[Ord. No. 2005-24 §1(13.0402), 8-2-2005]
A. Standards for connection into the public sewer system are as follows:
1. The specification for the construction of sewer lines, pumping stations, force mains, and alarm system of the sewer works of the City shall be as set forth in Exhibit A to this Chapter which exhibit is incorporated herein fully by reference thereto as if set forth herein verbatim.
2. Sewer lines of the City will be so constructed as to fully comply with the terms, conditions and specifications of said Exhibit A.
3. Sewer lines shall be designed by an engineer and submitted for approval to the City and the Mo. D.N.R. The design engineer shall certify the sewer lines were constructed and tested in accordance with the approved plans and Exhibit A.
4. Following approval by the Superintendent and certification by the engineer, the City will accept the sewer lines for operation and maintenance.
5. The customer shall obtain the services of an engineer who shall prepare design plans for the required extensions. The plans shall be submitted to the City and Mo. D.N.R. for approval prior to beginning any work.
6. The customer shall obtain the services of a contractor who shall install the sewage works in accordance with the approved plans and Exhibit A.
7. The engineer shall prepare the plans in accordance with the following minimum conditions:
a. Minimum line size shall be eight (8) inches.
b. The design shall conform to the Missouri Department of Natural Resources rules published as "Division 20, Chapter 8, "Waste Treatment Design", latest edition.
c. Gravity flow sewers shall be designed and connected to existing City sewers. Where existing City sewers are not available for connection by gravity flows, a sewage pumping station and pressure main shall be installed. The required sewage works shall meet all the requirements of the Missouri Department of Natural Resources and the City Superintendent.
d. The design shall include building sewer connection, tee or wye, and sufficient service line a point within ten (10) feet of the property to be served. Each end of service line shall be accurately recorded and provided to the City in the form of "as-built" plans.
e. The design shall include a review of the City's ability to provide treatment of the projected organic and hydraulic loading to be discharged from the extension.
f. The plans shall include a plan view at a scale of one (1) inch to fifty (50) feet or larger. The plan shall include a profile view at a scale of one (1) inch to fifty (50) feet or larger for all gravity and pressure mains. Plans with plan views and elevations shall be provided for pumping stations and wet wells. An electrical service detail and wiring diagram shall be provided.
g. Sewage pump station design shall include capacities for adjacent upstream developments. The station alarm shall include a one hundred twenty (120) volt light and horn and a separate twelve (12) V.D.C. alarm light and horn for power failure. The design should attempt to provide sewage flow storage of at least two (2) hours at the peak estimated flow rate using a combination of mains, manholes, wet well, and storage tank or basin. If a tank or basin is to be used, the tank shall be enclosed reinforced concrete and the basin shall have a concrete lining. Where storage is not a viable alternative, a standby generator with auto-transfer switch shall be provided, including specifications for approval by the City.
h. Pressure collection and grinder pump stations are not to be used unless specific approval is obtained from the City. Where grinder pumps are used, a spare pump shall be provided for the first ten (10) units installed, plus one (1) additional spare for each multiple of ten (10) units.
8. The customer shall be responsible for all cost of engineering, construction and any associated cost resulting from the extension of the sewage works.
9. The City will provide written approval for the extension. The City reserves the right to not approve any extension. The City reserves the right to require a main larger than eight (8) inches be installed. If the City exercises this option, the customer will pay the difference in the cost of pipe and fittings, and all cost of installation of the larger pipe and fittings. The City reserves the right to have the pump station enlarged with the customer paying the difference in the cost of the equipment and all cost of installation. The City reserves the right to increase the force main size with the customer paying for the difference in cost of the pipe material and all cost of installation.
10. The City will review its ability to receive, transmit and provide treatment of the wastewater to be discharged by the extension. The City may require the customer to help defray any cost the City incurs to their sewage works to approve the customer's extension request.
11. The customer shall be responsible for acquiring any easements for main extensions where private property must be crossed. The easement shall be approved by the City and the grantee shall be the City. The customer shall obtain a title search to confirm the grantor and record the easement at the Stone County Recorder of Deeds and provide the City with a copy of the recorded document.
12. The customer shall acquire the approval of the City, the County Highway Department, or the Missouri Department of Transportation, where any main extension uses their respective rights-of-way. A copy of the approval or permits shall be provided to the City.
13. The building sewer shall be constructed of pipe and fittings meeting the current A.S.T.M. specifications as listed in Appendix "A". If the building sewer is installed in filled or unstable ground, the building sewer shall be of cast iron soil pipe.
14. All joints and connections shall be made gas-tight and water-tight. Connections between pipe of different materials shall be made by adapters specifically designed for that purpose and shall provide a gas and water-tight connection.
15. Before joining the pipe in the trench, the bell and spigot surfaces shall be wiped free of dirt or other foreign matter. A lubricant or sealer as recommended by the pipe manufacturer shall be applied to the bell and spigot mating surfaces just before they are joined together.
16. The spigot end shall be positioned into the bell end of the pipe previously laid and shall then be shoved home to compress the joint and to assure a tight fit between the interfaces. Solvent welds shall be made using materials specifically designed for the pipe used. "All purpose glues" shall not be used.
17. The size and minimum slope of the building sewer shall be as provided herein, subject to the review and approval of the Superintendent but in no event shall the pipe inside diameter be less than four (4) inches. The following table shall be used to determine the building sewer line size requirements.
| Inside Diameter | Maximum Discharge Flow Rate | Minimum Grade |
|---|
| 4" | 35 gal./min. | 1.0% |
| 6" | 90 gal./min. | 0.6% |
18. Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such building drain shall be lifted by an approved means and discharged to the building sewer.
19. The depth shall be sufficient to afford protection from frost with a minimum of twenty-four (24) inches including under ditches. All excavations required for the installation of a building sewer shall be open trench work unless otherwise approved by the said inspector. Pipe laying and backfill shall be performed in accordance with ASTM Specification D2321 for plastic and ASTM C12 for cast iron soil pipe, except that no backfill shall be placed until the work has been inspected by the inspector or his/her representative. Installation and backfill shall be in accordance with this Chapter and Appendix "C".
20. The building sewer line shall be placed on bedding material with a minimum thickness of three (3) inches. The bedding material shall be used to provide a uniform bearing area for the pipe and joints. Bedding material shall consist of crushed stone ranging in size from a maximum one-half (½) inch diameter to a minimum size which is retained on a No. 4 sieve. Non-crushed creek gravel shall not be used for bedding material. Over excavation of the trench shall be backfilled to the proper grade by the use of bedding materials.
21. In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such drains shall be lifted by approved artificial means and discharged to the building sewer. No water operated sewage ejector shall be used. All costs of operating and maintenance of such lift devices shall be borne of the owner.
22. The connection of the building sewer into the public sewer shall be made at the "T" or "Y" branch designated for that property, if such branch is available at a suitable location. Any connection not made at the designated "T" or "Y" branch in the main sewer shall be made only as directed by the said inspector using a tapping tool, saddle type "T" or "Y" with epoxy cement or gasketed mechanical attachment used to fix the fitting to the pipe.
23. Outside the foundation, the building sewer line shall have a cleanout installed complete with a water-tight plug installed at the ground surface. An additional cleanout shall be placed at each bend in direction forty-five degrees (45°) or greater and in straight runs over one hundred (100) feet in length at maximum intervals of one hundred (100) feet. The alignment of the building sewer line shall be straight with bends made using fittings designed for the degree of bend required. Connections between dissimilar pipe materials shall be made using a flexible water-tight coupling.
24. No person shall make connection of roof downspouts, interior or exterior foundation drains, areaway drains, or other sources of surface runoff or ground water to a building sewer or building drain which in turn is connected directly or indirectly to a public sanitary sewer.
25. The applicant for the building sewer permit shall notify the inspector when the building sewer is ready for inspection and connection to the public sewer. The connection shall be made under the supervision of said inspector or his/her representative.
26. All excavations for building sewer installations shall be adequately guarded with barricades and lights so as to protect the public from hazard. Streets, sidewalks, parkways and other public property disturbed in the course of the work shall be restored in a manner satisfactory to the City.
| Upon completion and approval for the use of the "building sewer", the previously used septic tank, cesspool, privy vault or other forms of treatment shall be taken out of service by first pumping the contents from the septic tank, etc., by a property licensed septic tank cleaning service, then removing or caving in the facility and filling with crushed rock or earth fill. The results of abandonment shall leave a safe, environmentally sound and aesthetically pleasing site. |