The following work shall be included:
A. 
Furnishing pipe for water main extensions.
B. 
Furnishing miscellaneous appurtenances.
C. 
Installation.
D. 
Testing.
The following reference standards shall apply:
A. 
ANSI A21.4/AWWA C104, Cement Mortar Lining for Ductile Iron and Gray Iron Pipe and Fittings for Water.
B. 
ANSI A21.10/AWWA C110, Gray Iron and Ductile Iron Fittings, three inches through 48 inches, for Water and Other Liquids.
C. 
ANSI A21.11/AWWA C111, Rubber Gasket Joints for Ductile Iron and Gray Iron Pressure Pipe and Fittings.
D. 
ANSI A21.51/AWWA C151, Ductile Iron Pipe.
E. 
ANSI B.16, Cast Iron Pipe Flanges and Flanged Fittings, Class 25, 125, 250 and 800.
F. 
ASTM D2241, Polyvinyl Chloride (PVC) Plastic Pipe (SDR-PR).
G. 
ASTM D2321, Underground Installation of Flexible Thermoplastic Sewer Pipe.
H. 
ASTM A126, Gray Iron Castings for Valves, Flanges and Pipe Fittings.
I. 
ASTM B62, Composition Bronze or Ounce Metal Castings.
J. 
AWWA C502, Dry Barrel Fire Hydrants.
K. 
AWWA C600, Installation of Cast Iron Water Mains.
L. 
AWWA C601, Disinfecting Water Main.
M. 
AWWA C150, Thickness Design for Ductile Iron Pipe.
N. 
AWWA C504, Rubber Seated Butterfly Valves.
O. 
AWWA C500, Gate Valves, 3-inch through 48-inch.
P. 
AWWA C509, Resilient-Seated Gate Valves.
Q. 
AWWA C900, Polyvinyl Chloride Pressure Pipe, 4-inch through 12-inch for water.
R. 
AWWA C550, Protective Interior Coatings for Valves and Hydrants.
Shop drawings for all products and materials shall be submitted as directed by the Superintendent.
A. 
All pipe and fittings shall be inspected and tested at the foundry as required by the standard specifications to which the material is manufactured. The contractor shall furnish in duplicate to the Water Superintendent and/or his representative sworn certificates of such tests.
B. 
In addition, the owner reserves the right to have any or all pipe, fittings and special casting inspected and/or tested by an independent service at either the manufacturer's plant or elsewhere. Such inspection and/or tests shall be at the owner's expense.
C. 
Pipes and fittings shall be subjected to a careful inspection and a hammer test just before being laid or installed.
A. 
All products included in this article shall conform to the requirements of the standard specifications referenced herein.
B. 
Pipe size shall be as shown on the drawings.[1]
[1]
Editor's Note: The drawings are located at the end of this chapter.
C. 
All pipe materials and methods of jointing shall be as shown on the drawings.
A. 
Ductile iron pipe. Pipe shall be designed in accordance with AWWA C150 and shall conform to ANSI A21.51/AWWA C151, Class 52, and shall have push-on joints except that pipe installed in vaults shall have flanged ends conforming to ANSI B16.1. Pipe shall be double cement lined with seal coat inside and out, conforming to ANSI A21.4/AWWA C104. Push-on joints and rubber gaskets shall be in accordance with ANSI A21.11/AWWA C111.
B. 
Pipe fittings.
(1) 
Fittings shall be cast iron, 250 pounds per square inch pressure rating, or ductile iron, 350 pounds per square inch pressure rating, conforming to ANSI A21.10/AWWA C110 with mechanical joints. Compact ductile iron fittings conforming to ANSI A21.53/AWWA C153 will be acceptable. Joints and gaskets shall conform to ANSI 21.11/AWWA C111. Joints shall be furnished with ductile iron follower glands. Fittings shall be double cement lined and seal coated inside and out in accordance with ANSI A21.4/AWWA C104. Tees for hydrant branches and for stubs for future use shall have mechanical joints on the run with a plain end having an integral rotating gland on the branch. The gland will anchor mechanical joint pipe or valve ends to the plain end of the tee.
C. 
All ductile and cast-iron pipe and fittings shall be clean, sound and without defects. The castings shall be smooth and free from pinholes, excess iron, etc. The coatings shall be continuous, smooth and neither brittle nor sticky.
D. 
The pipe manufacturer shall supply the engineer with certificates of compliance with these specifications and certification that each piece of ductile iron pipe has been tested at the foundry with the ball impression test, ring bending or other approved test for ductility.
A. 
Resilient seated gate valves.
(1) 
Resilient seated gate valves shall be manufactured to meet or exceed the requirements of AWWA C-509 or latest revision. Valves shall have an unobstructed waterway when fully opened equal in diameter to at least 1/4 inch greater than the nominal valve size. Valves shall have mechanical joint end.
(2) 
All internal surfaces shall be coated with epoxy to a minimum thickness of 10 mils. Said coating shall be nontoxic, impart no taste to water and shall conform to AWWA C-550 or latest revision.
(3) 
Valves shall be provided with two O-ring stem seals. Both O-rings shall be located above the thrust collar. The sealing mechanism shall provide a dual seal with zero leakage at the water working pressure when installed with the line flow in either direction and shall consist of a cast-iron gate having a vulcanized synthetic rubber coating with no rubber metal seams or edges in the waterway when in the fully closed position.
(4) 
All valves shall be seat tested at the rated working pressure in accordance with Section 6 of AWWA C-509. Valve shall be rated at 200 psi working pressure and 400 psi test pressure.
(5) 
Valves shall be open left. The owner has standardized on resilient seated gate valve manufactured bye M & H or Mueller Co. The contractor shall use the same.
B. 
Butterfly valves.
(1) 
All butterfly valves shall be of the rubber-seated tight-closing type and shall meet or exceed AWWA Specification C-504-70, with latest revisions. Valves shall be designed for underground service.
(2) 
Valves shall have mechanical joints ends. Standard M.J. accessories are also to be provided.
(3) 
Valve shall be equipped with a two-inch AWWA operating nut and shall open as specified below.
(4) 
All valves shall be rated at 200 per square inch minimum working pressure and hydrostatically tested at 300 pounds per square inch.
(5) 
All valves shall have thermosetting epoxy coating on the exterior and on the interior and the vane. The coating shall meet all requirements of AWWA C-550 or latest revision. All bodies and vanes shall be factory coated prior to assembly and tested. All ferrous surfaces of the valve body waterway and vane shall receive an epoxy coating with a minimum dry film thickness of eight mils. All exterior surfaces shall be coated with asphalt varnish.
(6) 
Valves shall open left. The owner has standardized on Mueller or M&H Butterfly Valves. The contractor shall use the same.
C. 
Valve boxes.
(1) 
Valve boxes shall be furnished for all valves and shall be made in the United States, Canada or approved equal. Shop drawings will be required for approval before delivery.
(2) 
Valve boxes shall be standard cast iron, asphalt coated, adjustable, sliding type, together with cast-iron covers with the word "water" plainly cast in relief on the top surface.
(3) 
The bottom section shall have a minimum internal diameter of 5 1/4 inches. The top section shall have a minimum diameter of 6 1/8 inches. There shall be a minimum six-inch overlap between sections.
(4) 
The bottom section shall be 48 inches in length for all butterfly valves and 36 inches in length for all gate valves. The top section shall be at least 26 inches in length and have a plain bottom. No three-piece combinations shall be acceptable.
(5) 
Valve boxes shall be completely and thoroughly coated with bitumastic paint.
A. 
Hydrants shall conform to the requirements of AWWA C-502 and be designed for 150 pounds per square inch working pressure tested to 300 pounds per square inch hydrostatic. Hydrants shall have a six-inch mechanical joint shoe, five-and-one-fourth-inch valve opening and six-foot bury, open left with two two-and-one-half-inch hose nozzles and one four-and-one-half-inch pumper connection, National Standard threads, operating nut and nozzle cap with non-kink safety chains.
B. 
Hydrants shall be the compression type, closing with the pressure. They shall be traffic model with safety flange and stem couplings.
C. 
Hydrants shall be able to be rotated 360°. They shall have a positive closing and self-cleaning drain valve, and drainage area shall be completely bronze or brass lined.
D. 
The owner has standardized on Mueller Centurion or AVK. The contractor shall therefore use the same.
E. 
Hydrants shall be painted yellow to match Town's standard color.
A. 
Corporation stops shall be brass compression-type with Mueller thread. Corporations shall be supplied with pack-joint quarter bends where required. Stops shall be Mueller Co., Mark II Oriseal.
B. 
Tubing for services and chlorine injection points shall be Type K annealed seamless copper designed for buried water service. The name or trademark of the manufacturer and type shall be stamped at intervals along the pipe.
C. 
Tubing for services and chlorine injection points shall be polyethylene designed for 160 pounds per square inch service. Pipe shall be in accordance with AWWA C901 standard for polyethylene pressure pipe, tubing and fittings.
D. 
Adapter couplings may be required for fitting new services to existing service lines. Such fittings shall be compression connections and provide electrical continuity.
E. 
Couplings shall be comprised of ductile iron and shall be solid sleeve (long lay length) or Hymax or approved equal.
A. 
Pipe and accessories shall be handled and stored in such a manner as to ensure that pipe is installed in sound, undamaged condition. Particular care shall be taken not to injure the pipe coating or lining.
B. 
Ductile iron pipe and fittings and the cement linings are comparatively brittle. Every care shall be taken in handling and laying pipe and fittings to avoid damaging the pipe or lining, scratching or marring machined surfaces and abrasion of the pipe coating or lining.
C. 
Any pipe showing a distinct crack with no evidence of incipient fracture beyond the limits of the visible crack, if approved, may have the cracked portion cut off by, and at the expense of, the contractor before the pipe is laid so that the pipe used is perfectly sound. The cut shall be made in the sound barrel at a point at least 12 inches from the visible limits of the crack.
D. 
If authorized, cutting of the pipe shall be done so that the cut is square and clean, without causing damage to the pipe lining. Unless otherwise authorized by the engineer, all pipe cutting shall be done by means of an approved type of power cutter. The use of hammer and chisel, or any other method which results in rough edges, chips and damaged pipe, is prohibited. All cut edges shall be field beveled by use of a power grinder, as required, prior to installation.
E. 
Each pipe section shall be placed into position in the trench in such manner and by such means required to cause no damage to the pipe, person or to property.
F. 
The contractor shall furnish slings, straps and/or approved devices to provide satisfactory support of the pipe when it is lifted. Transportation from delivery areas to the trench shall be restricted to operations which can cause no damage to the pipe units.
G. 
Pipe shall not be dropped from trucks onto the ground or into the trench.
H. 
The contractor shall have on the job site, with each laying crew, all the proper tools to handle and cut the pipe.
I. 
Damaged pipe coating and/or lining shall be restored before installation only as approved or directed by the engineer.
A. 
The engineer has shown easement and property and other control lines necessary for locating the work as well as elevations and benchmarks used in the design of the work on the drawings.[1]
[1]
Editor's Note: The drawings are located at the end of this chapter.
B. 
The contractor shall use this information to set line and use a surveyor's level or transit to set grade as required.
C. 
The use of string levels, hand levels, carpenter's levels or other curved devices for transferring grade or setting pipe are not permitted.
D. 
During construction, the contractor shall provide the engineer, at his request, all reasonable and necessary materials, opportunities and assistance for setting stakes and making measurements, including the furnishing of one or two rod men or chain men as needed at intermittent times. He shall not proceed until he has made timely request of the engineer for, and has received from him, such controls and instructions as may be necessary for the work to progress. The work shall then be done in strict conformity with such controls and instructions. The contractor shall carefully preserve benchmarks, reference points and stakes, and, in case of willful or careless destruction by his own men, he will be charged with the resulting expense and shall be responsible for any mistakes or delay that may be caused by their unnecessary loss or disturbance.
A. 
As soon as excavation has been completed to required depth, bedding material shall be placed and compacted to the elevation necessary to bring the pipe to grade as specified in Section 02220.
B. 
The compacted bed shall be rounded so that at least the bottom quadrant of the pipe shall rest firmly for the full length of the barrel. Suitable holes for bells or couplings shall be dug around the pipe joints to provide ample space for making tight joints.
C. 
The trench bottom shall be straight, free of bumps or hollows and at the proper depth. Any irregularities in the trench bottom shall be leveled off or filled in with a selected gravel or sand thoroughly tamped.
D. 
If determined by the engineer, the trench bottom shall be prepared by digging at least six inches deeper than pipe grade and backfilling to proper grade with a selected gravel or sand backfill properly tamped.
E. 
All unsuitable material shall be removed from the bottom of the trench excavation as directed by the engineer to the depths ordered. The trench shall be backfilled with an approved gravel backfill material, placed in six-inch layers, to within six inches of proper pipe grade. Each gravel lift shall be thoroughly tamped. A six-inch layer of selected gravel or sand shall be placed and tamped for proper pipe support.
A. 
Laying of pipe and fittings shall be in accordance with the requirements of AWWA Standard Specifications for Installation of Cast-Iron Water Mains, C600, except as otherwise provided herein.
B. 
Each pipe length shall be inspected for cracks, defects in coating or lining and any other evidences of unsuitability. The contractor shall excavate a minimum amount of trench and shall backfill trench to within two lengths of pipelaying. All trenches shall be backfilled at night unless otherwise approved by the Water Superintendent and/or his representative.
C. 
Pipe shall be laid in the dry and at no time shall water in the trench be permitted to flow into the pipe.
D. 
The pipe shall then be laid on the trench bedding, and the pipe pushed home. Jointing shall be in accordance with the manufacturer's instructions and appropriate ASTM standards, and the contractor shall have on hand for each pipelaying crew the necessary tools, gauges, pipe cutters, etc., necessary to install the pipe in a workmanlike manner. Pipelaying shall proceed upgrade with spigot ends pointing in the direction of flow.
E. 
Blocking under the pipe will not be permitted except where a concrete cradle is proposed, in which case precast concrete blocks shall be used.
F. 
If inspection of the pipe indicates that the pipe has been properly installed as determined by the Water Superintendent and/or his representative, the contractor may then refill or backfill the remainder of the trench in accordance with the specifications.
G. 
At any time that work is not in progress, the end of the pipe shall have a temporary plug to prevent the entry of animals, earth, water, etc.
H. 
Acceptable alignment shall be preserved in laying. The deflection at joints shall not exceed 3°, or 12 inches for an eighteen-foot length of pipe. Fittings, in addition to those shown on the drawings,[1] shall be provided, if required, in crossing utilities which may be encountered upon opening the trench. Solid sleeves shall be used only where approved by the Water Superintendent and/or his representative.
[1]
Editor's Note: The drawings are located at the end of this chapter.
I. 
Concrete thrust blocks shall be installed at all fittings and other locations as directed by the engineer. Minimum bearing area shall be as shown on the drawings.[2] Joints must be protected by felt roofing paper prior to placing concrete. Concrete shall be placed against undisturbed material and shall not cover joints, bolts or nuts or interfere with the removal of any joint. Wooden side forms shall be provided for thrust blocks.
[2]
Editor's Note: The drawings are located at the end of this chapter.
J. 
Push-on joints shall be connected in strict accordance with the manufacturer's instructions. Pipe shall be laid with bell ends on the upstream side. A rubber gasket shall be inserted in the groove of the bell end of the pipe and joint surfaces cleaned and lubricated. The plain end of the pipe to be entered shall then be inserted in alignment with the bell of the pipe to which it is to be jointed and pushed home with a jack or by other means. After jointing the pipe, a metal feeler shall be used to make certain that the rubber gasket is located correctly.
K. 
Mechanical joints at valves, fittings and where designated shall be in accordance with the Notes on Method of Installation under ANSI Specification A21.11 and the instruction of the manufacturer. To assemble the joints in the field, the contractor shall thoroughly clean the joint surfaces and rubber gasket with soapy water before tightening the bolts. Bolts shall be tight to the specified torques. Under no conditions shall extension wrenches or pipe over handle or ordinary ratchet wrench be used to secure greater leverage.
L. 
Field-Lok gaskets shall be installed after any mechanical fitting where there is a change in the direction of flow or as determined by the Water Superintendent and/or his representative.
[Added 10-24-2006]
A. 
Valves and boxes shall be set with the stem vertical and box vertically centered over operating nut. Valves shall be set on a firm foundation and supported by tamping selected excavated material under and at the sides of the valve. The gate box shall be supported during backfilling and maintained in vertical alignment with the top flush with finish grade.
B. 
Valves shall be anchored to all tees or fittings with three-fourths-inch threaded rods, wherever possible or as directed by the Water Superintendent and/or his representative.
C. 
Couplings and fittings shall be installed in accordance with manufacturer's instructions.
Hydrants shall be set at the location shown and bedded on a firm foundation. A drainage pit three feet in diameter and two feet deep below and to the rear of the hydrant shall be filled with crushed stone and satisfactorily compacted. During backfilling, additional pea stone shall be brought up around and six inches over the drain port. Where directed by the engineer, the contractor shall install plugs in the hydrant drain ports. No hydrant shall be backfilled until contractor is directed to do so by the Water Superintendent and/or his representative. Each hydrant shall be set in true vertical alignment and properly braced. Concrete thrust blocks shall be placed between the back of the hydrant inlet and undisturbed soil at the end of the trench. All hydrants shall be rodded to the gate valves using three-fourth-inch threaded rod and duclugs. Minimum bearing area shall be as shown on the drawings.[1] Roofing felt shall be placed around hydrant elbow before placing concrete. Care shall be taken to ensure that concrete does not plug the drain ports.
[1]
Editor's Note: The drawings are located at the end of this chapter.
A. 
The tapping machine shall be rigidly fastened to the pipe halfway between the horizontal and vertical position. The length of travel of the tap should be so established that when the stop is inserted and tightened with a fourteen-inch wrench, not more than one to three threads will be exposed on the outside. When a wet tapping machine is used, the corporation stop shall be inserted with the machine while it is still in place. Stops shall be tightened only sufficiently to give water tightness, and care must be constantly exercised not to overtighten them.
B. 
Service saddles shall be installed as shown on the standard house connection detail and air release detail.[1] The manufacturer's recommended installation instructions shall be conformed to.
[1]
Editor's Note: The drawings are located at the end of this chapter.
C. 
Care shall be exercised in the placing and laying of tubing to be sure that the pipe does not have kinks or sharp stones or ledge which would cause damage to the pipe. At least six inches of sand shall be placed as shown on the drawings, adjacent to, above and below the tubing. No stone shall be dropped on the tubing until the depth of backfill above the tubing is in excess of one foot.
D. 
Connections shall be made of new services with existing services unless otherwise directed by the engineer. Bushings and/or couplings shall be used as required to connect new tubing with existing services.
A. 
Each gate box shall be installed vertically, centered over the operating key, with the elevation of the top adjusted to conform to the finished surface at the completion of the contract. The box shall be adequately supported during backfilling to maintain vertical alignment.
B. 
Installation of chlorination taps shall be in accordance with § 407-53, Installation of corporation and services. Service saddles must be used.
C. 
The exact location of the manual air releases will be determined in the field.
A. 
The contractor shall furnish all labor, pumps, taps, chemicals and other necessary equipment to conduct hydrostatic pressure tests and measured leakage test and to disinfect thoroughly the mains laid under this contract in accordance with Section 4, AWWA C600-82, Installation of Ductile Iron Water Main.
B. 
The tests and disinfection shall be conducted at a time specified by and under the supervision and direction of the engineer who shall judge the success or failure of the work to meet the required standards.
C. 
In the event that the work fails to meet the required standards as stated herein, the contractor shall perform such excavation, repair, relaying of pipe, rechlorinating and all other work necessary to correct the work and shall repeat the tests or chlorination as often as may be necessary and until such time as the required standards are met.
A. 
Before applying the specified test pressure, all air shall be expelled from the pipe. If suitable means of expelling air are not available at high places, the contractor shall make all the necessary taps as shown on plans or as the engineer may direct. After the tests have been completed, the corporation stops shall be left in place or removed and plugs inserted, as directed by the Water Superintendent and/or his representative or owner.
B. 
The newly laid pipe shall be tested in valved or plugged sections as determined by the Water Superintendent and/or his representative in the field. Water shall be slowly introduced into the section being tested by means of an approved power-driven high-pressure test pump.
C. 
The new laid pipeline shall be tested to a pressure equal to 150% of the maximum static pressure for the section being tested, measured at the lowest point of the section being tested corrected to the elevation of the test gauge. If the static pressure of any newly laid section of pipeline being tested is less than 100 pounds per square inch gauge measured at the lowest point of the pipeline section, then the minimum test pressure shall be 150 pounds per square inch gauge.
D. 
The pressure shall be raised to the test pressure required for each section being tested as determined by the engineer. When the test pressure is reached, the time shall be recorded and the test shall begin. The duration of each pressure test shall be a minimum of two hours. During the test, pressure shall be maintained in the section of pipeline being tested by means of a recirculating bypass-type test pump. Water shall be added in measured amounts from a container of known volume if required to maintain pressure. The addition of excessive amounts of water shall constitute immediate test failure. The Water Superintendent and/or his representative will approve all gauges and test equipment. In general all gauges shall be in two-pound increments.
E. 
During the test, the line will be examined by the engineer for visible leaks and breaks. Any defects in the works shall be repaired, and any defective materials shall be removed and replaced by the contractor as and where directed by the Water Superintendent and/or his representative.
A. 
Method of testing. The leakage test shall be conducted concurrently with the pressure test. "Leakage" shall be defined as the quantity of water that must be supplied into the newly laid pipe, or any valved section thereof, to maintain pressure within five pounds per square inch of the specified test pressure after the air in the pipeline has been expelled and the pipe has been filled with water. Leakage shall not be measured by a drop in pressure in a test section over a period of time.
B. 
No pipe installation will be accepted if the leakage is greater than that determined by the following formula, in which L is the allowable leakage, in gallons per hour; S is the length of pipe tested, in feet; D is the nominal diameter of the pipe, in inches; and P is the average test pressure during the leakage test, in pounds per square inch gauge.
[Amended 10-24-2006]
L
=
SDP
2
133,200
C. 
Allowable leakage at various pressures is shown in the following table.[1]
[1]
Editor's Note: Said table can be found at the end of this chapter.
D. 
When testing against closed metal-seated valves, an additional leakage per closed valve of 0.0078 gallon per hour per inch of nominal valve size shall be allowed.
E. 
When hydrants are in the test section, the test shall be made against the closed hydrant.
F. 
Acceptance shall be determined on the basis of allowable leakage. If any test of pipe laid discloses leakage greater than that specified, the contractor shall, at his own expense, locate and make repairs as necessary until the leakage is within the specified allowance.
G. 
All visible leaks are to be repaired regardless of the amount of leakage. At the end of the test period, if the amount of water added to the main from the calibrated vessel is less than the allowable leakage, and if the line shows no visible leaks or other failures, that portion of the main tested will be approved by the engineer.
A. 
All valves and hydrants shall be pressure tested during the main pipeline test. Hydrant gate valves shall remain open during the main pressure test. After the pipeline has been pressure tested and accepted, the hydrant gate valve shall be closed and the hydrant valve cracked open to release some pressure on the hydrant side of the gate valve. An acceptable test for each hydrant gate valve shall be no loss of pressure in the main line test pressure as each valve is closed.
B. 
All main line butterfly or gate valves and control valves on any intersecting side streets shall also be tested by the same procedures outlined above as far as practical. The Water Superintendent and/or his representative shall decide if it is impractical to test any one particular valve location. No pressure test shall be considered acceptable until all possible control valves have been tested to ensure proper closing and watertightness.
C. 
The contractor shall make any taps and furnish all necessary caps, plus, etc., as required in conjunction with testing. He shall also furnish a test pump, gauges and any other equipment required in conjunction with carrying on the hydrostatic tests. He shall at all times protect the new water mains and the existing water mains against the entrance of polluting material.
A. 
After satisfactory pressure and leakage tests have been made, before placing the newly laid mains in service, and when directed by the Water Superintendent and/or his representative, the contractor shall disinfect by chlorination.
B. 
Prior to chlorination, the mains shall be flushed to remove dirt and other foreign substances.
C. 
The mains shall be disinfected by the contractor under the supervision of the Water Superintendent and/or his representative. The contractor shall use a manually controlled, vacuum-type solution feed chlorinator using a mixture of water and an approved chlorine-bearing compound of known chlorine content, such as calcium hypochlorite. The chlorine shall be introduced into the main through a three-fourths-inch corporation stop installed approximately one foot upstream from the valve at the beginning of the job and shall be tested for residual chlorine at a three-fourths-inch corporation stop installed approximately one foot from the downstream valve at the end of the project.
D. 
Water from an approved source shall be introduced slowly into the main during the application of chlorine. The rate of chlorine mixture flow shall be in such proportion to the rate of water entering the pipe that the chlorine dose entering the mains shall be at least 50 parts per million. When the pipe line has been completely filled with treated water, the main shall be sealed off. Treated water shall be retained in the main for a period of at least 24 hours. At the end of the retention period, the chlorine residual at the extremities of the pipe and at other representative points shall be at least five parts per million.
E. 
Should the first treatment fail to meet the above requirements, the procedure shall be repeated until tests show that, in the opinion of the Water Superintendent and/or his representative, effective disinfection has been accomplished.
F. 
Following acceptance of the disinfection process, the chlorinated water shall be flushed from the newly laid main until such time as the replacement water throughout its entire length shall be equal in quality to that elsewhere in the system.
G. 
A representative water sample and/or multiple samples shall be collected of potable water now present in the new pipeline after flushing the chlorine from the new water main and then again within 24 hours of the initial collection and testing by the contractor under the supervision of the Water Superintendent and/or his representative. This sample shall be taken to a Massachusetts Department of Environmental Protection DEP-certified laboratory for a bacteria analysis. The cost associated with the collection and analysis of the sample shall be paid for by the contractor.
[Amended 10-24-2006]
H. 
Special disinfection procedures, such as soaking or swabbing, approved by the Water Superintendent and/or his representative shall be used in connections to existing mains and where the method outlined above is not practicable.
A. 
The contractor shall furnish all necessary labor, tools, joint materials, equipment, etc., to connect new water pipes to existing water pipes with the required proper fittings. Flexible transition couplings used to connect new water pipes to existing water pipes shall be as specified.
B. 
All connections shall be made at such time and in such a manner as to cause as little interruption in water service as possible.
C. 
Coordination of all such work shall be made with the engineer and owner, who shall be present when the work is done and shall operate all valves. The contractor shall notify the Water Superintendent and/or his representative 72 hours in advance of when he plans to connect into the existing water mains.
D. 
All materials, equipment and labor necessary for the connection of the new water mains to the existing water mains shall be accomplished as shown on the plans or as directed by the engineer and shall be considered subsidiary to the pipelaying items.
A. 
The contractor shall exercise caution to properly protect the existing sewer services and drain pipes from construction damage. It shall be the contractor's responsibility to demonstrate that all existing active sewer services and drains are functioning properly after the installation of the proposed water main to the satisfaction of the Water Superintendent and/or his representative.
B. 
Damage to existing drains and sewer services shall be repaired and/or replaced with materials of the same size as the existing service. Existing slopes and inverts shall be maintained. Pipe joints shall be made using suitable flexible couplings, approved by the Water Superintendent and/or his representative. Fernco couplings are an acceptable coupling for sewer service repair. The contractor shall use the same. Concrete mortar joints will not be accepted.
C. 
If damage occurs to existing house or business sewer services or storm drains and acceptable repairs are accomplished as outlined above, the contractor shall be required to adequately demonstrate to the Water Superintendent and/or his representative that the repaired service is functioning normally before any backfill material shall be allowed to be placed.