Here’s a short video Jack took the other day at about mile 86 of the Dalton. The truck got too close to the edge when it met another truck and went off the side and rolled over. A tree trunk punctured the tanker and according to the Alaska Department of Environmental Conservation about 3,000 gallons of ultra low sulfur diesel spilled onto the ground. Here is a link to the local newspaper’s article about it.
Jack carries approximately 9,200 gallons in the tanker he uses. Other tankers are larger or smaller. All or most tankers have different compartments though so when one has a spill most likely it’s only that compartment that empties. Having different compartments enables truckers to carry different types of liquids and/or put weight at different places in the load.
(YouTube has a bad habit of giving you the lowest resolution so if you want to see more detail try clicking one of the HD choices under settings in the lower right hand corner of the video screen.)