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SCOPE AND APPROACH

Note: The scope of work does not include production of as-built construction documents in CAD or other electronic
format.

Phase 005 Total: 12 hours

SCOPE EXCLUSIONS AS STATED BY CITY

The following items in the original scope of work issued by the City of Nashua were removed from consideration
pursuant to the updated scope email received October 26, 2017 from the City of Nashua:

Coordinate remote access, reports, and alarms
Coordinate control narrative
Load software on to SCADA PCS (i.e. iFix SCADA Nodes, etc.) and testing
Setup redundant servers
Setup “dummy” communications network
Develop HM! screens (develop and modify with input from client)
Develop all PLC programming
Develop all OIT programming
9. Test all programs
10. Deploy and test all SCADA PCs
11. Testing of all remote site PLC panels
12, Test all plant PLC panels -|/O checkout and startup
13. Test panel integration
14, Onsite HMI modifications
15. Testing of auxiliary panels (i.e., chem fill panels)
16. Setup network bridge

OANOarwWN >

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P Weston(&)Sampecn

| For more information, contact:
Robert A. Goober, PE,

SCADA
uF Ee FE { Director of Marketing, Weston & Sampson

instrumentation and controls provider | (800) SAMPSON | gooberr@wseinc.com

w Planning

= Design
Construction/instaliation
w Integration

m PLC and SCADA programming
ws Start-up and training

a Implementation

a Maintenance

a Optimization

a Phased appreaches

a Design/build services
# Energy conservation

Data management

Pa

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ma

Weston & Sampson’s engineers, integrators, instrumentation specialists, and field
technicians provide collaborative expertise to meet all aspects of your monitoring
and control needs. Key personnel from our engineering, construction, and services
groups have been organized into a new Supervisory Control and Data Acquisition
(SCADA) and Instrumentation and Controls (1&C) team to ensure continuity over the
life of each project.

Whether you have no control system, an aging system, or a system that needs
to be maintained or upgraded, our SCADA and !&C team can help. Our areas of
expertise include:

Secure VPN connections with gateways and firewalls

Remote access to SCADA displays via phone or internet

w Fix, RSView, Wonderware, Citect, and VTScada

m Radio, telephone, cellular, cable, and fiber-optic based telemetry systems

a #

Weston & Sampson understands the different modes of communicating with and
controlling remote water and wastewater facilities—from proprietary and open
architecture remote telemetry units (RTU), to telemetry, to other RTU options.
Backed by our long history in the water and wastewater industry, our engineers
provide valuable input far beyond the design stage.

westonandsampson.com Weston (@)Samosor

SOUTHBRIDGE WATER TREATMENT PLANT

SCADA IMPROVEMENTS

town of southbridge, massachusetts

The Town of Southbridge, Massachusetts selected Weston & Sampson to perform
engineering evaluation, final design, and construction services for upgrades to their
Water Treatment Plant (WTP) SCADA system. The existing SCADA system at the
WTP consisted of aging redundant PLC-5 processors, aging computers, out-of-
date software, and varying levels of communication and control at remote control
panels. Since the PLC-5 was an older piece of equipment, some of the components
associated with the system were unavailable for replacement.

In addition, the older PLC-5 systems had no free memory, a condition that was
forcing the town to make process control modifications within the existing SCADA
computers. The PLC-5 processors only controlled two of the three filters at the WTP
Filter 1 had been previously updated with a new SLC 5/04 during improvement work
designed by Weston & Sampson, but due to the issues with the PLC-5 processors,
it could not be easily integrated into the overall plant operations.

The SCADA improvements for the project included:

wz Maintaining plant operations during construction

m Replacing the existing redundant PLC-5 processors with new redundant PLC
processors

= Consolidating or simplifying process contro! utilizing remote I/O

= Upgrading the existing serial and blue hose communication protocols with
Ethernet/IP

= Updating SCADA software to the latest version on several computers at the
WTP and remote locations

w= Updating the panel view or HMI at Filter 1 to duplicate the SCADA computers
for redundancy

m Reviewing internet security for communication to off-site monitoring locations

m Assessing and proposing upgrades to the alarm notification, data logging, and
remote access device software

Construction of the upgrades was completed in the summer of 2015.

westonandsampson.com

replace redundant
plc system for plant
process conirol

# increased
communication speed
between ple and
devices by converting
to ethernet

eB increased memory in
pic system

a ethernet/ip ready for
future devices (i.e.,
“plug and play”)

a upgraded plc and
scada computers and
software

client contact

Heather Blakeley, PE

Acting Director

Town of Southbridge
Department of Public Works
Southbridge, Massachusetts
508-764-2237

Weston(&)Samason

WATER AND WASTEWATER SCADA

IMPROVEMENTS
city of peabody, massachuseits

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Weston & Sampson has long history designing SCADA improvements for the City
of Peabody. As design engineer for a new Trident filtration water treatment system in
1996, we engineered a water SCADA system to monitor two treatment plants. Since
then, we have engineered improvements to the water treatment plants and water
system, including significant SCADA system upgrades.

Weston & Sampson Construction, Maintenance & Repair (CMR) has provided
emergency on-call services for the water system and wastewater systems for many
years. These on-call services include instrumentation and control and SCADA
system response. CMR performed upgrades to the city’s 41 wastewater pumps
stations from an old antiquated software to IFix. A new SCADA computer was
installed with Win911 software for dialing, remote access for operators in 2012.
Weston & Sampson Services serves as the primary operator for the wastewater
system and provides service response within 20 minutes to emergency calls.

Our SCADA highlights for both systems include:

w Engineering design and construction oversight for water system SCADA
projects (booster pump stations, storage tanks, and treatment plant upgrades)

Emergency on-call services for water and wastewater SCADA systems

PLC and SCADA programming and integration

OIT installation and programming for remote RTUs

Remote connectivity to SCADA for remote trouble-shooting and diagnostics

Chemical feed upgrades for DEP Chapter 6 compliance

SCADA screen development

400 MHz radio communication

Annual software maintenance agreements for updating SCADA GE IFix software

licenses

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client contact

Michael Sheu

Water Superintendent

City of Peabody

50 Farm Avenue

Peabody, Massachusetts 01960
978-536-7126

Weston(&) Sampsar

CONTROLS AND SCADA UPGRADE

FOR WATER SYSTEM

town of salisbury, massachusetts

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TANK RTU ALARMS

Weston & Sampson pianned and designed a complete Controls and SCADA
Upgrade for the Town of Salisbury Water System. Prior to the upgrade, operators
lost sleep during every storm worried that controls would fail or they would have
to rob one panel of components to fix a more critical one. Our design included
replacement of obsolete controllers, out-of-cornpliance radios, and aged SCADA
software and PC.

The upgrade replaced obsolete equipment and controls with reliable PLC control
panels and high speed Ethernet radio communications. All functions and components
of the system were upgraded, including SCADA software and hardware, radio
communications network, control panels, alarming and remote access. The design
carefully considered sequencing of the work and operational concerns to provide

a smooth transition from old systems to new systems.

The new system is reliable, with improved radio communication, standard
controllers and an open easily expanded Ethernet network. Each station’s panel
is similar in layout and functionality with similar graphics at local panel interfaces
and the SCADA computer screens.

Remote access to entire network via a secured virtual private network allows
operators to monitor systems during off hours through their PC or laptop,
notepad, and even their smart phone.

Key design components included:

m= Upgrade from obsolete Autocon controllers to PLC Control Panels at 10
sites including four well stations, one meter valve pit, two storage tanks, one
pressure station, a booster station, and the main office.

= Replace radios with narrow-band FCC compliant Ethernet ready radios licensed
in the more reliable municipal SCADA system bandwidth 173 frequency.

m= Keep the old system running (including radio network) until the new system was
installed and tested.

m= Replace SCADA control station PCs and SCADA software. Update to VPN
remote access via broadband cable internet with secure gateway firewall
hardware.

westonandsampson.com

client contact

Donald Levesque
DPW Director
Town of Salisbury
978-462-7611

operations coniact

Bernie Rousseau

Vice President

Pennichuck Water Service Company
603-913-2502

Weston(G)Soarnpson

WASTEWATER PLANNING, DESIGN, AND

CONSTRUCTION MANAGEMENT
department of conservation anc recreation

The Metropolitan District Commission - Division
of Watershed Management (DWM), now the
Department of Conservation and Recreation
(DCR), selected Weston & Sampson. to prepare
a comprehensive wastewater facilities plan for
the communities of West Boy!ston and Hoiden.
The overall project objective was to provide a &
framework to protect and preserve the water ®
quality in the Wachusett Reservoir watershed. i

The facility plan recommendation called for
over 300,000 linear feet of gravity sewer, 70,000
linear feet of force main, 28 wastewater pumping
stations, and two satellite wastewater treatment facilities. The project would be
designed and constructed utilizing over 12 construction contracts over a period of
eight years.

Due to the urgency of providing immediate watershed protection in the Industrial
Area of West Boylston and the Pinecroft Area of West Boylston and Holden, the
DCR selected Weston & Sampson to initiate the design and construction of these
construction contracts in order to proceed in a “fast-track” time frame. These areas
posed immediate threats to public health and the environment due to the documented
failures of on-site wastwater disposal. The projects included over 65,000 linear feet
of gravity sewers and two wastewater pumping stations. The design effort for the
fast-track projects was completed in only 95 days.

As part of the design effort, we were required to develop a state-of-the-art
instrumentation and control program that would provide Supervisory Control and
Data Acquisition (SCADA) capabilities for the operation and maintenance of the
wastewater treatment facilities and pumping stations. These facilities would ultimately
be operated by the individual! towns once the construction was completed,

The design documents for the fast-track project included a 2.0 million gallons per
day (mgd) custom wastewater pumping station. This SCADA system specification
was developed for all future wastewater treatment facilities and pumping stations.
When completed the SCADA system will be utilized to operate and monitor 16
wastewater pumping stations in Holden and 12 wastewater pumping stations and
two wastewater treatment facilities in West Boylston.

The SCADA design is a PLC-based system that polls key operation signals at
the pump station and monitors alarm conditions. Land-based telephone lines are
utilized to carry any alarm conditions to a call back service center. This system is
nonproprietary and allows for changing the central station or future installation of a
continuously manned central station by the town.

The installed SCADA system also has PC-based monitoring and data acquisition
capabilities. This system includes a local and remote PC, which allows the town to
remotely access the pump station through a dial-up modem. The PC is linked to the
main instrumentation and control panel at the pump station using commercial brand
man-machine interface control software. This system provides visual and numerical
real-time operation information for the pumps and all major ancillary systems
(sewage grinders, flow metering, stand-by power, gas detection, odor control, etc.),
and generates operational and trending data reports.

westonandsampson.com

eB datasystem
implementation

a development of
instrumentation and
control program
to provide SCADA
capabilities

g ability to meet critical
schedules

wu DCR coordination and
project requirements

ge strict environmental/
watershed
protection permitting
requirements

a inter-municipal/inter-
agency coordination

« SRF and state funding
assistance

client contact

Robert Lowell

Environmental Section Chief
Boston, Massachusetts
617-626-1340
robert.lowell@state.ma.us

Weston (Es) Sarmnson

EDMUND H. SARGENT WATER TREATMENT
PLANT CONTROL SYSTEM UPGRADE

town of wilrmingion massachusetts

The Town of Wilmington selected Weston & Sampson to provide design and
construction services for the Edmund H. Sargent Water Treatment Plant (WTP) contro!
system upgrade. The WTP treats water drawn from two separate well fields and a
large gravel packed well. These wells not only contain high concentrations of iron
and manganese, but also reside in a region where groundwater contamination from
the volatile organics is a distinct possibility. For these reasons, we designed a highly
flexible treatment process.

The treatment process consists of aeration, coagulation, flocculation, tube
sedimentation, deep bed carbon filtration, and disinfection. Chemicals added during
the process include potassium permanganate, polymer, alum, lime, and chlorine.
The combination of the processes and the chemicals resolved the iron, manganese,
taste, and odor problems while providing the ability (via the aeration and deep bed
carbon filtration) to remove volatile organics, if they occur.

The design incorporated a micro-computer-based contro! system. This system
provided for interactive graphic control of all the equipment including the speed
of the pumps at the remote well stations, maintenance and operational logging
functions, report generation, data retrieval, and historical trending. The MTU at the
Sargent WTP was replaced while maintaining plant operations. The SCADA system
upgrades included work at the Browns Crossing and the Salem Street raw water
pump stations as well as control system hardware and software upgrades

Our facility design incorporated the simple principle of providing optimal water
treatment performance while reducing capital, operations, and maintenance costs.
To this end, the Edmund H. Sargent Water Treatment Plant incorporates numerous
innovative ideas.

VSDs with high-efficiency motors operate all major pumping equipment. The
substantially less electrical requirements of these systems also reduce the
operational costs. The reduction in the size of the standby power system required
reduces the capital costs. Lastly, the VSDs operational flexibility is enhanced in both
the raw and finished water pumping systems. Having all five of the raw water pumps
operate on VSDs allows the operator to accurately control the volume of water from
each source. The VSD system on the finished water pumps gives the operator the
ability to match the pump rate with demand or with treatment volume.

westonandsampson.com

~@ construction
sequencing to maintain
plant operations

m replaced foxboro

control system with
open architecture
PLCs

client contact

Michael Woods
Superintendent
Town of Wilmington, Massachusetts
978-658-4714

Weston(&) Sampson

BACKGROUND

2017-Present
Associate
Weston & Sampson

2016-Present
Team Leader
Weston & Sampson

1997-2016

Project Manager /

Engineer / Resident Representative
Weston & Sampson

1996

Engineer Assistant
Hawkins, Webb and Jaeger
Associates, PC

1995
Carpenter
Desario Development Corp.

1991-1994
Carpenter
Onatier Construction Corp.

EDUCATION

1997

Bachelor of Science
Civil Engineering
Norwich University

PROFESSIONAL
CERTIFICATIONS

Local Public Agency (LPA)
Certification Training:
New Hampshire DOT

Wastewater Treatment Facility
Operator, Grade 2-OlT:
New Hampshire

PROFESSIONAL SOCIETIES
Water Environment Federation

New England Water Environment
Association (NEWEA)
Instrumentation & Automation
Committee Vice-Chair
(2015-Present)

Maine Water Environment
Association

New Hampshire Water Pollution
Centro! Association

westonandsampson.com

JOHN SYKORA III

John is a civil engineer with more than 20 years
of experience in design, project management,
construction administration and inspection, resident
engineering, and survey.

SPECIFIC PROJECT EXPERIENCE

Water Treatment Plant SCADA System,
Southbridge, Massachusetts. Project manager
for the engineering evaluation, finat design, and
construction services for upgrades to the water
treatment plant's SCADA system. Work included
replacing redundant PLC system for plant process
control, increasing communication speed between
PLC and devices by converting to ethernet, increasing memory in PLC system,
and upgrading PLC and SCADA computers and software.

Instrumentation and Control Systems for Quincy Point Pump Station, Quincy,
Massachusetts. Designed instrumentation and control systems for the $3
million upgrade of the city’s 7-mgd main pumping station. Work included the
renovation and improvement of the existing wastewater pumping station building:
removing and replacing equipment including the pumps and installing variable
speed drives (VFD); replacing the odor control unit; improved power distribution:
replacing standby generator, improved lighting, and wiring; installing a redundant
instrumentation and control system; local HMI touch screens; and integration of
vendor panels for odor control, HVAC, and wetwell mixing system. Designed all
functions and components of the system, such as instrumentation, and radio
communications network for monitoring of pump station from the city's DPW facility.

Acme Water Treatment Facility, Franklin, New Hampshire. Project manager for
the construction of the new 1.5-mgd, 8,000-square-foot Acme water treatment
facility in Franklin, which was funded in part by a loan and grant provided under
the American Recovery and Reinvestment Act and a short-term loan provided
under the New Hampshire State Drinking Water Revolving Loan Fund. Coordinated
construction of concrete, masonry, electrical, architectural, mechanical, plumbing,
HVAC, and water treatment systems.

Wastewater Treatment Plant Upgrade, Bethel, Maine. Project manager for a
wastewater treatment plant upgrade that included sludge dewatering design, new
influent sewage pumps, new grit pumps, and a new dewatering/storage building.
Worked collaboratively with the town to provide funding assistance, including Rural
Development Funding.

Water Treatment Plant, Concord, New Hampshire. Project superintendent for the
upgrades to the water treatment plant for the city.

Maplewood Avenue Area Preliminary and Final Design, Portsmouth, New
Hampshire. Sewer design engineer for the evaluation and preliminary and final
design services for sewer system improvements inthe project area. Responsibilities
included conducting a hydraulic assessment of the proposed Maplewood Avenue/
North Mill Pond inverted sewer siphon design; studying and summarizing the results
of CCTV inspections: assessing the feasibility of rerouting the existing gravity sewer
to avoid installing a sewer siphon; preparing Preliminary Design Memoranda and

Weston(&)Sampsor

PROFESSIONAL SOCIETIES
(cont.}

Chi Epsilon National Engineering
Honor Society

American Society of Civil Engineers
Treasurer

American Society of Military
Engineers
Order of the Engineer

westonandsampson.com

JOHN SYKORA III

conceptual design drawings; providing final design phase engineering services,
including cost estimate updates and preparation of final design documents and
drawings for use in bidding the project.

infiltration/Inflow Rehabilitation and Transportation Improvements, East

‘Rochester, New Hampstire. Provided engineering design on this $8 million

project.that includes construction of approximately 12,000 iinear jeet of new sewer,
13,500 feet of water main, 7,500 linear feet of sewer rehabilitation, rehabilitation
of a 550-gom pump station, the installation of a new 125-gpm pump station, and
transportation improvements including five miles of roadway reconstruction.

\/| Rehabilitation and Sewer Separation Program, Rochester, New Hampshire.
Project manager for the |/| rehabilitation and sewer separation program. Responsible
for monitoring the day-to-day construction of this project.

iA Identification and Removal Program, Wolfeboro, New Hampshire. Project
manager for the multi-phase 1/I identification and removal program that consists
of field investigation services to identify sources of |/!, followed by design and
construction of sewer separation and I/| rehabilitation. Design and construction for
the project is partially funded through the New Hampshire Siate Revolving Fund
and State Aid Grant programs.

Water Treatment Plant, Concord, New Hampshire. Project superintendent for the
upgrades to the water treatment plant for the city.

Traffic Circle Lift Station Relief Sewer, Newburyport, Massachusetts. Resident
representative for the traffic circle lift station relief sewer, which involved
decommissioning of a wastewater pumping station and installation of 10-inch
gravity sewers.

Weston Sampson

Jim Donchess

Mayor + City oF NASHUA

November 29, 2017
TO: FINANCE COMMITTEE
FROM: MAYOR DONCHESS

SUBJECT: Change Order #3

The contract with George Cairns and Sons was approved by Finance Committee on May 17, and the
Board of Aldermen on May 23, 2017 in the amount of $1,653,175. This contract is for the construction of
the Park and Ride at 25 Crown Street.

Since that time, there have been two change orders to the contract submitted thus far which changed the
amount of the contract to $1,638,060.80.

A new change order, Change order 3, adds a handrail which was required to comply with the American
with Disabilities Act requirements. This is the final change order for this project. This change order adds
$3,589.50 to the contract amount, bringing the total contract to $1,641,650.30.

229 Main Street * PO Box 2019 * Nashua, New Hampshire 03061-2019
603.589.3260 + fax 603.594.3450 * NashuaMayor@NashuaNH.gov
www.NashuaNH.gov