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CHANGE ORDER

PROJECT:

OWNER’S CONTRACT NO:

EXECUTED CONTRACT DATE:

DATE OF ISSUANCE:

EFFECTIVE DATE:

OWNER:

OWNER’s Purchase Order NO.:

City of Nashua, NH

Upon City Approval

CONTRACTOR:

ENGINEER:

You are directed to make the following changes in the Contract Documents:

Description:

Justification:

Change Order #

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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 (decrease) 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 #

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CERTIFICATE OF SUBSTANTIAL COMPLETION

PROJECT:

OWNER’S CONTRACT NO:

DATE OF ISSUANCE:
OWNER: City of Nashua, NH

OWNER’s Purchase Order NO.:

CONTRACTOR:

ENGINEER: DPW Engineering

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:

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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)
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Certificate of Substantial Completion

DIVISION 9

TECHNICAL SPECIFICATIONS

ITEM 203.112 — Street Patch
A. SCOPE

This work includes removing damaged asphalt by milling, saw cutting, or jack hammering as
determined by the Engineer. If removal extends to the subbase, the subbase shall be compacted
to 95% density prior to placing new asphalt.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, or the latest approved NHDOT Standard Specifications for Road and Bridge
Construction. The most stringent specification shall apply. Transportation and disposal of the
removed material shall be the responsibility of the Contractor.

This work includes, milling, saw cutting, or jack hammering to remove damaged asphalt, and
compacting subbase to 95% density when required. Limits of work shall be marked by the
Engineer. Placement of asphalt will be under Item 403.12.

Contractor shall use a 1 ton steel drum roller or heavier to achieve required compaction. A hand
compactor shall be used to compact areas inaccessible to the roller.

C. MEASUREMENT AND PAYMENT
This item will be paid per Square Yard of asphalt placed and compacted as measured in the field.
No payment will be made for materials delivered and not placed. Payment shall include full

compensation for material, equipment and labor to complete this portion of the Bid Schedule.

Contractor shall measure the square yards of material placed and compacted for each street.
Payment is contingent upon submittal of quantities in a per street format.

ITEM 304.112 - RECLAIMED STABILIZED BASE PROCESSED IN PLACE, 12” DEEP
A. SCOPE

This work shall consist of scarifying, if necessary, and pulverizing the existing pavement
together with subbase material to a depth of 12 inches, removal and disposal of excess reclaim
material, fine grading to elevations provided or as directed by the Engineer, and compaction of
materials to required densities. There will be approximately three inches of excess material to be
removed in order to accommodate three inches of asphalt. The material removed from this
operation shall remain the property of the City of Nashua and shall be transported and stock piled
by the contractor at the Four Hills Landfill at 830 West Hollis St in Nashua. This work will also
include installing and maintaining survey stakes at 25 foot intervals for edge of pavement and
centerline. Survey stakes shall be marked to clearly identify proposed elevations.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for reclaimed
stabilized base, processed in place, in accordance with relevant provisions of section 306 of the
NHDOT Standard Specifications for Road and Bridge Construction, latest edition.

Compaction shall be accomplished using a vibratory sheep’s foot roller or pad foot roller with at
least 50,000 Ibs. of dynamic force. Final rolling shall be accomplished by a smooth steel wheel
vibratory roller with at least 27,000 lbs. of dynamic force. Contractor shall also provide
compaction equipment sufficient to achieve required densities in areas not accessible by larger
equipment.

Fine grading to proposed grades shall be subsidiary. Removal, transportation, and disposal of
approximately 3” of material are subsidiary.

After site has been fine graded, compacted, and survey stakes installed, the Contractor will allow
1 day for grades to be verified. In no case shall paving be scheduled prior to verification of
proposed grades.

All catch basins must be protected from reclaimed materials by use of a silt sack. All materials,
labor, equipment, and transportation necessary to install, maintain, and remove the silt sacks
shall be subsidiary.

C. MEASUREMENT AND PAYMENT
Reclaimed stabilized base in place, 12 inch deep shall be paid by the square yard and shall

include full compensation for material, equipment, labor, and transportation required to complete
this portion of the Bid Schedule.

ITEM 403.11 -HOT BITUMINOUS PAVEMENT, MACHINE METHOD
A. SCOPE

This work shall consist of furnishing and placing bituminous pavement including shim pavement
to the depth shown on the plans or ordered by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, and NHDOT Sections 401, 403, and 411 Modified By City of Nashua in Appendix
A. The most stringent specifications shall apply.

Surface preparation shall be subsidiary and shall include (but is not limited to) weed removal,
occasional pruning of trees, and removal of any vegetation impeding the placement of
bituminous pavement. The existing surface shall be thoroughly dry and swept free of all dust,
dirt and loose material (including winter sand).

A tack coat shall be applied immediately prior to placement of hot bituminous pavement. Tack
shall also be applied to every cold joint on driveways, side streets, and where directed by the

Engineer. Tack is subsidiary.

The Contractor shall prevent any materials from entering drainage structures and shall clean out
structures as directed by the Engineer if materials enter them.

The Contractor shall correct drainage problems, as directed by the Engineer, when problems can
be corrected by placing asphalt.

All pavement shall be of the same mix design.

Binder grade will be PG 64-28 unless otherwise specified by the Engineer.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed, compacted, sampled, and cored hot bituminous
pavement, machine method as approved by the Engineer. No payment will be made for materials

delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Payment is
contingent upon submittal of quantities in a per street format.

ITEM 403.12 -HOT BITUMINOUS PAVEMENT, HAND METHOD
A. SCOPE

This work shall include paving using the hand method for areas where it is impractical to pave
using machine method, where shown on the plans, or as ordered by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction and NHDOT Sections 401, 403, and 411 Modified by City of Nashua in Appendix
A. The most stringent specification shall apply.

All surface preparation shall be subsidiary to this item. The existing surface shall be thoroughly
dry and swept free of all dust, dirt and loose material (including winter sand).

A tack coat shall be applied immediately prior to placement of hot bituminous pavement. Tack
shall also be applied to every cold joint, and where directed by the Engineer. Tack is subsidiary.

Contractor shall use a 1 ton steel drum roller or heavier to achieve required compaction.

Binder grade will be PG 64-28 unless otherwise shown on the plans or specified by the Engineer.
Asphalt mix design shall be approved by the Engineer.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed and compacted hot bituminous pavement, hand method
as approved by the Engineer. No payment will be made for materials delivered but not placed.

Contractor shall measure the square yards of material placed and compacted. Street station and
offsets shall be included with each area measurement. Contractor shall record the tons of
material placed and compacted for each street. Payment is contingent upon submittal of
quantities in a per street format with respective station and offset values.

ITEM 404.11 —-MICRO-SURFACING
A. SCOPE

Work shall include all labor, materials, equipment, and transportation required for surface
preparation and placement of a thin overlay (micro-surface) as shown on the plans and as
directed by the Engineer.

B. MATERIALS

Emulsified Asphalt

The emulsified asphalt shall be a quick-set, polymer-modified cationic type CSS-1H emulsion,
and shall conform to the requirements specified in AASHTO M208 and ASTM 2397. It shall
pass all applicable storage and settlement tests. The polymer shall be milled into the emulsion,
or in the case of the HiMA (6% SBS) emulsion, may be blended into the unmodified base
asphalt. The cement mixing test shall be waived for this emulsion.

Fiber-Reinforced Micro-Surfacing Residue Properties

For fiber-reinforced mixtures, emulsion testing by distillation method (ASTM D5 or AASHTO
T49) shall yield Penetration values of between 40 and 120 dmm at 77 degrees F, and a Softening
Point (ASTM D36 or AASHTO T53) not less than 135 degrees F.

HiMA (6% SBS) Micro-Surfacing Residue Properties

For HiMA mixtures, emulsion testing by distillation method (ASTM D5 or AASHTO T49) shall
yield a Softening Point (ASTM D36 or AASHTO T53) not less than 170 degrees F.

Aggregate
The mineral aggregate used shall be of the type and grade specified for micro-surfacing. The
aggregate shall be manufactured crushed stone such as granite, slag, limestone, chat, or other

high quality aggregate or combination thereof.

Aggregate Physical Requirements

Grading: The aggregate including natural fines when tested by AASHTO methods T11 or T27
or ASTM C117 or C136, should meet the referenced gradation requirements.

Deleterious Substances: To limit the permissible amount of clay-like fines in an aggregate, a
sand equivalency value of 65 or higher is required when tested by ASTM 2419.

Soundness: The aggregate shall have a weighted loss of not more than 15% when the sodium
sulfate test is used, or 20% when the magnesium sulfate test is used.

Hardness: The aggregate wear, from resistance to abrasion, shall be a maximum of 35% when
using AASHTO T96 or ASTM C131 test methods.
Water