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Times (Seconds)

0-12 30 39 49
12-16 40 52 67
16-20 50 65 81
20-24 59 78 97
26-30 74 98 121

If the manhole fails the initial test, the Contractor shall locate the leaks and make
proper repairs. Leaks may be filled with a wet slurry of accepted quick setting
material. If the manhole should again fail the vacuum test, additional repairs shall be
made, and the manhole water tested as specified below.

C. WATER EXFILTRATION TEST:

lL.

After the manhole has been assembled in place, all lifting holes shall be filled and
pointed with an approved non-shrinking mortar. All pipes and other openings into the
manhole shall be suitably plugged and the plugs braced to prevent blow out. The test
shall be made prior to placing the shelf and invert. If the groundwater table has been
allowed to rise above the bottom of the manhole, it shall be lowered for the duration
of the test.

The manhole shall be filled with water to the top of the cone section. If the
excavation has not been backfilled and observation indicates no visible leakage, that is,
no water visibly moving down the surface of the manhole, the manhole may be
considered to be satisfactorily water-tight. If the test, as described above, is
unsatisfactory as determined by the Engineer or if the manhole excavation has been
backfilled, the test shall be continued. A period of time may be permitted if the
Contractor so wishes, to allow for absorption by the manhole. At the end of this
period, the manhole shall be refilled to the top of the cone, if necessary, and a
measuring time of at least 8 hours begun. At the end of the test period, the manhole
shall be refilled to the top of the cone, measuring the volume of water added. This
amount shall be extrapolated to a 24-hour loss rate and the leakage determined on the
basis of depth. The leakage for each manhole shall not exceed one gallon per
vertical foot for a 24-hour period. If the manhole fails this requirement, but the
leakage does not exceed 3 gallons per vertical foot per day, repairs by approved
methods may be made as directed by the Engineer to bring the leakage within the
allowable rate of one gallon per foot per day. Leakage due to a defective section or
joint or exceeding the 3 gallon per vertical foot per day, shall be cause for rejection of
the manhole. It shall be the Contractor's responsibility to uncover the rejected
manhole as necessary and to disassemble, reconstruct or replace it as directed by the
Engineer. The manhole shall then be retested and, if satisfactory, interior joints shall be
filled and pointed.

No adjustment in the leakage allowance will be made for unknown causes such as
leaking plugs, absorption, etc. It shall be assumed that all loss of water during the
test is a result of leaks through joints or through the concrete. Furthermore, the

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Contractor shall take any steps necessary to assure the Engineer that the water table is
below the bottom of the manhole throughout the test.

4. Ifthe groundwater table is above the highest joint in the manhole, and there is no
leakage into the manhole, as determined by the Engineer, such a test can serve to
evaluate water-tightness of the manhole. However, if the Engineer is not satisfied
with the results, the Contractor shall lower the water table and carry out the test as
described hereinbefore.

3.03 CLEANING:

All new manholes shall be thoroughly cleaned of all silt, debris and foreign matter of any
kind, prior to final inspection. Debris shall be decanted and disposed of at the City landfill.

END OF SECTION

2019 CIPP Lining Project Precast Manholes
Nashua, NH 02631-8

SECTION 02650

CURED-IN-PLACE PIPE (CIPP) LINING OF EXISTING SEWERS
(HOT WATER & STEAM)

PART 1 GENERAL

1.01 DESCRIPTION

A.

SCOPE

The work consists of furnishing all labor, equipment, materials, and incidentals
required to rehabilitate existing sewer mains by the installation of cured-in-place
pipe (CIPP) into the existing main. Work will include bypass pumping, sewer
cleaning and root cutting including decanting and disposal of debris at the City
landfill, initial closed circuit television (CCTV) inspection, identification of
existing live taps, removing of protruding taps by remote methods, installation of
resin-impregnated tube into the existing pipe followed by hot water or steam
curing as specified by the resin manufacturer, reopening service taps into the line,
sampling and testing, final closed circuit television (CCTV) inspection, and all
other related work. Before final acceptance of each line segment, a post-
rehabilitation video inspection and sample testing must be conducted and
approved. Rehabilitation must be completed for the full length from the manhole
to manhole, resulting in a sound, tight-fitting water-tight liner with a smooth
interior surface. All such work shall comply with these specifications and the
specific product manufacturer’s recommendations. Any conflict between the
product manufacturer’s recommendations and any portion of the contract
documents shall be resolved with the Engineer prior to proceeding with the work.

The Contractor, or the sub-contractor(s), shall not change any material, design
values or procedural matters stated or approved herein, without informing the
Engineer and receiving written advance approval of the change

Note:

Reference is made to the Supplementary Conditions Section A. Prosecution of
Work for a description of the process by which the Engineer will direct the
Contractor to make spot repairs both before and after lining.

SAFETY

This standard does not address safety problems associated with the use of this
product. It is the responsibility of the Contractor to establish appropriate safety
and health practices and determine the applicability of regulatory limitations prior
to use.

1.02 RELATED WORK:

A. Section 01110, CONTROL OF WORK AND MATERIALS

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B. Section 02085, POLY VINYL CHLORIDE PIPE AND FITTINGS

C. Section 02252, SUPPORT OF EXCAVATION

D. Section 02300, EARTHWORK

E. Section 02441, CLEANING, ROOT CUTTING, AND TELEVISION (CCTV)

INSPECTION OF PIPELINES
F. Section 02631, PRECAST MANHOLES
G. Section 02745, ROAD RESTORATION

H. Section 02800, MANHOLE REHABILITATION

1.03 REFERENCE STANDARDS

A. ASTM STANDARDS
The following references are part of this Specification. The latest edition of the
following references shall be used:

ASTM D 543: Standard Test Methods for Resistance of Plastics to
Chemical Reagents.

ASTM D 638: Standards Test Methods for Tensile Properties of
Plastics.

ASTM D 790: Standard Test Methods for Flexural Properties of

Unreinforced and Reinforced Plastics and Electrical
Insulating Materials.

ASTM D2990: Standard Test Methods for Tensile, Compressive,
and Flexural Creep and Creep-Rupture of Plastics.

ASTM F 1216: Standard Practice for Rehabilitation of Existing
Pipelines and Conduits by the Inversion and Curing
of a Resin-Impregnated Tube.

ASTM F 1743: Rehabilitation of Existing Pipelines and Conduits
by Pulled-in-Place Installation of Cured-in-Place
Thermosetting Resin Pipe (CIPP)

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* (Note: The Contractor may substitute an alternative method other than by
inversion to install the liner, as approved by the Engineer.

1.04 QUALITY ASSURANCE

A.

REQUIREMENTS

1.

Products used in the work of this section shall be produced by manufacturers
regularly engaged in the manufacture of cured-in-place liners for municipal
wastewater systems and with a history of successful production acceptable to
the owner.

The installing Contractor shall be licensed by the cured-in-place lining system
manufacturer and shall have successful experience in the installation of cured-
in-place lining systems in municipal wastewater systems. The Contractor
shall also be familiar with the specified requirements and the methods needed
for proper performance of the work of this section.

. When requested by the owner, the Contractor shall submit evidence

acceptable to the Engineer, such as a certified copy of a license or agreement,
that it has the authority to use and/or install the liner product.

The finished liner shall be continuous over the entire length of the liner
insertion run between the manholes and shall be free from visual defects such
as foreign inclusions, dry spots, pinholes, and delamination.

Wrinkles in the finished liner pipe which cause a backwater of one inch or
more or reduce the hydraulic capacity of the pipe are unacceptable and shall
be removed or repaired by the Contractor. If a void between the wrinkle and
the pipe develops, the Contractor shall repair or replace that section of the
pipe. Methods of repair shall be proposed by the Contractor and submitted to
the owner for review.

Following sewer cleaning and prior to installation of liner and finish work at
the manholes, the sewer shall be televised and recorded on videotape or in
digital format acceptable to the Engineer such as CD or DVD, and shall be
provided to the Engineer. The Contractor shall also televise the sewer after
completion of all liner insertion and finish work at the manholes. All Closed-
Circuit Television (CCTV) work is to be completed per industry standard of
care for sewer inspections and as specified herein.

The Contractor installing the Sectional Lining system shall have completed at
least five (5) projects, in the United States, within the past three (3) years and
projects that included CIPP installation lengths of at least 300 continuous
linear feet, on-site wet-out or resin impregnation of the liner tube, and design

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of a similarly sized Sectional Liner wall thickness based on a fully
deteriorated condition.

8. Supervisory personnel shall have a minimum of five (5) years of experience in
a supervisory role, and shall have completed at least five (5) projects of
similar size and complexity as this project within the past five (5) years.
Attach résumés of each person named. Résumé information shall include, at a
minimum, educational background, the number of years in a supervisory
capacity and a list of completed projects within the past two (2) years,
including project description, complexity and contract total amounts.

1.05 SUBMITTALS
The Contractor shall submit the following information:

A. MATERIAL SUBMITTALS

Contractor shall provide submittals on all lining materials and resins, and shall
furnish the manufacturers’ certifications that all of the liner materials are in
compliance with the specifications, codes, and standards referenced herein.
Calculations for the liner design and wall thickness for each manhole to manhole
section of pipe shall be prepared in accordance with ASTM 1216, signed and
sealed by a Professional Engineer registered in New Hampshire. The submittals
shall include installation instructions and details of all component materials and
construction methods. The Contractor shall also provide the liner tube
manufacturer’s certifications, field measurements, and pipe sizing calculations
which demonstrate that the liner tube has been properly sized to avoid the creation
of wrinkles or folds. The Contractor shall furnish Material Safety Data Sheets for
all appropriate materials to be used in the project.

B. INSTALLATION SUBMITTAL
The Contractor shall submit the method of liner insertion, liner size, thickness
calculations, and assumptions used as the basis for calculations for review by the
Engineer prior to the start of work. The liner shall provide complete structural
support without considering any structural support from the existing pipe except
during construction.

1.06 DESIGN PARAMETERS

A. The newly installed liner shall be designed for a minimum fifty-year service life
under continuous loading conditions. The design shall assume no bonding to the
original pipe wall. The liner shall be designed to withstand all imposed loads.

2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)
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Parameter C.LP.P. System

1. Pipe Condition Fully deteriorated

2. Soil Type Per in-situ conditions

3. Design Thickness Fiberglass: ASTM 1216 Design Formula,

4. Ovality of Pipe: 2% of circumference.

5. Soil Land 120 Ibs/ft.’

6. Traffic Loads Per AASHTO-HS-20-44 Highway Loading

7. Modulus of Soil 500 psi.

8. Maximum Deflection 5%

9. Minimum Safety 2.0

10. Resin Migration Not Allowed

11. Soil Cover Maximum depth of cover over the pipe
crown to highest ground surface along the
length of the pipe lining.

12. Water Table Assume at ground surface.

PHYSICAL PROPERTIES: The cured pipe shall conform to the minimum
structural standards, as follows:

Tensile Stress ASTM D-638 3,000psi
Flexural Stress ASTM D-790 4,500psi
Modulus of Elasticity ASTM D-790 250,000psi
(Initial)

Modulus of Elasticity ASTM D-2990 125,000psi
(Long Term)

Porosity/Water Tightness Test Tight

1.07 LINER THICKNESS CALCULATIONS

A. Calculations for the felt liner design and thickness for each manhole to manhole
section of pipe shall be prepared, signed and sealed by a Professional Engineer
registered in New Hampshire, and submitted to the Engineer for review prior to
lining. The minimum allowable thickness for CIPP products is 4.5mm and must
be increased as necessary to meet ASTM 1216 Design Formula in 1.5mm
manufacturing increments. Lining products below the stated minimum wall
thickness (above) will not be allowed under any circumstances.

1.08 CHEMICAL RESISTANCE

A. CHEMICAL RESISTANCE
Chemical resistance shall be in accordance with the requirements of Section 8 of
ASTM F 1216, Section X2, Chemical Resistance Tests for polyester resins and
completed in accordance with Test Method D 543. Exposure should be for a

2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)
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minimum of one month at 73.4 degrees F when subjected to the following

solutions:
Chemical Solution Concentration, %
Tap Water (ph 6-9) 100
Nitric Acid 5
Phosphorus Acid 10
Sulphuric Acid 10
Gasoline 100
Vegetable Oil 100
Detergent 0.1
Soap 0.1

The Contractor shall be responsible for all costs associated with the chemical
resistance tests. Proof of meeting these requirements shall be provided to the
Engineer for approval at least 7 days prior to the commencement of work.

1.09 WARRANTY

A. WARRANTY
The Contractor shall provide the Owner with a warranty to be in force and effect
for a period of one (1) year from the date of final acceptance of the project by the
Owner. The warranty shall cause the Contractor to repair or replace the liner
should failure or damage result from faulty materials or installation. At the end of
the warranty period, the Owner may perform a television inspection to confirm
the condition of the liner.

PART 2 MATERIALS
2.01 GENERAL

A. CERTIFICATE OF COMPLIANCE
A Certificate of Compliance with these Specifications shall be provided by the
manufacturer for all materials furnished under these specifications.

2.02 MATERIALS

A. RESIN

1. Unless otherwise specified, the Contractor shall furnish a general purpose,
unsaturated, thermosetting, polyester resin, able to cure in the presence or
absence of water, and a catalyst system compatible with the liner material that
provides the cured physical and chemical resistance strengths specified. The
initiation temperature for cure shall be as recommended by the resin

2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)
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B.

manufacturer and approved by the Engineer. Upon request, the Contractor
shall furnish satisfactory written certification that the materials comply with
the manufacturer’s standards and the reference specifications.

General corrosion requirements: The liner shall be fabricated from materials
which, when cured, will be chemically resistant to withstand exposure to
normal sewage effluent.

Resin shall not be affected by ultraviolet light and shall form no excessive
bubbling or wrinkling during lining. Resins shall be tinted for visibility and
provide indication of adequate liner wet-out. Material safety data sheets
(MSDS) for the resin, catalyst, cleaners and repair agents should be submitted
to the Engineer for review.

LINER TUBE

1.

The liner tube shall consist of one or more layers of flexible needled felt or an
equivalent non-woven and/or woven material capable of carrying resin,
withstanding installation pressures and curing temperatures, and compatible
with the resin system used. The liner tube shall be fabricated to a size that
will fit the internal circumference of the existing sewer main. Allowance shall
be made for stretching due to insertion of liner and deterioration of existing
pipe walls.

The minimum liner tube length shall be that deemed necessary by the
Contractor to effectively and continuously span the distance from the inlet to
the outlet of the respective manholes, unless otherwise specified. The
Contractor shall verify the lengths in the field before impregnation and
installation of the tube. Individual insertion mms may be made over one or
more manhole sections as determined in the field by the Contractor and
approved by the Engineer.

Prior to insertion, the liner tube shall be free of all visible tears, holes, cuts,
foreign materials, and other defects.

PART 3 INSTALLATION

3.01 GENERAL

3.02 PRE-INSTALLATION

A.

Prior to installation of the liner, the following activities are required:

a. Receipt and approval of pre-installation submittals.
b. Verification of line condition and any obstructions by video inspection.

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B.

c. Verification of existing taps in service by flowing water, dye test, or visually
with a pan and tilt head camera or other means.

d. Cleaning of line (recorded on video tape).

Root cutting

f. Construct and complete any and all point repairs deemed necessary shall
receive Engineer’s approval before reworking the lines and the liner is
installed.

@

Prior to installation, the diversion pumping system, including back-up pumps,
shall be tested and running.

3.03 PREPARATION

A.

CLEANING, ROOT CUTTING AND INSPECTION

Debris shall be removed from the pipeline with high velocity jet cleaners. All
roots shall be cut and removed with appropriate equipment. The pipeline shall be
inspected with CCTV equipment to assure that the pipe is in a condition that it
can be lined. Obstructions shall be removed and services marked for
reinstatement prior to lining.

BYPASS PUMPING

Bypass pumping shall usually be made by plugging the upstream manhole and
pumping the sewage into the downstream manhole, or by pumping into an
alternate sewer system of adequate capacity to handle the additional sewage flow.
The pump and bypass lines shall be sized to handle the anticipated flows.

LATERAL CONNECTIONS
Contractor shall record location, size, material and relative invert elevation of
each lateral connection with respect to the pipeline.

3.04 INSTALLATION PROCEDURES

A.

INSTALLATION

Installation of the liner shall be through existing or new manholes. Excavation for
liner insertion shall not be permitted except to remove and replace the manhole
cones, if necessary and/or required.

WATER

Where water is used for insertion and curing processes it may be supplied from
existing fire hydrants. The Contractor shall make arrangements for obtaining
water. Costs for water shall be borne by the Contractor.

RESIN IMPREGNATION

The Contractor shall designate a location where the liner tube will be impregnated
with resin prior to installation. The liner tube shall be impregnated by vacuum or
other approved means. The Contractor shall allow the Owner and Engineer to

2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)

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