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Public Works Association (APWA):

Electric Red
Gas & Oil Yellow
Communications Orange
Water Blue
Sewer & Drain Green

PART 3 - EXECUTION

3.01 INSTALLATION:

A. — Tracer tape shall be installed directly above the pipe or conduit it is to identify,
approximately 12 inches below the proposed ground surface.

B. — The Contractor shall follow the manufacturer's recommendations for installation of
the tape, as approved by the Engineer.

END OF SECTION

2022 Sewer Replacement Project Tracer Tape
Nashua, NH 02518-2

SECTION 02530

BUILDING CONNECTIONS AND DROP CONNECTIONS

PART 1 - GENERAL

1.01 WORK INCLUDED:

A. This Section covers furnishing of all materials and labor to construct building sewer
connections and drop connections as indicated on the Drawings, and as herein
specified.

B. Final location of building connections shall be determined in the field by the Engineer.

1.02 RELATED WORK:

A. Section 02300, EARTHWORK

B. Section 02631, PRECAST MANHOLES AND CATCH BASINS

C. Section 02085, POLY VINYL CHLORIDE GRAVITY PIPE AND FITTINGS

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

A. Electronic file consisting of shop drawings and manufacturers literature of the
materials of this section shall be submitted to the Engineer for review.

B. Shop drawings of any special connections, including the proposed adapters for service
connections, shall be submitted to the Engineer.

PART 2 — PRODUCTS

2.01 MATERIALS:

A. Pipe and fittings for drop connections and for gravity building connections shall be as
specified under Section 02085 POLYVINYL CHLORIDE GRAVITY PIPE AND
FITTINGS. Adaptors shall be as recommended by the pipe manufacturer.

B. — Concrete for encasement shall be as specified in Section 03302 FIELD

CONCRETE.

2022 Sewer Replacement Project Building Connections and Drop Connections
Nashua, NH 02530-1

PART 3 - EXECUTION

3.01 INSTALLATION:

A. BUILDING CONNECTIONS:

1.

Building connections shall be installed using the same construction and pipe
joining techniques as specified in Section 02085 POLYVINYL CHLORIDE
GRAVITY PIPE AND FITTINGS.

In general, connections shall be carried only to the property line. The end of the
pipes shall be closed with PVC stoppers jointed in place to ensure against
infiltration into the sewer line.

In general, the mainline sewer has been designed at depths to accommodate full
basement service for each building to be connected. Building connections must
be installed at the proper depth in every case that full basement service is
possible for the building. The CONTRACTOR will be required to excavate,
remove, reinstall and backfill any building connection improperly installed at his
own expense. The CONTRACTOR will demonstrate to the Inspector that all
connections are properly made.

In streets where building sewers must cross water mains, the CONTRACTOR
will install the building sewers at proper depths to maintain the vertical
clearance between the two pipes, as shown in the construction details. Building
services shall be installed beneath water mains.

B. DROP CONNECTIONS:

1. When the invert of a pipe entering a manhole is 24 inches or more above the
invert of the lowest pipe leaving the manhole, it shall be connected to the
manhole with an inside drop section.

2. The drop pipe shall be the same diameter, material, and class as the sewer pipe
entering the manhole, unless otherwise noted in the drawings. The drop
connection shall be constructed as shown on the City of Nashua Standard
details.

3. All connecting hardware shall be stainless steel.

END OF SECTION
2022 Sewer Replacement Project Building Connections and Drop Connections

Nashua, NH

02530-2

SECTION 02533

CONNECTIONS TO EXISTING STRUCTURES OR SEWER MAINS

PART 1 - GENERAL

1.01

1.02

1.03

WORK INCLUDED:

The Contractor shall furnish materials, tools, labor and equipment to cut suitable
openings into the existing sewer manholes, make connections to existing sewers and
all other work necessary to direct the existing sewage flow as indicated on the
drawings and as herein specified.

RELATED WORK:

Section 02631, PRECAST MANHOLES AND CATCH BASINS

Section 02085, POLYVINYL CHLORIDE GRAVITY PIPE AND FITTINGS
Section 01735, CUTTING, CORING and PATCHING

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

Prior to start of work, submit details of the methods proposed for doing the work and
for maintaining the sewage flow as herein specified.

PART 2 - PRODUCTS

A. Products for attaching to existing sewer manholes are described in Sections
02631, Precast Manholes and Catch Basins; and Section 01735, Cutting, Coring
and Patching.

B. Products for attaching sewer service lines or drain lines to existing sewer mains:

1. Connection of new sewer service or drain pipe to existing sewer mains shall
be by mechanical saddles (as described in items 2 and 3 below). The
connection device shall provide a firm base that will hold and attach the
service main to the existing pipe without the possibility of the pipe becoming
loose or detaching from the main. Putting the pipe in the main and grouting
around it will not be allowed.

2. Where feasible and sizing allows this type of connection, the preferred
method of attachment of PVC service or drain pipe to the existing main is by

2022 Sewer Replacement Project Connections to Existing Structures or Sewer Mains
Nashua, NH 02533-1

a ROMAC “CB” Sewer Saddles or equal.

3. Should the ROMAC type service connection not be feasible due to pipe size
or other constraints, the connection may be made using a Kor-N-Tee, Inserta
Tee or equal. These types of fittings rely on having enough of the pipe wall
thickness present to create tension between the fittings the pipe wall such that
fitting will be held securely in place. Should the Contractor elect to use this
type of fitting the submittal must include an evaluation of the existing pipe
wall thickness and provide cut sheets from the manufacturer showing this
type of fitting will achieve the desired results.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. The Contractor shall provide temporary plugs or provide other suitable means for
maintaining the new sewer free of sewage flow until such time as it can be inspected
and tested for leakage.

B. Connections to the new sewer shall be made when directed by the Engineer and only
after the new pipeline has been inspected and has successfully passed the leakage
test.

C. The Contractor shall modify each existing structure for installation of the necessary
piping, but in so doing shall confine the cutting to the smallest amount possible
consistent with the work to be done.

D. All new piping connected to existing structures shall be encased in concrete in a
manner satisfactory to the Engineer.

E. All work shall be done with the proper tools and by careful workmen competent to
do work.
F. The Contractor shall cut, reshape and fill the existing manhole tables and plug

existing outlets as indicated on the drawings and as directed by the Engineer, to
accommodate the new connections. Reshaped manhole invert channels shall be
smoothly shaped to permit the flow of sewage. Manhole invert channels shall be
reconstructed as specified under Section 02631, PRECAST MANHOLES AND
CATCH BASINS and shall comply with the City of Nashua Standard Specifications
for Sewers and Drains.

END OF SECTION

2022 Sewer Replacement Project Connections to Existing Structures or Sewer Mains
Nashua, NH 02533-2

2022 Sewer Replacement Project Connections to Existing Structures or Sewer Mains
Nashua, NH 02533-3

SECTION 02534

FILL SEWER PIPE TO BE ABANDONED

PART 1 - GENERAL

1.01

1.02

1.03

WORK INCLUDED:

The existing sewer pipe to be abandoned in place shall be completely filled with
"Flowable Fill" after the sewerage has been re-routed through the new sewer main.
The work shall include all materials, labor, pumping, shoring, and cleanup required
to complete this item.

RELATED WORK:
Section 02631, PRECAST MANHOLES AND CATCH BASINS

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

The contractor shall submit his proposed method for filling the pipe to be abandoned
to the Engineer for approval two (2) weeks prior to scheduling the work. The
"Flowable Fill" mix shall be comprised of Portland cement, water, sand and other
additives to insure that the material shall flow the entire length of the pipe and
completely fill the void. The mix design for the "Flowable Fill" shall be submitted to
the Engineer for approval.

PART 2 - PRODUCTS - NOT APPLICABLE

PART 3 - EXECUTION

3.01 INSTALLATION:

A No work shall be done without approval from the Engineer. The contractor shall
demonstrate to the Engineer by visual inspection or other means that the existing
pipe has been completely filled.

B. All work shall be done with the proper tools and by careful workmen competent to
do work.

END OF SECTION
2022 Sewer Replacement Project Fill Sewer Pipe To Be Abandoned

Nashua, NH 02534-1

SECTION 02631
PRECAST MANHOLES AND CATCH BASINS PART 1 -
GENERAL
1.01 WORK INCLUDED:

A. This Section covers all precast manholes and catch basins complete, including, but not limited
to, bases, walls, cones, mortar, inverts, frames and covers.

B. Work shall comply with City of Nashua Standard Specifications for Sewers and Drains
(Appendix A).

102 RELATED WORK:
A. Section 01330, SUBMITTALS
B. Section 02085, POLY VINYL CHLORIDE GRAVITY PIPE AND FITTINGS
C. — Section 02300, EARTHWORK
D. Section 02745, ROAD RESTORATION
1.03 = SYSTEMDESCRIPTION:

A. Precast sections shall conform in shape, size, dimensions, materials, and other respects to the details
indicated on the drawings or as ordered by the Engineer.

B. — All manholes and catch basins shall have precast concrete bases, risers and cone sections. Invert
channels shall be formed of brick and mortar upon the base.

C. Catch basins shall have a 4-foot deep sump unless otherwise specified.

1.04 REFERENCES:

A. The following standards form a part of this specification as referenced:

American Society for Testing and Materials (ASTM)

ASTM A48 Gray Iron Castings

ASTM C32 Sewer and Manhole Brick

ASTM C144 _— Aggregate for Masonry Mortar

ASTM C207 Hydrated Lime for Masonry Purposes

ASTM C478 _ Precast Reinforced Concrete Manhole Sections

ASTM C923 Specification for Resilient Connectors Between Reinforced Concrete

2022 Sewer Replacement Project Precast Manholes and Catch Basins
Nashua, NH 02631-1

Manhole Structures and Pipes

ASTM C1244 Standard Test Method for Concrete Sewer Manholes by the
Negative Air Pressure (Vacuum) Test.

American Association of State Highway and Transportation Officials (AASHTO)

AASHTO M198Joints for Circular Concrete Sewer and Culvert Pipe Using
Flexible Watertight Gaskets

Occupational Safety and Health Administration OSHA 29 CFR 1910.27

Fall Prevention Protection

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

A. — Six sets of manufacturer literature of the materials of this section shall be submitted to the Engineer
for review.

B. _ Tests reports as required shall be submitted to the Engineer.

PART 2 - PRODUCTS

2.01 | PRECAST CONCRETE SECTIONS:

A. All precast concrete sections shall conform to ASTM C478 with the following exceptions and
additional requirements:

1. The wall thickness of precast sections shall be as designated on the drawings, meeting
the following minimum requirements:

Section Diameter (Inches) Minimum Wall Thickness (Inches)
48 5
60 6
2 7
84 8

2. Type II cement shall be used except as otherwise approved.

3. Sections shall be steam cured and shall not be shipped until at least five days after having
been cast.

4. Minimum compressive strength of concrete shall be 4000 psi at 28 days.

5. No more than two lift holes may be cast or drilled in each section.

2022 Sewer Replacement Project Precast Manholes and Catch Basins
Nashua, NH 02631-2

City of Nashua

Purchasing Department
Administrative Services Division (603) 589-3330
229 Main Street - Nashua, NH 03060 Fax (603) 594-3233

April 28, 2022
Memo #22-264

TO: Mayor Donchess
Finance Committee

SUBJECT: Asphalt Testing Change Order #4 in the amount of $63,795 funded from 81704 Paving
Bond/ Bond

Please see attached communications from Daniel Hudson, City Engineer, dated April 28, 2022 for project
specific details related to this purchase. Below please find a summary of the purchase approval request:

Item: Change Order #4 for Asphalt Testing as part of the Paving Program
Value: Requested Amount: $63,795
Original contract approved amount: $48,600 approved 3/14/19 under Finance
Memo 19-132
Change Date | Change Value | New Total
Original Contract 3/14/19 n/a $48,600
Change Order #1 $22,800 $71,400
Change Order #2 3/25/20 $94,400 $165,800
Change Order #3 3/31/21 $100,500 $266,300
Change Order #4 5/4/22 $63,795 $330,095
Vendor: S.W. Cole Engineering

Department: 160 Engineering
Source Fund: 81704 Paving Bond/ Bond

The Board of Public Works (4/28/22 BPW meeting), Division of Public Works: Engineering, and the
Purchasing Department respectfully request your approval of this contract.

Regards,
Kelly Parkinson

Purchasing Manager

Ce: D Hudson
C O'Connor