Perform physical activities such as twisting, stooping, bending, squatting, kneeling, crawling, climbing ladders and stairs, walking on uneven ground, working on scaffolds above ground, and in ditches below ground. You may be exposed to noise, dampness, heat, cold, dust, fumes (occasionally, but always well-ventilated), chemicals (will work with, but normally won’t work in a chemical environment) and confined spaces (on occasion).