Specifications include, but are not limited to: This request is for brush grinding to meet the specifications listed. It is the intent of the following specifications to describe on-site grinding services. Debris is routinely collected as a result of the public limb and woody-debris collection site owned by the City of Derby. Successful bidder shall provide all labor, supervision, materials and equipment, with operators, necessary for on-site grinding/mulching of natural (trees, brush, wood and vegetation) brush piles. Successful proposal will be required to separate all foreign material (wire, metal fence/posts, concrete, etc.) located within the brush piles from the natural materials prior to grinding. The City reserves the absolute right in its obligation to the public, to accept the proposal to serve the public interest.