All roles may entail, to varying extents, the following physical demands: Long periods (potentially exceeding 8 hours per day) of walking, standing, sitting, bending, pushing, pulling, climbing, lifting, balancing, stooping, twisting, squatting, handling materials, repetitive hand-wrist motions, and traversing uneven surfaces; Exposure to both extreme heat and cold; Exposure to loud noises, fumes, and airborne particles; In addition to the above demands inherent in every role, the following roles may entail unique physical demands, including: Operators/Drivers may work inside or outside vehicles and may operate vehicles for over 8 hours per day. Regularly performs physical activities that require considerable use of the arms, hands, and legs and moving the whole body, such as walking, standing, lifting, climbing, bending, and handling materials; often exposed to loud noise, fumes, or airborne particles, toxic or caustic chemicals in a ventilated maintenance shop.