It is the sole responsibility of the subdivider/developer to provide a sanitary sewage disposal system for every subdivision or development which complies with the regulations of the State Department of Public Health (“Private Sewage Disposal Licensing Act and Code,” being ILCS Ch. 225, Act 225, §§ 1 et seq.), the IEPA and/or the Madison County On-Site Sewage Disposal Ordinance. In addition, the subdivider/developer shall connect the sanitary sewer mains within the subdivision or development to the public sewer system under the direction and supervision of the city but at no cost to the city.
(A) Requirements for extension of existing mains.
(1) If the public sanitary sewer system is within 300 feet of the proposed subdivision or development, and the system has the available capacity, the subdivider/developer shall extend the existing system and sewer to his or her entire proposed development at his or her own expense.
(2) Should the public sanitary sewer system be more than 300 feet away from the proposed subdivision or development, the city may negotiate with the subdivider/developer to share the cost of extending the existing system and sewer.
(B) Construction plans. The subdivider/developer shall employ a professional engineer registered in the state to first prepare detailed construction plans, including the extension of any existing public sewer main, determine a complete bill of materials and complete all forms and submissions required for a permit from the IEPA.
(1) The plans shall be reviewed by the City Engineer and/or Director of Public Works prior to submittal to the IEPA. It is the subdivider/developer's responsibility to secure IEPA approval.
(2) Design and construction shall be in accordance with the applicable portions of the current edition of the standard specifications for water and sewer main construction in Illinois.
(3) As part of the plans, the subdivider/developer shall locate every sanitary sewer main within the area between the pavement edge and the right-of-way line of the street or within an easement parallel to the right-of-way.
(4) The city shall retain the right to disapprove the proposed location of any sewer main.
(C) Sewer mains. Pipes used for sewer mains shall either be polyvinyl chloride (PVC) sewer pipe conforming to ASTM D 3034, type PSM for sizes eight to 15 inches and ASTM F-679-89 for sizes 18 to 36 inches, or ductile iron pipe conforming to ANSI A 21.51 (AWWA C-151), class thickness 52 designed per ANSI A 21.50 (AWWA C-150).
(1) For PVC pipe, the standard dimension ratio (SDR) shall be a minimum of 35 for sewer mains and laterals less than 12 feet in depth. For sewer mains and laterals greater than 12 feet in depth the SDR shall be a minimum of 26. Also, all drop manholes shall be constructed with SDR-26 pipe.
(2) The PVC plastic pipe shall have a minimum cell classification of 12454-C and shall have a minimum pipe stiffness of 46 pounds per inch (317 kPa).
(3) Joints for PVC sewer pipe shall conform to ASTM D-3212.
(4) FA-6, CA-16 or CM-16 conforming to the requirements of IDOT and manufactured from crushed limestone installed to a minimum depth of four inches shall be used as bedding for all PVC sewer mains.
(5) Ductile iron pipe shall be tar (seal) coated and/or cement lined per ANSI A 21.4 (AWWA C-104) with mechanical or rubber ring (slip seal or push-on) joints.
(6) Mechanical joints and push-on joints for ductile iron pipe shall conform to AWWA C111 and AWWA C600.
(7) (a) The minimum allowable size for sewer mains shall be eight inches in diameter.
(b) The city may require the main to be larger than the minimum size to provide capacity to serve future, adjacent tributary lands. Also, for other reasons, the Director of Public Works may require sewer mains to exceed the minimum sizes. In these cases, the city will pay the difference in material cost from the minimum required size to the requested size. If the same developer constructs the adjoining property, the city's contribution shall be reimbursed.
(8) Both PVC and ductile iron pipe shall be installed and backfilled with CA-6 aggregate in conformance with the Standard Specifications for Water and Sewer Main Construction in Illinois and the standard specification plan sheets.
(9) Where a sewer main crosses under the location of a street, drainage structure, right-of-way or other paved areas, the trench shall be backfilled with CA-6 aggregate or other approved granular material and satisfactorily compacted to the standard specification plan sheets.
(D) Service connections. The subdivider/developer shall provide a six-inch service connection for each residential lot, accomplished byway of a “Y” fitting matching the diameter of the sewer main and the service lateral, made from the same material as the pipes, and installed in the sanitary sewer main in order to provide for connection of the laterals to the sewer main.
(1) The “Y” fitting shall be installed in the sewer main in such a manner so that the centerline of the service riser will be 45 degrees above a horizontal plane through the center of the main.
(2) Material joining the “Y” fitting to the pipes shall be free from cracks and shall adhere tightly to each joining surface.
(3) A log, locating all “Y” fittings by indicating accurate measurements for the distance from the downstream manhole and the depth of the connection at the main, shall be established by the contractor and maintained during installation as a permanent record of the locations and shall be provided to the city prior to the issuance of any occupancy permit.
(E) Service laterals. The subdivider/developer shall provide a six-inch service connection at the “Y” for each residential lot, the lateral of which, shall be extended at least ten feet into the lot, as measured from the lot line, and at least three feet beyond any dedicated easement so as to avoid conflict with other utilities, and then extended vertically to a minimum of three feet above the finished grade level where it shall be terminated with a glued cap capable of withstanding air testing pressures.
(1) All sewer lines shall be installed using a laser to align the sewer to the correct vertical grade and horizontal alignment.
(2) Any transition in the lateral from the “Y” fitting to the vertical shall be made by the use of a series of 45 degree elbows or through the use of a six-inch 90-degree “long sweep.”
(3) The end of the sewer lateral as it extends above grade shall be sealed with a six-inch cap securely glued into place so as to withstand air test procedures.
(4) Pipes used for service laterals shall be six-inch polyvinyl chloride (PVC) sewer pipe conforming to ASTM D 3034, type PSM for service lines.
(5) For the PVC pipe, the standard dimension ratio (SDR) shall be a minimum of 35.
(6) The PVC pipe shall have a minimum cell classification of 12454-C and shall have a minimum pipe stiffness of 46 pounds per inch (317 kPa).
(7) Joints for PVC sewer pipe shall conform to ASTM D-3212.
(8) The minimum allowable grade is 1%.
(9) Service lines shall be installed and trenches backfilled with CA-6 aggregate in conformance with the standard specifications for water and sewer main construction in Illinois.
(10) CA-6 granular aggregate to a minimum depth of four inches shall be used as bedding for all PVC sewer laterals.
(11) Where a sewer lateral crosses under the location of a street, drainage structure, right-of-way or other paved areas, the trench shall be backfilled with CA-6 aggregate or other approved granular material and satisfactorily compacted.
(12) In order to facilitate future location of service laterals, the subdivider/developer shall assure that an “X” is cut into the top back of curb at the point under which the lateral passes.
(F) Manholes. The subdivider/developer shall provide sanitary sewer manholes within the proposed subdivision or development as part of the sewer system design and at locations necessitated by the design.
(1) The manholes shall be constructed of pre-cast Portland cement concrete in conformance with ASTM C-478 and shall be constructed in such a way so as to prevent the leakage of sewage from the manhole or the infiltration of ground water into the manhole. All manholes shall be "Type A" in design and be at least four feet in diameter equipped with A-lock rubber gaskets. Risers and slabs shall be in accordance with ASTM C478. Lifting holes shall be provided in the bases and risers. Lifting hooks shall be provided in flat slabs. Manhole steps shall be constructed of copolymer polypropylene plastic.
(2) Minimum wall thickness for manholes shall be five inches.
(3) Cones and sections shall be substantially free from fractures, large or deep cracks and surface roughness.
(4) Slabs shall be sound and free of gravel pockets.
(5) Manhole steps shall be furnished and installed and shall be either gray cast iron conforming to ASTM A 48 or polypropylene coated steel reinforcing rods with load and pullout ratings conforming to OSHA requirements.
(6) Pre-cast inverts shall be provided in the base sections to accommodate pipe openings with side channel walls extending to roughly the center of the sanitary sewer pipe. Grouting is required around pipes to provide a consistent smooth invert. Special care shall be taken to see that the openings through which pipes enter the structure shall be provided with “A-Lok” flexible watertight connections conforming to ASTM C 923, “Standard Specifications for Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes.”
(7) Special care shall be taken to see that the openings through which pipes enter the structure shall be provided with flexible watertight connections conforming with ASTM C 923, standard specifications for resilient connectors between reinforced concrete manhole structures and pipes.
(8) The maximum distance between manholes shall be 400-feet.
(G) Manhole frames and lids. Castings shall conform to ASTM A 48 and shall be Neenah R-1772, East Jordan 1022 or equivalent cast iron frame and lids with concealed pick holes and self-sealing gaskets in the lid.
(1) Sanitary sewer manhole frame and grates shall be capable of handling H-20 loadings.
(2) In areas that are subject to surface water ponding, frames with stainless steel bolt-down gasketed lids and concealed pick holes which are Neenah R-1915 or equivalent may be required to prevent ground water infiltration.
(3) The word SANITARY shall be cast in the lids of all sanitary sewer manholes.
(4) Lids and frames shall be properly sealed at the time they are adjusted to finished grade. Mastic sealant shall be applied between the concrete and flange of the frame before the lid bolts are tightened.
(5) Adjusting rings may be necessary to place the frame and lid at the correct elevation. Rings may be applied to a height of eight inches. If the adjustment requires more than eight inches, a barrel section must be installed under the cone section.
(H) Sanitary sewer lift stations. The design of lift stations shall conform to “Title 35: Environmental Protection; Subtitle C: Water Pollution; Chapter II: Environmental Protection Agency; Part 370: Illinois Recommended Standards for Sewage Works; Subpart D: Sewage Pumping Stations” of the State of Illinois rules and regulations, and the standard specifications for water and sewer main construction in Illinois, latest edition.
(1) The owner/developer shall install all necessary lift station(s) and appurtenances at no cost to the city. Lift stations shall be considered part of the improvements. The lift station shall be placed within a permanent easement.
(2) All lift station materials, equipment types, and requirements shall be furnished and installed in accordance with details and specifications of the city's Public Works Department. The lift station equipment shall Include emergency pumping capabilities to pump the design peak flow without electric commercial power.
(3) Every lift station shall be located off the traffic way of streets and alleys and shall be enclosed by a fence which has been approved in advance by the city; provided, however, that within subdivisions with restrictions of record, the fence shall conform to the restrictions except that the height of the fence may be varied if required to adequately conceal the lift station components. Areas inside the fence shall be rocked with six inches of CA-6 aggregate.
(4) The subdivider/developer shall provide a permanent road surface of either asphalt or concrete for access to any lift station so that lift stations are readily accessible by maintenance vehicles during all weather conditions.
(5) A two and a half inch flushing hydrant shall be located within 25 feet of the lift station for cleaning purposes.
(6) Sewage lift station structures and mechanical equipment shall be protected from physical damage and designed to remain operational during a 100-year flood event.
(7) Sewage lift station pumps and appurtenances shall be Flygt pumps without exception.
(8) Electrical systems and components shall comply with the National Electrical Code requirements for Class 1, Group D, Division 1 locations.
(9) Electrical panel and controls shall be manufactured by either Climex or Stacon.
(10) The subdivider/developer shall also equip the lift station with an emergency generator. The diesel generator shall be Cummins, Caterpillar, or Onan.
(11) The lift station shall be equipped with a high-water alarm light and a multi-trode communication/emergency telemetering system of the city's choice. For redundancy in design, the lift station shall also have a high-level emergency float.
(12) Under no circumstances shall the wet well inlet be less than four feet above the pumps.
(13) Wet wells shall be a minimum five feet in diameter. Valve vaults shall be a minimum five feet by five feet square. Safety hatches shall be installed on all aluminum access hatches approved by the Director of Public Works.
(14) The emergency high-water mark should be below the lowest basement elevation for all the homes served by the lift station. If allowed by the city by variance, a check valve to prevent backflow should be installed at the right-of-way line on all sewer services with basements lower than the emergency high-water mark.
(15) Sanitary sewer force main shall be pressure tested and installed with THWN No. 12 tracer wire.
(16) Existing system improvements. Improvements to downstream sewerage facilities including sewers and pump stations may be required to provide sufficient capacity to serve the increase in tributary flow of a proposed sanitary sewer extension as determined by the Director of Public Works. If the improvements are required solely for the development, the city will require the owner/developer to pay all the cost of the downstream sewer system improvements to provide for the increased capacity. If the improvements are also required for future development, the city will pay the difference in cost from the minimum required improvements to the requested improvements. If the same developer constructs the future development(s), the city's contribution shall be reimbursed.
(17) All lift station components, design criteria and IEPA permit application shall be reviewed by the City Engineer and/or Director of Public Works prior to approval for construction.
(I) Inspection and testing sanitary sewer system piping. All sections of all sanitary systems, including sewer mains and laterals, shall be air and mandrel tested by a qualified testing agency or firm hired by the subdivider/developer who bears all cost for the testing.
(1) Testing of sewer mains and laterals shall be performed within 60 days after completion of installation.
(a) As a minimum, a testing agency or firm shall not be considered as qualified unless it is independent of the contractor installing the sanitary sewer system, demonstrate competency in the performance of air and mandrel tests, follow standard safety practices for performing testing in confined spaces, and is insured, including for errors and omissions. As such, the city has the right to approve or not approve any agency or firm.
(b) The Director of Public Works shall be present during the performance of all testing work and shall be notified of the time and place of testing at least 48-hours prior to commencement of the test.
(2) When air testing, all sanitary sewer mains and laterals which are eight inches or less in diameter shall be pressurized to at least four psi above the surrounding ground water pressure. A section of pipe shall be considered to have “passed” air testing if the pressure does not drop below three psi for a minimum duration of five minutes.
(3) Sewer mains over eight inches in diameter shall be tested as required by the City Engineer.
(4) The testing agency or firm shall notify both the subdivider/developer and the city in writing of the results of all tests as soon as possible after the tests are performed.
(5) Should any test fail, the subdivider/developer shall make repairs and arrange for the test to be performed again and shall continue to make repairs and perform testing until each section of pipe has passed the tests.
(J) Inspection and testing of sanitary sewer manholes. All sanitary sewer manholes shall be vacuum tested in accordance with ASTM C1244 - 05ae1 Standard Test Method for Concrete Sewer Manholes by the negative air pressure (vacuum) test prior to backfill.
(K) Maintenance. The subdivider/developer shall be responsible for all maintenance of sewer mains, manholes, lift stations, service connections and service laterals until such time as the paving of the streets and the grading adjacent to the sewer is complete and the improvements are officially accepted by the City Engineer and/or Director of Public Works.
(L) Warranty. The subdivider/developer shall notify the city in writing when initiating the operation of any new sanitary sewer system and shall thereafter be responsible for any and all defects in the system including sewer mains, manholes, lift stations, service connections and backfill settlement for a period of two years.
(Ord. 2009-21, § 18.5-3-37, passed 10-5-2009; Ord. 2017-03, passed 3-6-2017)