From The Greeley Tribune (John Aguilar):
A federal appeals court ruled Friday that an emissions-heavy section of northern Weld County that’s currently excluded from limits on air pollution imposed on the Denver metro area should be counted, potentially ratcheting up pressure on the oil and gas industry to operate more cleanly or cut output.
The U.S. Court of Appeals for the District of Columbia Circuit determined that the Environmental Protection Agency incorrectly left a swath of Weld County abutting the Wyoming state line out of the nine-county “nonattainment” area that centers on Denver, meaning emissions from hundreds of oil and gas wells in that part of the county could soon be added to the metro area for air pollution measurement purposes.
Robert Ukeiley, senior attorney for the Center for Biological Diversity, said the ruling effectively means that Weld County energy operations near the Wyoming border will have to “comply with the more protective standard” that the metro area is under in terms of their emissions output.
“Oil and gas, including in northern Weld County, is responsible for our smog problem, and the court told the EPA enough is enough,” Ukeiley said. “You have to get (the industry) to reduce their pollution.”
The ruling from the appeals court sends the matter back to the EPA for further consideration. The lawsuit against the EPA was brought by the Center for Biological Diversity, the Sierra Club, the National Parks Conservation Association and the Boulder County Board of Commissioners.
Heat and sunlight bake pollutants, including some of the chemicals emitted by oil and gas operations, to form ozone, or smog. For more than 15 years, Colorado has flunked federal air quality health standards with ozone air pollution exceeding a decade-old federal limit of 75 parts per billion, which was tightened to 70 parts per billion under President Barack Obama.
The World Health Organization recommends no more than 50 parts per billion to protect human health.
The U.S. threshold has placed much of the metro area and areas immediately around it in “nonattainment” status when it comes to meeting the requirements of the Clean Air Act. The EPA in December reclassified Colorado as a “serious” violator of federal air quality laws, forcing stricter state efforts to reduce air pollution…
Friday’s ruling revolved around two primary issues: Weld County’s outsized role in oil and gas production in Colorado — the county has nearly half of the state’s more than 50,000 active wells — and a finding that EPA had erroneously cited a topographical feature, Cheyenne Ridge, as a reason for excluding the northern section of the county from the nonattainment area.
EPA, the court wrote, claimed that the ridge effectively acted as a blockade to emissions emanating from the northern reaches of Weld County. The problem is, Cheyenne Ridge is on the Colorado/Wyoming border, the court said, not further south, as EPA asserted.
“EPA literally moved mountains to try and cut oil and gas a break from having to reduce pollution,” Ukeiley said Friday.
The court also faulted EPA’s reasoning for excluding the northern portion of Weld County based on the federal agency’s conclusion that that section of the county only contributed a quarter of the nitrogen oxide and 18% of the volatile organic compounds that the county overall emits.
“Given that Weld County sources generate exceptionally high amounts of VOCs and NOx — mostly from oil and gas operations — the fact that northern Weld contributed only a quarter of those emissions does not support EPA’s decision not to consider them,” the court ruled.
The court determined that according to 2011 data, Weld County produced approximately six times as many VOCs as the next-highest county included in the Denver nonattainment area. And compared to the lowest-emitting county, Weld County produced about 60 times as many VOCs and 20 times more nitrogen oxide.