Specifications include, but are not limited to: Trench Stabilization (Improved Bedding)) for Pipes in Groundwater. Section 801.4, “Trench Stabilization”, delete the second paragraph and replace with the following: Trench stabilization must be installed when any level of groundwater or unstable soils are encountered. Trench stabilization for sanitary/storm sewer pipe will consist of over excavation and placement of Type I bedding material, a minimum of six inches under and on the sides of the pipe, up to middle of the pipe. Any trench stabilization required as a result of surface water entering the trench or to correct inadvertent over-depth trenching will be installed at the Contractor’s expense. All Type I bedding material for trench stabilization must be approved by the City’s Materials Testing Lab prior to use. 3. Improved Bedding. Section 801.5, “Improved Bedding”, revise the first sentence under “General” to the following: Improved bedding shall consist of the zone from six inches (6”) under the barrel of the pipe extending to a level twelve inches (12”) above the top of pipe. “Sanitary/Storm Sewer, revise paragraph “a” as follows: Improved bedding for rigid pipe shall consist of Type 1 or 2 Pipe Bedding Material under the barrel of the pipe extending up to a level equal to the middle of the pipe. Type 3 Pipe Bedding Material shall be used from this level to a level twelve inches (12") above the top of the pipe.