Plains Midstream Canada has deployed a third boom at the Dickson Dam reservoir site as they continue to clean up the June 7 oil spill, which released between 1,000 and 3,000 barrels of light sour crude oil into the regional water system.

The spill was first believed to have originated from a leak in Jackson Creek. It was later determined that the leak actually came from a source under the Red Deer River.

Plains Midstream has yet to determine exactly how the leak happened. They are focusing more on four key parts of the clean up efforts, including containment and protection of wildlife.

They have also continued with regular testing of the affected water sources and have reported that quality levels remain within Alberta drinking water standards.

So far no contaminants have been found in the Red Deer River, which supplies Lacombe and the surrounding communities with their drinking water.

"We were able to limit the extent of the release to the river, and limit any other release from going.downstream," said Stephen Bart, vice-president of crude oil operations at Plains Midstream, at a press conference June 18.

There will be an information session for landowners affected by the spill, June 21 from 6 to 8 p.m. at the James River community hall. The session will allow time for questions from stakeholders.