A First Nation says it is concerned about two other leaks at an oil sands project in northeastern Alberta, bringing the total in recent months to six.
Chief Bernice Martial of Cold Lake First Nation said Monday that she is worried about the safety of drinking water, animals and vegetation in her region.
In July, Canadian Natural Resources Ltd. said a mechanical failure at an old well was behind ongoing bitumen seepage at its oil sands project on the Cold Lake Air Weapons Range.
About 1.5 million litres of bitumen has since been recovered from bush and muskeg in the area.
The band said in a news release that it recently learned of two additional leaks of bitumen, but the Alberta Energy Regulator says they both involved "produced" water back in May and June.
Spokeswoman Cara Tobin said the waste water from the two sites, about 8,000 litres in total, has since been cleaned up.
Clean-up of bitumen at the four other sites is ongoing, she said.
The last report posted by the regulator tallies dead wildlife from the leak at 2 beavers, 46 small mammals, 49 birds and 105 amphibians.
"Our future generations will not be able to enjoy what once was pristine Denesuline territory," Chief Martial said in a news release.
"Animals such as wolves and bears are now migrating through our community, which is a safety risk and precaution. The environment is changing and definitely not for the positive."
The company has been ordered to limit the amount of steam it pumps into the reservoir while the regulator investigates.
Gerry Protti, chairman of the regulator, said in a speech in Calgary that the spill has significantly affected the company's finances.
"We're working extremely hard to come up with the cause of the issue and resolution around it. But when you're taking 40,000-plus barrels of production out of their cash flow, that has a direct impact," he said Monday.
"But that shows the importance that the province is attaching to development occurring with the minimum environmental impact."
Officials with Calgary-based Canadian Natural Resources were not immediately available for comment.
Last month, company president Steve Laut said he didn't expect the ongoing spill would have a long-term impact on production.
He said he's confident the company can either repair problematic well bores or adjust its steaming strategy to work around them.