Specifications include, but are not limited to: Multiple companies provide all labor, supervision, equipment, services and expertise to perform preventive maintenance tree removals in the City of Cincinnati as specified herein. Since this work is of a potentially dangerous nature, it is to be performed by a contractor which earns a majority of its annual revenue by performing tree service work, and which shall be qualified by reference and past experience showing that its employees are highly trained and skilled in all phases of arboricultural work including that around energized conductors. This work includes, but is not limited to the following: Removal of street trees in preventive maintenance neighborhoods that contain 20 or more tree removals. Removal, pruning or cleanup of privately owned trees posing a hazard or nuisance to a street. Hauling logs or large trunks.