Each residential, commercial or industrial use shall be serviced by an adequate sanitary sewage collection and disposal system.
(a) All public sanitary sewers shall be eight inches in diameter or larger, constructed at such a gradient as to maintain a minimum velocity of two feet per second or greater when flowing at 50% capacity using Kutter’s "n" value of 0.013. All sewers shall be designed and installed so that at maximum rate of flow, the flow shall not exceed 70% of absolute theoretical capacity.
(b) After construction and cleaning, all main sewers including the manholes, laterals and house connections, shall undergo an infiltration or exfiltration test. The controlling water level shall not be less than three feet above the top of the pipe or the ground water table at the upper end of the section being tested. The maximum allowable rate of infiltration or exfiltration shall not exceed 100 gallons/inch diameter/mile of sewer/day.
(c) All service connections to public sanitary sewers shall be six inches in diameter or larger with a minimum slope of one-eighth inch per lineal foot of pipe, and shall extend from the main sewer to the limits of the dedicated right-of-way or utility easement. The last two bell ends and the stopper for each connection shall be painted yellow for purposes of identification. Service connections shall meet the same material specifications as public sanitary sewers.
(d) All public sanitary sewers 15 inches in diameter or less, including service connections thereto, constructed within the limits of the right-of-way shall be constructed of extra strength clay pipe ASTM Int’l. specification C-700 with pipe joints ASTM C-425, or Polyvinyl Chloride (PVC) minimum SDR35 with pipe joints ASTM specifications D3212-73T, as determined by the City Engineer.
(e) All public sanitary sewers 18 inches in diameter or more, constructed within the limits of the right-of-way or easements, shall be constructed of reinforced concrete pipe meeting the specifications of the ASTM, Int’l. specification C-76 with joints of a factory fabricated flexible gasket, meeting the specifications for joints for circular concrete sewer, using flexible, watertight, rubber type gaskets, ASTM specification C-443.
(f) Unless otherwise specifically authorized the minimum depth of the invert of the sanitary sewer connection at the right-of-way line shall be six feet below the established centerline grade of pavement.
(g) In general, sanitary manholes shall be constructed at all changes in alignment and grade of the sewer, and at maximum intervals of 350 feet on sewers to 24 inches diameter and at maximum intervals of 450 feet on sewers over 24 inches diameter.
(h) Prior to construction, the applicant shall submit plans for the construction of sewage collection to the Ohio Environmental Protection Agency for approval.
(Ord. 16-19. Passed 9-16-19.)