Environmental Factors: Performance of essential functions may require exposure to adverse environmental conditions, such as confined space, dirt, dust, pollen, odors, wetness, humidity, rain, fumes, temperature and noise extremes, operating machinery, vibrations, electric currents, traffic hazards or toxic agents. Physical Requirements: Physical Ability: Tasks require the regular and sustained performance of moderately physically demanding work, typically involving some combination of climbing and balancing, stooping, kneeling, crouching, and crawling, and that generally involves lifting, carrying, pushing, and/or pulling of moderately heavy objects and materials (20-50 pounds).