If it rusts long and badly enough, the metal disappears and you're left with a pile of brownish-red powder-rust or iron oxide, which has the same composition as iron ore. Here's why. Iron atoms want to return to their normal state as iron ore, iron oxide, or rust.
Head Custodian Tasks. 1  Meet with management to analyze costs of various facility needs and establish maintenance priorities. 2  Train new employees to ensure safety, cleanliness and efficiency. 3  Oversee all tasks within the custodial department, including cleaning, services, supplies and equipment maintenance.
Function. A night custodian cleans the office or building at night by emptying all trash receptacles, vacuuming carpets, mopping floors and dusting furniture. In restrooms a night custodian clean fixtures, mirrors, dispensers, door handles and light switches.