(A) All subdivisions shall be provided with an approved sewage collection and treatment system at the developer’s expense. In the city and in all areas of the ETJ, subdivisions shall be served by the city’s sewage collection and disposal system unless otherwise authorized by the Council. When the city considers it unreasonable to extend city’s primary sewage collection and disposal system to a proposed subdivision located in the city’s area of jurisdiction, then a developer may construct a sewage collection and treatment system to create a satellite sewerage system to serve the subdivision. The satellite system shall be constructed at the developer’s expense unless provided otherwise by the developer’s contract. Upon completion, the satellite system shall become the property of the city and the city will operate, maintain, and utilize the system to the benefit of all its sewage collection and disposal users. Satellite systems will be incorporated into the city’s overall sewage collection and disposal system as service areas expand.
(B) On-site sewage disposal systems licensed by Grayson County may be installed in Residential Estates Subdivisions unless specified otherwise by the city.
(C) Where sewer lines are to be installed on private property, the developer shall pay the cost to secure the necessary easements in the name of the city.
(D) All sewer pipe shall be PVC or other material approved by the City Engineer.
(E) All pipe joints shall be rubber ring gasket type conforming to the applicable ASTM standards.
(F) Sewers in residential areas shall be a minimum of six inches diameter. Sewers in commercial and industrial areas shall be a minimum of eight inches diameter.
(G) If a sanitary sewage treatment system is to be installed, the plans for such system shall be approved according to the regulations of the state and a permit secured from the state prior to approval of the final plat by the City Council.
(H) The sewage collection system shall be designed to handle the anticipated flow of sewage from the subdivision, including development of future sections of the same subdivision.
(I) All sewer lines shall be on such a grade as to provide a minimum velocity of two feet per second using an “n” value of .013 in the Manning Formula.
(J) The minimum size line, excluding house service lines, shall be six inches in diameter.
(K) Manholes shall be spaced according to the standards of the state regulatory agencies.
(L) The city may require larger sewer lines than are necessary to serve the subdivision and future development, and adjacent areas. In the event that larger lines are required, then the developer may be entitled to participating aid from the city on oversized lines when city funds become available.
(M) Should a lift station, either temporary or permanent, be necessary to provide sanitary sewer service to the subdivision, the developer shall construct the station and all appurtenances at his own expense. If and when the lift station is no longer needed, the installation will, unless other provisions are made, remain the property of the city for reuse or disposal.
(N) Sewer service lines for each lot shall have a minimum internal diameter of four inches and shall be installed on a minimum grade of 1%. Minimum cover at the property line shall be two feet. Tracer tape shall be installed to indicate the location of the sewer stub out.
(O) Unless provided otherwise in the developer’s contract, off-site sewerage utilities shall be constructed by developers at no expense to the city.
(P) Prior to acceptance, the sanitary sewers shall be subjected to an air leakage test and mandrel test.
(Q) The City Engineer may require, at the developer’s expense, a TV examination of the sewer prior to acceptance.
(R) The design of sewers shall conform to the criteria set forth by the state regulatory agency.
(S) Sewer shall have four-inch crushed stone bedding and six inches of crushed stone above the pipe.
(Ord. 933, passed 8-9-05) Penalty, see § 153.999