Job conditions require standing, walking, sitting, twisting, stooping, crouching, kneeling, talking or hearing, making visual inspections, making precise hand and finger movements, reaching or grasping, lifting and/or carrying up to 50 lbs., pushing and/or pulling up to 50 lbs., and perceiving color differences. Work environments may include petroleum refineries, warehouses/plants, outdoor locations, and driving environments, including but not limited to areas involving chemicals, pressure vessels, tanks, and rotating equipment.