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< 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 CLAYVILLE PEAKING PLANT LOCATION: Vineland, NJ DESIGN START/COMPLETION: Spring 2014 – Spring 2015 SIZE & TECHNOLOGY: 64 MW Trent 60 Gas Turbine / Dilution Air SCR / Natural Gas Compression / Utility Sub-Station IN-SERVICE: Spring 2015 FIRM ROLE: Engineering Waldron was selected as the Engineer of Record for the design of a new peaking facility located adjacent to the Atlantic City Electric Clayville Substation in Vineland, NJ. With the success of the Waldron designed Howard Down Unit #11 project, Vineland Municipal Electric Utility chose to further increase capacity within their service territory. The option was exercised for the purchase of a second Trent 60, SC and natural gas compressor. Waldron developed a detailed design package around the Trent 60 engine and substation interconnection. In addition, Waldron supported VMEU in the selection and oversight of a general contractor to implement our design. The plant was in-service in the Fall of 2015.

< Back to all projects TUFTS UNIVERSITY COMMISSIONING LOCATION: Medford, MA SIZE & TECHNOLOGY: 4 MW Gas-fired recip. engine. 800-ton electric chiller 600-tons of hot water absorption chiller and pumps IN SERVICE: Winter 2018 FIRM ROLE: Owner’s Engineer Services, Cx Waldron Engineering was contracted to perform the commissioning services for the new Tufts Central Energy Plant. The plant consisted of a 4 MW gas-fired reciprocating engine, with 200 horsepower waste heat recovery boiler and 3x800 horsepower firetube boilers. The facility also included an 800-ton electric chiller and 600-ton hot water absorption chiller. Waldron, as the commissioning agent and systems trainer, coordinated new boiler/chiller plant startup while the existing plant was in operation, provided supplemental design and engineering during construction and commissioning, worked with vendors to correct equipment design oversight, and developed commissioning test procedures. The challenge of getting the new systems operational against the backdrop of a working plant required careful coordination, precise planning, and smooth execution of our commissioning plan. Tufts was able to get its system online and derive an economic benefit from its new cogeneration systems.

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

For thirty years, Waldron Engineering & Construction has delivered custom-engineered energy solutions to a diverse array of clients. From turnkey facilities to fresh insights that drive decision-making, we offer resilient, innovative and constructible solutions built to thrive in today’s dynamic utility landscape. Anchor 1 TERENCE WALDRON, P.E. CEO Terry attended Monsignor Bonner High School in the suburbs of Philadelphia. There he became a member of the school’s crew team, spending afternoons rowing on the Schuylkill River. Prompted by his thirst for technical knowledge and desire to advance his rowing, he went on to Columbia University in New York City. In 1982 he graduated from Columbia with a Bachelor of Science degree in Engineering Mechanics with a strong concentration in applied mathematics. During his tenure at Columbia he worked as an intern with Stone and Webster, joining the firm full time after graduation and working on the design of nuclear power plants. Foreseeing the decline of the nuclear power industry, he moved his talents to Boston and joined Chas. T. Main. At Main he was a mechanical engineer working in the industrial power group. While at Main he developed PC-based applications for performing heat balance and fluid flow modeling systems. Terry then founded Waldron Engineering when it became evident there was a need for highly skilled engineering services with responsive customer focus for the new independent power industry. For the last 28 years he has lead Waldron to become an industry leader in the CHP and private power industry. When not offering solutions to clients, Terry spends time with his wife and five children. He enjoys running, rowing, biking and devouring historical novels. But, a true geek at heart, he has the most fun developing ideas for new energy technologies – some of which will soon come to fruition. JOHN SWEET, P.E President John attended the University of Michigan and graduated with a Mechanical Engineering Degree. He then spent over 5 years in the U.S. Navy as a commissioned officer in the Nuclear Powered Surface Warfare community. In addition to other combat systems related assignments in the Navy, he was the electrical distribution officer on-board the USS Enterprise, a nuclear-powered aircraft carrier where he also was responsible for the supervision of the operation of a dual nuclear reactor plant complex. Shortly after leaving the Navy, he attended Boston College where he earned his MBA. John helped to launch Waldron in 1992. During his career at Waldron he has worked in various roles, from mechanical engineer to lead mechanical engineer as well as project management and corporate management responsibilities. He has been involved in power projects around the world from Indonesia and India to Peru and Honduras, as well as many in the U.S. He has been responsible for the management of the engineering, procurement and construction of several of Waldron’s largest Combined Heat and Power projects. He enjoys cycling, golfing, playing chess, and spending time with his wife and daughters at the beach near their home in Kennebunk, Maine. John Sweet David Forbes GRANT PAGE VP of Construction Grant earned a bachelor’s degree from Massachusetts Maritime Academy where he majored in Marine Engineering and minored in Plant and Facilities Engineering. He also received an MBA from Franklin Pierce University. Grant spent several years working at the Portsmouth Naval Shipyard as a maintenance and planning engineer. Grant went on to work in the industrial construction and public utility sector, building 20+ years of experience as an engineer, estimator, project manager, and safety officer. His expertise includes the development and execution of projects using Construction Manager at Risk; Design-Build; and Engineering, Procurement, and Construction (EPC) project delivery methods. Grant lives in southern New Hampshire where he enjoys spending time with his wife and two children. In the summer he can be found in the New Hampshire Lakes Region boating with family and friends. In the fall he can rarely be found, as he wanders into the woods… sometimes in blaze orange and sometimes in camouflage. MICHAEL MARK, P.E. VP of Engineering After a brief tenure in the mid-West, Michael landed in Alabama in time to join-up for the first grade, where as a transplant he struggled to put the sport of football in its appropriate context. This was rectified by his enrollment at Auburn University, where his formal education on the matter was completed. He participated in the Cooperative Education Program while at Auburn and worked for two years with Rheem Manufacturing in Montgomery, AL while completing his Mechanical Engineering Degree. After graduation Michael moved to Maine, bought a suit, and responded to an outdated job posting that confused everyone involved, but led to a part-time position at Waldron in 2000. The part-time aspect of his employment lasted for about a day, since which time Michael has progressed steadily within the company to his current position. He has worked on projects of all shapes and sizes, from studies to commissioning, including construction projects with steam turbines, power boilers, reciprocating engines and combustion turbines. Michael continues to live in Maine with his wife. He enjoys both reading and writing, with a smattering of his favorite novels being Cryptonomicon by Neal Stephenson, Mason & Dixon by Thomas Pynchon, and White Noise by Don DeLillo. As far as technical books go, The End of Certainty by Ilya Prigogine went down pretty well, as did The Rainbow and the Worm by Mae-Wan Ho. He grew up on a steady diet of Jim Kjelgaard stories. MICHAEL MARK, P.E. VP of Engineering After a brief tenure in the mid-West, Michael landed in Alabama in time to join-up for the first grade, where as a transplant he struggled to put the sport of football in its appropriate context. This was rectified by his enrollment at Auburn University, where his formal education on the matter was completed. He participated in the Cooperative Education Program while at Auburn and worked for two years with Rheem Manufacturing in Montgomery, AL while completing his Mechanical Engineering Degree. After graduation Michael moved to Maine, bought a suit, and responded to an outdated job posting that confused everyone involved, but led to a part-time position at Waldron in 2000. The part-time aspect of his employment lasted for about a day, since which time Michael has progressed steadily within the company to his current position. He has worked on projects of all shapes and sizes, from studies to commissioning, including construction projects with steam turbines, power boilers, reciprocating engines and combustion turbines. Michael continues to live in Maine with his wife. He enjoys both reading and writing, with a smattering of his favorite novels being Cryptonomicon by Neal Stephenson, Mason & Dixon by Thomas Pynchon, and White Noise by Don DeLillo. As far as technical books go, The End of Certainty by Ilya Prigogine went down pretty well, as did The Rainbow and the Worm by Mae-Wan Ho. He grew up on a steady diet of Jim Kjelgaard stories. Michael Mark

Energy projects today face the unprecedented challenge of balancing economic, functional, and environmental outcomes in the face of rapidly evolving regulatory and market conditions. Waldron’s industry-leading analytics provide the strategic insights necessary to make efficient investment decisions, track program performance over time, assess risk and track the key metrics most important to your organization. ANALYTICS Energy projects today face the unprecedented challenge of balancing economic, functional, and environmental outcomes in the face of rapidly evolving regulatory and market conditions. Waldron’s industry-leading analytics provide the strategic insights necessary to make efficient investment decisions, track program performance over time, assess risk and track the key metrics most important to your organization. DATA-DRIVEN RESULTS ENERGY MODELING TOOLS The cornerstone of Waldron’s analytical services is a proprietary, internally-developed software platform capable of performing integrated electrical, thermal, economic, and greenhouse gas emissions calculations for complex microgrid systems. Some basic features of the platform are the following: Utilizes equipment performance curve library enables accurate prediction of part-load performance of major electrical and thermal generation equipment. Incorporates electrical generation, solar PV, heat recovery, energy storage systems, centrifugal and absorption chilling, heat recovery chilling, heat pump technologies and other principal utility generation assets. Manages a portfolio of individual building loads that vary in time due to construction, demolition, energy efficiency retrofits, and demand-side management programs. Modifies the condition or performance of microgrid assets over time, such as time-varying fuel cell plant performance, combustion turbine degradation between overhauls, etc. Dispatches electric and thermal generation assets to concurrently meet electrical, steam, hot water and chilled water loads. Integrates multiple commodity supply cost futures, utility tariffs, and procurement strategies. Incorporates scheduled and unscheduled (randomly selected) maintenance periods and equipment availability profiles. Performs internal auxiliary load calculations for central energy plant and microgrid parasitic loads. Capable of incorporating and simultaneously dispatching multiple facilities on a common microgrid. STRATEGIC INSIGHTS Our array of in-house tools coupled with our experience in the design, construction and commissioning of energy generation and delivery systems enables us to offer true investment grade analysis. Our flexible tools allow rapid assessment of changes to market, regulatory or supply/demand conditions, so that existing assets are deployed optimally throughout their operating lifetimes. Determine optimal microgrid equipment configurations Efficiently identify key project drivers, sensitivities, and risks Track asset performance year-over-year compared to benchmark models Evaluate the true impact of Energy Conservation Measures (ECM’s) in a microgrid environment Identify the most cost-effective and environmentally sound dispatching strategies Determine the true cost of outages and equipment downtime Develop and/or analyze microgrid rate structures based upon calibrated system models Optimize returns on demand-side investments

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.

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< Back to all projects HARVARD BLACKSTONE – BOILER 11 UPGRADE DESIGN START/COMPLETION: November 2010 – June 2011 SIZE & TECHNOLOGY: 150,000 lb/hr dual fuel (natural gas and #6 oil), 400 psig steam boiler IN-SERVICE: November 2012 FIRM ROLE: EPC (Engineering, Procure, Construct), Commissioning In 2003, Harvard purchased the Blackstone Station in Cambridge, MA from NSTAR to insure a secure source of steam to serve the future campus expansion. Waldron was retained to provide technical due diligence for the purchase as well as develop a plan for Blackstone that would meet the Campus growth needs into 2020. The installation of Boiler 13 was the first step in the plan. After the successful installation of Boiler 13, the next step was the Boiler 11 upgrade. Waldron was once again brought on as the EPC contractor by Harvard University for the project. The project scope included an upgrade of the fuel delivery and control systems associated with Boiler 11 at Harvard’s Blackstone steam plant in Cambridge, MA. The proposed work involved a 150,000 lbs/hr dual fuel (natural gas and #6 oil), 400 psig steam boiler burner management and combustion control systems complete replacement. These upgrades modernized the fuel train and combustion controls for the industrial boiler which provides part of the Harvard campus steam supply.

< 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 UMASS POWER PLANT & DISTRIBUTION INFRASTRUCTURE SYSTEM STUDY LOCATION: Worcester, MA START: Fall 2018 COMPLETION: Spring 2019 FIRM ROLE: Engineering Consultant Waldron has been working on projects on the UMass Medical School Campus for over 20 years. The goal of this power plant and distribution infrastructure system study was to develop the most effective solution from a life cycle perspective to meet the evolving needs of the campus over the next 20—30 years. The three utilities that were studied included electric, steam and chilled water. As part of this project, Waldron performed an assessment of existing equipment and infrastructure, reviewed the current operating strategy, developed a conceptual upgrade to the campus metering scheme, and reviewed over twenty capital projects for their potential benefits to the system. For each of these capital projects Waldron conceptualized a project approach, calculated the life cycle outcomes for the campus using an 8,760-hr utility model, developed capital cost budgets for each, and also reviewed the level of urgency and environmental impacts of each. The project included hydraulic modeling of the steam and chilled water distribution systems, modeling of the electrical distribution system, and development of an 8,760-hr utility model with dispatch algorithms for the combustion turbine, three steam turbines, boilers and chillers within the UMMS facility. These models enabled investment grade accuracy for the life cycle cost analysis associated with each of the capital upgrades that were considered for the facility.

< 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.