Environment: Work outside and inside, on slippery or uneven walking surfaces; frequent exposure to extreme hot and cold temperatures, dust, toxic chemicals and fumes, noise, vibration, and electrical hazards; work around gas lines; work around machinery with moving parts; may work in tight or enclosed spaces; may work alone; regularly work irregular hours; occasional prolonged hours; frequent district-wide travel. Motion: Frequent walking, climbing stairs/ladders/scaffolding, grasping/squeezing, wrist flexion/extension, and overhead reaching; frequent driving.