Dig holes, trenches, and other excavations; shoveling materials and leveling areas, cleaning out sewers and catch basins, loading and unloading supplies, moving furniture, cleaning litter and debris from streets, runways, parking lots, assisting in placing and holding heavy items in place, mowing grass using hand or powered equipment, trimming shrubs and lower parts of trees along sidewalks and highways, removing snow and ice using manual or small powered equipment; spreading sand on icy areas, performing laboring duties for skilled craftsmen but not as a Helper for Apprentice nor for the purpose of learning the trade. Loads and unloads trucks, picks up and hauls materials, transports personnel, plows and sands sidewalks, greases, oils and cleans motor equipment, changes the tires and performs minor maintenance.