Two employees were using a scissor lift to access and repair a damaged valve. The employees were approximately 12 feet above the floor. Employee 1 was using a pipe wrench to open the valve when the gasket failed. Hot, production fluid sprayed both employees in the lift, blocking access to the scissor lift controls. Employee 2 climbed over the rail and down the scissors to the ground. Employee 2 sustained first and second degree burns to the face and scalp, was treated and released. Employee 1 fell out of the lift and sustained multiple orbital fractures, a fractured sternum, a broken knee cap, and a laceration to the forehead. Employee 1 was hospitalized.