37 Street cleaning; exterior cleaning of buildings; interior cleaning of buildings; cleaning and repair of boilers; cleaning of articles of clothing; cleaning of vehicles; cleaning of windows; cleaning of petrol, oil and grease deposits; cleaning of cesspits; pipeline and sewer cleaning; gully cleaning; industrial cleaning, namely, cleaning of industrial premises, industrial vacuum cleaning services, oil and gas industrial machine cleaning services; rental of cleaning machinery; chemical cleaning namely, dry cleaning; construction of environmental facilities; repair work, namely, repairs on buildings, machinery, vehicles, electrical devices, air conditioning units and IT equipment; installation of environmental facilities; construction and repair of environmental facilities, namely, refuse disposal facilities, waste disposal, waste water treatment, purification, incineration and drainage facilities as well as glass reprocessing facilities; cleaning of portable toilet cabins, portable toilet blocks and containers as well as removal of sewage stored in containers in connection therewith; trash collection in the nature of refuse clean-up; waste disposal for others, namely, removal of domestic, trade and industrial waste materials and removal of industrial liquid waste; removal of excrement; removal of oils and oily materials; hazardous waste disposal services in the nature of removal of environmentally hazardous liquids and removal of environmentally hazardous solid materials; construction consultancy; construction planning; general building contractor services and/or general contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, building and framing contractor services; construction planning for waste disposal and waste water treatment facilities; air duct cleaning