Two oil stains within eight days at Sand Creek near the Sankoa Energy Refinery have caused state health officials to worry that the 20-year-old underground clay wall containing toxic chemicals isn’t working. ing.
More than a year ago, the Colorado Department of Public Health and Environment ordered Sanko to replace a wall that stretched about 2,000 feet below about 30 feet parallel to Commerce City’s creek, records show. That mission came after a similar oil slick, And Suncor is set to begin designing wall modifications at the end of July.
“The refinery is in the final stages of planning to improve the boundary barrier system and is working with CDPHE on these plans. Work is expected to be completed in 2021 and will be more effective along Sand Creek. A barrier system will be built, “said Suncor spokeswoman Mita Adesanya in an email.
This is a sensitive moment for Suncor.Colorado officials Review Company application to update Outdated business license. Due to equipment failures and other failures at the refinery, 15 accidents occurred between March 27 and April 22 this year, and more than 100 failures occurred at the refinery in the last five years. , Air pollution has exceeded the permissible range. Since 2011, Colorado has settled at least 10 proceedings against Suncor.
A Sanko official said in an email on Friday that he was investigating the cause of the recent oil slick. On May 22 and May 31, Sand Creek’s public bike paths and green roads popular for fishing Occurred along.
Sanko and state officials do not expect permanent effects on creeks and wildlife, but “trends in groundwater data indicate that walls are less effective.” Was sent by director Jennifer Opira, according to a June 2 email received by The Denver Post, to local government officials in CDPHE’s Hazardous and Waste Management Department.
The cause of the May 22 spill has not been identified, Opila said in an email, but said it could have been due to a “May 20 power outage.” The refinery side of the wall, she said.
“It’s likely that groundwater levels have risen during this closure,” she wrote, and petrochemicals “flowed on and through walls,” she wrote. An emergency generator was installed to pump contaminated groundwater from the refinery side of the wall.
On May 31, a fuel leak at the refinery flowed down the road into an outdoor basin and then reached a stream, according to state officials. Suncor deployed three orange booms and vacuum trucks to clean them.
Along the green road on Thursday, fisherman Mike Medina threw a fishing line for carp in a Burlington irrigation ditch near the spill site…
According to state records, benzene levels at the time of the spill were as high as 3,900 ppb in refinery groundwater. This is more than the federal drinking water standard of 5 ppb. Colorado’s current water quality standards have been relaxed in industrial areas, allowing up to 5,300 ppb of benzene in Sand Creek.
Benzene levels found in pipes discharged to Sand Creek first soared beyond Sanko’s permit limits in the first week of June, but soon disappeared, according to state officials.