Supervising and participating in activities such as: Sweeping, washing, polishing, and vacuuming as required for the care of floors (concrete, asphalt tile, linoleum, vinyl tile, cork, terrazzo, marble, wooden, tile, carpet), including the use of detergents, sawdust, mops, pails, and brooms; the use and care of cleaning equipment (vacuum cleaners, waxing and polishing machines, and carpet cleaners). Supervising and participating in the activities required for the care and maintenance of the grounds adjacent to the building, such as the cutting of grass, the planting of grass and flower seeds, and the trimming of shrubbery (using power lawn mowers, hand mowers, and garden tools), the shoveling of snow and the keeping of walks clear of ice during the winter, and the keeping of the grounds free of debris.