake and EnCana replaced equipment at their compressor stations that they believed caused the elevated readings, said John Sadlier, the agency's deputy director.
"Both companies took steps," Sadlier said. "Sure enough, we're right back down to a base level."
One of the June tests at the Chesapeake facility found benzene at a level of 1.4 parts per billion by volume, which is the state's long-term screening level. Sadlier said officials usually worry only about levels above 1.4 parts per billion. The agency plans to install long-term air testing monitors at the facility.
"This is the second time we've had issues, minor that they are," with
this station, Sadlier said.
John Satterfield, Chesapeake's
director of environmental science, said the company's sites are all
operating in compliance with regulations.
"If for some reason we
again have some sort of faulty equipment or something's not operating
correctly, we'll fix it immediately," Satterfield said.
The next
highest reading for benzene, which is known to cause cancer in humans,
was found at the EnCana site. The level was 0.72 parts per billion by
volume.
Sadlier stressed that long-term screening levels are the
amount of a toxin that may cause health problems if someone were exposed
for 24 hours a day for 70 years.
Read the full story from today's Star-Telegram here.
To read the commission's June air test results for the Fort Worth area, go to bit.ly/JuneAirTests. (Warning: It's a pdf.)