UNH Boiler Plant MTR-2026-7-13.pdf

Minimum Technical Requirements

University of New Hampshire Boiler Plant

Durham, NH

Revision: B

Date: July 13, 2026

Elevated Design Inc.

1212 Hancock Street Suite 300

Quincy, MA 02171

UNH – Durham, NH

Minimum Technical Requirements Document

UNH MTR Rev B July 13,2026 2

Contents

I. Introduction

II. Definitions

III. Project Overview

IV. Project Scope

Design Concept

V. Reference Drawings

Existing Documentation

VI. Design Requirements & Site Conditions

Site Location

Site Access

Existing Plant Description

Stack Demolition

Existing Boiler Demolition

Fuel

Potable and Makeup Water

Boiler Requirements

Condensate Return & Tank

Process Waste Water

Sanitary Waste water

Fire Protection

CHP & Old Plant Interconnections

Climate Action Plan – WildCAP 2021

VII. Design Basis

Site Design Conditions

Fuel Design Basis

Water Design Basis

Mode of Operation

Thermal Load

UNH MTR Rev B July 13, 2026 3

Ambient Noise

Plant Demand and Distribution Pipe Sizes

VIII. Performance Guarantees

Emissions

Performance

IX. Project Requirements

Owner Provided Material

Project Management/Construction Management

Change Orders

Quality Control

Environmental Permitting

Data Communications Coordination

Engineering/Procurement

Field Engineering Support

Technical Documentation

Startup & Commissioning

Labeling

Site Security and Safety

Fire Watch

Dangerous Materials

Spare Parts

Site Access

Construction Facilities, Services, Utilities

Equipment and Materials Receiving, Unloading and Temporary Storage

Materials Delivery & Lay Down Areas

Rigging

Protection of Adjoining Utilities

Campus Operations

Interconnections

Demolition

Asbestos & PCBs

UNH MTR Rev B July 13, 2026 4

Cut & Patch

Temporary Construction Facilities

Traffic & Parking

Waste Disposal

Permits

X. Mechanical Equipment

Boiler Requirements

Combustion Air Supply & Exhaust

Quality and Experience

Service

Economizer

Emissions Monitor

Deaerator

Boiler Instruments and Controls

Guarding

Finish

Factory Acceptance Testing

Compressed Air

Pumps

Feed Water Pumps

Piping Systems

Equipment Pads

XI. Mechanical Systems

Fuel Gas System

Fuel Oil System

Fire Protection System

Floor Drains

Chemical Feed and storage

XII. Building Services

Showers & Eye Wash

UNH MTR Rev B July 13, 2026 5

Lavatory

Operating Floor

Lighting

Building Roof

XIII. Civil/Structural

Site Survey

Access

Foundations

Structures

Lifting Equipment

Crash Posts or Guard Rails

XIV. Architectural

Doors

Equipment Access Doors and Panels

Flood Protection

XV. Electrical

Existing System Description

Distribution & Transformers

New System Description

Emergency Generators

Project Execution:

Electrical Drawings

Electrical Specifications

Electrical Studies

Motors

Cables & Raceway

UPS and Battery

Heat Trace

Communication

Video Cameras

Grounding

UNH MTR Rev B July 13, 2026 6

Lightning Protection

Cathodic Protection

XVI. Instrumentation and Controls

Plant Control System

Instrumentation

Monitoring System Requirements:

XVII. Energy Conservation Measures

Hot Water Preheating

Biodiesel or Renewable Diesel

Biogas/ Renewable Natural Gas (RNG)

Low Grade Steam

UNH MTR Rev B July 13, 2026 7

I. Introduction

UNH has performed a significant amount of work preparing existing building drawings, schematic design, and cost estimates to understand the scope and magnitude of the project that is being implemented. In 2024, AEI and Consigli prepared four design options and provided a cost estimate for each option. In 2026 Elevated Design has performed a laser scan of the ‘old plant’ and converted much of the content to BIM elements such that the drawings represent accurate components of the existing equipment, piping, and building infrastructure. The Action Items list provides documentation of design decisions that are complete and in progress. The drawing list (section V) provides the information that is available from prior construction projects. Finally, this document, the Minimum

Technical Requirements (MTR), is intended as a living document that will eventually be used as part of the contract bidding documents. At this time, it represents the summary of design decisions and intended scope that has been completed and pairs with the drawings and Action Items. The engineer is expected to update and complete this MTR such that it will document design intent as shown on the contract documents and can be part of the final construction contract.

This Minimum Technical Requirements (MTR) Document specifies the project design, basis conditions, and the minimum design criteria for the engineering, design, construction, commissioning, startup, and testing of the University of New Hampshire’s

(UNH) boiler plant project. UNH has four existing boilers in its old power plant that supplement steam produced by the cogen plant. The cogen plant includes a 4.5 MW

Mercury 50 Solar Turbine (without heat recovery) and a 7.9 MW Siemens SGT300 turbine with Heat Recovery Steam Generator (HRSG) and duct burner to produce 150 psi steam to meet the campus’ heating needs. Within the old plant there is (3) 75 kW back pressure steam turbines and air cooled condensers being installed in 2026. The four existing boilers serve as backup heat sources for the campus. One boiler is a modern Cleaver Brooks that was installed several years ago. Two of the boilers slated for replacement are 1960’s

Babcock Wilcox dual-fuel (natural gas and oil), and one boiler is a 1960’s Babcock Wilcox oil-only. These aging units now require either significant maintenance or full replacement.

A feasibility study completed by Consigli Construction Co., Inc and Affiliated Engineers in

August 2024 recommended demolition of all three boilers and installation of two new firetube boilers.

The project includes all required piping, equipment, and appurtenances to make a complete, functional, and reliable project. (1) 800 kW Emergency generator will be installed to provide electrical backup.

UNH MTR Rev B July 13, 2026 8

The intent is that the boilers will meet the normal heating demand of UNH even if the cogeneration plant is completely offline. These boilers are considered hot standby and are kept at pressure to allow for immediate backup with no interruption to steam delivery.

II. Definitions

BTU British Thermal Unit

CEM Continuous Emissions Monitoring

CHP Combined Heating & Power

CW Cooling Water

NHDES NH Department of Environmental Services

FW Feed Water

HP High Pressure

HRSG Heat Recovery Steam Generator

LP Low Pressure

NAAQS National Ambient Air Quality Standards

NEC National Electric Code

PLC Programmable Logic Control

SCF Standard Cubic Feet

SCR Selective Catalytic Reduction

III. Project Overview

The UNH Campus has an overall commitment to sustainability and this project fits within that commitment by providing reliability to the heating system of the campus. The project significantly improves UNH’s resiliency and ability to maintain operations during extreme weather events.

The UNH boiler plant project is based on two (2) fire tube steam boilers each

40,000 MBH (1200 boiler horse power). Both shall be dual fuel natural gas fired with fuel oil fuel backup. Natural Gas is also used to supply (1) 800 kW diesel generators for added resiliency. Fuel oil will be provided by the existing 52,000-gallon fuel tank located approximately 40 feet west of the building. The standby boilers will be equipped with stack dampers and other provisions to minimize startup time if the turbine trips unexpectedly.

The facility will also replace the steam to hot water heat exchangers and the existing steam driven hot water pumps. Significant amounts of piping will also be replaced.

UNH MTR Rev B July 13, 2026 9

Low pressure steam will be obtained through existing pressure reducing valves and the back pressure steam turbines being installed in 2026. The low-pressure steam supplies seasonal building heating and cooling as well as year-round process loads.

The current design intent is to replace the 1970’s 480V switchboard that serves the old plant. This is presumed to be at end of life and not suitable for serving the building for the next 30+ years. Existing expansion in the age of heat pumps and electrification should be considered. However, given the extreme uncertainty around the amount of electrification that will be required over the next 30 years, the engineer should review the existing equipment and evaluate if it could be effectively used to serve the updated needs of the building. It may be more prudent to utilize the existing electrical infrastructure and perform a more robust system upgrade when an electrification project requires the additional capacity.

The plant will utilize the existing HRSG’s and three standby boilers by one operator. The controls for all equipment will be integrated into an overall master plant control system.

The intention of this project is to demolish as much abandoned equipment and piping as possible and to avoid abandoning in place. The three existing boilers, combustion fans & ductwork, flues, stack and all other abandoned equipment should be removed. Anything that will be abandoned in place for cost reasons must be clearly negotiated and documented.

IV. Project Scope

The project scope of supply includes permitting, procurement, vendor coordination, equipment supply, installation, commissioning, training, startup, testing, and other services required for a fully operable steam plant. Construction of the plant and future operations must be designed for minimal disruption and seamless operation. Reliability, redundancy, and maintainability are the primary goals of this project. The major equipment, structures, systems, and activities are described in this document.

The boilers will be supplied in a preassembled and modularized assembly that has been pretested at the manufacturer level. They will be shipped in modular units and installed in the new building. The design phase will determine if a feedwater economizer at the exhaust flue will be incorporated.

UNH MTR Rev B July 13, 2026 10

Installation access for the two firetube boilers is a significant concern and the current approach includes demolition/removal of a significant portion of the roof to allow for crane access. Weather protection during this process is a moderate concern since the existing-to-remain boiler must remain operational throughout the construction project. It may require the front swing out door assembly including burner to be removed to fit in the building and reassembled. The engineer and contractor will evaluate if other support equipment including raw water makeup, de-aeration, feedwater treatment and feedwater pumps will be shipped in preassembled modules and rigged into the building. Once the major equipment is installed, then the roof will need to be re-constructed. The engineer will determine if any spaces will be cooled with fan coils.

Emergency stop switches for the steam generating devices will be installed at each exit door.

The boiler plant will be controlled from the existing control room. NH does not have a licensed boiler operator requirement or visual attendance requirements, but best practices will be followed to allow safe operation. The control room scope of work will include extending the existing Programmable Logic Controller (PLC) based control system to the new boilers and to existing boiler 4. There will be primary station for operator use located in the control room as well as any equipment specific control screens. The control system will be visible to authorized UNH staff via a webserver but actual operation must be done from the control room by an operator, making the webserver read only.

The project may require existing windows to be replaced with louvers, but the design intent is to utilize existing combustion air pathways or makeup air fans.

Combustion rates are not increasing from existing firing rates and facility has not had issues with negative pressure. However, an early combustion calculation implies that the building will not qualify for natural infiltration. If allowed by code and best engineering practices, then existing air pathways will be utilized.

Consider an industrial blower door test to show that airflow is safely delivered to the space without depressurizing the building. Alternatively a makeup air unit can be utilized if required, but code required louvers are not recommended. Consider

MAU’s in the high portion of the building and utilizing the boarded up windows.

The contractor will develop any required applications and exhibits, attend meetings on the owner’s behalf and coordinate the overall local and state environmental permitting.

The major scope for the boiler plant includes:

UNH MTR Rev B July 13, 2026 11

Owner Supplied Scope

Builders Risk Insurance (could also be provided by the contractor TBD by the owner during the design phase).

Contractor Supply Scope

Major equipment

Project management, construction management

Design, engineering, procurement services

Environmental Permitting

Construction permitting as identified in the contract, including the Building permit and drawings necessary to secure building permit

Other permits needed to achieve commercial operation

34.5kV feeders, transformer, and 480V distribution

Boiler control system integration to existing PLC

Plant interconnects and relocations to steam, and other required plant interconnections (air, water, wastewater, etc.)

Natural gas piping system downstream of utility meter including minimum

1-minute resolution utility grade metering

Plant commissioning and startup

Performance testing of boilers

Operational testing (e.g. cold start, fuel switching)

Development of training materials, coordination of vendor training and overall plant training of plant staff

Emissions and noise testing

Noise analysis and attenuation recommendations (if required)

Local Permits including special resource zone approvals (if required)

Title V Operating Permit for air emissions

NHDES permits

Design Concept

The contractor shall provide a boiler plant that is modern, safe, and provide high availability, low outage rates, with a high level of automation to reduce requirements on building staff. Provisions will be included for remote viewing of boiler, plant status, and historian screens within the UNH facility by authorized staff. Actual control of the boiler systems will be at the existing control room staffed by a UNH operator. The capability for third party remote monitoring of the plant operations already exists and does not need to be added. Any dispatch of the plant will be performed by the operator.

The following assumptions and design conditions were used and must be confirmed by the Engineer of Record site gas pressure of 100 psig (guaranteed to be at least 40 psig) with pressure reducers to 18 psig to match boiler pressure

UNH MTR Rev B July 13, 2026 12 requirements, a process steam pressure of 150 psig, a 90% condensate return rate and deaerator pressure of 5 psig.

The existing cogen plant and boiler will remain in operation during the construction and after the project is completed. The existing condensate tank and deaerator must remain in operation during the construction process. The new condensate / surge tank must be made active before demolishing the existing condensate / surge tank. The deaerator will need to be replaced during a limited duration plant outage. Careful planning and coordination will be required to minimize the duration of the shutdown. Provisions to prevent interruption of plant operation shall be incorporated into the project planning and design. Tie-ins will be minimized and grouped to be made during a mutually agreed upon schedule and are to be identified in the project schedule. Tie ins and the required materials to make them will be designed and available to be installed on short notice if opportunities become available. Work on the steam to water heat exchangers must be performed outside of the heating season.

The demolition and general plant arrangement of the facility is shown in the

M101-M108 and M900-M902 drawings dated 7/12/2026.

V. Reference Drawings

Existing Documentation

A Revit model of the old plant and the point cloud scan are available.

The following documents are available in hard copy and may be available in PDF formats or can be scanned to support the design efforts.

Available Drawings

Reservoir Pump "old" 3 Sheets

Large Air Comp. 1922 3 Sheets

Orig. Constr. 1927 8 Sheets

Conc. Chimney 1927 2 Sheets

Reloc. Util. for Heat Add 1948 Apparatus & Boiler Rm Plans 1949 22 Sheets

Fuel Oil Valve - R.O.O Boiler 1952 1 Sheet

B&W - FF Boilers 1957 & 1963 Boiler Rm - Flue & Supply Air 1958 2 Sheets

Soot Blower Equip. FF Boilers 1961 1 Sheet

Boiler/Fan Rm - Air Ducts & Flue 1963 1 Sheet

Apparatus Rm - Pump & Convt. Add. 1964 1 Sheet

Cent. B.P. Exp - Struct. Shop 1970

UNH MTR Rev B July 13, 2026 13

Cent. Boiler Plant Expansion 1970 Foundation Reinf. 1970 1 Sheet

Hermet Stack - HMHS 1971 1 Sheet

Steam, Conden., HW Piping 1974 1 Sheet

Intercep Chamber 1975 1 Sheet

Energy Study 1975 3 Sheets

Turbine 1983 1 Sheet

Emerg. Gen. 1985 5 Sheets

Cogeneration 1986 7 Sheets

Conden. Pump 1986 1 Sheet

Elec. Modif. 1986 10 Sheets

Piping Scheme 1990 4 Sheets

Flue Gas Breeching 1993 1 Sheet

Flue Gas Breeching 1993 Equip. Layout & Heat. Schem 1993 2 Sheets

Therm. Sys. Imprv. Exist. Cond. 1993 1 Sheet

Renovations: Bid Set 1995 24 Sheets

Renovations: Record Set 1995 22 Sheets

VI. Design Requirements & Site Conditions

Site Location

The boilers and equipment will by in large be in the same locations as currently occupied. Piping and ancillary equipment that was replaced during prior maintenance projects will be existing to remain. All piping must be evaluated for continued reuse.

The building will be repaired with architectural façade work being completed as needed.

Site Access

There are multiple entrances to the boiler plant and an important pathway under the railroad tracks. UNH will temporarily close portions of the space around the boiler plant for the duration of major construction. A temporary fence will be installed with a temporary construction gate to access the construction site. See

Consigli Exterior Logistics drawing identifying cranes, fencing, and access.

Existing Plant Description

The existing central utility plant is located at 2 Library Way, Durham, New Hampshire.

The building consists of a modern building housing the Combined Heat and Power plant and the ‘old plant’ which houses the boilers, back pressure steam turbines, and

UNH MTR Rev B July 13, 2026 14 steam to hot water converters. The renovated old plant is intended to work seamlessly with the existing central utility plant.

Electricity is currently provided by the Combined Heat and Power plant and

Eversource is the Utility.

The new boiler’s steam will be tied to the existing steam distribution main at the current tie-in locations. The old plant currently utilizes five heating hot water pumps and eight steam to hot water heat exchangers that will need to be replaced during the summer.

The old plant currently has roll up doors and access panels that will allow most major equipment to be moved into the building. However, the two boilers will not fit though the building access points and will need a hole cut into the roof to accommodate. The engineer should consider alternative boiler selections that would allow for access through the current roll up door and eliminate the need for crane access through the roof.

Refer to attached drawings M101-M108 for existing central system layout and new connection locations, distribution, pipe sizing and expected load requirements.

Stack Demolition

The existing stack is 160ft tall and has an internal exit diameter of 6ft and an external diameter of 14ft at the base. Project shall remove the stack and breeching located on the roof of the old plant and connected to the boilers. The engineer will determine if the foundation can be existing to remain and if any remediation is required. Engineer to determine final grading and changes to site after demolition of the stack.

Existing Boiler Demolition

A full height dust wall will be constructed between boiler 4 and the remaining construction scope. Within other portions of the project, the contractor will be responsible for ensuring this project does not interfere with existing operations of the plant. Existing boilers 1, 2, & 3 will be completely demolished including, breaching, stacks, control stations, wiring, piping, monitoring, and anything not required for the continued functioning of the plant.

• Boiler 1 B&W Model FF2972 47.3 mmBtu/hr installed in 1963

• Boiler 2 B&W Model FF2972 47.3 mmBtu/hr installed in 1963

UNH MTR Rev B July 13, 2026 15

• Boiler 3 B&W Model FF2713 47.3 mmBtu/hr installed in 1958

Fuel

The preferred fuel for the central plant is Processed Landfill Gas (PLG) from the

12” EcoLine, which extends 12.6 miles to the Turnkey Landfill in Rochester, NH.

The processed landfill gas is cleaned of siloxanes and other impurities at the

Turnkey Landfill before being piped to UNH. There is a storage tank across the roadway at the north side of the old plant. PLG enters the facility at 100 psig on the north side of the old plant. The PLG has lower btu per SCF but does not require significant modifications to the boilers. PLG has a heat content of approximately

500 Btu/scf. This PLG has been treated to reduce sulfur and siloxanes but has not been further treated to reduce carbon dioxide. Pursuant 40 CFR 75 Appendix D

§72.2, the PLG meets the definition of Natural Gas through either the percent methane (70 percent methane by volume) or GCV (between 950 and 1100 Btu/scf) requirement and has a total sulfur content of 20 grains/100 scf or less and 0.060 lb SO2/MMBtu heat input or less.

Utility fuel for the central plant is natural gas supplied by pipeline from Unitil.

Backup fuel for the plant is from the 52,000 gallon Fuel Oil tank located west of the Old Plant. The existing gas and oil lines will be reconfigured to serve the new boilers. The existing service and capacity is adequate. Fuel Oil pumps, delivery system, and day tanks are expected to be existing-to-remain, but must be confirmed by the engineer.

A utility (revenue) grade gas meter will be required at each of the three boilers.

The meters will be utility grade temperature corrected and shall be equipped with a high-resolution flow meter head to allow a minimum 1-minute resolution of flows. They will be equipped with totalizer and remote readout capability.

The secondary fuel source supplied is diesel fuel oil supplied by a distribution company to fill the site storage tank. A separate meter shall be provided to read the fuel oil usage to the boilers.

Potable and Makeup Water

Makeup water will be supplied from the existing municipal water system. It will be treated as needed to ensure that boiler feedwater will meet or exceed the minimum feedwater requirements of the boiler manufacturer and the HRSG manufacturer. A raw water analysis is not required for this project since raw water supply has been historically good quality and existing chemical programs are sufficient.

UNH MTR Rev B July 13, 2026 16

The new boiler feedwater system will be equipped with makeup water capability to support 20% fresh water makeup with the remaining feedwater supplied from returned condensate. The existing condensate collection system and tanks will be replaced as necessary to feed the steam system. A deaerator sized for the maximum steam generation output will be installed along with associated feedwater pumps and support equipment. The current system for delivering chemicals is generally adequate and will only be reconfigured for space and tank sizing. The delivery process consists of totes pumped into the onsite barrels. The site currently does not use excessive blowdown or makeup water allowing for standard chemical treatment systems.

Boiler Requirements

Engineer to confirm that SCR pollution controls are not required for emissions.

Stack modeling is a requirement to update the existing Title V Operating Permit for air emissions.

The combined heat and power plant and old plant use a mix of high pressure and low-pressure steam. The high-pressure steam must be at a pressure of 150 psig with 0 °F of superheat. The high-pressure steam is used for a variety of services and also leaves through the south east corner of the old plant to further campus distribution. The low pressure steam is reduced through the back pressure steam turbines or pressure reducing valves (PRV’s). The steam is 5 psig and supplies

HHW heat exchangers, the deaerator, and an absorption chiller and does not leave the old plant.

The new boilers will be equipped to produce high pressure steam only. The boilers will be firetube style high pressure units equipped with automated stack dampers and a standby heating option where the burner is cycled to maintain the boiler in warm stand-by mode. The standby operation of the boilers will be programmed to operate only in the event of a turbine shutdown, planned or unplanned.

Condensate Return & Tank

Condensate return piping will be largely unchanged and only re-fed to the new condensate / surge tank. The existing condensate receiver systems will be modified and new condensate piping routed to the new condensate / surge tank.

Process Waste Water

New boiler drains will be routed to existing sump. The new drains will be routed through an oil and water separator. The sump will be equipped with a duplex pumping set and pumped to a sanitary waste water connection. The sump will be

UNH MTR Rev B July 13, 2026 17 monitored and alarmed for temperature. The temperature to be returned to the sanitary sewer may not exceed 150°F.

Sanitary Waste water

The boiler plant existing sinks, water closet, and shower will utilize the existing to remain routing to the nearest existing sanitary sewer.

Fire Protection

The CHP plant has a wet standpipe fire protection system throughout the facility, supplied by a loop header around the site. However, the old plant does not have a sprinkler system. This project will add a wet standpipe system fed from the existing underground supply loop or possibly from the CHP plant.

CHP & Old Plant Interconnections

The contractor is responsible for the design interface with existing facility utilities and systems adjacent to the project site. The following interfaces are required.

TP System Tie-In Location Rating or Capacity Comments

Electrical

Interconnec tion

Existing switchgear building

(2) utility feeders at

13.8 kV each

(2) utility feeders to

New motorized synchronizing breaker(s).

Design to be per

ISO/NE &

Eversource standards.

Make up water

XXX city water supply backflow station

XXX

Separate Metered supply & backflow preventer ETR.

High pressure

Steam

Multiple connections per the drawings

150 PSI

Low

Pressure

Steam

Multiple connections per the drawings

5 PSI

5 Natural Gas Existing Reconfigured 100 psi with PRV to

18 psi ETR

UNH MTR Rev B July 13, 2026 18

TP System Tie-In Location Rating or Capacity Comments

Service &

Instrument air

Existing Reconfigured XXX - SCFM Existing distribution system is adequate

Process

Waste

Water

New Sump connected to sanitary through an oil separator

XXX

Oil and water separator &

Backflow preventer required before discharge, 150°F max discharge

Fire

Protection

Supply

Underground Main

TBD

TBD

Complete new system separate from CHP

Sanitary

Waste

Water

Existing Reconfigured XXX

XXX

Condensate

Return

Return condensate pumping system from various locations as per the drawings

XXX

Pumps as per the drawings

Fire

Protection

Alarm

Panel

XXX XXX

Internet

Communica tion

Boiler Plant IT Room IT coordination required

14 Phone Existing to Remain Office and control room

UNH is self-insured but this project will incorporate TBD insurance and bond. For all specifications in this document the contractor shall reference Zurich Insurance guidelines and standards. Where Zurich Insurance is silent, FM Global’s design criteria shall be utilized with UNH providing direction when there are

UNH MTR Rev B July 13, 2026 19 discrepancies. Zurich Insurance is the UNH Risk Consultant that will act to review and approve plans from a risk basis.

Climate Action Plan – WildCAP 2021

The goal of this design is to support New Hampshire’s and UNH’s climate action plan, which sets a goal of reducing its primary Scope 1 and Scope 2 emissions 75% below 20210 levels by 2030.

VII. Design Basis

Site Design Conditions

The ambient design conditions are shown in Table 1.

Wind loadings shall be per New Hampshire State Building Code.

No Site drainage work.

Foundations shall be reviewed by an engineer for suitability for continued use.

Seismic design for all buildings, structures, and components shall be in accordance with the New Hampshire State Building Code for Soil Class D.

All above is subject to insurance carrier review.

Table 1

Environmental Design Basis1

Parameter Units Design

Elevation ft ASL 31

Ambient Pressure psia 14.64

Heating Dry Bulb @99% °F 8.1

Humidity Ratio @99% 2.9

Extreme Annual Dry Bulb (max) °F 94.7

Extreme Annual Dry Bulb (min) °F -3.3

Cooling Dry Bulb @1% °F 86.5

Cooling Wet Bulb @1% °F 71.4

Evaporation WB @1% °F 73.9

Evaporation Mean Coincident Dry Bulb °F 82.7

Average Wind Velocity mph 7.6

Precipitation in 48.6

UNH MTR Rev B July 13, 2026 20

Parameter Units Design

Snow Load psf 60

Basis 2025 ASHRAE Handbook-Fundamentals, Pease International Airport.

Fuel Design Basis

The project will use processed landfill gas as the preferred source. Unitil provides utility grade natural gas to the plant. The project will also use fuel oil to supply the three boilers.

Table 2

Natural Gas Analysis

Example Gas Quality Summary Matrix for

UNH MTR Rev B July 13, 2026 21

End-Use Design & Tuning Considerations2

Water Design Basis

The boilers use raw water from the local municipal water supplier, which is treated before use. After treatment the water must meet all of the requirements of the existing HRSG and new boilers.

Mode of Operation

During normal operations the Combustion Gas Turbine, Duct Burner, and Heat

Recovery Steam Generator (HRSG) provide all of the steam required for the campus. One boiler is kept in hot standby so that a failure of the gas turbine system would allow for this boiler to immediately provide steam.

The system will be capable of islanded operation isolated from the utility grid. The boilers will be equipped for black start operation against a non-energized local utility bus. Two new standby diesels will be installed and configured for black start.

A critical spare parts inventory will be maintained by UNH to support a preventative maintenance program and provide the necessary replacement parts in the event of an emergency breakdown.

Thermal Load

Limited 8760 steam monitoring data is available and updated data will be provided as available.

Ambient Noise

This project is not anticipated to significantly impact noise concerns at the campus. However, standard practices should be followed to avoid excessive and unnecessary noise within and outside of the boiler plant. During startup, steam blows and testing of safety relief valves will need to be coordinated with the facility. It is anticipated that the project will not require a noise study.

2 Gas analysis from another project in New England. Not all pipeline tariffs have these specifications currently in place or may differ slightly from one another. Values provided are typical of pipelines serving the Northeast Region. Values reported in this table are not guarantees.

Objectionable matter includes solids, gums, tars, bacteria, free liquids, etc.

UNH MTR Rev B July 13, 2026 22

Plant Demand and Distribution Pipe Sizes

Pipe lengths provided have been determined by overall distance between connection points. Additional lengths will need to be considered for elevation changes and routing obstructions and length through building structures-

VIII. Performance Guarantees

The contractor is required to demonstrate the performance guarantees for capacity, efficiency, reliability, and emissions. The contractor shall prepare, for

Owner approval, test procedures, and a test schedule 90-days prior to the scheduled startup. 3rd Party commissioning is required and will be hired directly by the owner.

Emissions

Stack emissions must comply with all State (NHDES) and Federal regulations including an update to the Title V Operating Permit air emissions (see

“Environmental Permitting” section). An SCR is not required but will be confirmed during the engineering phase.

The maximum emission limits for the project will be determined during the engineering phase.

Air Emission testing will be done at CEM ports on the boiler stacks. The scope of work covers one complete air emission testing cycle by the contractor. If the plant equipment does not pass the initial air emissions test, the contractor will pay all costs for retesting, repairs and alterations required to meet the permitted limits with no additional compensation by the Owner.

Stack heights are expected to match the existing Boiler #4 stack height, which is

>60ft above grade and >20ft above the low roof surface. Maximum stack exit diameter is 2’-8”. Air modeling will be required to update existing Title V

Operating Permit for air emissions and to demonstrate the operation of the new boilers will not exceed National Ambient Air Quality Standards (NAAQS).

Modeling will be completed during the engineering phase.

Performance

The plant performance will be validated with a performance test to verify the guaranteed performance. The basis for the emission performance guarantees is shown in Table FUTURE. The test procedures are described below - and Exhibit

FUTURE of the contract.

UNH MTR Rev B July 13, 2026 23

The contractor shall conduct performance tests to verify the Performance

Guarantees identified in the Contract. The contractor shall provide all temporary test instruments, calibration, labor, and parts for the tests. Owner will supply the fuel and thermal load for the test.

The costs for third party testing including emissions and performance will be covered by the contractor for one set of tests. If the tests do not meet the contractually agreed guarantees, all additional testing costs will be paid for by the contractor or their subcontractors.

During the tests, the equipment will be operated in a normal, automatic mode as expected for the long-term operation of the facility. System overrides are strictly prohibited without prior written permission granted by the owner. Equipment shall be operating in accordance with manufacturer specifications and in compliance with Local, State, and Federal laws, rules, and regulations.

Prior to testing, all instrumentation used for the test will be calibrated. Records of calibration within 90 days before the test shall be provided prior to the start of the tests. Calibration shall be NIST traceable.

The parties agree to develop a mutually-agreeable set of testing requirements, protocols and accuracies that should apply to each test.

The emissions test, used to verify the emissions guarantees, may be performed concurrently with the plant performance tests. The emissions test must demonstrate that the plant can meet all requirements of the Title V Operating

Permit air emissions and meet all requirements of NHDES and EPA rules and regulations.

At the completion of testing, all data will be provided to the parties to the test. A

Test Report will be prepared and issued by the contractor to the owner for approval within two weeks of receipt of natural gas samples.

The following demonstration tests are required:

1. Reliability Test

3. Black start on processed landfill gas

4. Black start on fuel oil (with natural gas to ignite the burner)

5. Full load performance on processed landfill gas, natural gas, and fuel oil

UNH MTR Rev B July 13, 2026 24

IX. Project Requirements

Owner Provided Material

The owner will provide the following for the project:

A Project Manager as a single point of contact for the contractor

Fuel for the boilers

Water

Electricity for Contractor

Chemicals, consumables, oils following first fill and completion of commissioning, startup, and testing (Substantial Completion, as defined in the contract)

Project Management/Construction Management

During the construction phase, a systematic project management approach is required for the project. Within one month after Notice to Proceed, the following documents will be provided to the Owner:

Project Plan

Permitting Plan

Labor Plan

Health & Safety Plan

Quality Control Plan (to include Owner Witness Points)

Identification of lay down, parking, and recycling areas

A detailed project plan will be prepared by the contractor. The project plan will identify the performance metrics for the project including:

Project Scope - The project contract defines the project scope.

Project Budget - A detailed budget will be provided. The budget will be updated and reported monthly. It will include costs and commitments incurred during each month as well as running total. The budget categories will be broken down in enough detail to track cost variances in major systems.

Project Schedule – During the construction phase, a detailed Level 3 project schedule will be provided. The schedule will be developed and updated at least monthly. The schedule shall identify the design, fabrication, shipment, and installation for all equipment. It will also include environmental permitting, interconnection process status Data communication provisioning. Major milestones will be included. During construction, the progress will be reported weekly. The critical path will be evaluated and monitored through the project phases.

UNH MTR Rev B July 13, 2026 25

Risk Management - The contractor will develop a risk management plan that includes risk descriptions, severity and mitigation plans.

Project Reports and Meeting – Weekly onsite meetings (and/or conference calls) will be held with the capability for team members to conference call in. A project report shall be submitted monthly in electronic format within 5 days of the month’s end. The report shall present progress and indicate any problems or issues, each with a proposed resolution. An updated Level 3 schedule, based on the baseline schedule, will be provided to reflect actual progress. During startup/commissioning, daily meetings will be held.

Communications Plan - Because the project will be installed at an operating plant, communication will be an essential requirement of the project. A communications plan to provide effective team integration is required.

A Team Matrix of Responsibilities will be developed to identify primary and secondary responsibilities, responsibility for review and identification of those who are required to be informed.

Change Orders

The contract requires a change order log that will track change order requests and change orders approved. This log will be kept up to date and submitted with the monthly report.

Change order requests will consist of a change order title, a change order unique identifier, a description of the current scope in the approved project, the approved expenditure assigned to the scope, a reason for the change order request including the deficiency in the original scope and/or the potential benefit to approving the change order, the estimated cost of the change order and if the change order cost is fixed price or time and material. In all cases, the change order request will be submitted and approved by the UNH project manager in advance of cost commitments or work being completed. Work done prior to approval of a change order by the plant by the contractor is done at risk by the contractor. The contractor will submit a sample copy of the change order request form to be used.

If the project is a Guaranteed Maximum Price (GMP) contract, then the change order log shall also identify if the changes are from the contingency or an increase to the GMP. In addition to the Change Order Log, the contractor shall also maintain a buyout cost tracking of the entire project. The Buyout Log shall initially be populated with all the cost estimates that create the GMP

UNH MTR Rev B July 13, 2026 26 pricing. Throughout the life of the project as prices are actualized, they shall be tracked as well as estimated remaining costs so that the entire project team can track if the base project is tracking higher or lower than the original GMP estimates. The net increase or decrease from the Buyout Log shall be shown on the Change Order Log as a potential change order that is NOT an increase to the

GMP. During the bidding phase the contractor shall also provide representative examples of changes that do and do not increase the GMP. Both parties shall agree on the categorization of these examples before signing the GMP.

The project manager and the construction manager shall remain on the project unless 1. The contractor provides a replacement and is approved by the owner or

2. The Owner requests that a replacement is provided.

The contractor shall appoint a senior executive with the responsibility for supervising the successful completion of the Work and shall remain aware of the

Contractor’s obligations and performance. This executive shall be available at reasonable times for consultation.

Quality Control

A quality assurance, quality control system is required to ensure that the project is designed, constructed, and commissioned in accordance with codes, standards, regulations, and equipment provider’s requirements.

The system will be documented in a QA/QC manual for approval by the owner.

The contractor shall:

Designate one of its employees to act as the quality assurance/quality control manager to be responsible for implementing the Contractor’s quality assurance/quality control program

Assure that no material supplied shall contain asbestos except as permitted by EPA Regulations (40 CFR 763.145)

Provide 7 days’ notice prior to an Owner Witness Point

Environmental Permitting

UNH will be responsible for environmental permitting of the project with support from the engineer and contractor. UNH will directly contract with the permitting consultant to complete all required Title V permitting. The boiler project will require a NHDES New Source Review (NSR), which is a preconstruction permitting

UNH MTR Rev B July 13, 2026 27 program serving to establish and document air pollution emission limitations from

“major” sources of air pollution. Permit will include Prevention of Significant

Deterioration (PSD) filing, which applies in areas where the air quality is classified as meeting the National Ambient Air Quality Standards (NAAQS). PSD review and permitting is intended to allow construction of new or modified sources of air pollution in these areas while protecting (i.e., not significantly degrading) air quality. This will be a revision to the existing Title V Operating Permit number TV-

0010 issued September 16, 2024 for Facility ID 3301700009. The contractor will work closely with the UNH environmental manager but UNH will take the lead on the permitting effort.

Data Communications Coordination

The contractor will develop a list of required Internet communications between applications inside the plant outside parties describing the software applications and if they are inbound, outbound or both. The UNH Information Technology group will need to review and approve all traffic that goes through the UNH network.

Engineering/Procurement

The Owner is responsible for engaging the professional design and engineering of the Work. Professional engineering certifications, required by any applicable law will be provided. Any omissions from this MTR or the Engineered Drawings regarding the design, services or equipment shall not relieve the Contractor from furnishing design, services or equipment as required in order to furnish a complete, operable, safe and reliable Facility capable of performing the intended service.

All equipment furnished shall be suitable for the intended service over the lifetime of the project. The equipment supplier shall provide guarantees for the equipment that will survive at least one year after Substantial Completion (and/or

18 months after shipment, whichever is greater). The supplier must accept terms for replacement of any material or equipment furnished which is defective in material, workmanship, or design.

The expected engineering services include:

Preparation of detailed technical specifications. Interface with equipment manufacturers, addressing technical issues, managing procurement including, monitoring equipment, delivery schedules, installation coordination, vendor field

UNH MTR Rev B July 13, 2026 28 support, and equipment testing. Technical specifications will be sent out for review and approval by the owner and owner’s representatives.

The major disciplines shall design basis documents for Owner review and approval.

The contractor shall provide design documents in accordance with the project schedule. Design documents include:

Site Plan and Elevation

General Arrangement Drawings

Boiler Building Drawings

Civil and Structural Drawings as required

Equipment Specifications

P&ID’s

Requests for Proposals on major equipment

Bid analysis for major equipment

Piping Drawings

Piping & Material Specifications

Pipe Hanger Schedules & Details

Insulation Specifications

Electrical One Line Drawings

Cable Tray and Conduit Routing Plans

Cable and Termination Schedules

Motor Schedule

Instrument List

Control Logic Drawings

Control Narratives and I/O Lists

Interface Drawings for Terminal Points

Procurement Specifications

Vendor Manuals

Spare Parts List

The Owner will review and comment on the design documents within 10 working days. The contractor will put in place a document management system to track documents and approvals that is accessible to the project team.

The Contractor will provide equipment information to the Owner in Microsoft

Excel format. The fields required are listed below:

Asset Number

General Plant Location

Description

Model

UNH MTR Rev B July 13, 2026 29

Manufacturer

Vendor Contact

Warranty Date

Purchase Date

Summary Level Technical Data (design and operating flows, pressures, temperatures, volts, power consumption, etc.)

Field Engineering Support

Field Engineering support will be provided for construction sequencing and equipment delivery, change control and technical support for field and design changes and commissioning and startup support.

The design drawings will be maintained through the project. Two sets of as-built record drawings will be provided at final completion. One copy of the record drawings in the current year of Revit, one copy in AutoCAD version 2025, and PDF format will be provided. The AutoCAD version shall not require any add-on programs to open, read, and print correctly. All XRef documents including borders and logos shall be provided.

Work documentation and drawing control will be maintained. Redline drawings will be maintained by the construction and engineering groups. Owner will have access to redlines to support O&M requirements. Following commercial operation, as-built record drawings will be provided to Owner in an electronic format (PDF).

Technical Documentation

The contractor will supply one complete set of electronic documentation and three complete sets of technical documentation for the equipment supplied by the contractor. The documentation will be indexed by equipment number.

Electronic documentation will be supplied in PDF format and indexed by equipment number. Physical documentation will be supplied in indexed binders.

Primary drawings will be 48”x36” with 1/8” lettering and dimensioning.

Startup & Commissioning

The commissioning of the facility will be in accordance with equipment supplier recommendations and industry practice. The intent is that the facility will be operated in parallel with the existing CHP plant.

Contractor shall supply sufficient personnel to conduct commissioning and startup. The Contractor shall ensure availability of factory-trained field technicians for start-up and commissioning of the boilers, feedwater system, UNH MTR Rev B July 13, 2026 30 makeup water treatment system, and diesel generator. A start up plan will be issued 30 days prior to the scheduled mechanical completion date. A commissioning plan will be issued 30 days prior to the start of commissioning.

Note: All Turnover packages will include initial vibration monitoring for rotating machinery.

The contractor will provide supervisors for the UNH operators under the direction of the contractor startup personnel during the commissioning until the system is accepted by UNH. The contractor shall perform all mechanical and electrical testing, and functional testing of all equipment to confirm that the equipment meets the design basis and operating criteria. Owner personnel or their designees may witness any or all tests conducted during startup and commissioning.

All equipment will be set, aligned, and checked in accordance with the manufacturer’s instructions. All first fills and consumables will be completed. All mechanical and electrical checks will be conducted. Pressure testing and flushing will be completed. All piping systems will be cleaned, flushed, or blown. At the completion of the mechanical testing, systems will be released for startup. At the completion of startup the systems will be released for commissioning, functional testing, and preoperational testing.

The contractor shall develop and have an approved Lock out/Tag out (LOTO) system in place. Specific lock out/tag out procedures will have been created and available prior to testing of equipment following UNH operating procedures. This system will be developed and handed off to the owner.

The contractor shall develop turnover packages for the Owner’s review. The turnover packages will document the system checkout including, calibrations, alignments, first fill dates and recommended service periods, drawing markups, spare part inventories, and initial vibration measurements. The turnover package will document when equipment started operating. Warranty information will be included in the turnover packages.

A punch list will be developed by the Owner before accepting system responsibility. On acceptance by the owner, the plant staff shall be responsible for operation of the equipment. Documentation of the commissioning and startup test activities and results will be provided to the Owner.

UNH MTR Rev B July 13, 2026 31

The contractor shall provide Facility documentation, including system and…