< Back to all projects NASHUA WASTEWATER TREATMENT FACILITY LOCATION: Nashua, NH DESIGN START: November 2017 DESIGN COMPLETION: March 2018 IN-SERVICE: August 2020 SIZE & TECHNOLOGY: 2 x 225 kW Engine Anaerobic Digester Gas/Natural Gas Blend FIRM ROLE: Engineer, Permitting Support, Commissioning Waldron performed a detailed evaluation of the existing cogeneration building at the Nashua Wastewater Treatment Facility (NWTF). The evaluation included the existing piping, renewable gas production, the two boilers, heat exchangers, gas cleaning room, the exhaust gas flare, and gas hold tank feed system. Waldron provided a preliminary design report on findings and recommended solutions. The renewable gas firing option allowed considerable financial and environmental benefits. Waldron was the Engineer of Record, environmental and electricity utility permitting agent for the project. The project included the replacement of an existing 300 kW engine generator and associated auxiliary equipment with two 225 kW engine generators, gas blending system for easy startup and to maintain consistent fuel gas quality at the engines, associated heat exchangers, new control system, and new electrical switchgear which enables net metering at the facility. The new design benefited the wastewater facility with significant energy savings and increased the overall operating efficiency, flexibility, and redundancy.

< Back to all projects NATICK SOLDIER SYSTEMS CENTER LOCATION: Natick, MA STUDY DATE: May 2017 – July 2019 FIRM ROLE: Feasibility Study NAICS: 541330, 237130, 237120, 236220, 221112, 221117, 221118, 221121, 221122 Waldron performed a study on the behalf of Constellation to evaluate the installation of a CHP plant at the NSSC campus. The basis for the study was an hourly utility model that was developed from utility load and cost information supplied by NSSC. The objective of the project was to determine the optimal-sized prime mover, evaluate the financial performance of the project, and develop a cost estimate to construct and commission the facility. Waldron also evaluated the utility modifications and interface changes required to operate the facility electrically as a Microgrid with thermal distribution loops. The recommended configuration is proceeding as a third party paid ESPC project.

< Back to all projects BRIGHAM & WOMEN'S BATTERY ENERGY STORAGE SYSTEM LOCATION: Boston, MA DESIGN START: November 2018 DESIGN COMPLETION: December 2019 SIZE & TECHNOLOGY: 1 MW/660kW-Hr FIRM ROLE: Engineering, Construction Management and Commissioning The installation of a Battery Energy Storage System (BESS) at the Brigham & Women’s Hospital was executed as an EPC (Engineer-Procure-Construct) project. BWH was looking for resiliency and peak demand reduction for their campus. The new battery energy storage system supplements operation of the existing CHP system which included a 4 MW natural gas fired Caterpillar engine and waste heat recovery. The now Hybrid-CHP system will provide operational cost savings and in the event of a power outage, could supplement the emergency diesel engines to provide power to the hospital. The project was installed in association with the MA-DOER. Scope of work included: Engineering and Design Procurement Permitting Construction Commissioning Turn-over

< Back to all projects GENERADORA ELECTRICAL DEL NORTE LOCATION: Puerta Barrios, Guatemala SIZE & TECHNOLOGY: 5.8 MW Turbo Expander, Super Critical Propane, Cycle Evaporative Cooling DESIGN START: Fall 2012 IN SERVICE: Spring 2013 SCHEDULE: Construction Start Winter 2013, Construction Complete Summer 2013 FIRM ROLE: Engineering, Procurement Generadora Electrical Del Norte (Genor), a Guatemalan independent power producer, owned a 40 MW heavy fuel oil-fired reciprocating engine plant in Puerto Barrios, Guatemala. Recognizing the benefits of an improved plant heat rate, Genor under-took an analysis of ways to improve the output and efficiency of the Puerto Barrios facility. A number of options were analyzed to “combine cycle” the plant. The plant selected the Organic Rankine Cycle ORC-AT, as designed by Waldron. Waldron has an exclusive license agreement to design and construct the ORC-AT cycle. The cycle consists of a two-stage heat recovery system producing supercritical propane from exhaust waste heat. Energy in the propane is converted to shaft horsepower in a two-stage turbo expander coupled to a single generator via a common gearbox. Heat from exhausted propane is recuperated against propane prior to recycling to the superheater. Cooling for the cycle is via a bank of evaporative condensers. The plant will produce a net output of 4.0 MW for sale to the grid with the addition of no fuel input.

< Back to all projects NATIONAL INSTITUTES OF HEALTH LOCATION: Bethesda, MD STUDY DATE: May 2016 – April 2017 SIZE & TECHNOLOGY: Combustion Turbine, Chilled Water Storage, Electrical Distribution System FIRM ROLE: Feasibility Study NAICS: 541330, 237130, 237120, 236220, 221112, 221117, 221118, 221121, 221122 Waldron performed a comprehensive utility study for NIH to evaluate the possibility of expanding the existing utility plant. The campus is presently served by a nominal 23 MW cogeneration facility, which is located adjacent to an existing thermal plant consisting of 60,000 tons of nameplate chilled water production capacity, with both steam and electric motor driven chilling capabilities, and five boilers with a nameplate production capacity of 800 kpph. Waldron developed a model for the entire campus utilizing existing utility data, and taking into account infrastructure upgrade projects that were planned, but not yet implemented, including an upgrade to the existing combustion turbine, a modification to the campus electrical distribution system, and the introduction of approximately 8 million gallons of chilled water storage. As part of the analysis Waldron reviewed fuel supply opportunities with local utility, identified electrical switchgear upgrades that would be required to support a new cogeneration option, and analyzed multiple sizes and types of generation to identify the optimal technology and size for additional on-site power generation. As part of the analysis, Waldron reviewed air emission constraints on generator sizing as well.

< Back to all projects JAMAICA PRIVATE POWER COMPANY LOCATION: Rockford, Jamaica DESIGN START: 1993 IN-SERVICE: Commercial Operation, Q1 – 1998 SIZE & TECHNOLOGY: 64 MW Heavy Fuel Oil (HFO) Slow Speed Diesel Engines with Condensing Steam, Turbine Generator FIRM ROLE: Owner’s Engineer, Start-Up and Commissioning Waldron Engineering was engaged to develop a design concept and technical specification to enable the owner to solicit turnkey construction bids. Subsequent to the initial work, we were retained to start-up; commission and performance test this facility. Waldron acted as the Owner’s Engineer – involved in the project development phase and assisted the owner to develop an EPC RFP and EPC bid evaluation, along with reviewing contractor design and construction submittals. Waldron participated in the project design and construction meetings. In the start-up and commissioning phase Waldron assisted with the equipment start-up crew to start-up the major equipment, develop commissioning plans and performed system commissioning tasks. Waldron also developed the facility performance test protocol, analyzed performance test results and developed the final performance test report. The facility contains two MAN slow speed 30 MW reciprocating engines exhausting into two pressure forced circulation heat recovery steam generators and one 4 MW steam turbine.

Waldron’s most important asset is its people. Whether it’s working an outage, responding to an urgent request for support, managing critical project information, or gathering around a conference table to ensure each aspect of your project has been carefully considered, it’s our people who make the difference that we deliver. Our People Waldron’s most important asset is its people. Whether it’s working an outage, responding to an urgent request for s upport, managing critical project information, or gathering around a conference table to ensure each aspect of your project has been carefully considered, it’s our people who make the difference that we deliver. We’re proud to employ some of the energy industry’s top profes sio nals—people who are committed to ensuring each project is a success, and who have the knowledge and skills to accomplish the task. Our team brings extensive experience across each of the engineering and design disciplines we cover, and everyone in the organization shares a focus on delivering solutions to our clients. We believe in ongoing mentoring We believe in continuing education and training for our staff to stay up-to-date. Whether you are new to a role or looking to update your skills, we believe in constant education and cross-functional learning. We nurture a culture of caring Waldron provides industry leading benefits for our employees including healthcare and tuition reimbursement. We provide a hybrid working environment that embraces both a work from home aspect coupled with an in office work component that fosters flexibility, mentoring, learning and a shared understanding of Waldron’s culture and values. We encourage personal professional development along a career path that leads to professional registration as an engineer or other relevant credentials. New Hampshire’s seacoast is our home and our playground Our main office is located in an area of the New England Seacoast that could be called a 'Hidden Gem'. Many of our employees get together after the workday to mountain bike in trails adjacent to our office. Downtown Exeter, NH has a vibrant culture and community. Nearby Portsmouth, NH is a progressive and eclectic mix of stunning architecture with fantastic dining, shopping, and commercial experiences. Escape to the beach, only a 15-minute ride from our office. Natural beauty and adventures like snow skiing, water-skiing, mountain hiking, and rock climbing are a short drive to Northern New Hampshire, Maine, or Vermont. We make time for fun Waldron has a supportive work environment that thrives on taking time to connect. We frequently enjoy morning doughnuts, lunches catered by local food trucks, sunset cruises, and ax throwing.

Waldron delivers custom-tailored, full-service energy solutions for our clients. Our unique blend of talent, expertise, and innovation drives every service we offer. Services Waldron delivers custom-tailored, full-service energy solutions for our clients. Our unique blend of talent, expertise and innovation drives every service we offer. Multi-Discipline With structural, electrical, controls, and mechanical engineering in-house, Waldron delivers integrated, fully-coordinated designs that capture all key project elements. Vertically-Integrated Waldron’s experience is informed by active participation in every phase of an energy project’s life cycle, from initial development through construction to start-up and commissioning, including delivery of turnkey projects. Utility Grade Waldron’s design packages are detailed, coordinated, and comprehensive. We deliver a “utility grade” standard of care by conveying fully engineered system designs with the essential details required to construct your facility. Energy-Focused Energy generation, storage, and distribution projects are what we do. Because of this, each and every day on the job expands our market-leading expertise. Customer-Centric Waldron emphasizes pragmatic, proactive problem-solving on behalf of our clients. Flexibility, responsiveness, and transparent communications are hallmarks of our approach. Performance Guaranteed Given the opportunity, Waldron will deliver turnkey energy generation and distribution projects backed by performance guarantees. ANALYTICS Waldron’s suite of analytical tools has been developed specifically to explore the complex interactions of microgrid systems. We are adept at mapping the technological, financial, regulatory and environmental parameters that shape an energy project, and delivering the insights required to manage your future with confidence. LEARN MORE ENGINEERING Waldron has extensive experience in the engineering and design of energy generation and distribution systems. We excel at developing fully integrated design packages tailored to your needs, and steering them through construction. LEARN MORE CONSTRUCTION MANAGEMENT Waldron’s construction management team is focused solely on the construction of central energy facilities and utility distribution systems. We can provide the program management, pre-construction Services and construction management required to ensure your project is delivered on time and on budget. LEARN MORE COMMISSIONING Waldron’s startup, commissioning and performance testing expertise provides the bridge between construction and commercial operation. We have a proven track record in the development and successful execution of detailed commissioning plans for plants ranging from institutional central heating and cooling facilities to full-scale utility power stations. LEARN MORE

Waldron is a technology-driven company with the experience to execute projects that utilize the following: Hydrogen, Biomass, Organic Rankine Cycle, Renewable Natural Gas, Battery Energy Storage Systems, Microgrid, Solar, Heat Pumps, Hybrid CHP, Technologies Waldron is a technology driven company with the experience to execute projects that utilize the following: Hydrogen Generation storage and distribution of Hydrogen requires a special set of expertise to navigate the challenges of this renewable energy gas. We utilize our process design expertise developed executing many Hydrogen projects to optimize the project economics and apply our experience codes and regulations to secure a reliable, safe installation. Key Project: USPS Maryland Hydrogen Biomass After 30 years of working on Biomass projects, Waldron has developed an expertise that ensures accurate performance and economic modeling. We utilize technology solutions that bridge the fuel available to the customer’s energy needs. Our team has the practical know how to execute the design details that will yield project success. Key Project: Fraser Paper Biomass Organic Rankine Cycle (ORC) Process Waste Heat is the new energy gold to be mined as a source of renewable energy. Waldron’s advanced thermodynamic modeling will accurately determine the value of your existing waste stream. We work with packaged units utilizing commercial refrigerants to custom designs that utilize the range from supercritical CO2 to Iso Butane. Our implementation experience with advanced hydrocarbon cycles provides us with the expertise to turn your waste heat into an economic and environmental asset. Key Project: Generadora Electrical Del Norte (Genor ) Organic Rankine Cycle Renewable Natural Gas Organic Waste is now a fuel to be utilized in the new renewable energy space. Material that is typically composed or landfilled can now be converted to pipeline quality Renewable Natural Gas and utilized on site or injected into the natural gas system. Our experience with energy generation systems that utilize a range of gas compositions provides us with the unique capability to implement microgrids that utilize Anaerobic Digestion Renewable Natural Gas. Key Project: Nashua Wastewater Treatment Facility Anaerobic Digestion Battery Energy Storage Systems Battery Energy Storage Systems have matured into a commercially available mass-produced product. The application of the product to our customers systems and energy challenges is the key to success for BESS projects. Waldron can model the system for optimal economic benefit, install the controls to ensure that economic success, and install the system and auxiliaries that will ensure the safe operation. Key Project: MRMC Battery Energy Storage System Battery Energy Storage Systems Microgrid Thirty years ago, Waldron took the technology lead in the designing, building and commissioning microgrids and has never looked back. Our microgrids are powered by a range of technologies that provide positive economics, resiliency and sustainability solutions for our customers. We continue to advance our hybrid designs, responding to the ever-changing landscape for our clients. Key Project: Biogen CHP Microgrid Solar Solar As part of our approach to maximize the use of zero carbon sources of energy. Waldron integrates solar into our microgrids in our hybrid approach to develop solutions that provide minimal carbon impact for the energy needs of our clients. The integration of solar with other assets requires planning and process controls to deliver optimal economics. Key Project: Smith College Heat Pumps Waldron’s process modeling allows us to bridge the gap between heat available and the process needs of our clients. We utilize heat pumps to maximize the heat recovery potential for a site increasing the energy quality of waste streams to match the facilities consumption needs. Heat Pumps Hybrid CHP The emergence and commercialization of battery energy storage systems has created a new operational paradigm for combined heat and power facilities. Disconnecting the generation and consumption of electricity allows for the CHP facility to operate at optimal efficiency for the current and future conditions. Key Project: TWA Flight Center Hotel Energy Center Hybrid CHP Compressed Air Energy Storage Infrastructure exists throughout the North America for the storage of natural gas in natural occurring salt domes. These domes can be repurposed to store compressed air for energy storage. The process involves compressing air during peak generation of wind or solar energy and expanding it during periods when the renewable resource is unavailable. Key Project: Conoco Phillips Compressed Air Energy Storage Anchor 2

Waldron’s detailed engineering packages are fully-coordinated, comprehensive, and informed by the client’s needs. The key is to understand the stakeholder’s goals, and structure a set of plans and specifications that clearly communicate these goals to the contractors. In turn, the result is a well-defined, successful project. ENGINEERING Waldron’s detailed engineering packages are fully-coordinated, comprehensive, and informed by the client’s needs. The key is to understand the stakeholder’s goals, and structure a set of plans and specifications that clearly communicate these goals to the contractors. In turn, the result is a well-defined, successful project. OUR PROCESS Important steps in the engineering and design services process include: PROJECT DEVELOPMENT The project development process can be a tortuous path through a maze of regulatory, contractual and financial barriers. Navigating this gauntlet successfully requires knowledge of the ways in which facility performance, technical constraints, and regulatory obligations coincide. Our direct experience bringing energy facilities from concept to operation enables us to optimize the path for you without sacrificing key outcomes. DETAILED ENGINEERING & DESIGN Waldron’s detailed engineering and design process is an orchestrated flow of information that proceeds from a comprehensive understanding of stakeholder goals to a set of plans and specifications that is specific to the project’s needs. We take a “no more and no less than is needed” approach: our multi-discipline in-house coordination process emphasizes comprehensive drawing sets with little to no delegated design, while our specifications are pared down to those requirements both specific to and essential to the project. The result is a design package truly ready for bidding and construction, which minimizes change orders and project delays by providing the clear direction that is required for an efficient construction process. CONSTRUCTION ADMINISTRATION Every construction project presents unique challenges. The key to success is working proactively with the vendors and trade subcontractors to navigate those challenges in a timely and cost-effective manner on behalf of the Owner. Waldron emphasizes productive relationships with all stakeholders, and adopts a responsive, flexible approach to overcoming obstacles and keeping the project on track. Because the starting point is a comprehensive, fully-coordinated design, our teams have the ability to quickly identify the impacts of design decisions on all project disciplines and resolve field challenges practically and efficiently.

At Waldron, commissioning is a thoroughly mapped, step-by-step approach designed to explore the entire operating envelope of a facility and demonstrate the project’s key outcomes have been met. Because of our focused expertise in energy system engineering, we are able to remain constructively engaged throughout the process of testing, troubleshooting, and optimizing a facility’s performance. Projects BAYSTATE MEDICAL CENTER MICROGRID BRIGHAM & WOMEN’S HOSPITAL MICROGRID ERVING INDUSTRIES MICROGRID PROJECT FRITO-LAY MICROGRID HARVARD BLACKSTONE – BOILER 11 UPGRADE JAMAICA BROILERS LYONDELL BASELL MICROGRID MONTCLAIR STATE UNIVERSITY MICROGRID NATICK SOLDIER SYSTEMS CENTER NEWINGTON ENERGY PORTSMOUTH NAVAL SHIPYARD TWA FLIGHT CENTER HOTEL ENERGY CENTER BIOGEN MICROGRID CLAYVILLE PEAKING PLANT FAA – EMERGENCY GENERATOR PROJECTS GENERADORA ELECTRICAL DEL NORTE HARVARD BLACKSTONE – BOILER 13 JAMAICA PRIVATE POWER COMPANY MILFORD REGIONAL MEDICAL CENTER MICROGRID MRMC BATTERY ENERGY STORAGE SYSTEM NATIONAL AERONAUTICS & SPACE ADMINISTRATION ONE BRYANT PARK MICROGRID SIMMONS UNIVERSITY INFRASTRUCTURE IMPROVEMENT PROJECTS UMASS AMHERST BRIGHAM & WOMEN'S BATTERY ENERGY STORAGE SYSTEM COLUMBIA UNIVERSITY FRASER PAPER MILL/NEXFOR HANSCOM AIR FORCE BASE MICROGRID HOWARD M. DOWN GENERATING STATION LONGWOOD MEDICAL ENERGY COMPREHENSIVE STUDY MIT LINCOLN LABORATORY FEASIBILITY STUDY NASHUA WASTEWATER TREATMENT FACILITY NATIONAL INSTITUTES OF HEALTH P&G GILLETTE WORLD HEADQUARTERS CHP TUFTS UNIVERSITY COMMISSIONING

< Back to all projects UMASS AMHERST LOCATION: Amherst, MA START: Dec. 2017 COMPLETION: May 2018 FIRM ROLE: Engineer, Planner, Consultant Waldron Engineering & Construction, Inc. developed a comprehensive, 8,760-hr campus utility model that was used to evaluate various alternatives for adding steam production capacity to the existing Central Heating Plant. The model included existing high and low pressure steam generators, an existing combustion turbine with heat recovery, two backpressure steam turbines, three steam pressures, and multiple fuels, as well as various new technologies that were considered for addition. Tariff models for natural gas and grid electricity based on hourly equipment dispatch. Electric feeder loading was incorporated into the model, such that distribution constraints limited the electrical output of the generators, which enabled evaluation of savings associated with the infrastructure upgrade alternatives. The model was used to calculate the GHG emissions benefits/costs for various operational strategies being tested. The study incorporated assessments of financial/ environmental impact of batteries, additional renewable generation, and energy conservation measures on campus. The planning tool Waldron created, enabled an in-depth analysis of the financial and environmental outcomes associated with integrated various technologies into the UMass micro-grid. The model was used to explore the cost per unit of GHG reduction associated with various technology options, including building-integrated renewable technologies such as solar thermal, geothermal, and pellet-fuel biomass boilers.