During the term of the covered project, the contractor shall recycle or divert the required percentages of materials, and keep records thereof in tonnage or in other measurements approved by the building official that can be converted to tonnage. The building official will evaluate and monitor each project to gauge the percentage of materials recycled, salvaged and disposed from the project. The required diversion of a minimum of the required percentages of the demolition and construction debris will be measured separately with respect to the demolition segment and the construction segment of a project where both demolition and construction are involved. To the maximum extent feasible on-site separation of scrap wood and clean green waste in a designated debris box or boxes shall be arranged, in order to permit chipping and mulching for soil enhancement or land cover purposes. In order to protect chipping and grinding machinery, metal and other materials which cannot be chipped or ground shall not be placed in such boxes. On-site separation shall be undertaken for wallboard to the extent feasible on new construction. (Ord. 529 (part), 2002)