Physical Abilities: Task require the regular and, at times, sustained performed of moderately physical demanding work, typically involving some combination of climbing and balancing, stooping, kneeling, crouching, and crawling, and that may involve the lifting, carrying, pushing, and/or pulling of moderately heavy objects and materials (50 pounds). Environmental Factors: Performance of essential functions may require exposure to adverse environmental conditions, such as dirt, dust, pollen, wetness, fumes, temperature and noise extremes, machinery, vibrations, electric currents, traffic hazards, toxic agents, or pathogenic substances.