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1.3. SOIL TESTING AND CONSTRUCTION MONITORING

A.

Prior to and during placement of soil, the CQA Consultant may select areas
within the work limits for field compaction testing. CONTRACTOR shall
cooperate fully with the CQA Consultant during testing and shall allow the CQA
Consultant sufficient time to make necessary observations and tests.

OWNER will pay the CQA Consultant for testing. However, if test results
indicate inadequate compaction or earth materials not meeting the
Specifications, CONTRACTOR shall bear all costs associated with correcting
deficiencies in compacted materials to the satisfaction of the OWNER and the
CQA Consultant.

PART 2 - PRODUCTS

2.1 GENERAL

A.

The CQA Consultant shall collect soil samples for grain-size testing per ASTM
D422 and hydraulic conductivity tests (where applicable) per ASTM D2434 or
D5084 for each 3,000 cubic yards of each type of soil to be used in the Work.
In addition, the CQA Consultant will obtain a representative sample from each
source of the Drainage Sand for calcium carbonate testing. Soil materials not
meeting the requirements of this Section shall not be used in the Work. Test
methods for soil materials shall conform to the following, unless other
approved by the ENGINEER.

Particle-Size Analysis, with hydrometer - ASTM D422.

Atterberg Limits - ASTM D4318.

Standard Proctor - ASTM D698.

Hydraulic Conductivity - ASTM D2434 or D5084.

Internal Friction Angle - ASTM D3080.

We WNP

The final approval of a source for the soil will be at the sole discretion of
ENGINEER.

All earth materials unless otherwise specified, shall consist of suitable selected
and approved clean, well-graded granular soil.

All earth materials shall be substantially free from organic materials, wood,
trash, and other objectionable materials that may be compressible or that
cannot be properly compacted. Earth materials shall not contain stone blocks,
broken concrete, masonry rubble, or other similar materials. Earth materials
shall have the physical properties such that it can be readily spread and
compacted to the specified permeability and/or density. Snow, ice, and frozen
soil shall not be permitted.

File No. 3066.09 Earthwork 02200 - 2 of 14 December 2017

2.2

2.3

2.4

STRUCTURAL FILL

A.

Structural Fill shall be used for construction of embankments and general
raises-in-grade. Structural Fill shall be friable soil and shall be free of trash,
ice, snow, tree stumps, roots, and other organic material.

Structural Fill shall contain no stone greater than 8 inches in diameter and
contain no more than 50 percent of the material passing the No. 200 sieve.

Structural Fill placed within 6 inches of geosynthetics shall contain no stone
greater than 1-inch in diameter.

SCREENED TILL

A.

Screened Till shall be used to establish the landfill subgrade beneath the
geomembrane in the secondary liner system and where otherwise indicated on
the Drawings.

The Screened Till shall contain no stone greater than % inches in diameter, and
be free from ice and snow, roots, sod, clay, rubbish and other deleterious

Screened Till shall exhibit a hydraulic conductivity of less than 1 x 10+ cm/sec
when tested in accordance with ASTM D5084. Test specimens shall be
compacted at a moisture content that provides a density no less than 95
percent of the maximum dry density as determined by ASTM D698. Hydraulic
conductivity testing shall be performed at a normal stress of 89 pounds per
square inch (lb/in.?).

Screened Till shall exhibit an internal angle of friction of no less than 30
degrees when tested in accordance with ASTM D3080. Test specimens shall be
compacted at a moisture content and density matching that at which
acceptable hydraulic conductivity tests were performed. Testing shall be
performed at the following normal stresses of 22, 44, and 89 lb/in.2.

DRAINAGE SAND

A.

Drainage Sand shall be used as a soil component of the primary and secondary
liner systems and where otherwise specified on the Drawings.

Drainage Sand shall be free from ice and snow, roots, sod, clay, rubbish and
other deleterious or organic matter meeting the following grain size
requirements:

File No. 3066.09 Earthwork 02200 - 3 of 14 December 2017

Sieve Size Percent Passing by Weight
¥4-inch 100
No. 4 60 - 100
No. 10 40-95
No. 40 5-50
No. 100 0-17
No. 200 0-10

Drainage Sand shall provide a hydraulic conductivity greater than 1x10-+
cm/sec as measured by ASTM D2434.

Drainage Sand shall contain no more than 15 percent calcium carbonate as
measured by ASTM D4373.

2.9 CRUSHED STONE

A.

Crushed Stone to be placed around the secondary and primary leachate
collection pipes shall meet the requirements of #57 aggregate as specified in
Section 703 of the NHDOT Specifications.

Crushed Stone to be placed under buildings, manholes, and other similar
structures shall meet the requirements of #67 aggregate as specified in Section
703 of the NHDOT Specifications.

2.6 RIPRAP

A.

Stone used for Riprap shall be hard, durable, angular in shape; resistant to
weathering and to water action; free from overburden, spoil, and organic
materials; and shall meet the gradation requirements specified.

Neither breadth nor thickness of a single stone should be less than one-third
(4) its length. Rounded stone or boulders will not be accepted unless
authorized by ENGINEER and OWNER.

The sources from which Riprap will be obtained shall be selected well in
advance of the time when the material will be required in the Work. The
acceptability of the material will be determined by service records for similar
stone and/or by suitable tests. If testing is required, suitable samples of stone
shall be taken in the presence of the CQA Consultant at least fourteen (14) days
in advance of the time when the placing of Riprap is expected to begin. The
approval of some rock fragments from a particular quarry shall not be
construed as constituting the approval of all rock fragments taken from the

quarry.

File No. 3066.09 Earthwork 02200 - 4 of 14 December 2017

D. In the absence of service records, resistance to disintegration from the type of
exposure to which the stone will be subjected will be determined by the
following tests:

1. The results of the abrasion test (ASTM C535) shall indicate a percentage
loss of not more than forty (40) after five hundred (500) revolutions.

2. The results of the sulfate soundness test (ASTM C88) shall indicate a loss
not exceeding ten percent (10%) after five (5) cycles.

E. _Riprap shall generally meet the following gradation requirements:

Riprap
Sieve Size Percent Finer
by Weight

12-inch 100

8-inch 40-70
6-inch 20 - 40
3-inch 0-20
2-inch 0-10

F. Control of gradation will be by visual inspection.

G. Any difference of opinion between the CQA Consultant and CONTRACTOR shall
be resolved by dumping and checking the gradation of two (2) random
truckloads of stone. Mechanical equipment, a sorting site, and labor needed to
assist in checking gradation shall be provided by CONTRACTOR at no
additional cost to OWNER.

2.7. TOPSOIL

A. Topsoil shall be used for areas beyond the cell limits disturbed during
construction. Topsoil shall be free of trash, ice, snow, tree stumps, roots, sticks,
clay, peat, weeds, sod, and other non-soil based organic materials.

B. Topsoil shall be friable soil containing no stone greater than 2 inches in
diameter and contain no more than 70 percent of the material passing the No.
200 sieve.

C. Topsoil shall be obtained from naturally well-drained areas.

D. Topsoil shall not be excessively acid or alkaline nor contain material harmful

to plants.

PART 3 - EXECUTION

3.1 EQUIPMENT

File No. 3066.09 Earthwork 02200 - 5 of 14 December 2017

3.2

CONTRACTOR shall only use equipment that has been approved by ENGINEER
for this Work.

CONTRACTOR shall furnish, operate, and maintain grading equipment as is
necessary to produce uniform layers, sections, and smoothness of grade for
compaction and drainage.

CONTRACTOR shall furnish, operate and maintain compaction equipment as is
necessary to produce the required in-place density and moisture content.

CONTRACTOR shall furnish, operate, and maintain tank trucks, pressure
distributors, or other equipment designed to apply water uniformly and in
controlled quantities to variable surface widths, if moisture conditioning is
required to achieve the specified in-place density and moisture content.

CONTRACTOR shall furnish, operate, and maintain soil spreading equipment
that travels on the material being spread without traveling directly on the
surface of the underlying compacted soil surface layer.

CONTRACTOR shall furnish, operate, and maintain miscellaneous equipment
such as scarifiers, disks, spring tooth or spike tooth harrows, earth hauling
equipment, and other equipment necessary for earthwork construction.

GENERAL

A.

CONTRACTOR shall plan and perform his operations so as to prevent damage
to existing structures, safeguard people and property, limit disruptions to site
traffic, protect the structures to be installed, and provide safe working
conditions in compliance with local safety regulations and provisions of the
Occupational Safety and Health Administration (OSHA).

Prior to excavating or placing and compacting soil, CONTRACTOR shall
carefully inspect the installed Work of all other sections and verify that all
Work is complete to the point where Work of this Section may properly
commence without adverse impact. If CONTRACTOR has any concerns
regarding the installed work of other sections, then CONTRACTOR shall
immediately notify ENGINEER prior to the initiation of soil placement. Failure
to notify ENGINEER in writing shall be construed as CONTRACTOR’s
acceptance of the relative Work of all other Sections.

Soil and aggregate shall not be stockpiled or stored within the limits of the area
to be lined.

Soil shall be placed and compacted to the lines and grades shown on the
Drawings.

Soil shall be placed only on dry, unfrozen subgrade surfaces.

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3.3

Soil shall be placed in loose lifts that result in a compacted lift thickness no
greater than 8 inches. Compaction shall be performed using a static smooth-
drum roller or padded-foot compactors as specified elsewhere in this Section.
Hand compaction of material shall be used in locations where larger
compaction is inappropriate due to limited area.

CONTRACTOR shall finish each day’s work with a smooth-drum roller to create
a smooth surface, free from ruts or indentations, that will limit moisture
penetration. The area shall be left in a manner to promote runoff at the end of
each day.

Prior to continuing construction from the previous day’s work, CONTRACTOR
shall scarify the surface to provide a bond between the layers.

EXCAVATION BELOW GRADE

A.

Excavations shall be made to the elevations and dimensions shown on the
Drawings. Excavate sufficient material to provide suitable room for
construction providing bracing and support as required. The bottom of the
excavations shall be rendered firm and dry and in all respects acceptable to the
CQA Consultant.

Remove water accumulated in excavations by pumping or other means to
maintain a dry and stable subgrade until earthwork operations are complete.
All dewatering shall be performed at CONTRACTOR’s cost. Pumped water shall
be treated using a sediment control system such as DIRTBAG® by ACF
Environmental or other system approved by the ENGINEER. Treated water
shall be directed to the stormwater basins.

Where the soil subgrade has been softened, eroded, or otherwise disturbed by
flooding, exposure during unfavorable weather, or other causes, it shall be
over-excavated and replaced with suitable material at no cost to OWNER.

When the excavation has reached required depths, ENGINEER shall be notified
and will observe conditions. If, in the opinion of the CQA Consultant, the
material in its undisturbed natural condition, at or below the normal grade of
the excavation as indicated on the Drawings is unsuitable, it shall be removed
and be replaced with suitable material as directed by ENGINEER.
CONTRACTOR shall be responsible for the removal, relocation, and stockpiling
of unsuitable material. Unsuitable material is classified here as stumps,
excessively wet soil, ledge rock, ice, topsoil, subsoil, organics, existing fill, or
other deleterious material.

CONTRACTOR shall exercise care to preserve the material below and beyond
the lines of excavation. If the bottom of an excavation is extended below the
limits shown on the Drawings or specified or directed by ENGINEER, then it

File No. 3066.09 Earthwork 02200 - 7 of 14 December 2017

Board of Aldermen Page 9
August 9, 2016

CONFIRMATION OF MAYOR'S APPOINTMENTS — None
UNFINISHED BUSINESS - RESOLUTIONS

R-16-044
Endorsers: Mayor Jim Donchess
Alderman Richard A. Dowd
Alderman Ken Siegel
Alderwoman Mary Ann Melizzi-Golja
Alderman Sean M. McGuinness
Alderman Don LeBrun
Alderman-at-Large Michael B. O’Brien, Sr.
Alderman Tom Lopez
Alderman-at-Large Brian S. McCarthy
AMENDING R-15-188 TO ALLOW THE CLOSING FOR PURCHASE OF THE HYDROELECTRIC
FACILITY IN MINE FALLS PARK TO OCCUR ANYTIME BETWEEN DECEMBER 15, 2016, AND
DECEMBER 15, 2017
Given its second reading;

MOTION BY ALDERMAN DOWD FOR FINAL PASSAGE OF R-16-044
MOTION CARRIED

Resolution R-16-044 declared duly adopted.

R-16-045
Endorsers: Mayor Jim Donchess
Alderman Ken Siegel
Alderman-at-Large Lori Wilshire
Alderman-at-Large Michael B. O’Brien, Sr.
Alderwoman Mary Ann Melizzi-Golja
Alderman Tom Lopez
Alderman June M. Caron
Alderman-at-Large Brian S. McCarthy
ESTABLISHING AN EXPENDABLE TRUST FUND FOR STATE EMPLOYER PENSION COSTS
Given its second reading;

MOTION BY ALDERMAN SIEGEL FOR FINAL PASSAGE OF R-16-045

ON THE QUESTION

Alderman Siegel

This legislation establishes a bucket. It does not establish an expenditure it is a container to hold funds.
| want to make that clear. Whether we put funds in it or not is up to the Board of Aldermen and is a
separate decision and that is why it is different than previous legislation that has appeared before this
Board. | would recommend passage. Thank you.

Alderman Moriarty

| am going to vote against this because if you can spend the money without having to override the
spending cap then | believe you should just spend the money directly. In the past we had a similar trust
fund created and you could fill it with revenues that would normally be used instead of tax money to pay
the general fund and then in the end you end up effectively implementing a spending cap by-pass
without ever having to override the spending cap with ten votes. You create a fund with eight votes and

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 NASHI'A 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

3.4

3.5

3.6

shall be refilled and compacted in accordance with these specifications at
CONTRACTOR’s expense with fill approved by ENGINEER.

EXCAVATION FOR UTILITY TRENCHES

A.

Excavate as necessary for installation of utilities including, culverts, leachate
collection and transmission system pipe, and for related structures and
appurtenances.

Excavations for utilities shall be carried out in a manner that will preserve the
undisturbed state of the subgrade soils. Dewatering shall be performed as
needed to provide a dry excavation.

Excavation of trenches required for the installation of subsurface utilities shall
be made to the depths indicated on the Drawings and in such a manner and to
such widths as will give suitable room for laying the pipe within the trenches,
for bracing and supporting, and for drainage facilities. CONTRACTOR shall
render the bottom of the excavations firm and dry, and acceptable to the CQA
Consultant.

MISCELLANEOUS EARTHWORK

A.

CONTRACTOR shall perform earthwork as necessary to permit the placement
of topsoil, for constructing access roads, and any other miscellaneous earth
excavation required.

SUBGRADE PREPARATION

A.

Prior to placing earth materials, the subgrade should be compact, dry, and free
from debris, ice, and snow. Earth materials shall not be placed over frozen soil
unless otherwise approved by ENGINEER.

CONTRACTOR shall excavate in such a manner as to limit disturbance of the
underlying natural ground. Deterioration of the subgrade between the time of
excavation and initial fill placement shall be the responsibility of
CONTRACTOR and shall be repaired at CONTRACTOR’s expense.

All subgrade surfaces shall be observed by the CQA Consultant prior to earth
placement. Sufficient time must be given to the CQA Consultant to observe and
perform tests on the subgrade.

Subgrade for pavement or geosynthetic placement shall be proof-rolled by at
least four (4) passes of a 10,000-pound vibratory, smooth-drum roller to
demonstrate strength. The subgrade shall be smooth and uniformly graded
and shall be prepared to the grades indicated on the Drawings. All objects
capable of penetrating the overlying geosynthetics, including, but not limited

File No. 3066.09 Earthwork 02200 - 8 of 14 December 2017

3.7

to, stones, sticks, and debris shall be removed by hand and replaced with
compacted earth material as indicated on the Drawings.

Deterioration of the subgrade surface between acceptance of the CQA
Consultant and deployment of the geosynthetic materials is the responsibility
of CONTRACTOR and shall be repaired at no cost to OWNER.

Areas to receive Topsoil shall be inspected and approved by the CQA
Consultant before Topsoil is placed. After Topsoil has been spread and fine-
graded, CONTRACTOR shall remove and dispose of all rubbish, sticks, large
stiff clods, lumps, brush, roots, stumps, litter, stones larger than 3 inches, and
other foreign material from the area to be covered with topsoil.

The Topsoil surface shall be tracked immediately after fine grading and other
preparation has been completed. Tracking is to be performed with bulldozers
operating in the direction of water flow. The tracks of the bulldozers are to
have grousers of sufficient height to leave visible depressions in the subgrade.
The depressions are to be perpendicular to the direction of water flow to
reduce erosion potential until topsoil is placed. During the tracking, all
depressions caused by settlement or tacking shall be filled with additional
topsoil and the surface shall be regraded and tracked until an even finished
grade is created.

SOIL PLACEMENT AND COMPACTION

A.

Unless otherwise shown on the Drawings, Topsoil shall be placed to a
minimum thickness of 4 inches. CONTRACTOR shall exercise care to ensure
that the underlying soil remains intact and does not become mixed with the
Topsoil during placement.

Topsoil shall not be compacted.

Soil shall be placed in loose continuous layers and compacted to the specified
compaction criteria. The loose lift fill thickness shall not exceed 12 inches.
Smaller lift heights may be required to achieve the specified compaction.

Compaction shall be by mechanical means designed specifically for soil
compaction. The CQA Consultant, ENGINEER, or OWNER reserves the right to
disapprove any device of inadequate capacity or, in their opinion of a type
unsuited to the character of material being compacted.

Placed and compacted soil shall be graded to drain and provide a smooth
surface that will readily shed water.

Earth materials containing ice, snow, frozen soil, large rocks, roots, sod,
rubbish and other deleterious or organic material shall not be placed. Frozen
soil shall not be placed as fill, nor shall fill or utilities be placed on frozen soil.

File No. 3066.09 Earthwork 02200 - 9 of 14 December 2017