The slick discovered in the waters off Postville, Labrador earlier this week continues to dissipate.

That’s according to the Canadian Coast Guard which is in the area with its Environmental Response Team.

A recent surveillance flight showed approximately 350 litres of pollution remaining on the surface of the water.

Officials say the continued reduction in the size of the sheen indicates a light product that evaporates and disperses relatively quickly—such as diesel.

Samples of the product have been collected, and booms have been placed at strategic points to contain the pollution and recover any residual product.

Transport Canada and the federal department of Environment and Climate Change are continuing their investigation into the cause of the spill.

Residents started noticing a strong smell and a sheen on the water around the time of a fuel delivery to the community. Officials have not yet identified the source of the pollution.