(a) Water Supply.
(1) Waterlines.
A. All water supply systems shall comply with the requirements of the Ohio Environmental Protection Agency and the City. Service lines shall be provided only where subsurface conditions would make later installation impossible without removal of pavement. Dead-end lines are prohibited unless the line is less than four hundred (400) feet long and a hydrant is placed on the end. Water lines shall be of such size as is constant with the overall development of the community and shall meet the requirements of the City Engineer but shall not be less than six (6) inches in diameter.
B. Cast iron pipe shall be in accordance with the American National Standard Association Specifications A 21.6, A 21.8 and A 21.11. Ductile iron pipe shall be in accordance with the American National Standard Association Specifications A 21.50 and A 21.51 or asbestos cement pressure pipe ASTM C 296-72 or equal. All pipe joints shall be of the slip-on type using a rubber ring gasket. Upon approval by City Council, the developer may request the use of PVC waterline pipe AWWA C-900.
C. Fittings shall be in accordance with the American National Standard Association Specifications A 21.10 and joints shall be in accordance with the American National Standard Association Specifications A 21.11 for mechanical joints.
D. Lining on all cast iron or ductile iron pipe and fittings shall be standard thickness cement mortar in accordance with American National Standard Association Specifications A 21.4.
E. Hydrostatic tests of all pipe shall be made before acceptance and shall be to the working pressure of the pipe. Permissible leakage shall not exceed seventy-five (75) gallons per twenty-four (24) hours per mile of pipe per inch at diameter.
F. Disinfecting of pipe shall be accomplished in the following manner: Before acceptance, lines shall be drained and then filled at a slow rate with chlorine being introduced to provide a minimum of fifty (50) parts per million. Should the chlorine residual at the end of the 24-hour period be less than ten (10) parts per million residual at the end of a 24-hour period is attained.
G. Following the disinfection period, the line shall be drained and flushed until the replacement water throughout the entire length of the line shall, upon test, be equal in quality to the water from the existing system. Bacteriologically, the City shall test the quality of the water, and if the bacteriological test is unsatisfactory, the Contractor shall repeat the entire disinfecting process until a satisfactory test is achieved.
H. Trenches for water lines shall be excavated and backfilled in accordance with the current State of Ohio Department of Transportation Construction and Material Specifications, Section 603, for Type C conduits. Water lines shall be bedded with aggregate 6" deep. Water lines installed under pavements or sidewalks shall be backfilled with Ohio Department of Transportation Item 310, granular material compacted in place.
I. There shall be a minimum of four (4) feet of cover over water lines at all locations and 18" vertical and 10' horizontal separation from any sanitary sewer, unless otherwise directed by the City Engineer.
(2) Valves. Valves shall be in accordance with the American Water Works Association Standard Specifications C 500 and shall be double-disc gates with non-rising stems. Valves shall be open by turning the stems in a counter-clockwise direction with a two (2) inch square operating nut. Valve boxes shall be 3-piece valve box, cast iron, five and one-quarter (5-1/4) inch screw adjusting type as manufactured by Clow Corporation or approved equal. Valve shall be installed at street intersections, in all directions for isolation. Air release valves as required by the City Engineer.
(3) Fire hydrants. Fire hydrants shall be in accordance with the American Water Works Association Standards Specifications C 502 and shall have a six (6) inch diameter, mechanical joint base. The hydrant shall include provisions for lengthening the barrel and for facing nozzles in any of eight (8) positions and shall be the safety flange type. The hydrant valve shall be five and one-quarter (5-1/4) inch and open counter-clockwise with a one (1) square inch operating nut. There shall be two (2) two and one-half (2-1/2) inch nozzles and one (1) four and one-half (4-1/2) inch steamer nozzle with National Standard Thread. Fire hydrants shall be of the safety flange break- away type with safety type stem couplings to allow the upper section of the hydrant barrel to separate from the lower section upon impact without damage. The main valve shall open against the water pressure and shall stay tightly closed if the hydrant is broken off or damaged. Fire hydrants shall conform to AWWA C-502 and shall be Mueller Type A-423 or Watrous Pacer hydrants or approved equal which shall have traffic break away flanges, one pumper nozzle and two supply nozzles. Fire hydrants shall be spaced 300' business and 500' residential. Where there is a dead end line, a flushing hydrant shall be provided.
(4) Service lines. Service lines shall be Type K, soft tempered copper or polyethylene high-density pipe, 160 pounds per square inch rating. Unions, where required, shall be Mueller Company H-15400 three-part union or equal. The requirements listed above are for three-quarter (3/4) inch water services. Where larger water service lines are required, components shall equal the above in quality as determined by the City Engineer. The minimum final cover over water service lines shall be four (4) feet.
(b) Sanitary Sewers.
(1) General. All public and community sanitary sewer systems shall comply with the requirements of the Ohio Environmental Protection Agency, as well as the requirements of the county of jurisdiction and the City of New Lexington.
(2) Pipe. Sanitary sewer pipe and installation shall meet the following specifications:
A. Sanitary sewers shall be designed on the basis of ten (10) persons per acre for a single-family residential area. If the subdivision is so located that it is part of a larger drainage basin, the sanitary sewer line shall adequately serve the calculated requirements of the entire drainage basin. The following per capita flows shall be observed in size determination of sanitary sewers.
B. Average Per Capita Flow = 100 gallons per day
Lateral and sub-main sewers = 400 gallons per capita per day
Main, trunk and outfall sewers - 250 gallons per capita per day
C. Minimum pipe size shall be eight (8) inches in diameter and five (5) feet in length. Minimum pipe size for house service shall be six (6) inches in diameter and four (4) feet in length and one shall be provided and extended to each lot line. Minimum grade for house laterals shall be 1/8" per foot over the entire run.
Main Sizes (inches) | Minimum Grade (percent) |
8 | 0.40 |
10 | 0.28 |
12 | 0.22 |
14 | 0.17 |
15 | 0.15 |
16 | 0.14 |
18 | 0.12 |
21 | 0.10 |
24 | 0.08 |
D. For sizes larger than twenty-four (24) inches, the minimum grade shall be considered as that which produces a full flow velocity of not less than two (2) feet per second.
E. Sewer pipe shall be vitrified clay pipe meeting ASTM Standard C- 700ES, ABS Truss Pipe meeting ASTM D2680, or PVC Pipe meeting ASTM D-3034 SDR35. Joints for vitrified pipe shall meet ASTM C425, premium joint, for PVC joint ASTM D3212. Service pipe and fittings for use with ABS pipe shall meet ASTM Standard D 2752. When PVC pipe is used, extra care shall be used during installation and backfill to insure proper lateral support.
F. Infiltration tests of a sewer line shall be made before acceptance. Tests shall be made from manhole to manhole or as may be ordered by the City Engineer. The maximum allowable infiltration shall be 200 gallons per inch of pipe diameter per mile per day. Exfiltration tests may be required by the City Engineer and the allowance shall be increased an additional ten (10) percent of each additional two (2) foot of head over a basic two (2) foot minimum internal head
G. As an alternative to the above, the Contractor may perform a low- pressure air test. The method referred to as "air testing" consists of applying low-pressure air to the section of sewer to be tested and recording the length of time in minutes for the internal air pressure to decrease from 3.5 to 2.5 pounds per square inch (greater than the average back pressure of any groundwater that may submerge the pipe). The time elapsed shall not be less than the time shown for the given size pipe per 100 foot of pipe in a table which is based on equations from ASTM C 828 which will be furnished by the City Engineer. All methods, materials, equipment and procedures shall be in accordance with the requirements of the Ohio Environmental Protection Agency.
H. All materials and equipment required for "tests" shall be furnished by the developer or contractor at their own expense.
I. Trenches for sanitary sewer shall be excavated and backfilled in accordance with the current Ohio Department of Transportation Construction and Material Specifications, Section 603. Sanitary sewers installed under pavements or sidewalks shall be backfilled with Ohio Department of Transportation Item 310 Granular Material Compacted in Place.
(3) Manholes.
A. Manholes shall be spaced at maximum intervals of four hundred (400) feet or less and at all grade, alignment and pipe size changes. Manhole walls shall be precast concrete and shall conform to American Society of Testing Materials Designation C 478, with tongue and groove type joints fitted with a flexible gasket conforming to American Society of Testing Materials Designation C 443. The manhole base section shall be furnished with an integral reinforced concrete bottom slab.
B. Manhole castings shall be Neenah Foundry R-1040 with Type E ventilating cast iron covers or an approved equal. Covers shall be designated “Sanitary Sewer.” Manhole steps shall be Neenah Foundry R-1980-1 cast iron steps, aluminum steps, poly vinyl chloride, or an approved equal.
C. Inlet and Outlet Seal. The manhole inlet and outlet holes shall have a permanent, flexible watertight joint between the manhole wall and the sewer pipe utilizing a neoprene compound gasket. Sealing the joints with mortar will not be acceptable. The gasket materials shall meet the requirements of ASTM C-443. All metal components of the joint, if any, shall be corrosion resistant such as anodized aluminum stainless steel or cast iron. There shall be a one-half (½) inch capped pipe nipple approximately ten (10) inches long installed through the manhole wall just above one of the openings provided for the sewer pipe. This pipe nipple shall be utilized in determining the depth of groundwater over the sewer. Manholes shall be designed and constructed in accordance with the design shown in ODOT Standard Construction Drawing MH-3.
(4) Individual sewage disposal facilities will only be permitted when unfeasible to connect to the City sewer.
(Ord. 82-16. Passed 4-19-82.)