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2. The manhole shall be filled with water to the top of the cone section. If the excavation
has not been backfilled and observation indicates no visible leakage, that is, no water visibly
moving down the surface of the manhole, the manhole may be considered to be
satisfactorily water-tight. If the test, as described above, 1s unsatisfactory as determined
by the Engineer or 1f the manhole excavation has been backfilled, the test shall be
continued. A period of time may be permitted if the Contractor so wishes, to allow for
absorption by the manhole. At the end of this period, the manhole shall be refilled to
the top of the cone, if necessary, and a measuring time of at least 8 hours begun. At the
end of the test period, the manhole shall be refilled to the top of the cone, measuring the
volume of water added. This amount shall be extrapolated to a 24-hour loss rate and the
leakage determined on the basis of depth. The leakage for each manhole shall not
exceed one gallon per vertical foot for a 24-hour period. If the manhole fails this
requirement, but the leakage does not exceed 3 gallons per vertical foot per day, repairs
by approved methods may be made as directed by the Engineer to bring the leakage
within the allowable rate of one gallon per foot per day. Leakage due to a defective section
or joint or exceeding the 3 gallon per vertical foot per day, shall be cause for rejection of the
manhole. It shall be the Contractor's responsibility to uncover the reyected manhole as
necessary and to disassemble, reconstruct or replace it as directed by the Engineer. The
manhole shall then be retested and, if satisfactory, interior joints shall be filled and pointed.

3. | No adjustment in the leakage allowance will be made for unknown causes such as leaking
plugs, absorption, etc. It shall be assumed that all loss of water during the test is a result
of leaks through joints or through the concrete. Furthermore, the Contractor shall take
any steps necessary to assure the Engineer that the water table 1s below the bottom of the
manhole throughout the test.

4. If the groundwater table is above the highest joint in the manhole, and there is no leakage
into the manhole, as determined by the Engineer, such a test can serve to evaluate water-
tightness of the manhole. However, if the Engineer is not satisfied with the results, the
Contractor shall lower the water table and carry out the test as described hereinbefore.

3.03 CLEANING:

All new manholes shall be thoroughly cleaned of all silt, debris and foreign matter of any kind,
prior to final inspection.

END OF SECTION

2019 Sewer Replacement Project Precast Manholes and Catch Basins
Nashua, NH 02631-8

SECTION 02745

ROAD RESTORATION

PART 1 - GENERAL

1.01

1.02

1.03

1.04

WORK INCLUDED:

Furnish all labor, equipment and materials required to install crushed gravel base
course, bituminous concrete pavement courses including temporary and permanent
trench paving curbing, sidewalks, disposal of excess material at the City landfill and
restoration of pavement markings in roadway areas where sewer and drainage
repairs are required, manholes are to be installed, manhole frames and covers are
replaced, or as ordered by the Engineer and as specified herein.

RELATED WORK:

Section 02300, EARTHWORK

Section 02085, POLY VINYL CHLORIDE GRAVITY PIPE AND FITTINGS
Section 02631, PRECAST MANHOLES

PAVEMENT DESCRIPTION:

GENERAL

In roadway areas where sewer and drainage repairs are required or ordered by the
Engineer, all trenched areas shall be paved with temporary bituminous pavement as
detailed on the plans as soon as practicable after installation of individual pipeline
segments, but no trench shall be without temporary pavement during the weekend
(Saturday & Sunday). After a minimum period of 45 days, the trench patch
pavement area shall be saw cut and removed beyond the limits of the trench, and
crushed gravel and binder and finish courses of pavement shall be installed as
detailed on the Contract Drawings, or as ordered by the Engineer. Miscellaneous
curbing and sidewalk disturbed by sewer and drainage installation shall be repaired
as detailed on the Contract Drawings, or as ordered by the Engineer.

REFERENCES

The following standards form a part of these specifications and indicate the
minimum standards required:

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-1

American Society for Testing and Materials (ASTM):

ASTM D1557 Test for Moisture-Density Relations of Soils and Soil-
Aggregate Mixtures Using 10 Pound Rammer and 18-Inch
Drop

State of New Hampshire Department of Transportation (NHDOT) Standard
Specifications for Road and Bridge Construction, latest edition:

Section 304 Base Courses
Section 401 Plant Mix Pavements - Table 401-1, 401-2
Section 632 Retroreflective Pavement Markings

Prime and Tack Coats - shall conform to the NHDOT Standards

Federal Specifications:

SS-S-164 Sealing Compound, Hot Poured Type, for Joints in Concrete
SS-S-1401C Sealants, Joint, Non-Jet-Fuel-Resistant, Hot Applied, for
Portland

Cement and Asphalt Concrete Pavement

1.05 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:

A. Electronic files of complete job mix formula shall be submitted to the Engineer
at least two weeks before any of the work of this section 1s to begin.

B. Delivery slips shall be furnished with each load of mix delivered to the project.
Information shall include:

Vehicle identification.

Date.

Project.

Identification of material.

Gross, tare and net weights.

Signed by the bituminous concrete producer.
Stamped by a licensed public weighmaster.

MAME WNS

C. Material test results performed by a certified laboratory shall be submitted to the
Engineer for crushed gravel subbase proposed for the project. If required by the
Engineer, samples shall be submitted to the Engineer.

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-2

PART 2 - PRODUCTS

2.01 CRUSHED GRAVEL SUBBASE:

A. Crushed gravel subbase shall conform to NHDOT Item 304.3 Crushed Gravel, or
Item 304.4 Crushed Stone (Fine Gradation).

2.02 BITUMINOUS CONCRETE PAVEMENT:

A. The type of bituminous pavement courses to be utilized on this project shall be:

Roadway Pavement Section

Layer Description Thickness (inches)

Temporary Pavement (Single Course)
NHDOT 12.5mm Superpave 3” Arterial Streets
(50 Gyration Design)
2” Residential Streets

Permanent Wearing Course

NHDOT 9.5 mm Superpave 1-1/2” Arterial &
(75 Gyration Design) Residential Streets
Permanent Binder Courses

NHDOT 19 mm Superpave 5-1/2” Arterial Streets

(50 Gyration Design)
3-1/2” Residential

Streets

B. The joint sealant shall be a hot poured rubberized emulsified asphalt sealant meeting
the requirements of Federal Specifications SS-S-1401 or SS-S-164.

C. TACK COAT:
A. The tack coat shall be an asphalt emulsion, RS-1.

B. The Tack Coat shall be applied to all vertical seams and joints, and between
the bituminous binder and wearing course layers.

C. The surface to which the Tack Coat will be applied shall be prepared as
detailed in the NHDOT, Standard Specifications 410.3.3.1.

D. The Tack Coat shall be applied as detailed in the NHDOT Standard
Specifications 410.3.4.1

E. The Tack Coat shall be applied at a rate as detailed in the NHDOT Standard
Specifications 410.3.4.1.1, and as approved by the Engineer.

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-3

F. The Tack Coat shall be considered subsidiary to the pavement items of work.

2.03 CURBING:

A. Curbing shall conform to the requirements of NHDOT Standard Specifications 609,
Items 609.01 or Item 609.02 as detailed on the plans.

2.04 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.

2.05 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.

PART 3 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
%” (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

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-4

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.

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,
curbing, 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.

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-5

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.

E. 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.

3.06 RAISING AND ADJUSTING CASTINGS:

A. 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.

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

C. 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.

D. 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.

E. 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.

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

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-6

3.07 CURBING:

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

3.08 SIDEWALKS:

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

3.09 PAVEMENT MARKINGS:

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. Pavement markings are considered subsidiary to the
pavement items of work.

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

2022 Sewer Replacement Project Road Restoration
Nashua, NH 02745-7

SECTION 02920
LOAMING AND SEEDING
PART 1 —- GENERAL
1.01 DESCRIPTION OF WORK:

A. This section covers all labor, materials, and equipment necessary to do all loaming,
seeding and related work for miscellaneous areas disturbed by roadway and sidewalk

construction and as herein specified.

Note: Loaming and seeding for miscellaneous areas disturbed by roadway and

sidewalk construction is subsidiary to the sidewalk items of work.
1.02 RELATED WORK:
A. Section 02300 - EARTHWORK
B. Section 02370 — EROSION CONTROL

PART 2-— PRODUCTS
2.01 MATERIALS:

A. Loam for disturbed areas shall comply with the following
requirements.

.Topsoil for use in general lawn areas and planting beds shall
conform to the following grain size distribution for material
passing the #10 sieve:

U.S. Sieve No. % Passing by Weight
Minimum
10 100 ---
20 78 100
40 60 85
100 38 60
270 22 35
0.002 mm 2 5

Maximum

Natural loam not conforming to above shall be treated by the Contractor to
meet this specification. Cost of amendment to the loam shall be the

Contractor's responsibility.

B. Fertilizer:

1. Fertilizer shall be commercial fertilizer, 10-10-10 fertilizer mixture containing

at least 40 percent of organic nitrogen.
C. Mulch:

1. Materials to be used in mulching shall be hay, straw or wood fiber mulch.

2022 Sewer Replacement Project
Nashua, NH

Loam and Seed
02920-1

D. Lawn Seed:

1. Grass Seed: Provide fresh, clean, new-crop seed complying with tolerance for
purity and germination established by Official Seed Analysis of North America.
Provide seed mixture composed of grass species, proportions with maximum
percentages of purity and germination, and a minimum percentage of weed
seed, as specified.

¢ 45% Turf Type Tall Fescue

¢ 20% Kentucky Bluegrass

* 20% Creeping Red Fescue

¢ 15% Perennial Ryegrass

Sow at rate of 6-7 Ibs. per 1000 square feet.

Recommended planting dates: 4/1 - 5/31 or 8/15 - 10/15
PART 3 —- EXECUTION
3.01 SURFACE PREPARATION:

A. After approval of rough grading, loam shall be placed on areas affected by the
Contractor's operations. Loam shall be at least 6 inches compacted thickness.

B. Fertilizer shall be applied at the rate of 1000 pounds per acre.

C. Loam shall be worked a minimum of 3 inches deep, thoroughly incorporating the lime
and fertilizer into the soil. The loam shall then be raked until the surface is finely
pulverized and smooth and lightly compacted with rollers. Minimum depth shall be 4-
inches after completion.

3.02 PLACING LOAM

A. Site:
1. All subgrade elevations should be uniformly graded to receive loam and shall
be inspected and approved by the Engineer prior to placement of loam.
2. Place loam to form a total depth of 6", unless noted otherwise, when rolled.
3. All depressions exposed during the rolling shall be filled with additional loam.

3.03 SEEDING AND MULCHING:

A. Seeding shall be done when weather conditions are approved as suitable, in the periods
between April 1 and May 30 or August 15 to October 1, unless otherwise approved.

B. The Contractor shall maintain all seeded areas until final acceptance of the contract.

END OF SECTION

2022 Sewer Replacement Project Loam and Seed
Nashua, NH 02920-2