Physical tasks may include walking on uneven and unpaved surfaces, bending, stooping, kneeling, reaching, pushing, and pulling, obtaining samples, setting up equipment and the ability to lift, carry, push, and pull materials and objects weighing up to 100 pounds. Physical tasks may include walking on uneven and unpaved surfaces, bending, stooping, kneeling, reaching, pushing, and pulling, obtaining samples, setting up equipment and the ability to lift, carry, push, and pull materials and objects weighing up to 100 pounds.