(a) A public or community sanitary sewer system shall be designed and constructed which conforms to the requirements of the Village and the State Environmental Protection Agency. Sanitary sewers in residential developments shall be designed on the basis of 2.7 people per dwelling times the existing/proposed density for the development. Sanitary sewers in areas zoned other than residential shall be designed using good engineering practice and requires approval by the village. If a subdivision is part of a larger drainage area, the sanitary sewer lines shall be designed and constructed to serve the calculated requirements of the entire drainage. (See Appendix C of this chapter for other design criteria.)
(b) The following minimum standards and specifications shall apply to the design of a sanitary sewer system.
(1) Sewer size, other than service laterals, shall be eight inches diameter minimum.
(2) Material shall consist of clay pipe (ASTM C-700 ES) or PVC (ASTM D 3034, SDR 35).
(3) Joints shall meet ASTM C-425 for vitrified clay pipe and ASTM D-3212 for PVC pipe.
(4) Sewer laterals shall meet the following requirements.
A. Minimum size shall be six inches.
B. Tap shall be T or Y connection.
C. Minimum grade shall be 1/8-inch per foot.
(5) Manholes shall meet the following requirements.
A. Wall section shall be precast concrete, four-foot minimum diameter (ASTM C-478) with flexible gasket joints (ASTM C443). Manhold base section may be integral or cast-in-place concrete. Manhole castings shall be Neenah R-1540 with self-sealing cover or approved equal. Manhole castings located in asphalt pavement shall be set in a minimum of twelve inch wide concrete collar with a thickness equal to the pavement section and finished one quarter inch below the pavement surface. Seal the concrete/asphalt interface with liquid asphalt cement.
B. Steps shall be Neenah R-1980-1 cast iron, equivalent aluminum, or plastic encapsulated 1/2-inch reinforcing bar as approved by the Village. Manhole inlets and outlets shall have a neoprene compound gasket (ASTM C-923), link seals or Kor-n-Seal type boots for water tightness. Mortar joint seals will not be used. The maximum distance between manholes shall be 400 feet. Manholes shall be required at all changes in grade, alignment, and pipe size.
(6) Sanitary sewers shall be totally encased in a minimum six inch thickness of fine aggregate compacted per ODOT Item 603.04 for Type B conduits. Sanitary sewers installed under or within five feet of pavements or sidewalks shall be backfilled with ODOT 310 granular material compacted in place. One year of natural settlement may be permitted in lieu of granular material compacted in place if soil conditions appear to be suitable (subject to Village approval).
(7) Testing of sanitary sewer lines shall be done by the subdivider. All materials, labor and equipment required for testing shall be furnished by the subdivider or his contractor. Testing procedures are outlined in Section 1181.16.
(Ord. 81-56. Passed 12-28-81; Ord. 88-5. Passed 3-7-88; Ord. 91-35. Passed 5-20-91; Ord. 93-31. Passed 11-15-93.)