PERFORMANCE RESPONSIBILITIES: Keeps buildings and premises, including sidewalks, driveways, and play areas neat, clean, and free of litter at all times; Disinfects all water fountains, floors in the restrooms, commodes, urinals, and sinks every day; Washes all windows on both the inside and outside at least twice each year or more frequently if necessary; Performs ground keeping duties as assigned; Maintains all floors in a clean and attractive condition, including regular waxing, and in a good state of preservation; Secures all windows and doors, turn s off all lights (except emergency lights), and arm s any alarm systems at the end of each day; Regulates heat, ventilation, and air conditioning systems to provide a temperature appropriate to the season and to ensure economical usage of fuel, water, and electricity (Energy Program); Performs minor maintenance repairs. "Custodian I" means personnel employed to keep buildings clean and free of refuse; " Custodian II" means personnel employed as a watchman or groundsman; " Custodian III" means personnel employed to keep buildings clean and free of refuse, to operate the heating and cooling systems and to make minor repai rs; "Custodian IV" means personnel employed as head custodian.