Environmental services. Tree-maintenance services. Environmental services; tree-maintenance services. Within each Contract Area, for the Term Contract for Environmental Maintenance 2015 works may include but not be limited to the following which are provided by the way of example: 1. Maintaining grass areas in adopted urban and rural locations. 2. Controlling weed growth in adopted areas. 3. Cleaning and jetting of the road drainage system. 4. Cutting or removing trees and hedges in urban and rural locations. Many of the work activities to be carried out under the Contracts will require the Successful Economic Operator to employ and use skilled personnel and specialist equipment and resources associated with such work activities. Such work activities shall include but not be limited to the following, which are provided by way of examples: 1. Maintaining grass areas using tractor/mowers 2. Maintaining grass areas using small motorised units/strimmers 3. Cleaning of road and footpath gullies 4. Jetting of drainage systems and inspection chambers 5. Weed Control to adopted areas 6. Emergency Responses (Grass Cutting/Gully Cleaning) 7. Traffic Management on Roads as defined in the Roads (NI) Order 1993. 8. Cut or remove trees and hedges and associated works.