Specifications include, but are not limited to: the furnishing of all materials and doing all work to complete SWS #778 Stormwater Sewer Repair ; Ductile iron pipe is not allowed for sanitary sewer construction on City of Wichita projects. All box culvert, storm sewer, duct bank, waterline and sanitary sewer excavation under proposed pavement shall be sand filled and flushed (jetted and vibrated) ; The sand fill shall start at the top of improved bedding and be brought up uniformly to an elevation 12 inches above the top of pipe, or 2 feet below the bottom of proposed pavement, whichever is higher. However, in no instance shall the sand fill be brought up to less than 6 inches below the pavement subbase material. Storm sewer adjacent to the back of curb and sanitary sewer in front and side lots shall also be sand filled per this provision, to within 2 feet of final grade.
