ITEM 660.9310--10 M - ALTER EXISTING SANITARY SEWER SERVICE by zxg15325

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									ITEM 660.9310--10 M - ALTER EXISTING SANITARY SEWER SERVICE CONNECTIONS

DESCRIPTION

Under this item, the Contractor shall modify the grade and/or alignment of the existing sanitary sewer service
connections. These sanitary sewer service connections may be active or they may be capped at their existing
terminus behind the existing curbline.

For those sanitary sewer service connections that are capped, the Contractor shall furnish and install 6 NPS
house connection pipe from the terminus of the existing 6 NPS house connection to a point beyond the new
curbline as shown on the plans or as directed by the Engineer. The new terminus shall be satisfactorily
plugged.

For those sanitary sewer service connections that are active, the Contractor shall replace the existing 5 NPS
diameter pipe at the existing terminus of the 6 NPS pipe to a point beyond the new curbline. This existing 5
NPS pipe shall be replaced with new 6 NPS pipe. The new 6 NPS diameter pipe shall be installed at
minimum pitch and it shall be reconnected to the existing 5 NPS house connection service. There may be
occasion, depending on the existing configuration of the service connections, that additional new 5 NPS pipe
will be required to reconnect to the existing 5 NPS service. For clarification, see sanitary sewer work details
on the contract drawings.

The work in general includes all necessary alterations in the alignment and grade of the existing sewer service
connection, as required, and restoring the facility complete, in satisfactory operation.

The Contractor shall carefully uncover, protect and maintain existing service connections encountered in the
excavation. The Engineer will determine the nature and extent of the alterations required in the service
connection. The Contractor shall perform all necessary alterations to the service connection complete, as
required and directed, to satisfy the conditions encountered. He shall remove existing pipe and shall relocate,
replace, install, adjust position and reconnect the service line as necessary to establish the connection in final
position at the new lines and grades to the satisfaction of the Engineer. All work must be performed,
progressed and completed in such manner as will cause the absolute minimum of interruption to service and
inconvenience to the user. The Contractor shall provide temporary connections when service is interrupted,
when required, as directed by the Engineer. The Contractor shall notify the user sufficiently in advance when
service is interrupted.

MATERIALS

A.      Pipe Options

        1.       All house connection pipes shall be a minimum six (6) NPS diameter.

        2.       In general, house connection pipe and fittings shall be either Vitrified Clay Pipe (VCP),
                 Polyvinyl Chloride Pipe (PVC) or Ductile Iron Pipe (DIP).

        3.       When pressure pipe is specified or ordered by the Engineer, the Contractor shall have the
                 option, unless a specific type of pipe is required, of furnishing and installing either Ductile
                 Iron Pipe (DIP) or Polyvinyl Chloride Pressure pipe (PVCP).

        4.       Where the depth of cover over the pipe is less than 1.2 meters, all pipe shall be DIP or
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            PVCP. PVCP shall not be used if the depth of cover over the pipe is less than 760
            millimeters. PVC and VCP shall be not used if the cover over the pipe is less than 1.2
            meters.

B.   Shop Drawings

     1.     Shop drawings shall be submitted for all pipe, pipe fittings, couplings and adaptors to the
            Engineer for review and approval.

C.   Materials

     1.     All pipe, fittings, joints and incidentals shall conform to the following requirements:

            a.       Where two different types of pipe are joined, a duplex coupling or adaptor of an
                     approved type shall be used to couple the pipe. The coupling shall include a
                     stainless steel sheer ring and transition bushing, as required.

            b.       Where house connection piping passes near water supply wells, streams or under
                     water mains, pressure pipe may be required in lieu of sewer pipe. Where pressure
                     pipe is shown on the plans or specified or ordered by the Engineer, the Contractor
                     shall have the option, unless a specific type of pipe is required, of furnishing and
                     installing either Ductile Iron Pipe (DIP) or Polyvinyl Chloride Pressure pipe
                     (PVCP).

            c.       House connections on sewers constructed of pressure pipe shall also be constructed
                     of pressure pipe.

            d.       Ductile iron pipe shall be required for sewers and house connections which pass
                     through or under structures. Ductile iron pipe shall also be required where the
                     clearance between the top of the sewer or house connection pipe and the bottom of a
                     storm drain pipe is less than 460 millimeters, or in other locations where the
                     Engineer determines that additional pipe strength is required.

            e.       Identification of Pipe

                     (i)     All pipe delivered to the job shall be clearly marked at the factory with the
                             size, type, class of pipe, lot number, date of manufacture, and the
                             manufacturer=s identification. Additional markings as required by ASTM
                             Specifications for each pipe shall be included.

                     (ii)    Each coupling, fitting and special shall be similarly marked by the
                             manufacturer and also marked with the size and class of pipe with which it
                             is to be used.

                     (iii)   Omission of the above information may be cause for rejection of the pipe.

            f.       Manufacturer=s Testing - General
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                       (i)     Each manufacturer furnishing pipe under these specifications must provide
                               certifications, acceptable to the Engineer, that all pipe provided conforms to
                               the appropriate ASTM standards and specifications outlined herein.

            g.         Manufacturer's Testing - Vitrified Clay Pipe (VCP)

                       (i)     Vitrified clay pipe, fittings and specials shall be tested in accordance with
                               ASTM C301, except that the crushing strengths shall conform to NCPI ER-
                               4 and absorption shall not exceed six (6) percent.

                       (ii)    Crushing strength and absorption tests shall be made for each size and class
                               of pipe furnished. Acid resistance tests shall be made when directed by the
                               Engineer.

            h.         Manufacturer's Testing - Polyvinyl Chloride Pipe (PVC and PVCP)

                       (i)     Polyvinyl chloride pipe, fittings and specials shall be tested in accordance
                               with ASTM D3034, D2444 and D2412. Polyvinyl chloride pressure pipe
                               shall be tested in accordance with ASTM D2241.

                       (ii)    Pipe flattening, impact resistance, and pipe stiffness tests shall be made for
                               each size of PVC pipe furnished. The minimum "pipe stiffness" at five (5)
                               percent deflection shall be forty-six (46) for all sizes when tested in
                               accordance with ASTM D2412.

                       (iii)   Pipe flattening tests shall be made for each size of PVCP size furnished.

D.   Vitrified Clay Pipe (VCP)

     1.     Pipe

            a.         The vitrified clay pipe and fittings furnished and installed for sanitary sewers shall
                       be either glazed or unglazed pipe at the Contractor's option except that all pipe and
                       fittings used shall be of the same type and manufacture unless otherwise approved in
                       writing by the Engineer.

            b.         Full diameter extra strength glazed and unglazed pipe shall be used throughout and
                       shall conform to ASTM C700 except that the crushing strengths shall conform to
                       NCPI ER-4 and absorption shall not exceed six (6) percent. Class 3300 vitrified
                       clay pipe shall conform to NCPI ER-3300.

            c.         All pipe shall be bell and spigot pattern, first quality, free from fractures, large or
                       deep cracks, and blisters, laminations, and surface roughness.

     2.     Fittings

            a.         All fittings and specials shall be manufactured to the same standards as used for the
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                       pipe. They shall be furnished in the same quality and strength class as the particular
                       pipe with which it is used.

     3.       Joints and Joint Material

              a.       All joints for vitrified clay sewer pipe shall be made with materials having resilient
                       properties unless otherwise approved in writing by the Engineer. The jointing
                       connections of these materials shall be factory fabricated. Joints shall conform to
                       ASTM C425.

              b.       The Engineer reserves the right to require the Contractor to change the type of joint
                       or joint compound initially used in case the initial installation of piping with any
                       given joint or joint compound does not maintain water tightness upon visual
                       inspection by the Engineer.

              c.       Joints shall be tested in accordance with the requirements of ASTM C425.

     4.       Pipe Strength

              a.       The strength classification and any special bedding requirements for vitrified clay
                       pipe (VCP) shall be as shown in the following table:

          VITRIFIED CLAY PIPE REQUIRED STRENGTH


          Pipe Size NPS Trench Depth
          Dia.          Meters to Invert            Pipe Class          Other Requirements

          6                   0 - 1.4                                   VCP not to be used

          6                   1.4 - 4.9              Extra Strength

          6                   4.9 - 7.3             Extra Strength      With concrete cradle

          6                   Over 7.3              Extra Strength      With concrete encasement

E.   Polyvinyl Chloride Pipe (PVC)

     1.       Pipe

              a.       For polyvinyl chloride sewer pipe up to and including fifteen (15) NPS diameter,
                       pipe and fittings shall conform to ASTM D3034. Pipe and fittings shall have an
                       SDR classification of thirty-five (35).

     2.       Joints

              a.       PVC pipes and fittings shall be furnished with integral bells and spigots and rubber

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                       sealing rings. The rubber sealing rings shall meet the requirements of ASTM F477.
                        The joint design shall permit the pipe to expand, contract and deflect. The gasket
                       shall provide an adequate compressive force against the sealing surfaces of the bell
                       and spigot so as to effect a positive seal under all combinations of the joint
                       tolerances.

                       The gasket shall be the only element depended upon to make the joint flexible and
                       watertight. The joint shall meet the requirements of ASTM D3212.

F.   Ductile Iron Pipe (DIP)

     1.     Pipe

            a.         Ductile iron pipe shall be centrifugally cast, conforming to the requirements of
                       ANSI A21.51 (AWWA C151). Pipe and fittings shall be pressure class 1035 kPa
                       and shall have a minimum wall thickness of class 53 pipe.

     2.     Fittings

            a.         Fittings shall be cast iron or ductile iron conforming to the requirements of ANSI
                       A21.10 (AWWA C110).

     3.     Joints

            a.         All pipe joints shall be either mechanical joints or push-on joints. Joints for valves
                       and fittings may be flanged.

            b.         Mechanical joints, push-on joints, and gaskets shall conform to the requirements of
                       ANSI A21.11 (AWWA C111). All gaskets for mechanical joints shall as approved
                       by the Engineer.

            c.         Flanged joints shall conform to the requirements of ANSI A21.15 (AWWA C115)
                       and ANSI B16.1.

     4.     Lining

            a.         All pipe and fittings shall be cement lined in accordance with ANSI A21.4 (AWWA
                       C104). The lining shall be centrifugally applied and have a bituminous sealer. The
                       cement lining shall be standard thickness.

            b.         All pipe and fittings shall be coated on the outside at the point of manufacture with a
                       coal tar pitch varnish (pipe dip). The coating shall average 0.04 millimeters to 0.05
                       millimeters dry film thickness.

            c.         Pipe and fittings shall be encased in polyethylene tubes or sheets in accordance with
                       ANSI A21.5 (AWWA C105). The polyethylene tubes shall have a minimum
                       thickness of 0.20 millimeters.
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G.   Polyvinyl Chloride Pressure Pipe (PVCP)

     1.     Pipe

            a.         Polyvinyl chloride pressure pipe and fittings shall conform to the requirements of
                       ASTM D2241. PVCP pipe and fittings shall have an SDR classification of 18. The
                       material designation shall be PVC 1120.

     2.     Fittings

            a.         All fittings shall be either cast iron, ductile iron, or PVC. Cast iron or ductile iron
                       fittings shall be in accordance with the "Ductile Iron Pipe" section of this
                       specification.

            b.         PVC fittings shall be manufactured to the same standards as used for the pipe. They
                       shall be furnished in the same material and strength class as specified for the pipe.

     3.     Joints

            a.         PVC pipes and fittings shall be furnished with integral bells and spigots and rubber
                       sealing rings. The rubber sealing rings shall meet the requirements of ASTM F477.
                        The joint design shall permit the pipe to expand, contract and deflect. The gasket
                       shall provide an adequate compressive force against the sealing surfaces of the bell
                       and spigot so as to effect a positive seal under all combinations of the joint
                       tolerances. The gasket shall be the only element depended upon to make the joint
                       flexible and watertight. The joint shall meet the requirements of ASTM D3139.

H.   Electronic Markers

     1.     Electronic markers shall be passive devices capable of operating at a depth range up to 1.8
            meters minimum. They shall be designed for a forty (40) year life, have a special response
            frequency for sewers only, and be green in color conforming to OSHA requirements.

CONSTRUCTION DETAILS

A.   Receiving, Handling and Storage

     1.     Special care shall be taken in the loading, transportation and unloading of pipe. Under no
            circumstances shall a pipe be dropped. Suitable skids or blocks shall be placed under each
            pipe in the shop, and the pipe shall be securely wedged during transportation to prevent
            injury to the pipe and coating.

B.   Inspection

     1.     All pipe, specials and fittings shall be carefully inspected for defects immediately prior to the
            laying. No cracked, broken or defective materials shall be used in the work.
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     2.     If any defective piece shall be discovered after having been laid, it shall be removed and
            replaced with a sound one by the Contractor at no cost to the County or State.

C.   Preparation

     1.     The exact location and depth of house connections shall be as directed in the field by the
            Engineer to best suit, in location and depth, the property to be served.

D.   Excavation

     1.     Pipe trenches shall have flat bottoms conforming to the grade to which the pipe is to be laid.
            Excavation shall be in accordance with the requirements of Subsection 660-3.03
            "Excavation" of the New York State Standard Specifications. Backfill shall be in accordance
            with the requirements of Subsection 660-3.04 "Backfilling" of the New York State Standard
            Specifications. Special care shall be exercised in placing and compacting material
            immediately adjacent to the pipe in order to avoid damage to the pipe and to prevent pipe
            misalignment.

E.   Pipe Laying

     1.     All pipe lines shall be laid accurately to line and grade. The pipe shall be bedded in a firm
            and stable foundation.

     2.     The open ends of all pipe stubs or lines installed for future connection shall be capped or
            plugged watertight. The use of solvent cemented caps or plugs will not be permitted.

F.   House Connection Pipe

     1.     All house connection pipe shall be a minimum six (6) NPS diameter pipe.

     2.     House connection pipe shall be installed from the connection assembly or the riser assembly
            to a point 305 millimeters inside the curb except as listed below:

            a.      Where stormwater drains or utilities are located in the sidewalk area, the house
                    connections shall be installed to a point beyond the back edge of the drain or utility.

            b.      In State highways, the house connections shall be installed to the property line.

            c.      House connection tunneled close to poles or trees shall be extended to a point as
                    determined by the Engineer.

            d.      Deep house connections (depth 2.7 meters or greater) shall be extended to a point
                    1.5 meters beyond the edge of pavement and/or as directed by the Engineer.

     3.     Where the house connection pipe cannot be placed on undisturbed soil, the trench must be
            backfilled, and compacted to the invert of the house connection, prior to the installation of
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                any horizontal part of a house connection pipe.

        4.      If in the opinion of the Engineer, it is necessary to install a house connection under or close
                to a pole or tree, the house connection will be tunneled.

        5.      An electronic marker shall be set 150 to 300 millimeters above the last 300 millimeters of a
                house connection pipe. The electronic marker shall be installed in a level position. For
                house connection locations which require marker placements at a depth greater than 1.8
                meters, a "dummy" plastic marker of the same color and size as the electronic marker shall
                be placed 150 to 300 millimeters above the end of the house connection pipe and the
                electronic marker set directly above at its maximum operational depth. Any damaged or
                defective electronic marker shall be replaced by the Contractor at no cost to the County or
                State.

        6.      The Contractor is advised that it will be his responsibility to accurately mark the location of
                the altered/adjusted house connection at the new curbline. This will be accomplished by
                means of two parallel chisel marks approximately 51 millimeters apart, 6 millimeters deep,
                and 102 millimeters in length, perpendicular to the curbline. These marks shall be painted
                green with durable paint approved by the Engineer. If no curb exists at the house connection
                location, these marks will be chiseled and painted on the sidewalk. If no sidewalk or curb
                exists at this location, a 51 millimeter x 51 millimeter x 460 millimeter hardwood stake shall
                be driven flush with the soil. The top of this stake shall be painted green with a permanent
                paint.

        7.      Should subsequent replacement of the curb and/or sidewalk be ordered by the Engineer,
                these marks shall be replaced at no additional cost to the County or State.

METHOD OF MEASUREMENT

This work will be measured by the actual number of linear meters of new house connection pipe installed in a
manner satisfactory to the Engineer. The measurement will be made along the axis of the new pipe and
fittings installed.

BASIS OF PAYMENT

The price bid per meter shall cover the furnishing, delivering, handling, laying, cutting and joining pipe,
testing if required, and all labor and materials necessary to complete the work.

The price bid for this item shall include the cost of furnishing and installing PVC, PVCP, VCP and DIP pipe,
as required. No price differential shall be applied to the pipe material required.

No separate payment will be made for: (1) dewatering the excavation; (2) removing the plug from existing
capped house service connections that are to be extended; (3) plugging the open ends of extended house
connections installed for possible future connection; (4) altering the line and grade of the existing 5 NPS
and/or 6 NPS diameter sanitary sewer service connections; (5) any adapters and/or clamps necessary to
connect new 5 NPS and/or 6 NPS diameter pipe to existing; (6) hand tunneling of house connection pipe; (7)
electronic markers; (8) polyethylene encasement; (9) the removal and disposal of existing house service
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connection pipe, if required. The cost of this work shall be included in the price bid for this item.

The price bid for this item shall apply to both 5 NPS and 6 NPS diameter pipe and fittings, and no price
differential shall be applied.

Trench and Culvert Excavation, and sheet piling will be paid for under their respective items.




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