A. General Requirements: The applicant shall install wastewater sewer facilities in a manner prescribed by the Village construction standards and specifications. All plans shall be designed and approved in accordance with the rules, regulations, and standards of the Public Works Director or designee. Necessary action shall be taken by the applicant to extend wastewater sewers for the purpose of providing sewer facilities to the subdivision.
B. Design Criteria For Wastewater Sewers:
1. General Guidelines: These design criteria are not intended to cover extraordinary situations. Deviations will be allowed and may be required in those instances when considered justified by the Public Works Director or designee. (Ord. 2015-18, 4-28-2015; amd. Ord. 2018-07, 4-24-2018)
2. Sewer Plans: All wastewater sewer plans must be in conformance with "Standard Specifications for Water and Sewer Main Construction in Illinois" (latest edition) (referenced as Standard Specifications, hereafter) and the Illinois Recommended Standards for Sewage Works, part 370, latest edition. If there is a conflict between the specifications and these regulations, the more stringent provision shall apply.
3. Sewer Pipe: Wastewater sewer pipe shall be SDR35PVC conforming to ASTM D3034, with joints conforming to ASTM 3212. Service sewers and risers shall be SDR35PVC conforming to ASTM D3034, with joints conforming to ASTM 3212.
4. Backfill: Selected granular backfill case III shall be type CA-6 and shall be used at all locations where sewer mains and services are installed for the full depth under areas to be paved and shall extend three feet (3') beyond all paved surfaces.
5. Embedment: Pipe embedment Class III shall be used for all wastewater sewer mains and installed in accordance with ASTM D2321.
6. Air And Deflection Testing: Air and deflection testing of all new wastewater sewer mains shall be performed in accordance with section 31.1.11 of the Standard Specifications. The contractor is required to provide all materials and manpower necessary for testing. The contractor shall notify the Village Public Works Department when the testing takes place so that a Village representative can be present.
7. Manholes: All manholes shall be type A in design and four feet (4') 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.
8. Manhole Frames And Lids: All manhole frames and lids shall be either Neenah type R-1916D, Deeter type 1270 series or East Jordan type 1058ZPT. The manhole lid shall have cast in the center the word "wastewater". Mastic sealant shall be applied between the concrete and flange of the frame before the lid bolts are tightened.
9. Minimum Slope For Wastewater Service Laterals/Risers: Minimum slope for all wastewater service laterals shall be one-eighth inch (1/8") per foot. Sewers installed greater than ten feet (10') deep shall have a section of sewer service lateral and a plug installed from a tee location to an elevation not less than eight feet (8') below finish grade. The service line shall be extended to be three feet (3') above finished grade and capped.
10. Staking Of Service Laterals: The end of each service lateral shall be marked with an iron fence post five feet (5') long left at least three feet (3') above the finished grade.
11. Switching Flow: The contractor shall obtain approval from the Village Public Works Department before switching flow from the new sewer to the existing system. (Ord. 2015-18, 4-28-2015)
12. Minimum Diameter: All wastewater sewer mains shall be a minimum of eight inches (8") in diameter. In certain instances, the Public Works Director or designee may require wastewater mains to exceed eight inches (8") in diameter. The larger size mains, if required, will be to provide capacity for adjacent lands tributary to the proposed sewer line as determined by the Village. The Village will pay no cost for sewer mains up to fifteen inches (15") in size. Should a sewer larger than fifteen inches (15") be required, the difference in material cost only will be paid for by the Village. Larger size mains greater than eight inches (8") may be required to be constructed to provide for capacity of other adjacent land tributary area by the Public Works Department, Planning Commission or the Village Board. The Village will pay no cost for sewer mains up to fifteen inches (15") in size. (Ord. 2015-18, 4-28-2015; amd. Ord. 2018-07, 4-24-2018)
13. Building Connections: All wastewater sewer connections to buildings shall be a minimum of six inches (6") in diameter.
14. Additional Standards: The subdivider shall comply with all additional standard Village requirements for the installation of wastewater sewer mains.
15. Lift Stations And Force Mains: All lift station materials, equipment types, and requirements shall be furnished and installed in accordance with details and specifications of the Village Public Works Department. The lift station equipment shall include emergency pumping capabilities to pump the design peak flow without electric commercial power.
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 Village Public Works Department. The Village Board of Trustees may require the individual or developer to pay the cost of the downstream sewer system improvements to provide for the increased capacity.
17. Minimum Standards And Requirements: The minimum standards for design, as built record drawing requirements and minimum GIS information requirements as described in subsections 11-5-5C, D, and E of this chapter. Water facilities also apply where applicable for sewerage facilities described in this section.
18. Sewers Near Dams: Pressurized sewers shall not be constructed in dam embankments or within a distance of one dam height from the toe of the dam. Nonpressurized sewers should be required to have watertight joints. (Ord. 2015-18, 4-28-2015)
Notes
| 1 | 1. See also subsection 8-3-5D of this Code. |