Almost two weeks after a petroleum substance spill was discovered in southeast Yukon, the territorial government has still not released the exact nature of the substance.

Officials are evaluating the repair and remediation plan by EFLO Energy Yukon Ltd. after the fuel leak discovered at its facility on Aug. 7.

Rod Jacob, a Department of Energy, Mines and Resources (EMR) spokesman, confirmed this morning the company submitted the plan by last Friday’s deadline.

The spill from the non-operational Kotaneelee gas processing plant was initially reported by an Environment Yukon employee in the area to the territory’s spill hotline.

The leaked substance was described as an “unknown petroleum hydrocarbon.”

EFLO, a Houston-based company, was ordered by EMR to stop and contain the leak, fence off the affected area and begin the cleanup.

The repair and remediation plan was also ordered along with a subsequent report due Sept. 18 to confirm work has been done.

Jacob said the government is expecting continued compliance from EFLO on all orders.

He noted some site cleanup has been done and work is continuing as EMR officials continue to evaluate the plan.

Asked about the type and amount of petroleum leaked, Jacob said those details are still being determined.

The cost of the cleanup is also not known.

Samples were taken from the site, officials told reporters last week.

A photograph showed the leakage measuring 29 metres long by about two metres wide.

It’s unknown how deep the spill was, though in the area where samples were taken it was about 20 to 30 centimeters in depth.

There has not been evidence that the petroleum reached a small creek near the gas plant.

The gas plant, which was operational from 1978 to 2012, can only be accessed by air or barge. It is linked by pipeline to Fort Nelson, B.C.