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(A) Design. All subdivisions shall be designed so the proposed sanitary sewer system does and accomplishes the following:
(1) Extends interceptor sanitary sewers through the proposed subdivision to serve upstream properties in the natural drainage area.
(2) Provides sanitary sewer services with separate service connections terminating not less than two feet inside the property or easement line to each proposed lot of record.
(3) Provides adequate capacity to drain the portions of the subdivision proposed to be served by the sewer, and any property upstream thereof which drains into or may drain into that sewer, based on the effluent discharge reasonably expected from the development to the type and to the maximum density permitted by the then-existing zoning regulation of the village for property within the corporate limits, and the land comprehensive plan for property outside the corporate limits.
(a) Provides public manholes at the end of each line, at all changes in grade, size, or alignment, at all intersections, and at distances not greater than 400 feet for sewers 15 inches or less, and 500 feet for sewers 18 inches to 30 inches. Greater spacing may be permitted in larger sewers and in those carrying a settled effluent.
(b) Provides a drop pipe for sewers entering a manhole at an elevation of 24 inches or more above the manhole invert. Where the difference in elevation between the incoming sewer and the manhole invert is less then 24 inches, the invert should be filtered to prevent the depositing of solids.
(5) Maintains separation from public water supply system.
(6) Discourages the use of sewage pumping facilities.
(7) Permits the use of private sewage, disposal systems only in the following situations:
(a) Public water and public sewer not accessible, minimum size lot for private sewage disposal shall be 4,356 square feet.
(b) Public water available, minimum size lot for private sewage disposal shall be 2,000 square feet.
(c) Private sewage system shall be installed in accordance with county standards.
(8) Designed to prevent installations of sanitary sewers in the rear or side yard easements.
(B) Right-of-way dedication. All sanitary sewers shall be installed in public easements or dedicated public rights-of-way. Easements and rights-of-way shall be of sufficient width and the sewers shall be installed at such locations as to permit open-cut installation, maintenance, and repair within the confines of the easement or right-of-way without relocation or unreasonable interference with other public utilities located therein, and so as to meet the following minimum standards: 15 foot width, plus five feet for each additional utility, plus, for sanitary sewers in excess of 24 inches diameter, two additional feet for each 12 inches or portions thereof of additional sewer diameter; provided, however, if sanitary sewers exceed 15 feet in depth, additional right-of-way may be required.
(C) Construction standards. All sewers shall use materials and be installed in such manner meeting or exceeding the required standards and specifications contained in the "Standard Specifications for Water and Sewer Main Construction in Illinois," the current edition as then modified, supplemented, and amended by the modifications, amendments, and amplifications of the Village Engineer, available at the Public Works Department.
(D) Oversizing. Where applicable, the developer/subdivider shall install sanitary sewer mains sufficient in size and depth to carry sanitary discharge from the upstream properties naturally tributary to the proposed subdivision. The village may make special provisions for that developer/subdivider to recapture those additional costs incurred as a result of oversizing and over-excavating the sanitary sewer.
(E) The developer will be required to monitor the flow from the site for a period of at least two months (encompassing at least two major storm events) to identify any excessive inflow/infiltration occurring in the system. The data must be submitted to the village prior to acceptance of the public improvements.
(Ord. 2313-95, passed 2-1-95; Am. Ord. 12-1014, passed 11-7-12)