For indefinite periods of time - mobility within a field environment; exposure to mechanical, dust/mites, fume, and odor hazards; exposure to extreme cold, heat, and constant noise; walking; twisting body; stooping; standing; squatting; sorting; sitting; seeing; pushing, dragging and pulling up to 50 pounds; lifting and carrying up to 40 pounds; kneeling; climbing; reading; decision making; reaching above shoulder level; using both hands for simple and firm grasping; clarity of hearing; communicating clearly and effectively, in person and by two-way radio; fine finger manipulation; safe operation of shovel, pitch fork, rack, and chain saw; operating a trash truck through city traffic. Employees in this class normally work under close supervision performing a group of repetitive or closely related duties according to established procedures.