Village of Oxford, NY Article V New Sewers or Sewer Extensions

§ 230-22 Proper design. [1]

New sanitary sewers and all extensions to sanitary sewers owned and operated by the Village of Oxford shall be designed in accordance with the Recommended Standards for Sewage Works, as adopted by the Great Lakes-Upper Mississippi River Board of State Sanitary Engineers (Ten State Standards), and in strict conformance with all requirements of the NYSDEC. Plans and specifications shall be submitted to and written approval shall be obtained from the Wastewater Treatment Operator and the NYSDEC before initiating any construction.

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

§ 230-23 New sewers. [1]

A. Approval; fees; inspection; testing; reporting. When a property owner, builder or developer proposes to construct sanitary sewers or extensions to sanitary sewers in an area proposed for subdivision, the plans, specifications and method of installation shall be subject to the approval of the Wastewater Treatment Operator in accordance with § 230-22. Said property owner, builder or developer shall pay for the entire installation, including a proportionate share of the treatment plant, intercepting or trunk sewers, pumping stations, force mains and all other Village of Oxford expenses incidental thereto. Each street lateral shall be installed and inspected pursuant to Article VI, and inspection fees shall be paid by the applicant prior to initiating construction. The design and installation of sewers shall be as specified in §§ 230-24 through 230-28 and in conformance with Paragraphs 3 through 6 of ASTM Specification C-12. The installation of the sewer shall be subject to periodic inspection by the Wastewater Treatment Operator. The Wastewater Treatment Operator shall determine whether the work is proceeding in accordance with the approved plans and specifications, and whether the work will conform to the approved plans and specifications. The sewer, as constructed, must pass the infiltration test (or the exfiltration test, with prior approval) required in § 230-25, before any building lateral is connected thereto. The Wastewater Treatment Operator shall be notified 30 days in advance of the start of any construction actions so that such inspection frequencies as may be necessary or required may be established. No new sanitary sewers will be accepted by the Village of Oxford Board until such construction inspections have been made, so as to assure the Village of Oxford Board of compliance with this chapter and any amendments or additions thereto. The Wastewater Treatment Operator shall report all findings of inspections and tests to the Village of Oxford Board.

B. Plans, specifications, and pipe test results required. Plans, specifications, and methods of installation shall conform to the requirements of this Article. Components and materials of wastewater facilities not covered in this chapter, such as pumping stations, lift stations or force mains shall be designed in accordance with § 230-22 and shall be clearly shown and detailed, on the plans and specifications submitted for approval. When requested, the applicant shall submit to the Wastewater Treatment Operator all design calculations and other pertinent data to supplement review of the plans and specifications. Results of manufacturer's tests on each lot of pipe delivered to the job site shall also be furnished upon request.

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

§ 230-24 Pipe specifications and installation.

A. Sewer pipe specifications.

(1) Sewer pipe material shall be:

(a) Reinforced-concrete pipe. (Note that nonreinforced concrete pipe shall not be used.)

[1] The pipe and specials shall conform to ASTM Specification C-76. The reinforcing wire cage shall conform to ASTM Specification A-15, A-82, or A-185, as appropriate.

[2] Water absorption and three-edge bearing tests shall conform to ASTM Specification C-497.

[3] Gaskets shall conform to Sections 3.3 and 3.4 of AWWA Specification C-302.

(2) Cast-iron pipe, extra-heavy.

(a) Pipe and fittings shall conform to the requirements of ASTM Specification A-74 or ANSI A-21.11.

(b) Gaskets shall conform to ASTM Specification C-564.

(3) Polyvinyl chloride (PVC) pipe, heavy wall.

(a) Pipe shall be made from Class 12454-B materials or better in accordance with ANSI/ASTM Specification D-1784.

(b) Pipe and accessories shall conform to the requirements of the following, with a minimum pipe stiffness of 46 PSI at a maximum deflection of 5%.

[1] ANSI/ASTM D-3034: four inches to 15 inches.

[2] ASTM F-679: 18 inches to 27 inches.

(4) Ductile-iron pipe.

(a) Pipe, fittings and specials shall be manufactured in accordance with ASTM Specification A-746. Pipe shall have a minimum thickness of Class 50.

(b) Fittings shall conform to ANSI Specification A-21.11 and have a minimum pressure class rating of 150 PSI.

(c) All pipe and fittings shall be cement-mortar-lined in accordance with ANSI Specification A=21.4 at twice the specified thickness and have an internal and external bituminous seal coating.

(d) Closure pieces shall be jointed by means of a mechanical coupling of the cast sleeve type.

(5) Vitrified-clay pipe, extra-strength. (Note that standard strength verified clay pipe shall not be used.) Pipe shall conform to the current requirements of NCPI Specification ER 3300-67 and meet the requirements of ASTM Specification C-700.

(6) Acrylonitrile-butadiene-styrene (ABS) pipe. Pipe and fittings shall conform to the requirements of ASTM Specification D-2661.

(7) Other pipe materials. Other pipe materials require prior written approval of the Wastewater Treatment Operator before being installed.[1]

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

B. Other requirements.

(1) The minimum internal pipe diameter shall be eight inches.

(2) Joints for the selected pipe shall be designed and manufactured such that O-ring gaskets of the snap-on type are used.

(3) Gaskets shall be continuous, solid, natural or synthetic rubber and shall provide a positive compression seal in the assembled joint, such that the requirements of § 230-25 are met.

(4) Joint preparation and assembly shall be in accordance with the manufacturer's recommendations.

(5) Wye branch fittings shall be installed, for connection of street laterals, in accordance with § 230-34.

C. Safety and load factors.

(1) Selection of pipe class shall be predicated on the following criteria:

(a) Safety factor: 1.5.

(b) Load factor: 1.7.

(c) Weight of soil: 120 pounds per cubic foot.

(d) Wheel loading: 16,000 pounds.

(2) Utilizing the foregoing information, design shall be made as outlined in Chapter IX of the Water Pollution Control Federation Manual of Practice No. 9, latest edition, Design and Construction of Sanitary and Storm Sewers, and the pipe shall have sufficient structural strength to support all loads to be placed on the pipe with a safety factor as specified above.

D. Sewer pipe installation.

(1) Local utilities shall be contacted to verify construction plans and to make arrangements to disconnect all utility services, where required to undertake the construction work. The utility services shall later be reconnected. The work shall be scheduled so that there is minimum inconvenience to local residents. Residents shall be provided proper and timely notice regarding disconnection of utilities.

(2) The construction right-of-way shall be cleared only to the extent needed for construction. Clearing consists of removal of trees which interfere with construction, removal of underbrush, logs and stumps and other organic matter, removal of refuse, garbage and trash, removal of ice and snow and removal of telephone and power poles and posts. Any tree which will not hinder construction shall not be removed and shall be protected from damage by any construction equipment. Debris shall not be burned, but hauled for disposal in an approved manner.

(3) The public shall be protected from personal and property damage as a result of the construction work.

(4) Traffic shall be maintained at all times in accordance with applicable highway permits. Where no highway permits are required, at least one-half (1/2) of a street shall be kept open for traffic flow.

(5) Erosion control shall be performed throughout the project to minimize the erosion of soils into lands adjacent to or affected by the work. Erosion control can be effected by limiting the amount of clearing and grubbing prior to trenching, proper scheduling of the pipe installation work, minimizing time of open trench, prompt grading and seeding and filtration of drainage.

(6) The trench shall be excavated only wide enough for proper installation of the sewer pipe, manhole and appurtenances. Allowances may be made for sheeting, dewatering and other similar actions to complete the work.

(7) Under ordinary conditions, excavation shall be by open cut from the ground surface. However, tunnelling or boring under structures other than buildings may be permitted. Such structures include crosswalks, curbs, gutters, pavements, trees, driveways and railroad tracks.

(8) Open trenches shall be protected at all hours of the day with barricades, as required.

(9) Trenches shall not be open for more than 30 feet in advance of pipe installation nor left unfilled for more than 30 feet in the rear of the installed pipe, when the work is in progress, without permission of the Wastewater Treatment Operator. When work is not in progress, including overnight, weekends and holidays, the trench shall be backfilled to ground surface.[2]

[2] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

(10) The trench shall be excavated approximately six inches deeper than the final pipe grade. When unsuitable soils are encountered, these shall be excavated and replaced with select materials.

(11) Ledge rock, boulders and large stones shall be removed from the trench sides and bottom. The trench shall be overexcavated at least 12 inches for five feet, at the transition from rock bottom to earth bottom, centered on the transition.

(12) Maintenance of grade, elevation and alignment shall be done by some suitable method or combination of methods.

(13) No structure shall be undercut unless specifically approved by the Wastewater Treatment Operator.[3]

[3] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

(14) Proper devices shall be provided, and maintained operational at all times, to remove all water from the trench as it enters. At no time shall the sewer line be used for removal of water from, the trench.

(15) To protect workers and to prevent caving, shoring and sheeting shall be used, as needed. Caving shall not be used to backfill the trench. Sheeting shall not be removed but cut off no lower than one foot above the pipe crown nor no higher than one foot below final grade, and left in the trench, during backfill operations.

(16) The pipe barrel shall be supported along its entire length on a minimum of six inches of crusher run max, one-half (1/2) inch stone. This foundation shall be firmly tamped in the excavation.

(17) Bell holes shall be hand excavated, as appropriate.

(18) Pipe shall be laid from low elevation to high elevation. The pipe bell shall be up-gradient; the pipe spigot shall be down-gradient.

(19) The joints shall be made and the grade and alignment checked and made correct.

(20) Crushed stone shall be placed over the laid pipe to a depth of at least six inches. Care shall be exercised so that stone is packed under the pipe haunches. Care shall be exercised so that the pipe is not moved during placement of the crushed stone.

(21) The pipe shall be in straight alignment.

(22) The remaining portion of the trench above the pipe embedment shall be backfilled in foot lifts which shall be firmly compacted. Compaction near or under roadways, driveways, sidewalks and other structures shall be to 95% of the maximum moisture-density relationship, as determined by ASTM Specification D-698, Method D.

E. Manhole installation.

(1) Manholes shall be placed where there is a change in slope or alignment and at intervals not exceeding 400 linear feet.

(2) Manhole bases shall be constructed of three-thousand-pounds-per-square-inch (seven-day) concrete 12 inches thick or shall be precast bases properly bedded in the excavation. Field-constructed bases shall be properly reinforced.

(3) Manhole walls shall be constructed using precast minimum four-foot diameter concrete manhole barrel sections and an eccentric top section, conforming to ASTM Specification C-478. All sections shall be cast solid, without lifting holes.

(4) All joints between sections shall be sealed with an O-ring rubber gasket, meeting the same specifications as pipe joint gaskets.

(5) All joints shall be sealed against infiltration.

(6) No steps or ladder rungs shall be in the manhole walls.

(7) All precast sections shall be produced at a plant which is approved by the NYSDOT for manufacture of concrete pipe.

(8) The elevation of the top section shall be such that the cover frame top elevation is zero and five-tenths (0.5) foot above the one-hundred-year flood elevation (in a field) zero and five-tenths (0.5) foot above a lawn elevation or at finished road grade.

(9) The manhole frame and cover shall be heavy-duty cast iron. The cover shall be 24 inches in diameter. The minimum combined weight of the frame and the cover shall be 400 pounds. The mating surfaces shall be machined and painted with tar pitch varnish. Covers shall have "Sanitary Sewer" cast into them. Covers shall have two pick holes 180° apart. The pick holes shall be designed so that infiltration is prevented.

(10) Benches shall be level and slope to the flow channel at about one inch per foot.

(11) The minimum depth of the flow channel shall be the nominal diameter of the larger pipe. The channel shall have a steel towel finish.

(12) Manhole frames shall be set in a full bed of mortar with no less than two nor more than nine courses of brick underneath to allow for later elevation adjustment.

§ 230-25 Testing.

A. Infiltration/exfiltration testing. All sanitary sewers or extensions to sanitary sewers, including manholes, shall satisfy requirements of a final infiltration test before they will be approved and wastewater flow permitted by the Village of Oxford. The infiltration rate shall not exceed 100 gallons per 24 hours per mile per nominal diameter in inches. An exfiltration test may be substituted for the infiltration test; the same rate shall not be exceeded. The exfiltration test shall be performed by the applicant, under the supervision of the Wastewater Treatment Operator, who shall have the responsibility for making the proper and accurate measurements required. The exfiltration test consists of filling the pipe with water to provide a head of at least five feet above the top of the pipe or five feet above groundwater, whichever is higher, at the highest point under test, and then measuring the loss of water, from the pipe section under test, by the amount of water which must be added to maintain the original level. In this test, the test section must remain filled with water for at least 24 hours prior to taking any measurements. Exfiltration shall be measured by the drop of water level in a standpipe with closed bottom end or in one of the sewer manholes serving the test section. When a standpipe and plug arrangement is used in the upper manhole in the test section, there shall be some positive method for releasing entrapped air prior to taking any measurements.[1]

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

B. Test section. The test section shall be as ordered or as approved, but in no event longer than 1,000 feet. In the case of sewers laid on steep grades, the test length may be limited by the maximum allowable internal pressure on the pipe and joints at the lower end of the test section. For purposes of determining the leakage rate of the test section, manholes shall be considered as sections of forty-eight-inch diameter pipe, five feet long. The maximum allowable leakage rate for such a section is 4.5 gallons per 24 hours. If leakage exceeds the allowable rate, then necessary repairs or replacements shall be made and the section retested.

C. Test period. The test period, during which the test measurements are taken, shall not be less than two hours.

D. Pipe lamping. Prior to testing, the section shall be lamped. Any joint of straight alignment shall be realigned.

E. Air testing alternative.

(1) In lieu of hydrostatic testing (exfiltration or infiltration), air testing may be employed. Low pressure air tests shall conform to ASTM Specification C-828. All sections to be tested shall be cleaned and flushed and shall have been backfilled prior to testing.

(2) The air test shall be based on the time measured in seconds, for the air pressure to drop from 3.5 PSI to 2.5 PSI. Acceptance is based on limits stated in ASTM Specification C-828. Before pressure is applied to the line all connections shall be firmly plugged. Before the test period starts the air shall be given sufficient time to cool to ambient temperature.

(3) If the test section is below groundwater, the test pressure shall be increased an amount sufficient to compensate for groundwater hydrostatic pressure; however, the test pressure shall not exceed (10) PSI.

(4) The test gauge shall have been recently calibrated, and a copy of the calibration results shall be made available to the Wastewater Treatment Operator prior to testing.[2]

[2] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

§ 230-26 Final acceptance; guaranties. [1]

All sanitary sewers and extensions to sanitary sewers constructed at the applicant's expense, after final approval and acceptance by the Wastewater Treatment Operator, and concurrence by the Village of Oxford Board, shall become the property of the Village of Oxford and shall thereafter be operated and maintained by the Village of Oxford. Said sewers, after their acceptance by the Village of Oxford, shall be guaranteed against defects in materials or workmanship for one year by the applicant. The guaranty shall be in such form and contain such provision as deemed necessary by the Village of Oxford Board, secured by a surety bond or such other security as the Village of Oxford Board may approve.

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

§ 230-27 Approved wastewater disposal required for building permit.

No property owner, builder or developer shall be issued a building permit for a new dwelling or structure requiring sanitary facilities unless a suitable and approved method of wastewater disposal, conforming to this chapter, is available. All housing construction or building development which takes place after this chapter is enacted shall provide for an approved system of sanitary sewers.

§ 230-28 Liability insurance coverage during construction period.

A. All contractors engaged in connecting laterals with sanitary sewers and who perform any work within the right-of-way of any highway, shall file a bond in the amount of $5,000 with the Village of Oxford Clerk to indemnify the Village of Oxford against any and all losses, cost, damages or expenses sustained or recovered on account of negligence, omissions or acts of such contractor arising or resulting, directly or indirectly, by reason of any consent or of any act, construction or excavation done, made or permitted under authority of such permit or consent. All bonds shall contain a clause providing that permits given by the Village of Oxford Board may be revoked at any time for just cause.

B. [1] Before commencing work, the contractor shall obtain and file with the Village of Oxford Clerk insurance certificates for the following:

(1) Public liability insurance limited to $500,000 for injuries and including wrongful death to each person and limited to $1,000,000 on account of each occurrence.[2]

[2] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

(2) Property damage insurance for $1,000,000 for damages on account of any occurrence and $3,000,000 aggregate.

[1] Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.

C. The policies shall cover the operation of motor vehicles and the use of explosives and blasting. All insurance policies must provide for five days' notice to the Board before cancellation and must cover all liabilities of the Village of Oxford Board and be in a form satisfactory to the Board.

D. Where it is necessary to enter upon or excavate any highway or cut any pavement, sidewalk or curbing, permission must be obtained from the Superintendent of the Village Department of Public Works if a Village of Oxford roadway is involved, from the County Department of Public Works if a county highway is involved and the New York State Department of Transportation if a state highway is involved.