Specifications include, but are not limited to: a. Except as otherwise provided herein, all buildings and structures including retaining and foundation walls,steps, piers and other artificial objects and obstructions shall be completely razed and removed to a depth of at least one foot below ground level. b. Wells, cisterns, cesspools, outdoor toilets, basements, cellars, septic tanks, etc., and holes and trenches resulting from demolition and removal shall be filled to ground surface. Rock materials from masonry construction may be used in the backfilling up to a depth of one foot below ground surface if sufficient fine materials are mixed therewith tofill the voids. Underground tanks are to be removed and the areas filled. Dirt shall be used for the top one foot of backfill. For rough grading, rock materials from masonry construction with a maximum dimension of nine inches may be used in all except the top one foot of the fill. provided such rock and materials are well distributed in earth. All fill material shall be free from trash, wood. pipe and debris. c. The CONTRACTOR shall, after clearing property, grade and clear the property so as to allow for complete run-off of surface water and insure that there are no broken boards, rock, concrete, masonry pieces or debris of any kind that would prevent or hinder mowing of the property. The property shall be left in a hazard-free condition. All detached assessory or out buildings shall be removed unless otherwise instructed by the City. d. Masonry walls shall be demolished in small sections. Structural steel, cast iron and heavy timbers shall be removed by individual pieces and lowered carefully. All floor construction over basements and cellars shall be removed, regardless of elevation.