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All wet-out or impregnation of the Tube must be done in an EPA-
regulated, quality-controlled facility. Documentation of EPA permitting
must be submitted with all qualified bids. No “over the hole” or “on-site”
wet-out is allowed. For products that are cured with hot water, the wet-out
must be conducted within 300 miles of the job site considering the time-
sensitive characteristics of thermal-cured products.

FIBERGLASS TUBE

The glass fiber tubing shall be seamless and spirally wound, including an
exterior and interior film that protects and contains the resin used in the
liner. The exterior film will be provided with a UV light blocker foil.

The Tube shall consist of a seamless, spirally wound glass fiber that is
flexible and has strain values (expandable) of equal to eight (8) percent.
The tube will not have a longitudinal seam, including a stitched seam,
stitch-free-weld or bond, or stitch-free overlap. The tube shall be
constructed to withstand installation pressures and have sufficient strength
to bridge missing pipe.

The impregnated Tube shall have a uniform thickness, that when
compressed at installation pressures, will meet or exceed the Design
thickness. If voids are present in the pipe, the Design wall thickness must
still be met or exceeded.

The Tube shall be sized such that when installed, it will tightly fit the
internal circumference and length of the original pipe.

The glass fiber Tube shall be saturated with the appropriate resin using a
resin bath to allow for the lowest possible amount of air entrapment.
Vacuum-suction impregnation methods are not allowed due to the
introduction of air using this method. The liner will then be formed into a
spirally wound shape for the purpose of being seamless in its cured state.
An inner and outer material will be added that are both impervious to
airborne styrene, with the outer materials also having UV blocking
characteristics. The inner membrane will be removed after the installation
and curing processes are completed.

The wall color of the interior pipe surface of CIPP after installation shall
be a light reflective color so that a clear detailed examination with closed
circuit television inspection equipment may made.

The liner should be seamless in its cured state to insure homogenous
physical properties around the circumference of the cured liner.

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Professional Engineer, and any other communication about the contract shall be addressed or be
delivered to the City of Nashua Representative.

CHANGES TO SCOPE OF WORK The City of Nashua may, at any time, by written order, make
changes to the general scope, character, or cost of this contract and in the services or work to be
performed, either increasing or decreasing the scope, character, or cost of Professional Engineer's
performance under the contract. Professional Engineer shall provide to the City of Nashua within
10 calendar days, a written proposal for accomplishing the change. The proposal for a change shall
provide enough detail, including personnel hours for each sub-task and cost breakdowns of tasks,
for the City of Nashua to be able to adequately analyze the proposal. The City of Nashua will then
determine in writing if Professional Engineer should proceed with any or all of the proposed
change. If the change causes an increase or a decrease in Professional Engineer's cost or time
required for performance of the contract as a whole, an equitable adjustment shall be made and the
contract accordingly modified in writing. Any claim of Professional Engineer for adjustment under
this clause shall be asserted in writing within 30 days of the date the City of Nashua notified
Professional Engineer of the change.

When Professional Engineer seeks changes, Professional Engineer shall, before any work
commences, estimate their effect on the cost of the contract and on its schedule and notify the City
of Nashua in writing of the estimate. The proposal for a change shall provide enough detail,
including personnel hours for each sub-task and cost breakdowns of tasks, for the City of Nashua
to be able to adequately analyze the proposal. The City of Nashua will then determine in writing
if Professional Engineer should proceed with any or all of the proposed change.

Except as provided in this paragraph, Professional Engineer shall implement no change unless the
City of Nashua in writing approves the change. Unless otherwise agreed to in writing, the
provisions of this contract shall apply to all changes. The City of Nashua may provide verbal
approval of a change when the City of Nashua, in its sole discretion, determines that time is critical
or public health and safety are of concern. Any verbal approval shall be confirmed in writing as
soon as practicable. Any change undertaken without prior City of Nashua approval shall not be
compensated and is, at the City of Nashua's election, sufficient reason for contract termination.

CITY OF NASHUA COOPERATION The City of Nashua agrees that its personnel will cooperate
with Professional Engineer in the performance of its work under this contract and that such
personnel will be available to Professional Engineer for consultation at reasonable times and after
being given sufficient advance notice that will prevent conflict with their other responsibilities.
The City of Nashua also agrees to provide Professional Engineer with access to City of Nashua
records in a reasonable time and manner and to schedule items that require action by the Board of
Public Works and Finance Committee in a timely manner. The City of Nashua and Professional
Engineer also agree to attend all meetings called by the City of Nashua or Professional Engineer to
discuss the work under the Contract, and that Professional Engineer may elect to conduct and record
such meetings and shall later distribute prepared minutes of the meeting to the City of Nashua.

DISCOVERY OF CONFLICTS, ERRORS, OMISSIONS, AMBIGUITIES, OR DISCREPANCIES
Professional Engineer warrants that it has examined all contract documents, has brought all
conflicts, errors, discrepancies, and ambiguities to the attention of the City of Nashua in writing.
and has concluded that the City of Nashua's resolution of each matter is satisfactory to Professional
Engineer. All future questions Professional Engineer may have concerning interpretation or
clarification of this contract shall be submitted in writing to the City of Nashua within 10 calendar
days of their arising. The writing shall state clearly and in full detail the basis for Professional
Engineer's question or position. The City of Nashua representative shall render a decision within
15 calendar days. The City of Nashua's decision on the matter is final. Any work affected by a
conflict, error, omission, or discrepancy which has been performed by Professional Engineer prior
to having received the City of Nashua's resolution shall be at Professional Engineer's risk and
expense. At all times, Professional Engineer shall carry on the work under this contract and

GC 3 of 11

The manufacturer will test the raw materials and liner materials at various
stages of manufacturing on every liner, including taking samples of every
finished liner and conducting test for e-modulus, tensile, wall thickness
and porosity.

Fiberglass materials must be “direct sized” to enhance the fiberglass/resin
bond. Certification of this coating and its compatibility with the resin
system used is required.

The Tube shall be constructed to withstand installation pressures and have
sufficient strength to bridge missing pipe while meeting or exceeding the
Design wall thickness at all pipe locations during installation conditions
and pressures.

PART 3 INSTALLATION

3.01. GENERAL

Installation of the impregnated liner may be by inversion, or pull in place insertion as
specified by the manufacturer. All equipment, labor materials, and processes required to
complete the work must be ready on-site before installation begins.

3.02 PRE-INSTALLATION
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.

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).

e. 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 SET-UP

The installation area/equipment shall be securely protected and all damaged yards,
driveways, walks, etc., shall be repaired at no cost to the Owner. Plastic sheeting will be
used to cover the work area around the manholes and/or access points to eliminate the
opportunity of environmental contamination to the above-ground setting during the
installation process.

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3.04 PRE-LINER/OUTER FILM/OUTER LINER

At all locations where the CIPP liner is inverted or inserted into the host pipe, a pre-liner
tube shall be used to control resin loss, liner thickness, a reduction in physical properties,
contamination of the resin by water or other contaminants, and prevent blocked or
plugged services or laterals. The pre-liner tube shall be reinforced plastic sheet formed
into a tube sized to fit the host pipe being lined and shall be continuous from manhole to
manhole. The pre-liner tube must be a rated gas barrier for styrene. Installation of the
pre-liner tube shall be witnessed by the Owner or Engineer. Failure to install the required
pre-liner tube or installation of pre-liner tube over only part of the segment shall result in
the completed C.I.P.P. for that segment being rejected (regardless of physical tests and
thickness test results). During thickness testing, the pre-liner tube shall be removed from
the thickness test core sample along with the inner liner firm used. If there is any damage
to the pre-liner tube, it should be repaired immediately with styrene-proof tape.

3.05 TUBE INSERTION AND CURING

1. An independent slip sheet, or integrated slip sheet shall be installed on the bottom
half of the pipe prior to liner insertion, for the purpose of smoothing out the bottom of
the liner to increase flow characteristics.

2. The pre-liner tube, or outer film, must be inserted into the pipe prior to inserting the
liner, unless it is manufactured on the exterior of the liner, which is a normal
characteristic of most fiberglass CIPP liners.

3. A constant tension winch should be used to pull the glass fiber liner into position in
the pipe. Once inserted, end plugs shall be used to cap each end of the glass fiber
liner to prepare for pressurizing the liner. The end plugs should be secured with
straps to prevent them from being expelled due to pressure. Liner restraints should be
used in manholes.

4. The glass fiber liner shall be cured with UV light sources at a constant inner pressure.

a. The UV light sources should be assembled according to the manufacture’s
specifications for the liner diameter. For the liner to achieve the required water
tightness and specified mechanical properties, the following parameters must be
controlled during the entire curing process, giving the Engineer a record of the
curing parameters over every segment of the entire length of the liner. This
demonstrates that the entire liner is cured properly. The recording will include:

e Curing Speed

° Light source working & wattage
e Inner air pressure
® Exothermic (curing) temperatures
e Date and time
® Length of liner
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5. This will be accomplished using a computer and data base that are tamper proof.
During the curing process, infrared sensors will be used to record curing data that will
be submitted to the Engineer with a post CCTV inspection on DVD.

The parameters for curing speed, inner air pressure and wattage are defined in the
Quality Tracker UV curing protocol issued by the manufacturer. The optimal curing
speed, or travel speed of the energized UV light sources, is determined for each
length of liner based or liner diameter, liner thickness, and exothermic reaction
temperature.

6. Flushing of the cured fiberglass/UV cured CIPP liner (to reduce styrene residual) is
not required for fiberglass/UV cured CIPP products that provide 3™ party test results
that document styrene residual levels (without flushing) within acceptable defined
levels.

3.06 SEALING AT MANHOLES

The cured-in-place CIPP shall make a tight seal at the manhole wall opening with no
annular gaps. Under all circumstances, the liner shall be sealed to the manhole and host
pipe with a resin mixture compatible with the liner/resin system, and applied in
accordance with the manufacturer’s specifications.

3.07 REINSTATEMENT OF SERVICES

1. All live services shall be reinstated as soon as practical after rehabilitation,
testing, and cooling of sewer lines. Inactive services may be left unopened as
directed by the Engineer. It is the Contractor’s responsibility to document all
live services prior to lining. Each service connection shall be noted by its
size, position from a reference manhole, and orientation with respect to the
circumference of the pipe. Reconnection shall be accomplished from the
interior of the sewer line by means of a television camera and a remote
controlled cutting device. Excavation to activate existing sewer services shall
not be allowed.

2. Holes cut through the rehabilitation liner shall be done in a two-step process.
The holes shall be first cut open with a router bit or deburring tool, and then
brushed with a wire brush to a neat and smooth surface. Holes shall reopen
service lines to a minimum of ninety (90%) percent of the service lateral. A
one-step process that accomplishes the same effect may be used if approved
by the Engineer.

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3.08 FINISH

The finished CIPP shall be continuous over the entire length of any section
and be as free as commercially practicable from visual defects such as
foreign inclusions, dry spots, pinholes and delamination.

3.09 TESTING, INSPECTION AND ACCEPTANCE

A. MATERIAL TESTING

1. All material testing shall be performed by a registered independent, third-
party laboratory, and paid for by the Contractor.

2. The Contractor shall provide test results of the short term properties of the
cured lining material in the quantity of one test per liner batch, or 3,000 feet of
installed liner, or as required by the Owner. The liner shall be in compliance
with the physical properties described in these Specifications. Flexural

strength and modulus shall be tested in accordance with the requirements of
ASTM D 790.

B. INSPECTION

1. After the work is completed, the Contractor shall inspect the pipeline by
closed circuit color television inspection and shall provide the Engineer with
one copy of a videotape or acceptable digital format recording of this
inspection log for the Owner’s records. Any repaired areas shall be re-
televised.

C. FIELD TEST (THICKNESS)

1. Remove the CIPP liner material from the host pipe core samples. Remove
any inner liner film, pre-liner and resin that is not contained within the tube.
Measure the liner thickness at three spots on each sample. The resulting six

measurements will be averaged. The average thickness shall be equal to or
greater than the required thickness for the particular section. No undersize
allowance is permitted. In accordance with D 790-03, referenced in ASTM
1216, the calculated wall thickness refers only to the part of the liner that
consists of a saturated tube. Elements that are not part of the saturated tube do
not contribute to the structural integrity of the liner, thereby excluding tube
that is not fully saturated or portions of resin without the tube carrier.

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ACCEPTANCE

3.

Prior to final acceptance, any defects that may affect the integrity or strength
of the pipeline is the opinion of the Engineer shall be repaired by the
Contractor at no additional cost to the Owner.

Pipeline shall be true to line and grade, with no visual bulges, sags,
protrusions, deflections, offset joints, leaking joints, or other visible
infiltration, or other defects that would impair the intended use of the
completed pipeline.

Final acceptance of work shall not be granted until all defective areas are
repaired in accordance with the CIPP manufacturer’s recommendations and to
the Engineer’s satisfaction.

Any repairs required by the Engineer as a result of the post construction
internal inspection shall be performed by the Contractor.

Contractor shall perform a post construction internal inspection in accordance
with Section 02760. Final acceptance of the work shall not be granted until
post installation inspection has been reviewed and approved by the Engineer.

Contractor shall perform testing as specified. Final acceptance of the work

shall not be granted until the appropriately formatted testing results have been
reviewed and approved by the Engineer.

END OF SECTION

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SECTION 02745

ROAD RESTORATION

PART 1 - GENERAL
1.01 WORK INCLUDED:

Furnish all labor, equipment and materials required to install crushed gravel base
course, bituminous concrete pavement courses including temporary and permanent trench
paving curbing, sidewalks, disposal of excess material at the City landfill and restoration of
pavement markings in roadway areas where spot sewer repairs are required, manholes are to
be installed, manhole frames and covers are replaced, or as ordered by the Engineer and as
specified herein.

1.02 RELATED WORK:

A. Section 02300, EARTHWORK.

B. Section 02631, PRECAST MANHOLES
1.03 PAVEMENT DESCRIPTION:

A. GENERAL

In roadway areas where sewer spot repairs are required or ordered by the Engineer,
All trenched areas shall be paved with temporary bituminous pavement as detailed on the
plans as soon as practicable after installation of individual pipeline segments, but no trench
shall be without temporary pavement longer than seven (7) calendar days. After a minimum
period of 30 days, the trench patch pavement area shall be saw cut and removed beyond the
limits of the trench, and crushed gravel and binder and finish courses of pavement shall be
installed as detailed on the Contract Drawings, or as ordered by the Engineer. Miscellaneous
curbing and sidewalk disturbed by spot repairs shall be repaired as detailed on the Contract
Drawings, or as ordered by the Engineer.

1.04 REFERENCES

The following standards form a part of these specifications and indicate the minimum
standards required:

American Society for Testing and Materials (ASTM):

ASTM D1557 __ Test for Moisture-Density Relations of Soils and Soil-Aggregate
Mixtures Using 10 Pound Rammer and 18-Inch Drop

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1.05

State of New Hampshire Department of Transportation (NHDOT) Standard
Specifications for Road and Bridge Construction, latest edition:

Section 304 Base Courses
Section 401 Plant Mix Pavements - Table 401-1, 401-2
Section 632 Retroreflective Pavement Markings

Prime and Tack Coats - shall conform to the NHDOT Standards

Federal Specifications:
SS-S-164 Sealing Compound, Hot Poured Type, for Joints in Concrete
SS-S-1401C Sealants, Joint, Non-Jet-Fuel-Resistant, Hot Applied, for Portland

Cement and Asphalt Concrete Pavement

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

Six sets of complete job mix formula shall be submitted to the Engineer at least two weeks
before any of the work of this section is to begin.

Delivery slips shall be furnished with each load of mix delivered to the project.
Information shall include:

Vehicle identification.

Date.

Project.

Identification of material.

Gross, tare and net weights.

Signed by the bituminous concrete producer.
Stamped by a licensed public weighmaster.

NDAUWA WN

Material test results performed by a certified laboratory shall be submitted to the Engineer
for crushed gravel subbase proposed for the project. If required by the Engineer, samples
shall be submitted to the Engineer.

PART2-PRODUCTS

2.01 CRUSHED GRAVEL SUBBASE:

A. Crushed gravel subbase shall conform to NHDOT Item 304.3 Crushed Gravel, or Item
304.4 Crushed Stone (Fine Gradation).
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2.02 BITUMINOUS CONCRETE PAVEMENT:

A. The type of bituminous pavement courses to be utilized on this project shall be:

Roadway Pavement Section

Layer Description Thickness (inches)
Temporary Pavement (Single Course)
NHDOT 12.5mm Superpave 3” Arterial Streets
(50 Gyration Design)

2” Residential Streets

Permanent Wearing Course

NHDOT 9.5 mm Superpave 1-1/2” Arterial &
(75 Gyration Design) Residential Streets
Permanent Binder Courses

NHDOT 19 mm Superpave 5-1/2” Arterial Streets
(50 Gyration Design)

3-1/2” Residential
Streets

B. The joint sealant shall be a hot poured rubberized emulsified asphalt sealant meeting
the requirements of Federal Specifications SS-S-1401 or SS-S-164.

C. TACK COAT:

A.
B.

E.

F.

The tack coat shall be an asphalt emulsion, RS-1.

The Tack Coat shall be applied to all vertical seams and joints, and between
the bituminous binder and wearing course layers.

The surface to which the Tack Coat will be applied shall be prepared as
detailed in the NHDOT, Standard Specifications 410.3.3.1.

The Tack Coat shall be applied as detailed in the NHDOT Standard
Specifications 410.3.4.1

The Tack Coat shall be applied at a rate as detailed in the NHDOT Standard
Specifications 410.3.4.1.1, and as approved by the Engineer.

The Tack Coat shall be considered subsidiary to the pavement items of work..

2.04 CURBING:

A. Curbing shall conform to the requirements of NHDOT Standard Specifications 609, Items
609.01 or Item 609.02 as detailed on the plans..

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