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CONTENTS

DIVISION 2 - SITE WORK

Section 02000 - Erosion and Sedimentation Control
Section 02050 - Dust Control and Work Area Maintenance
Section 02100 - Grubbing and Topsoil Removal

Section 02200 - Earthwork

Section 02510 - Nonwoven Geotextiles

Section 02520 - Drainage Geocomposite

Section 02530 - Geosynthetic Clay Liner

Section 02550 - Gcomembrane

Section 02560 - Interface Strength Testing

Section 02710 - Culverts

Section 02830 - Topsoil, Hydroseeding, and Turf Establishment
Section 02950 - Cleanup and Site Restoration

SANBORN i HEAD

SECTION 02000

EROSION AND SEDIMENTATION CONTROL

PART 1 - GENERAL

1.1 SCOPE OF WORK

A.

CONTRACTOR shall furnish all labor, materials, tools and equipment, and
perform all operations necessary to provide erosion and sedimentation control
measures in accordance with the Drawings and Specifications.

1.2 PROJECT CONDITIONS

A.

CONTRACTOR shall perform the Work in such a manner as to prevent erosion
and the resulting sedimentation. The work area shall be graded, shaped, and
otherwise drained in a manner that limits soil erosion, siltation of drainage
swales, damage to vegetation damage to areas outside the work area.
CONTRACTOR shall implement and maintain erosion and sedimentation
control measures in accordance with all pertinent site and project stormwater
permit requirements, or as directed by OWNER or ENGINEER for the duration
of construction and until vegetative cover is provisionally accepted and such
measures are no longer required.

Erosion control methods shall be installed, maintained, and removed in
accordance with the Drawings, this specification, and the latest version of the
NH Stormwater Manual. The construction sequence shall be consistent with
the approved construction sequence contained in the Alteration of Terrain
Permit for this project.

1.3. SUBMITTALS

A.

CONTRACTOR shall submit to ENGINEER certification that the Sediment Filter
Logs and Erosion Control Blankets meet the required specifications at least 15
days prior to delivery of the material to the site.

CONTRACTOR shall submit to ENGINEER the proposed seed mix including the
manufacturer's certificate of compliance at least 15 days prior to seeding.

CONTRACTOR shall submit to ENGINEER a certified statement for approval as
to the number of pounds of materials (e.g., seed, lime, fertilizer, etc.) to be used
per 100 gallons of water. This statement shall also specify the number of
square feet of seeding that can be covered with the quantity of solution in the
hydroseeder.

CONTRACTOR shall submit for approval schedules for seeding and fertilizing
prior to the Work being performed.

File No. 3066.09 Erosion and Sedimentation Control 02000 - I of 4 December 2017

1.4

GENERAL METHODOLOGY

A.

Erosion and sedimentation control methods shall consider all factors that
contribute to erosion and sedimentation including, but not limited to, the
following:

Topographic features of the Project area.

Types, depth, slope and areal extent of the soils.

Proposed alteration of the area.

Amount of runoff from the Project area, borrow areas, and the
upgradient watershed areas.

Staging of earthmoving activities.

Temporary control measures and facilities for use during earthmoving.

PWNr

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PART 2 - PRODUCTS

2.1

MATERIALS

A.

Sediment Filter Logs

1. Sediment Filter Logs shall be a compost-filled bio- or photo-degradable
tubular mesh product capable of trapping sediment before or within the
device while allowing stormwater runoff to pass through.

2. The mesh shall be of natural biodegradable materials to avoid problems
with the sock trapping endangered snakes or lizards, such as
biodegradable jute, sisal, burlap, or coir fiber fabric.

3. |The mesh fabric shall must be clean, evenly woven, and free of encrusted
concrete or other contaminating materials and free from cuts, tears,
broken or missing yarns and thin, open, or weak places.
Each sediment Filter Log shall have a diameter of no less than 8 inches.
The mesh opening shall be no smaller than ¥% inch.
The compost shall be derived from green material consisting of chipped,
shredded, or ground vegetation, or clean recycled wood products, and be
reasonably free of visible contaminates. It shall not be derived from
mixed municipal solid waste and shall not contain paint, petroleum
products, pesticides or any other chemical residues harmful to animal life
or plant growth. The compost shall not possess objectionable odors.

7. The Sediment Filter Log must have a minimum durability of one year
after installation.

Dn

Erosion Control Blankets shall be a Rolled Erosion Control Product that
complies with Temporary Slope Stabilization Type C as defined Section 645 of
the NHDOT Specifications.

Mulch shall consist of cured straw free from primary noxious weed seeds,
twigs, debris and rough or woody materials. Mulch shall be free from rot or
mold and shall be acceptable to the ENGINEER or OWNER. Alternately, mulch
shall be specially processed cellulose homogeneous fiber containing no growth
or germination-inhibiting factors. Processed cellulose fiber shall be
manufactured in such a manner that after addition and agitation in slurry
tanks with water, the fibers in the material become uniformly suspended to

File No. 3066.09 Erosion and Sedimentation Control 02000 - 2 of 4 December 2017

form a slurry when sprayed on the ground. The material shall allow
homogeneous absorption and percolation of moisture. Each package of the
cellulose fiber shall be marked by the manufacturer to show the air dry weight
content. Mulch shall be utilized on all newly-graded subgrade and topsoil
areas that cannot be seeded within five (5) days.

PART 3 - EXECUTION
3.1 CONSTRUCTION SEQUENCE

A. Construction of erosion control measures shall be completed prior to any site
work.

B. Sediment barriers shall be used at storm drain inlets; across minor swales and
ditches; and at other applications where the structure is of a temporary nature
and structural strength is not required. Sediment barriers are temporary
berms, diversions, or other barriers that are constructed to retain sediment
on-site by retarding and filtering storm runoff.

C. All temporary erosion control measures shall be maintained throughout the
course of construction activities until provisional acceptance of the Site
vegetation by ENGINEER or OWNER, at which time CONTRACTOR shall
remove all remaining temporary erosion control structures, and properly
dispose of accumulated sediment at temporary or permanent erosion control
structures on-site in areas approved by OWNER.

D. OWNER, ENGINEER, or the CQA Consultant may require additional erosion and
sediment controls be installed or that temporary erosion and sediment
controls be replaced. CONTRACTOR shall comply with said request and
immediately install the required controls.

3.2 CONSTRUCTION METHODS

A. All temporary erosion control measures shall be installed as shown on the
Drawings or as directed by OWNER, ENGINEER, or the CQA Consultant in the
field.

B. All temporary erosion control measures shall be installed in accordance with
manufacturer’s instructions.

C. Straw mulch shall be applied at a rate of 100 Ibs/1000 ft?.

D. CONTRACTOR shall provide protection against washouts by an approved
method. Any washout that occurs either in the CONTRACTOR’s work area or in
areas topographically below the work shall be regraded and reseeded at
CONTRACTOR’s expense until an accepted vegetative stand is established.

File No. 3066.09 Erosion and Sedimentation Control 02000 - 3 of 4 December 2017

3.3 MAINTENANCE AND INSPECTION

A. Contractor shall inspect and document all temporary erosion control measures
as required by the Construction Stormwater Pollution Prevention Plan. Any
damaged erosion control measure shall be repaired/replaced promptly.

[END OF SECTION 02000]

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File No. 3066.09 Erosion and Sedimentation Control 02000 - 4 of 4 December 2017

General Terms and Conditions

DEFINITIONS Unless otherwise required by the context, "Professional Engineer’, and its
successors, transferees and assignees (together “Professional Engineer”) includes any of the
Professional Engineer's consultants, sub consultants, contractors, and subcontractors

PROFESSIONAL ENGINEER STATUS The parties agree that Professional Engineer shall have the
status of and shall perform all work under this contract as a Professional Engineer, maintaining
control over all its consultants, sub consultants, contractors, or subcontractors. The only contractual
relationship created by this contract is between the City of Nashua and Professional Engineer, and
nothing in this contract shall create any contractual relationship between the City of Nashua and
Professional Engineer's consultants, sub consultants, contractors, or subcontractors. The parties
also agree that Professional Engineer is not a City of Nashua employee and that there shall be no:

(1) Withholding of income taxes by the City of Nashua:

(2) Industrial insurance coverage provided by the City of Nashua;

(3) Participation in group insurance plans which may be available to employees of the
City of Nashua;

(4) Participation or contributions by either the Professional Engineer or the City of
Nashua to the public employee’s retirement system;

(5) Accumulation of vacation leave or sick leave provided by the City of Nashua;

(6) Unemployment compensation coverage provided by the City of Nashua.

STANDARD OF CARE Professional Engineer shall be responsible for the professional quality,
technical accuracy, timely completion, and coordination of all work performed under this contract.
Professional Engineer warrants that all work shall be performed with the degree of professional
skill, care, diligence, and sound practices and judgment that are normally exercised by recognized
professional firms with respect to services of a similar nature. It shall be the duty of Professional
Engineer to assure at its own expense that all work is technically sound and in conformance with
all applicable federal, state, and local laws, statutes, regulations, ordinances, orders, or other
requirements. [In addition to all other rights which the City of Nashua may have, Professional
Engineer shall, at its own expense and without additional compensation, re-perform work to correct
or revise any deficiencies, omissions, or errors in the work or the product of the work or which
result from Professional Engineer's failure to perform in accordance with this standard of care. Any
approval by the City of Nashua of any products or services furnished or used by Professional
Engineer shall not in any way relieve Professional Engineer of the responsibility for professtonal
and technical accuracy and adequacy of its work. City of Nashua review, approval, or acceptance
of, or payment for any of Professional Engineer's work under this contract shall not operate as a
waiver of any of the City of Nashua's rights or causes of action under this contract, and Professional
Engineer shall be and remain liable in accordance with the terms of the contract and applicable law.

Professional Engineer shall furnish competent and skilled personnel to perform the work under this
contract. The City of Nashua reserves the right to approve key personnel assigned by Professional
Engineer to perform work under this contract. Approved key personnel shall not be taken off of
the project by Professional Engineer without the prior written approval of the City of Nashua,
except in the event of termination of employment. Professional Engineer shall, if requested to do
so by the City of Nashua, remove from the job any personnel whom the City of Nashua determines
to be incompetent, dishonest, or uncooperative.

CITY OF NASHUA REPRESENTATIVE The City of Nashua may designate a City of Nashua
representative for this contract. If designated, all notices, project materials, requests by

GC 2 of ll

SECTION 02050

DUST CONTROL AND WORK AREA MAINTENANCE

PART 1 - GENERAL

1.1 SCOPE OF WORK

A.

Dust control shall be of paramount importance during construction.
CONTRACTOR shall perform operations and maintain the site, including haul
roads, so that the creation and dispersion of dust is limited to the degree
practical. Dust control shall be implemented throughout the duration of the
Project.

CONTRACTOR is responsible for maintaining the haul roads and the work area.
Haul road maintenance shall be performed to ensure safe and efficient access.
Work area maintenance also shall include the protection of monitoring wells,
and other infrastructure installed at the site.

PART 2 - PRODUCTS

2.1 MATERIALS

A.

B.

C.

CONTRACTOR shall use a watering truck as approved by OWNER.

Water for dust control shall be obtained from locations designated by the
OWNER.

Chemical dust suppressants shall not be used.

PART 3 - EXECUTION

3.1 GENERAL

A.

CONTRACTOR shall implement strict dust control measures during active
construction periods. These control measures will generally consist of water
applied as often as necessary to limit dust emissions, often numerous times per
day during dry weather, or as directed by OWNER, ENGINEER, or the CQA
Consultant.

Existing access roads shall be used by CONTRACTOR whenever possible, so as
not to interfere with on-going landfill operations or deliveries to the active
landfill face. If new haul roads are required to access work areas, then
CONTRACTOR shall obtain approval from OWNER prior to their construction.
Haul roads used during the execution of Work, whether temporary haul roads
created by CONTRACTOR or existing site roads, shall be maintained by

File No. 3066.09 Definitions 02050 - 1 of 2 December 2017

CONTRACTOR. Unless otherwise approved by OWNER, temporary haul roads
shall be restored by smooth grading and seeding to re-establish vegetation.

C. Groundwater and landfill gas monitoring wells have been installed and are
located throughout the site. CONTRACTOR shall protect the wells from
damage during construction. Measures taken to protect the wells from damage
will include flagging and construction of barricades around the wells. Any well
damaged by construction activities will be replaced by OWNER at
CONTRACTOR’s expense.

[END OF SECTION 02050]

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File No. 3066.09 Definitions 02050 - 2 of 2 December 2017

SECTION 02100

GRUBBING AND TOPSOIL REMOVAL

PART 1 - GENERAL

1.1. SCOPE OF WORK

A.

This Work shall consist of grubbing, removing, and disposing of all vegetation
and debris including stumps, branches, and shrubs, within the limits of Work
shown on the Drawings or specified below.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 CONSTRUCTION REQUIREMENTS

A.

B.

No trees shall be cut outside of the work area designated on the Drawings.

CONTRACTOR shall install erosion and sediment controls in areas
topographically below areas, that will be disturbed and shall perform the Work
in a manner that limits erosion and sedimentation. CONTRACTOR shall cease
work and install additional erosion and sediment control measures if directed
by OWNER, ENGINEER, or the CQA Consultant.

Grubbing shall include the removal of brush, stumps, and large roots to a depth
of 2 feet below subgrade unless otherwise directed by ENGINEER or OWNER.
In order to conserve topsoil, CONTRACTOR shall make use of rake teeth on
bulldozers in the process of removing stumps and brush unless other
equipment is allowed by OWNER.

Stumps, large roots, branches, other wood, brush, weeds, grass and other
perishable material resulting from the clearing and grubbing operations shall
be disposed of in an on-site area designated by OWNER.

CONTRACTOR shall strip topsoil for subsequent reuse. Topsoil shall be
stockpiled on-site in an area approved by OWNER.

[END OF SECTION 02100]

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File No. 3066.09 Grubbing and Topsoil Removal 02100 - 1 of 1 December 2017

SECTION 02200
EARTHWORK
PART 1 - GENERAL
1.1 SCOPE OF WORK

A. CONTRACTOR shall provide all labor, materials, equipment and incidentals
necessary to perform the earthwork required to complete the Work shown on
the Drawings and specified herein, including, but not limited to: excavation,
placement, grading, and compaction of earth materials; sampling and testing
(laboratory and field) earth materials; and disposal and stockpiling of surplus
soil.

B. CONTRACTOR shall work with the Construction Quality Assurance (CQA)
Consultant and provide assistance as needed so that the required quality
assurance sampling and testing may be performed. Quality assurance
activities shall be considered germane to the Work and not be a cause for
scheduling delays. Quality assurance requirements are defined in the
Construction Quality Assurance Plan.

1.2 SUBMITTALS

A. Prior to initiating interface strength tests (See Section 02560), CONTRACTOR
shall provide the following information to ENGINEER:
1. the proposed material source or sources (either on-site or off-site); and
2. laboratory test data in conformance with the requirements of Part 2.2.

B. Following approval of materials by ENGINEER, CONTRACTOR shall provide the
testing laboratory with samples of each type of soil to be tested for interface
strength.

C. As soon as the information is available, CONTRACTOR shall provide ENGINEER
the results of field and laboratory tests performed on soil. Test reports of field
tests are to be submitted by the following morning.

D. If Work is interrupted for reasons other than inclement weather, then
CONTRACTOR shall notify ENGINEER a minimum of 24 hours prior to the
resumption of Work.

File No. 3066.09 Earthwork 02200 - 1 of 14 December 2017