Enbridge says crews have mopped up most of the oil that leaked from a pipeline at its Regina terminal.

“All the liquid product on the ground, as of early (Thursday) morning, has been completely cleaned up,” said Enbridge spokesperson Graham White.

“So, we’re just doing the finer points of surfaces, the pump station itself, the floors, that type of thing and we expect that to go on for several days yet.”

The energy company says an estimated 1,350 barrels of oil was released from the Line 4 pipeline at its pumping station in the city's industrial area Tuesday night.

There were no impacts to the public, wildlife or waterways, Enbridge said, and air monitoring showed concentrations were within safe limits.

White says the leak has been pinpointed to a failed valve flange, but the cause of the spill remains under investigation.