Nexen pipeline leak in Alberta spills 5 million litres. (5M litres is a bit more than 31K barrels, according to this site).
The only reporting I've found on this is at Canadian sites. It appears to be about 2 1/2 times the size of the Mayflower, Arkansas spill, but didn't impact human homes. Considering that it's apparently from oil sands, an emulsion of bitumen, water and sand, I have to wonder what supporters of the XL pipeline will say.
The spill covered an area of about 16,000 square metres
which is all of .006 square miles, a fortuituously small area compared to the area affected by underwater gushers or wrecked oil tankers.
This may seem relatively minor to us USans, not so for Canadians:
One of the largest leaks in Alberta history has spilled about five million litres of emulsion from a Nexen Energy pipeline at the company's Long Lake oilsands facility south of Fort McMurray.
(emphasis added).
With repeated stories in the U.S. of derailed and exploding oil trains, I think it's important to recognize that pipelines aren't exactly safe, either.