On February 2, 2011, Employees #1 and #2 were working for a petroleum and petroleum product company. Employee #1 was on top of a transport tanker into which the vice-president of the firm was transferring #1 diesel fuel, mixing it with about 1,000 gallons (3,785 liters) of #2 diesel fuel. Employee #2 was on the ground. After “splash filling” the center tank with about 300 gallons (1,136 liters) of #1 diesel fuel, the firm’s vice-president attempted to transfer the remainder of the #1 diesel to the truck’s front tank. He was going to do this task through “switch loading.”