Mercury levels have risen to 16 times the regional "background" levels in an area around oilsands developments in northeastern Alberta, according to Environment Canada researchers.

Environment Canada researcher Jane Kirk, who presented the as-yet unpublished report at a Society of Environmental Toxicology and Chemistry (SETAC) conference in Nashville last November, told Postmedia News the affected area encompasses 19,000 square kilometres around oilsands operations.

Margaret Munro of Postmedia News reports that Kirk told the conference the area is "currently impacted by airborne Hg (mercury) emissions originating from oilsands developments."

The mercury levels fall off gradually with increasing distance from the oilsands "like a bull's eye," said co-researcher Derek Muir, head of Environment Canada's ecosystem contaminants dynamics section. The highest mercury loadings, which reached up to 1,000 nanograms per square metre, were found in the "middle of the bull's eye," covering around 10 percent of the impacted area.

In October, Environment Minister Leona Aglukkaq signed a global treaty pledging to decrease mercury emissions.

The federal researchers stressed that the findings were still lower than mercury levels found in southern Ontario and southern Quebec, where toxins from incinerators and coal-burning power plants are affecting the environment.

But the scientists said that mercury is "the number one concern" when looking at toxins released by oilsands production, with "indications that the toxin is building up in some of the region's wildlife." The contamination is further worrying to environmental groups and First Nations concerned about the oilsands' impact on fishing, hunting and wildlife.

Environment Canada wildlife scientist Craig Herbert told the toxicology conference that the eggs of several species of waterbirds downstream of the oilsands have been showing increasing levels of mercury, with levels found in the majority of Caspian Tern eggs in 2012 exceeding "the lower toxicity threshold."

Kirk's team measured contaminants in cores of the snowpack collected from over 100 sites near the oilsands every March, to calculate how much pollution enters the ecosystem at spring melt after gathering in snow over winter.

The team's 2011 results confirmed that "aerial loadings" of 13 priority pollutant elements including mercury were 13 to 15 times higher at sites within 50 km of the upgraders that convert bitumen into synthetic crude oil, and "highest within 10 km of the upgraders," according to the presentation abstract.

The results "support earlier findings that the bitumen upgraders and local Oil Sands development are sources of airborne emissions to the Alberta Oil Sands Region."

The researchers also found up to 19 nanograms of methyl mercury per square metre near oilsands sites, which is 16 times the region's background level. Postmedia News reports that this is the first finding of this more toxic form of mercury in snow. The finding is significant because, as the abstract explains, "methyl mercury is a neurotoxin that bioaccumulates through foodwebs."

"Here we have a direct source of methyl mercury being emitted in this region and deposited to the landscapes and water bodies," Kirk told Postmedia News. "So come snowmelt that methyl mercury is now going to enter lakes and rivers where potentially it could be taken up directly by organisms and then bioaccumulated and biomagnified though food webs."

Muir said that microbes in the snow could be converting mercury into methyl mercury, or that it could be coming from "dust and land disturbances," though there is currently no data to support this.

"To our knowledge, emissions data from blowing dusts due to various landscape disturbances (open pit mines, exposed coke piles, new roads, etc.) and volatilization from tailing ponds are not publicly available," the researchers said.

The research shows that zinc, nickel and vanadium levels in lake sediments peaked in the 1990s following oilsands development, but have fallen off since, which Kirk attributes to "improvements in the air pollution catcher technology at the upgraders."

But levels of mercury and other "crustal elements" in lake sediments have been "going up more or less continually" with the expansion of the oilsands, said Muir, with open pit mines and coke piles possibly contributing to the pollution.

The fact remains that more research is required on why mercury levels are going up and the impact it's having on ecosystems.

"Is it affecting fish levels and is it going to result in increasing fish consumption advisories? We don't know," said Kirk.

But Environment Canada's latest results only confirm the need to further study and address the serious impacts of oilsands development.

Image Credit: Elias Schewel / Flickr

The Narwhal’s reporters are telling environment stories you won’t read about anywhere else. Stay in the loop by signing up for our free weekly dose of independent journalism.

Today federal scientists from Environment Canada presented research at an international toxicology conference in the U.S. that indicates contaminants from the Alberta tar sands are polluting the landscape on a scale much larger than previously thought.

A team lead by federal scientist Jane Kirk discovered contaminants in lakes as far as 100 kilometers away from tar sands operations. The federal research confirms and expands upon the hotly contested findings of aquatic scientist David Schindler who, in 2010, found pollution from the tar sands accumulating on the landscape up to 50 kilometers away.

"That means the footprint is four times bigger than we found," Schindler told Postmedia News.

Senior scientist Derek Muir, who presented some of the findings at Wednesday's conference, said the contaminated region is "potentially larger than we might have anticipated." The 'legacy' of chemicals in lake sediment gives evidence that tar sands pollution has been traveling long distances for decades. Samples show the build up of polycyclic aromatic hydrocarbons, or PAHs, known to cause cancer in humans and to be toxic to aquatic animals, in 6 remote and undisturbed lakes up to 100 kilometers away from tar sands operations.

The pollutants are "petrogenic" in nature, meaning they are petroleum derived, and have steadily and dramatically increased since the 1970s, showing the contaminant levels "seem to parallel the development of the oilsands industry," Muir said.

After the release of Schindler's groundbreaking research on tar sands pollution in 2010 the Alberta government claimed the contaminants were naturally occurring and posed no risk to aquatic life.

However at today's conference, the annual meeting of the North American Society of Environmental Toxicology and Chemistry, Kirk discussed the long list of 'priority pollutants' that accumulate in the region's snow. Within 50 kilometers of the tar sands, snowpack contains numerous contaminants including dangerous neurotoxins, such as methyl mercury, that bioaccumulate in food webs. Kirk found priority pollutants in the air were 1.5 to 13 times higher at test sites within 50 kilometers of tar sands refineries, and highest within 10 kilometers.

Abstracts for Kirk, Parrott and Muir's presentations can be found on pages 103 and 104 of the conference programme (pdf).

"We don't really know the fate of the various metals including mercury as they go from snow, to melt water to run-off and then into the aquatic environment," Muir told Postmedia.

The toxicity of melt water from snow falling in the tar sands region was researched by federal scientist Joanne Parrott, who also presented at the conference. Studying snow samples taken in 2011 and 2012 along the Athabasca River, Parrott found that the melt water was toxic to minnow larvae, even when diluted down to 25 percent. "The larval fish don't do very well in that snow at all," she said.

Parrott suggests melt water, once mixed with water from the Athabasca River, will no longer be toxic to minnows.

Snow melt, however, provides a significant amount of water to tributaries where fish hatch in the spring, says Schindler. "My big concern is that slowly because of mortalities at spring melt, that this will erode the fishery, killing off the embryos," he told Postmedia, pointing to the abnormally low numbers of fish in the Muskeg River as a possible occurrence.

Parrott plans to expand her research to consider whether young fish in tributaries that feed the Athabasca River are affected by the pollution.

Schindler's research has already highlighted the increasing incidence of fish deformity in areas downstream of tar sands operations, like Lake Athabasca. "I think what could happen is that the few embryos that manage to survive, deformed as they are, struggle down to Lake Athabasca," he said, adding the fish look "so horrible" the First Nations who depend on them for survival will not eat them, even if they don't have confirmed high levels of contaminants.

"I think that's fair enough, they wouldn't sell in Safeway," Schindler commented.

The scientists' presence at the conference is significant given the Harper government's strict control of scientific communications surrounding the tar sands. Federal scientists were prevented from speaking with the media at the same conference in Boston last year.

An internal document uncovered by Postmedia instructed federal scientists to avoid answering media questions, saying "if scientists are approached for interviews at the conference, the EC communications policy will be followed by referring the journalist to the media relations…phone number. An appropriate spokesperson will then be identified depending on journalist questions."

After Postmedia's Mike De Souza released the internal document last week, Environment Canada made arrangements for the news agency to speak with both Muir and Parrott.

Postmedia's Margaret Munro explains: "Environment Canada earlier this month said scientists were not available to comment on their findings of contamination around the oilsands. The department’s media office arranged this week’s interviews with Muir and Parrott after Postmedia News obtained details of the reports the scientists will present at the U.S. conference on Wednesday."

As DeSmog covered in an earlier post, the Harper government's heavy-handed treatment of federal scientists led to a mass demonstration this summer, where scientists and academics mourned the "Death of Evidence," claiming "Stephen Harper Hates Science." 

The government's strict communications policy is seen by some as an attempt to silence critics voicing science-based opposition to development of the tar sands.

The Narwhal’s reporters are telling environment stories you won’t read about anywhere else. Stay in the loop by signing up for our free weekly dose of independent journalism.

The Canadian government is working hard behind the scenes to cover up the negative effects that tar sands extraction is having on the local environment, wildlife, communities and the global climate. According to Access to Information documents obtained by Postmedia's Mike De Souza, the Stephen Harper government has actively suppressed the release of vital information regarding the spread of tar sands contamination by muzzling federal scientists.

The gag order, according to De Souza, came on the heels of a newly researched government report in November 2011 which confirmed the findings of University of Alberta scientists Erin N. Kelly and David Schindler. The scientists discovered concentrations of toxics such as heavy metals were higher near tar sands operations, showing a positive correlation between tar sands activity and the spread of contaminants in the local environment.

The government of Canada and the government of Alberta denied the correlation, saying local waterways tested showed no signs of toxic contamination and reports of mutated and cancerous fish downstream from the tar sands were unfounded.

The document uncovered by De Souza shows that federal scientists who could confirm the University of Alberta results were restricted from speaking to the media: "If scientists are approached for interviews at the conference, the [Environment Canada] communications policy will be followed by referring the journalist to the media relations…phone number. An appropriate spokesperson will then be identified depending on journalist questions."

Federal scientists were also given a list of scripted responses, explaining government tests in the spring of 2010 showed no toxics in the Athabasca River and established no links between contaminants and abnormal and sick fish.

Scientists were also directed to avoid questions regarding environmental monitoring of the tar sands and the role Environment Canada plays in the region with this scripted line: "I am a scientist. I'm not in a position to answer that question but I'd be happy to refer you to an appropriate spokesperson."

David Schindler, co-author of the 2010 University of Alberta study commented, "it is a good study, and [the author] is a very fine young scientist, who should be trusted to comment on her own results."

"Similarly, Derek Muir, her supervisor and co-author, is one of the world's top contamination experts, and Canadians should be ashamed that he cannot discuss results directly with the public, but must go through an official spokesperson."

In 2010, the results of Kelly and Schindler's contaminant analysis caused an uproar in Alberta and federal governments. Eager to promote expansion in the tar sands, the Canadian government failed to install a sound and independent monitoring system for the region.

Any data used to support the government's official position, that no contamination had occurred, was supplied by the oil and gas industry.

Schindler conducted a basic analysis of waterways in the region, sampling water both upstream from tar sands operations, and downstream. What Schindler and his team discovered was a considerable accumulation of pollutants in water downstream from tar sands development which includes open-pit mining and refining.

Most notably, Schindler discovered that airborne pollutants were being deposited on land, far from contaminated waterways like the Athabasca River. It was Schindler who first recognized the role snow was playing in the transportation and depositing of tar sands pollution.

These land-based pollutants mirrored contamination of waterways. Schindler found that "embryos of fish exposed to oilsands' water and sediment have very high rates of mortality, and among the survivors, there are very high rates of deformities."

His research confirmed the concerns of local communities, First Nations and environmental groups that the fast-tracking of tar sands expansion without careful monitoring was having negative effects on the environment and those living downstream.

The findings also contradicted research conducted by the industry/government group Regional Aquatics Monitoring Program (RAMP), a group Schindler claims "violated every rule" of long-term study.

In perhaps one of Canada's most scandalous moments in recent history, Dr. Schindler was publicly discredited by the provincial and federal government. His research and his credibility were called into question when the Alberta government went on record to say his study – which was published in the prestigious Proceedings of the National Academy of Sciences – was biased and that contaminants in the region's watershed occur naturally and not as a result of industrial activities.

The treatment Schindler received as a result of his research concerned scientists across Canada, many of whom felt the federal government was conduction a 'witch hunt' to silence information that might fuel opposition to the tar sands.

Schindler's experience was just one of many reasons why scientists from across Canada held a mock memorial this summer on Parliament Hill, mourning the "Death of Evidence," caused by the muzzling of scientists by the federal government.

The motto of the event was clear: "Stephen Harper Hates Science."

To this day no clear environmental monitoring program is in place to track and analyze the effects that tar sands extraction and refining has on the local environment. Last month the Alberta government announced the creation of a new scientific body to monitor the impacts of development, which Diana McQueen, the province's Environment Minister, suggests will be 'credible' and operate at an 'arms-length' from industry and government. The plan, however, has yet to take any real shape.

"This is yet another plan to develop a plan," said Greenpeace energy and climate campaigner Mike Hudema. "There is still no funding commitment and no clear governance model to ensure independence. The province should stop approving new projects based on flawed data and incomplete information until this gets sorted out."

Image credit: Jodi Stark

The Narwhal’s reporters are telling environment stories you won’t read about anywhere else. Stay in the loop by signing up for our free weekly dose of independent journalism.