Businesses classed as carrying out other cleaning activities provide cleaning services that do not fit neatly into standard categories such as general building or domestic cleaning. Work may include cleaning vehicles and transport interiors, street and public-area cleaning, swimming pool cleaning, and specialist cleaning of equipment or premises. Some providers undertake one-off or periodic work, while others arrange regular maintenance schedules. The exact service depends on the business. Customers may be able to request tasks such as removing built-up dirt, washing surfaces, clearing debris or carrying out deep cleans in settings where ordinary cleaning methods are unsuitable. Providers may supply their own cleaning materials and equipment, and can work for households, businesses, public bodies or property managers. Activities involving specialist hazards or regulated waste may require specific training, procedures or authorisations.