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2.05 SIDEWALKS:

A. Sidewalks shall conform to the requirements of NHDOT Standard Specifications 608, Items
608.12 or Item 608.24 as detailed on the plans..

2.06 PAVEMENT MARKINGS:

A. Pavement markings shall conform to the requirements of NHDOT Standard Specifications
632, and shall be considered incidental to the pavement items of work.

B. The mixture of the marking material shall be within the composition limits for reflectorized
pavement markings as described in the NHDOT Standard Specifications.

PART3 EXECUTION

3.01 GENERAL:

A. _ Paving courses required for the project shall be as shown on the drawings and as specified
herein. Pavement thicknesses specified are measured in compacted inches. If a pavement
course thickness exceeds 2-1/2 compacted inches, the course shall be installed in multiple
lifts with each lift not exceeding 2-1/2 compacted inches in thickness.

3.02 GRAVEL SUBBASE:

A. The crushed gravel subbase to be placed under pavement shall consist of the specified
thickness of crushed gravel evenly spread and thoroughly compacted.

B. _ The gravel shall be spread in layers not more than 6-inches thick, compacted measure. All
layers shall be compacted to not less than 95 percent of the maximum dry density of the
material as determined by ASTM D1557 Method C at optimum moisture content.

3.03 TEMPORARY BITUMINOUS PAVEMENT:

A. Where specified and directed by the Engineer and after placement of the Crushed gravel
sub-base, the Contractor shall place temporary bituminous pavement above the trench,
between the edges of the existing pavement. It shall consist of a course of 4” (12.5 mm) Hot
Bituminous Pavement mix, of the thickness specified on the plans, in accordance with
NHDOT Standard Specifications Section 401.

B. The temporary pavement shall be repaired as necessary to maintain the surface of the
pavement until replaced by permanent pavement. When so directed by the Engineer, the
Contractor shall remove the temporary pavement and install or regrade the sub-base for
installation of permanent pavement.

3.04 PERMANENT BITUMINOUS PAVEMENT:

A. The bituminous paving mixture, equipment, methods of mixing and placing, and the
precautions to be observed as to weather, condition of base, etc., shall be in accordance
with NHDOT Standard Specifications Section 401. The permanent pavement patch shall be
constructed as detailed on the plans.

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B. BASE COURSE AND BINDER COURSE PAVEMENT:

1. Immediately prior to installing the base and/or binder course, the trimmed edges shall
be made stable and unyielding, free of loose or broken pieces and all edges shall be
thoroughly broomed clean. Contact surfaces of trench sides, curbings, manholes,
catch basins, or other appurtenant structures in the pavement shall be painted
thoroughly with a uniform coating of asphalt emulsion (tack coat), just before any
mixture is placed against them.

2. The binder course shall be repaired as necessary to maintain the surface of the
pavement until placement of the permanent overlay. If required, the Contractor shall
place a leveling course before placing the permanent overlay.

C. TOP COURSE OR SURFACE TREATMENT PAVEMENT :

1. Top course or surface treatment shall be placed over the full width as shown on
the drawings or as specified.

2. Prior to placement of the top course or surface treatment, the entire surface over
which the top course or surface treatment is to be placed shall be broom cleaned and
tack coated.

3. Top course or surface treatment pavement placed over trenches may be feathered to
meet existing paved surfaces, if approved by the Engineer.

3.05 PAVEMENT PLACEMENT:

A. Unless otherwise permitted by the Engineer for particular conditions, only machine
methods of placing the pavement shall be used. The equipment for spreading and finishing
shall be mechanical, self-powered pavers, capable of spreading and finishing the mixture
true to line, grade, width and crown. The mixtures shall be placed and compacted only at
such times as to permit proper inspection and checking by the Engineer.

B. After the paving mixtures have been properly spread, initial and intermediate compaction
shall be obtained by the use of steel wheel rollers having a weight of not less than 240
pounds per inch width of tread.

C. — Final rolling of the top course or surface treatment pavement shall be performed by a steel
wheel roller weighing not less than 285 pounds per inch width of tread at a mix
temperature and time sufficient to allow for final smoothing of the surface and thorough
compaction.

D. Immediately after placement of top course or surface treatment pavement, all joints
between the existing and new top course or surface treatment pavements shall be sealed
with hot poured rubberized asphalt sealant meeting the requirements of Federal
Specification SS-S-1401 or SS-S-164.

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maintain and complete work in accordance with the requirements of the contract or determination
of the City of Nashua. Professional Engineer is responsible for requesting clarification or
interpretation and is solely liable for any cost or expense arising from its failure to do so.

TERMINATION OF CONTRACT

A. TERMINATION, ABANDONMENT, OR SUSPENSION AT WILL. The City of Nashua, in its sole
discretion, shall have the right to terminate, abandon, or suspend all or part of the project and
contract at will. If the City of Nashua chooses to terminate, abandon, or suspend all or part of the
project, it shall provide Professional Engineer 10 day’s written notice of its intent to do so.

If all or part of the project is suspended for more than 90 days, the suspension shall be treated as a
termination at will of all or part of the project and contract.

Upon receipt of notice of termination, abandonment, or suspension at will, Professional Engineer
shall:

—

Immediately discontinue work on the date and to the extent specified in the notice.

2. Place no further orders or subcontracts for materials, services, or facilities, other than as
may be necessary or required for completion of such portion of work under the contract
that is not terminated.

3. Immediately make every reasonable effort to obtain cancellation upon terms satisfactory
to the City of Nashua of all orders or subcontracts to the extent they relate to the
performance of work terminated, abandoned, or suspended under the notice, assign to
the City of Nashua any orders or subcontracts specified in the notice, and revoke
agreements specified in the notice.

4. Not resume work after the effective date of a notice of suspension until receipt of a

written notice from the City of Nashua to resume performance.

In the event of a termination, abandonment, or suspension at will, Professional Engineer shall
receive all amounts due and not previously paid to Professional Engineer for work satisfactorily
completed in accordance with the contract prior to the date of the notice and compensation for work
thereafter completed as specified in the notice. No amount shall be allowed or paid for anticipated
profit on unperformed services or other unperformed work.

B. TERMINATION FOR CAUSE This agreement may be terminated by the City of Nashua on 10
calendar day’s written notice to Professional Engineer in the event of a failure by Professional
Engineer to adhere to any or all the terms and conditions of the contract or for failure to
satisfactorily, in the sole opinion of the City of Nashua, to complete or make sufficient progress on
the work in a timely and professional manner, Professional Engineer shall be given an opportunity
for consultation with the City of Nashua prior to the effective date of the termination. Professional
Engineer may terminate the contract on 10 calendar days written notice if, through no fault of
Professional Engineer, the City of Nashua fails to pay Professional Engineer for 45 days after the
date of approval by the City of Nashua of any Application for Payment.

Upon receipt of notice of termination for cause, Professional Engineer shall:

1. Immediately discontinue work on the date and to the extent specified in the notice.

2. Provide the City of Nashua with a list of all unperformed services.

3. Place no further orders or sub-contracts for materials, services, or facilities, other than as
may be necessary or required for completion of such portion of work under the contract
that is not terminated.

4. Immediately make every reasonable effort to obtain cancellation upon terms satisfactory
to the City of Nashua of all orders or sub contracts to the extent they relate to the

GC 4 of It

3.06

A.

3.07

3.08

3.09

When directed by the Engineer, the Contractor shall furnish and install additional paving to
provide satisfactory transition for driveways and walkways impacted by a new curb-to-curb
pavement installation. The transition installation will be considered incidental to the
curb-to-curb pavement installation.

RAISING AND ADJUSTING CASTINGS:

In areas of permanent top course paving, existing municipally-owned catch basin and
manhole castings and valve boxes shall be raised to the proper grade where directed by the
Engineer.

Castings owned by private utilities shall be raised by their own forces. The Contractor
shall be responsible for coordinating this work.

The method of adjusting these castings shall be as follows: Cut around catch basin or
manhole castings a minimum of 8-inches from casting. Excavate and if required rebuild up to
18-inches of masonry below the bottom of the casting. Backfill with suitable material and
compact to bottom of casting. Place high, early strength cement or bituminous
concrete collar, as directed, to approximately 1 1/2-inches below the raised casting grade.
Masonry work shall conform to Section 02631, PRECAST MANHOLES.

In some areas, raising of castings may not be required. Where directed by the Engineer,
castings not to be raised shall have at least 12-inches of bituminous concrete pavement
chipped and removed around the casting. New bituminous concrete pavement shall be
placed and compacted around such castings to approximately 1-1/2-inches below the top of
the casting. The overlay course shall then be sloped down to the level of the casting.

The method of raising valve boxes shall be as follows: Cut around valve box a minimum of
8-inches from valve box. Excavate as required and raise the valve box. Pour high early
strength cement or bituminous concrete collar, as directed, to approximately 1-1/2-inches
below the top of the valve box.

Castings which need to be raised or adjusted to complete permanent curb to curb paving
shall be done immediately prior to paving.

CURBING:

The Contractor shall install curbing in accordance with the Construction Requirements as
specified in NHDOT Section 609.

SIDEWALKS:

The Contractor shall install sidewalks in accordance with the Construction Requirements as
specified in NHDOT Section 608.

PAVEMENT MARKINGS:

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A. The Contractor shall replace all pavement markings removed or covered-over in carrying out
the work, and as directed by the Engineer, no sooner than 48 hours after completion of
permanent pavement. The markings and respective mixture and application requirements
shall conform to the requirements of NHDOT Standard Specifications Section 632.

B. When directed by the Engineer, the Contractor shall provide temporary markings at no
additional cost to the Owner.

3.10 PAVEMENT REPAIR:
A. — If required in the contract or if permanent pavement becomes rough or uneven, permanent
pavement patches and trenches shall be repaired and brought to grade utilizing "infrared"

paving methods following completion of the construction.

B. The Contractor performing the work shall use care to avoid overheating the pavement
being repaired.

C. Pavement repair shall extend a minimum of 6-inches beyond all edges of the pavement
patch to assure adequate bonding at the pavement joints.

END OF SECTION

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SECTION 02800

MANHOLE REHABILITATION

PART 1 - GENERAL

1.01

A.

1.02

1.03

SCOPE OF WORK:

Provide all labor, materials, accessories, equipment, tools, and incidentals required to
rehabilitate and test manholes as shown on the Drawings and as specified herein,
including interior manhole surface preparation, decanting and disposal of debris at the
City landfill, flow diversion, inflow control, invert and invert reconstruction, internal
cement or epoxy lining system, and pipe connections.

The manhole rehabilitation products shall be fabricated from materials which, when
installed, shall mitigate or terminate infiltration and shall be chemically-resistant to
withstand exposure to domestic sewage.

RELATED WORK SPECIFIED ELSEWHERE:
Section 01330 — Submittals
REFERENCE SPECIFICATIONS, CODES, AND STANDARDS:

Without limiting the generality of the other requirements of the Specifications, all
work herein shall conform to the applicable requirements of the following
documents. All referenced specifications, codes, and standards refer to the most
current issue available at the time of Bid.

1. ASTM C109 Standard Test Method for Compressive Strength of
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
Specimens)

2. ASTM C273 Standard Test Method for Shear Properties of Sandwich
Core Materials

3. ASTM €293 Standard Test Method for Flexural Strength of Concrete
(Using Simple Beam With Center-Point Loading)

4. ASTM C496 Standard Test Method for Splitting Tensile Strength of
Cylindrical Concrete Specimens

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10.

11.

12.

13.

14.

ASTM C882 Standard Test Method for Bond Strength of Epoxy-Resin
Systems Used With Concrete By Slant Shear

ASTM C1244 Standard Test Method for Concrete Sewer Manholes by the
Negative Air Pressure (Vacuum) Test Prior to Backfill

ASTM D412 Standard Test Methods for Vulcanized Rubber and
Thermoplastic Elastomers — Tension

ASTM D624 Standard Test Method for Tear Strength of Conventional
Vulcanized Rubber and Thermoplastic Elastomers

ASTM D638 Standard Test Method for Tensile Properties of Plastics

ASTM D695 Standard Test Method for Compressive Properties of Rigid
Plastics

ASTM D790 Standard Test Methods for Flexural Properties of
Unreinforced and Reinforced Plastics and Electrical
Insulating Materials

ASTM D2240 Standard Test Method for Rubber Property — Durometer
Hardness

ASTM D4787 Standard Practice for Continuity Verification of Liquid or
Sheet Linings Applied to Concrete Substrates

ASTM D7234 Standard Test Method for Pull-Off Adhesion Strength of
Coatings on Concrete Using Portable Pull-Off Adhesion
Testers

1.04 SUBMITTALS:

A. Shop Drawings: The Contractor shall submit the following for the manhole rehabilitation
products in accordance with the requirements set forth in pertinent sections:

1.

Physical and chemical properties

2. Material composition

3. Confirmation of conformance to applicable reference standards

4. MSDSs

5. Warranty information
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6. Instructions for installation and repair

7. Manufacturer’s statement of compatibility between epoxy coating and
cementitious base coat.

8. The qualifications of the Contractor shall be submitted to the Engineer for
evaluation prior to commencement of work. These qualifications shall include
detailed descriptions of the following:

a. Name, business address, and telephone number of the Contractor

b. Name(s) of all supervisory personnel that will be directly involved in the
Project

c. Proposed product information showing compliance with the specified
requirements listed herein, including chimney seal, grout, and internal liner
material, and the respective manufacturer’s installation instructions.

d. Documentation of certification of the Contractor, specialty technician,
and/or installer by the product manufacturer and/or its authorized
representative

e. A reference list of previous projects on which the Contractor and/or installer
has rehabilitated manholes over the last two years, including project name,
project number, customer name, owner’s contact information (name and
phone number), and the number of manholes rehabilitated

f. To be acceptable, the Contractor/installer must have had a minimum of 500
manhole rehabilitation product installations and a minimum of five (5) years
of active experience in the commercial installation of the products.

g. The Contractor shall sign and date the information provided and certify that,
to the extent of his knowledge, the information is true and accurate and that
the supervisory personnel will be directly involved with and used on the
Project. Substitutions of personnel and/or methods will not be allowed
without prior written authorization by the Owner and Engineer.

1.05 WARRANTY:

A. All rehabilitation systems shall be warranted by the applicator and/or manufacturer
against failure for a minimum of two (2) years after acceptance by the Owner; in no case
shall the warranty be less than the manufacturer’s published standard warranty period.

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B. Failure will be deemed to have occurred if the grout fails to prevent groundwater
infiltration or prevent the internal deterioration or corrosion of the manhole. If any such
failure occurs within the warranty period, the damage shall be repaired by the Contractor
in a manner satisfactory to the Engineer at no cost to the Owner within 60 days after
written notification of the failure. The repaired grout application shall have an additional
2 years duration warranty period starting on the date of repair.

PART 2 - PRODUCTS

2.01 GENERAL:

A. The materials to be utilized in the rehabilitation of manholes shall be designed and
manufactured to withstand the corrosive effects of hydrogen sulfide in a wastewater
environment, prevent infiltration, and withstand constant and direct contact with flowing
wastewater.

2.02 INTERNAL-LINER SYSTEM (CEMENT):

A. The internal liner system shall be specifically designed for a minimum service life of 50
years, to continuously bond to the substrate, to withstand a temperature range of 0
degrees to 100 degrees Fahrenheit, to restore the interior of the manhole, to withstand the
corrosive gases of domestic wastewater (especially hydrogen sulfide), to eliminate the
infiltration of groundwater through the manhole walls and mortar joints, and to be
structurally capable of withstanding the pressure of groundwater based on the depth of the
specific manhole being lined.

B. The internal liner system shall consist of a hydrostatic leak correction, hydraulic cement
patching of voids and a cementitious final coating. Infiltration control, patching material,
and/or a cementitious coating coat may all be necessary depending on the extent of the
manhole corrosion, damage, substrate profile, loss of material, and infiltration. All
materials used shall be completely compatible with all other manhole rehabilitation
products being used. Contractor shall ensure compatibility of all products with the
individual material manufacturers.

C. Where necessary, infiltration control and patching materials shall be installed in
accordance with the lining manufacturer’s requirements prior to installing the lining
system to control active infiltration and repair voids in the existing manhole walls or
damaged inverts. Infiltration control and patching materials shall be rapid-setting, high
early strength, hand-applied cementitious materials for stopping infiltrating water and
making repairs to concrete, brick, or other masonry-constructed manholes. The materials
shall be non-shrinking, nonmetallic, and non-corrosive. The materials shall be

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2.03

compatible with the lining material used. Infiltration control and patching materials shall
be as manufactured by The Strong Company, Inc., Raven Lining Systems, Madewell
Products Corporation, Quadex, Inc., or Engineer-approved equal.

Cementitious coating shall be a pumpable, Portland-based microsilica cement or calcium
aluminate cement. Cementitious base coat shall be Raven 705CA by Raven Lining
Systems, Mainstay ML-72 by Madewell Products Corporation, or Engineer-approved
equal. Cementitious base coat, when cured, shall meet the following requirements at 28
days at a minimum:

1. Compressive Strength: 9,200 psi (per ASTM C109)

2. Tensile Strength: 685 psi (per ASTM C496)

3. Flexural Strength: 1,200 psi (per ASTM C293)

4. Minimum Finished Dry Thickness: As specified in 3.02, Paragraph H herein

5. Bond Strength: 2,000 psi (per ASTM C882)

INTERNAL-LINER SYSTEM (EPOXY):

The internal liner system shall be specifically designed for a minimum service life of 50
years, to continuously bond to the substrate, to withstand a temperature range of 0
degrees to 100 degrees Fahrenheit, to restore the interior of the manhole, to withstand the
corrosive gases of domestic wastewater (especially hydrogen sulfide), to eliminate the
infiltration of groundwater through the manhole walls and mortar joints, and to be
structurally capable of withstanding the pressure of groundwater based on the depth of the
specific manhole being lined.

The internal liner system shall be a 100 percent solids epoxy over a cementitious base
coat. Infiltration control, patching material, and/or a cementitious base coat may be
necessary depending on the extent of the manhole corrosion, damage, substrate profile,
loss of material, and infiltration. All! materials used shall be completely compatible with
all other manhole rehabilitation products being used. Contractor shall ensure
compatibility of all products with the individual material manufacturers.

Where necessary, infiltration control and patching materials shall be installed in
accordance with the lining manufacturer’s requirements prior to installing the lining
system to control active infiltration and repair voids in the existing manhole walls or
damaged inverts. Infiltration control and patching materials shall be rapid-setting, high

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