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Summary

CHANGE IN CONTRACT PRICE:

Original Contract Price

$

CHANGE IN CONTRACT TIMES:
Original Contract Times

Substantial completion:
Ready for final payment:

Net changes from previous Change Orders

$

Net change from previous Change Orders

Contract Price prior to this Change Order

$

Contract Times prior to this Change Order

Substantial completion:
Ready for final payment:

Net Increase (deerease} of this Change Order

$

Net Increase (deerease) of this Change Order

Contract Price with all approved Change Orders

Contract Times with all approved Change Orders

$ Substantial completion:
Ready for final payment:
RECOMMENDED: ACCEPTED: APPROVED:

By: By: By:

Sanborn, Head & Associates Name Mayor Jim Donchess

Engineer Contractor Owner
(Authorized Signature) (Authorized Signature) (Authorized Signature)

Date: Date: Date:

Change Order # 2 of 2

CERTIFICATE OF SUBSTANTIAL COMPLETION

PROJECT:

OWNER’S CONTRACT NO:

DATE OF ISSUANCE:
OWNER: City of Nashua, NH

OWNER’s Purchase Order NO.::

CONTRACTOR:

ENGINEER: Sanbom, Head & Associates

This Certificate of Substantial Completion applies to all Work under the Contract Documents or to the
following specified parts thereof:

TO City of Nashua
(OWNER)
And To
(CONTRACTOR)

The Work to which this Certificate applies has been inspected by authorized representative of OWNER,
CONTRACTOR, and ENGINEER, and that Work is hereby declared to be substantially complete in
accordance with the Contract Documents on

(DATE OF SUBSTANTIAL COMPLETION)

A Tentative list of items to be completed or corrected is attached hereto. This list may not be all-inclusive,
and the failure to include an item in it does not alter the responsibility of CONTRACTOR to complete all
the Work in accordance with the Contract Documents. The items in the tentative list shall be completed or
corrected by CONTRACTOR within days of the above date of Substantial Completion.

From the date of Substantial Completion the responsibilities between OWNER and CONTRACTOR for
security, operation, safety, maintenance, heat, utilities, insurance and warranties and guarantees shall be as
follows:

1 of 2
Certificate of Substantial Completion

RESPONSIBILITIES

OWNER: City of Nashua

CONTRACTOR:

The following documents are attached to and made a part of this Certificate:

[For items to be attached see definition of Substantial Completion as supplemented and other specifically
noted conditions precedent to achieving Substantial Completion as required by Contract Documents.}

This certificate does not constitute an acceptance of Work not in accordance with the Contract Documents
nor is it a release of CONTRACTOR’s obligation to complete the Work in accordance with the Contract

Documents.
Executed by ENGINEER on ,20-
(ENGINEER)
By:
(Authorized Signature)
CONTRACTOR accepts this Certificate of Substantial Completion on, , 20
(CONTRACTOR)
By:
(Authorized Signature)
OWNER accepts this Certificate of Substantial Completion on ,20_
(For the City of Nashua)
By:

(Authorized Signature)

2 of 2
Certificate of Substantial Completion

DIVISION 9

TECHNICAL SPECIFICATIONS

| HEAD

Building Trust. Engineering Success.

SANBORN |

TECHNICAL SPECIFICATIONS

PHASE III LANDFILL EXPANSION

Four Hills Landfill
Nashua, New Hampshire
Solid Waste Permit No. DES-SW-SP-95-002

Nashua

ae NEW HAMPSHIRE’S GATE CITY

Prepared for Waste Management of New Hampshire, Inc.
File No. 3066.09
December 2017

SANBORN, HEAD & ASSOCIATES, INC. www.sanbornhead.com

TABLE OF CONTENTS

Technical Specifications

Division 2 - Sitework
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 - GGomembrane
Section 02560 - Interface Strength Testing
Section 02710 - Culverts
Section 02830 - Topsoil, Hydroseeding, and Turf Establishment
Section 02950 - Cleanup and Site Restoration

Division 3 - Concrete
Section 03300 - Cast-in-Place Concrete
Section 03310 - Concrete Coatings
Section 03400 - Precast Concrete Structures

Division 6 - Wood and Plastic
Section 06210 - Wood Framing and Insulation

Division 8 - Doors
Section 08100 - Metal Doors and Frames
Section 08712 - Door Hardware

Division 11 - Equipment
Section 11318 - Pumps

Division 15 - Mechanical
Section 15210 - High Density Polyethylene Pipe, Fittings, and Appurtenances
Section 15212 — Polyvinyl Chloride (PVC) Pipe, Valves, and Fittings
Section 15310 - Sump Riser Building Pipe, Fittings, and Appurtenances

Division 16 - Electrical
Section 16000 - Electrical Work
Section 16440 - Panelboards
Section 16500 - Instrumentation and Controls

P:\3000s\3066.09\Source Files\Type Il App\App C - Tech Specs\Contents specs.doc

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

nN

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