Specifications include, but are not limited to: constructing Water Distribution System to serve Turkey Creek 4th Addition Ph 1B; Composition of Asphaltic Mixtures: Aggregates, mineral filler and asphalt shall comply with the requirements, as stated previously in this subsection. The Contractor shall submit to the Engineer before December 31 of each calendar year a complete listing of Individual Aggregate Sieve Analysis, Mix Combination Sieve Analysis and any other pertinent data on the mixes to be used during the following calendar year. The Engineer may use the submitted design in whole or in part, at his discretion. The mix design shall be adjusted as necessary when a change in the source of materials is approved. Any mix design that proves to be unsatisfactory shall be adjusted by the Engineer. There shall not be less than three percent (3%) or more than twenty-five (25%) of material between any two successive sieves in the following series: No. 4, 8, 16, 30 and 50. The requirements for percent retained on the No. 200 sieve (dry screen) will be waived, provided the plasticity index of the mineral filler is four (4) or less. Salvaged hot mix asphaltic materials may be recycled and combined with new materials to produce asphaltic base course and surface mixtures for use in construction of such base courses and surface courses as required by plans. The combination of salvaged hot mix asphaltic material with new materials shall not exceed thirty-five percent (35%) for base course mixtures or fifteen percent (15%) for surface course mixtures. Recycled materials will not be allowed in the BM-IB surface mixture. All base course mixtures containing recycled asphaltic material shall conform to the standard specification requirements for the base mix used on the project. All surface course mixtures containing recycled asphaltic material shall conform to the standard specification requirements for the surface course mix used on the project.; Warm Mix Asphalt (WMA).: Section 405.2, “Materials and Manufacture”, add the following: When using WMA the Contractor shall submit a mix design to the Engineer for review at the preconstruction conference or prior to starting the project. All materials used in the production of WMA shall comply with the latest City of Wichita Engineering Standard Specifications. The following shall be submitted by the Contractor to Engineer: plant mixing temperatures, temperature range for compacting, WMA technology information and recommended rate of application.; Concrete batch tickets. Section 406.2, “Mixing”, add the following: Provide a batch slip issued at the batching plant including batch weights of every constituent of the concrete and time of charging of the mixer drum with cementitious material and aggregates. Include quantities, type, product name and manufacturer of all admixtures on the batch ticket for each batch delivered to the project.; Immersion Vibrators. Section 406.3, “Placing and Finishing”, add the following: All concrete pavement, including streets, driveways, valley gutters, and intersections shall be vibrated with an immersion vibrator. Use of a vibrating screed as the sole source for consolidation of concrete pavement will not be allowed.; Sand Cushion. Section 407.3, “Construction Requirements”, replace the first sentence of the sixth paragraph with the following: A sand cushion may be placed on the foundation prior to the construction of sidewalk, driveway approaches and wheel chair ramps when approved by the Engineer. Sand cushion is not allowed under curb and gutter and street pavement.; 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.