A. Trench Excavation - Do not start until pipe and other materials are at the site. Open up only that length of trench which can be backfilled the same day. Shoring shall comply with “Trench Construction Safety Orders” of the California State Industrial Accident Commission. Pavement shall be scored to neat lines and removal shall not cause damage to pavement outside the scored lines. Excess excavated material shall be removed immediately from the site. B. Cross Trench - more than 10 degree angle with the centerline of road or any trench less than 50 feet long in the pavement or within four feet of paved area shall be backfilled with Class II Aggregate Base and the structural section replacement in the paved area. C. Longitudinal Trench - less than 10 degree angle with the centerline of road and greater than 50 feet long in all paved areas including curbs, sidewalks or other concrete shall be backfilled with Class II Aggregate Sub-base (or better material), from the top the top of pipe bedding to the bottom of the replacement structural section. The remaining trench shall be backfilled with the structural replacement in paved areas. In all other areas, longitudinal trenches may be backfilled from the pipe bedding to the ground surface with suitable material from the excavation or better material. D. Compaction - The relative compaction of all trench backfill below the roadway structural sections shall not be less than 90 percent. The structural section shall be compacted to not less than 95 percent. No jetting is allowed under any paved roadway or within a distance of four feet from the edge of existing pavement. Backfill shall be compacted by impact, vibration or any combination of these. Jetting will be allowed only when more than four feet from the pavement and when the backfill and trench are suitable for jetting and shall be supplemented with mechanical compaction in four-foot maximum layers. E. Temporary Paving - Temporary paving (or permanent paving) shall be placed at the end of each work day. Temporary pavement shall be 1½-inch minimum thickness and shall be replaced within four weeks with permanent pavement. F. Base and Pavement Replacement - The roadway structural section shall be replaced as stated in the permit. Otherwise, replacement shall be in kind except that the minimum replacement shall be two inches of asphalt concrete and 16 inches of Class II Aggregate Base.