This class includes the collection of solid and non-solid hazardous waste, i.e. explosive, oxidizing, flammable, toxic, irritant, carcinogenic, corrosive, infectious and other substances and preparations harmful for human health and environment. It may also entail identification, treatment, packaging and labeling of waste for the purposes of transport.

This class includes:
——collection of hazardous waste, such as: used oil from shipment or garages, bio-hazardous waste, used batteries
——operation of waste transfer stations for hazardous waste

This class excludes:
——remediation and clean up of contaminated buildings, mine sites, soil, ground water, e.g. asbestos removal, see 3900