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SECTION 02085

POLYVINYL CHLORIDE GRAVITY PIPE AND FITTINGS

PART 1 - GENERAL

1.01 WORK INCLUDED:
This section covers the furnishing and installation of Polyvinyl Chloride (PVC) pipe and
fittings for sewer mains, sewer service connections and drain laterals to catch basins, as
indicated on the drawings and as specified herein.
1.02 RELATED WORK:
A. Section 01330, SUBMITTALS
B. Section 02252, SUPPORT OF EXCAVATION
C. Section 02300, EARTHWORK

D. Section 02518, TRACER TAPE

E. Section 02631, PRECAST MANHOLES AND CATCH BASINS

1.03 REFERENCES:
A. _ The following standards form a part of these specifications as referenced:
American Society for Testing and Materials (ASTM)

ASTM _—iD2321 Recommended Practice for Underground Installation of Flexible
Thermoplastic Sewer Pipe

ASTM — _D3034 Specification for Type PSM Polyvinyl Chloride (PVC) Sewer
Pipe
and Fittings

ASTM D3212 Specification for Joints for Drain and Sewer Plastic Pipes Using
Flexible Elastomeric Seals

ASTM _ F679 Specification for Polyvinyl Chloride (PVC) Large Diameter
Plastic Gravity Sewer Pipe and Fittings (18"- 27")

The National Association of Sewer Service Companies (NASSCO) Recommended
Specifications for Sewer Collection System Rehabilitation (Current Edition).

2022 Sewer Replacement Project Polyvinyl Chloride Gravity Pipe and Fittings
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B. New Hampshire Code of Administrative Rules, Env-Wq 704, Design of Sewerage.

1.04 SUBMITTALS:
In accordance with requirements of the General Specifications submit six (6) sets of
manufacturer's literature of the materials of this section shall be submitted to the Engineer for
review.

PART 2 - PRODUCTS

2.01 MATERIALS:

A. PVC NON-PRESSURE SEWER PIPE:

PVC non-pressure sewer pipe 4-inches through 15-inches diameter (SDR-35) shall be solid
wall and conform to ASTM - D3034. PVC non-pressure sewer pipe 18-inches through 48-
inches be shall be solid wall and conform to ASTM F679, PS 46 or PS 115. All pipe shall be
as specified and meet the following requirements.

1. PVC non-pressure sewer pipe shall be furnished in standard lengths.

2. One pipe bell consisting of an integral wall section with a solid cross section rubber ring,
factory assembled, shall be furnished with each standard, random and short length of pipe.
Rubber rings shall be provided to the requirements of ASTM D3212.

3. The rubber ring shall be retained within the bell of the pipe by a precision formed groove or
recess designed to resist fish-mouthing or creeping during assembly of joints.

4. Spigot pipe ends shall be supplied with bevels from the manufacturer to ensure proper
insertion. Each spigot end shall have an "assembly stripe" imprinted thereon to which the
bell end of the mated pipe will extend upon proper jointing of the two pipes.

5. PVC fittings shall be provided with bell and/or spigot configurations with rubber gasketed
joints compatible with that of the pipe. Bend fittings with spigot ends shorter than the pipe
recess bells will not be allowed. The shorter spigot end would not allow proper seating of
the spigot in the mating bell and would permit undesired contact between the mating bell
and the outside of the fitting bell.

6. All pipe delivered to the job site shall be accompanied by independent testing laboratory
reports certifying that the pipe and fittings conform to the above-mentioned specifications.
In addition, the pipe shall be subject to thorough inspection and tests, the right being
reserved for the Engineer to apply such of the tests specified as he may from time to time
deem necessary.

7. All cutting of pipe shall be done with a machine suitable for cutting PVC pipe. Cut ends
shall be beveled when recommended by the pipe manufacturer.

8. All couplings for connecting pipes of various sizes shall be FERNCO STRONGBACK

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flexible repair couplings, or approved equal, of the appropriate size to fit the external
diameter of each pipe.

B. SEWER AND DRAIN PIPE BEDDING AND SAND BLANKET:
Sewer pipe bedding and sand blanket shall be as specified in Section 02300 EARTHWORK.
C. DUCTILE IRON PIPE:

Ductile iron pipe shall be used at sewer/water line crossings and conform to AWWA
C151/A21.50 & 51, Class 52.

D. SEWER SERVICE SADDLES:

Sewer service saddles shall be Inserta Tee or approved equal, and shall be sized to conform to
the outside diameter and wall thickness of the host pipe. Saddles shall be used only in
locations approved by the Engineer, and shall be installed in accordance with the
manufacturer’s recommendations.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. — Except as modified herein, installation of the PVC pipe shall be in accordance with ASTM
D2321.

B. Each pipe length shall be inspected before being laid to verify that it is not cracked. Pipe
shall be laid to conform to the lines and grades indicated on the drawings or given by the
Engineer. Each pipe shall be so laid as to form a close joint with the next adjoining pipe and
bring the inverts continuously to the required grade.

C. The pipe shall be bedded and covered with sand blanket as specified under Section 02300,
EARTHWORK, and as detailed on the project plans.

D. The pipe shall not be driven down to grade by striking it with a shovel handle, timber,
rammer, or other unyielding object. When each pipe has been properly bedded, enough of the
backfill material shall be placed and compacted between the pipe and the sides of the trench
to hold the pipe in correct alignment.

E. Before a joint is made, the pipe shall be checked to assure that a close joint with the next
adjoining pipe has been maintained and that inverts are matched and conform to the required
line and grade.

F. _ For pipe placed on crushed stone, immediately after the joint is made, the jointing area shall
be filled with suitable materials so placed and compacted that the ends of either pipe will not
settle under backfill load.

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No pipe or fitting shall be permanently supported on saddles, blocking, or stones.

Branches and fittings shall be laid by the Contractor as indicated on the drawings, and/or as
directed by the Engineer. Open ends of pipe and branches shall be closed with PVC caps
secured in place with pre-molded gasket joints or as directed by the Engineer.

All pipe joints shall be made as nearly watertight as practicable. There shall be no visible
leakage at the joints and there shall be no sand, silt, clay, or soil of any description entering
the pipeline at the joints. Where there is evidence of water or soil entering the pipeline,
connecting pipes, or structures, the defects shall be repaired to the satisfaction of the
Engineer.

The Contractor shall build a tight bulkhead in the pipeline where new work enters an existing
sewer. This bulkhead shall remain in place until its removal is authorized by the Engineer.

Care shall be taken to prevent earth, water, and other materials from entering the pipe, and
when pipe laying operations are suspended, the Contractor shall maintain a suitable stopper
in the end of the pipe and also at openings for manholes.

As soon as possible after the pipe and manholes are completed on any street, the Contractor
shall flush out the new pipeline using a rubber ball ahead of the water, and none of the
flushing water or debris shall be permitted to enter any existing sewer.

M. A tracer tape shall be placed in the trench as specified in Section 02518, TRACER TAPE.

3.02 CLEANING:

A. On completion of a section of sewer, the Contractor shall TV inspect the main section in
accordance with Section 02441, Cleaning and Television (CCTV) Inspection of Pipelines at
no additional cost to the Owner.

3.03 TESTING

A. Testing of pipe joints to identify joints that are defective shall be performed using either
liquid or air, at the Contractor's option. Test pressure used shall be acceptable to the
Engineer.

B. The allowable pressure drop shall be 0.5 pounds in 15 seconds at a pressure greater than %
pounds per vertical foot of pipe cover, or 4 pounds minimum.

C. — Electronic video equipment shall be capable of displaying and recording, at a minimum, the
following data for each pipe joint:

1. Project Identification
2. Date recorded
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3. Footage counter
4. Test pressure
5. Sewer reach identification (street location, start MH and second MH)

D. PIPE DEFLECTION MEASUREMENT:

1. In accordance with ASTM D3034, no less than 30 days after completion of the PVC
sewer pipe installation, the Contractor shall test the pipeline for deflection using a
"go/no-go" deflection mandrel having a minimum of nine evenly spaced arms or
prongs. The "go/no-go" gauge shall be hand pulled through all sections of the pipeline
by the Contractor. The Contractor shall submit drawings of the "go/no-go" gauge to
the Engineer for approval prior to testing. Complete dimensions of the gauge for each
diameter of pipe to be tested shall be in accordance with ASTM D3034.

2. Any section of pipe found to exceed 7.5 percent deflection shall be deemed a failed
pipe and shall be excavated and replaced by the Contractor at his own expense.

END OF SECTION

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SECTION 02252
SUPPORT OF

EXCAVATION

PART 1 - GENERAL

1.01

A.

WORK INCLUDED:

This section of the specification covers sheeting and bracing for support of
excavations. The requirements of this section shall also apply, as appropriate, to
other methods of excavation support and underpinning which the Contractor elects to

use to complete the work.

The Contractor shall furnish and place sheeting of the kinds and dimensions required,
complying with these specifications, where indicated on the drawings or ordered by

the Engineer.

RELATED WORK:

Section 02300, EARTHWORK.
QUALITY ASSURANCE:

This project is subject to the Safety and Health regulations of the U.S. Department of
Labor set forth in 29 CFR, Part 1926, and to New Hampshire law, RSA, Title XXIII:
Labor. Contractors shall be familiar with the requirements of these regulations.

The excavation support system shall be of sufficient strength and be provided with
adequate bracing to support all loads to which it will be subjected. The excavation
support system shall be designed to prevent any movement of earth that would
diminish the width of the excavation or damage or endanger adjacent structures.

PART 2 - PRODUCTS

2.01 MATERIALS:

A. Steel used for bracing shall be of such size and strength as required in the excavation
support design. Timber or steel used for bracing shall be new or undamaged used
material which does not contain splices, cutouts, patches, or other alterations which
would impair its structural integrity or strength.

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PART 3 — EXECUTION

3.01 INSTALLATION:

A. Work shall not be started until all materials and equipment necessary for their
construction are either on the site of the work or satisfactorily available for
immediate use as required.

B. _ The sheeting shall be securely and satisfactorily braced to withstand all pressures to
which it may be subjected and be sufficiently tight to minimize lowering of the
groundwater level outside the excavation.

C. No sheeting may be left so as to create a possible hazard to safety of the public or a
hindrance to traffic of any kind.

D. If boulders or very dense soils are encountered, making it impractical to drive a
section to the desired depth, the section shall be cut off.

E. The sheeting shall be left in place where indicated on the drawings or ordered by the
Engineer in writing. At all other locations, the sheeting may be left in place or
salvaged at the option of the Engineer. Steel sheeting permanently left in place shall
be cut off at a depth of not less than two feet below finish grade unless otherwise
directed.

F. All cut-off will become the property of the Contractor and shall be removed by him
from the site.

G. Sole responsibility for the satisfactory construction and maintenance of the
excavation support system, complete in place, shall rest with the Contractor. Any
work done, including incidental construction, which is not acceptable for the
intended purpose shall be either repaired or removed and reconstructed by the
Contractor at his expense.

H. The Contractor shall be solely responsible for repairing all damage associated with
installation, performance, and removal of the excavation support system.

END OF SECTION

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SECTION 02300

EARTHWORK

PART 1 - GENERAL

1.01

1.02

>

G5 Oo 8

1.03

WORK INCLUDED:

The Contractor shall make excavations of normal depth in earth for trenches and
structures, shall backfill and compact such excavations to the extent necessary,
shall furnish the necessary material and construct embankments and fills, and shall
make miscellaneous earth excavations and do miscellaneous grading.

RELATED WORK:

Section 01110, CONTROL OF WORK AND MATERIALS

Section 02085, POLY VINYL CHLORIDE GRAVITY PIPE AND FITTINGS
Section 02252, SUPPORT OF EXCAVATION

Section 02370 —- EROSION CONTROL

Section 02518, TRACER TAPE

Section 02745, ROAD RESTORATION

REFERENCES:
American Society for Testing and Materials (ASTM)

ASTM _Cl131 Test Method for Resistance to Degradation of Small Size
Coarse Aggregate by Abrasion and Impact in the Los Angeles
Machine.

ASTM C136 Method for Sieve Analysis of Fine and Coarse Aggregates.
ASTM ~— C330 Specification for Lightweight Aggregate
for Structural Concrete.

ASTM D1556_ Test Method for Density of Soil in Place by the Sand Cone
Method.

ASTM = D1557 Test Methods for Moisture-density Relations of Soils and
Soil
Aggregate Mixtures Using Ten-pound (10 Lb.) Hammer and
Eighteen-inch (18") Drop.

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ASTM D2922 ~=Test Methods for Density of Soil and Soil-aggregate in Place
by Nuclear Methods (Shallow Depth).

1.04 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF
GENERAL SPECIFICATIONS, SUBMIT THE FOLLOWING:

Material test results performed by a certified laboratory shall be submitted to the
Engineer for all materials proposed for use on the project. If required by the
Engineer, samples shall be submitted for independent testing.

1.05 PROTECTION OF EXISTING PROPERTY:

A. The work shall be executed in such manner as to prevent any damage to facilities
at the site and adjacent property and existing improvements, such as but not
limited to streets, curbs, paving, service utility lines, structures, monuments, bench
marks, observation wells, and other public or private property. Protect existing
improvements from damage caused by settlement, lateral movements,
undermining, washout and other hazards created by earthwork operations.

B. In case of any damage or injury caused in the performance of the work, the
Contractor shall, at its own expense, make good such damage or injury to the
satisfaction of, and without cost to, the Owner. Existing roads, sidewalks, and
curbs damaged during the project work shall be repaired or replaced to at least the
condition that existed at the start of operations. The Contractor shall replace, at his
own cost, existing benchmarks, observation wells, monuments, and other reference
points which are disturbed or destroyed.

C. Buried drainage structures and pipes, observation wells and piezometers, including
those which project less than eighteen inches (18") above grade, which are subject
to damage from construction equipment shall be clearly marked to indicate the
hazard. Markers shall indicate limits of danger areas, by means which will be
clearly visible to operators of trucks and other construction equipment, and shall be
maintained at all times until completion of project.

1.06 DRAINAGE:

A. The Contractor shall provide, at its own expense, adequate drainage facilities to
complete all work items in an acceptable manner. Drainage shall be done in a
manner so that runoff will not adversely affect construction procedures or cause
excessive disturbance of underlying natural ground or abutting properties.

1.07 FROST PROTECTION AND SNOW REMOVAL:

A. The Contractor shall, at its own expense, keep earthwork operations clear and free
of accumulations of snow as required to carry out the work.

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B. The Contractor shall protect the sub-grade beneath new structures and pipes from
frost penetration when freezing temperatures are expected.

PART 2 - PRODUCTS

2.01 MATERIAL:

A. CRUSHED GRAVEL:
The Gravel Road Base will be NHDOT - Item 304.3 Crushed Gravel, or Item 304.4
Crushed Stone (Fine Gradation).

B. TRENCH BACKFILL MATERIALS:
Trench backfill shall be material excavated from the trench that is granular, well
graded friable soil; free of pavement, rubbish, ice, snow, tree stumps, roots, clay
and organic matter; with 30 percent or less passing the No. 200 sieve; no stone
greater than two-third (2/3) loose lift thickness, or six inches, whichever is smaller.

C. SEWER AND DRAIN PIPE BEDDING MATERIAL

1. Sewer and drain pipe bedding material shall be Crushed Stone meeting the ASTM
C33/C33M stone size No. 67.

2. Sand Blanket material for sewer and drain pipe shall be graded sand free from
organic materials, graded such that 100 percent passes a '¥2-inch sieve and a
maximum of 15 percent passes a #200 sieve.

PART 3 — EXECUTION

3.01 DISTURBANCE OF EXCAVATED AND FILLED AREAS DURING
CONSTRUCTION:

A. Contractor shall take the necessary steps to avoid disturbance of sub-grade during
excavation and filling operations, including restricting the use of certain types of
construction equipment and their movement over sensitive or unstable materials,
dewatering and other acceptable control measures.

B. All excavated or filled areas disturbed during construction, all loose or saturated soil,
and other areas that will not meet compaction requirements as specified herein shall
be removed and replaced with a minimum 12-inch layer of compacted crushed stone
wrapped all around in non-woven filter fabric. Costs of removal and replacement
shall be borne by the Contractor.

C. The Contractor shall place a minimum of 12-inch layer of special bedding materials
and crushed stone wrapped in filter fabric over the natural underlying soil to stabilize
areas which may become disturbed as a result of rain, surface water runoff or
groundwater seepage pressures, all at no additional cost to the Owner. The
Contractor also has the option of drying materials in-place and compacting to

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