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< Back to all projects YALE UNIVERSITY INVESTMENT GRADE STUDY LOCATION: New Haven, CT STUDY DATE: November 2011 FIRM ROLE: Investment Grade Study for Repowering the Central Utility Plant Waldron was selected by Yale University to develop a master plan for the repowering of the existing Central Utility Plant. The existing facility consists of three 5 MW gas turbines and heat recovery boilers that provide steam and electricity to the campus. The turbines are now at the end of their useful life. Waldron’s scope included the development of a Basis of Design document that quantified the future requirements for the Central Utility Plant. The requirements comprised thermal and electric load profiles, operational restraints, environmental requirements, and economic parameters. An operations model of the existing Central Utility Plant was developed to simulate the hourly operations of the plant serving the campus loads for a 20-year period, BAU case (Business as Usual). A series of alternatives were developed and run against the 20-year simulation to quantify the technical performance of the options operating against the campus loads. An economic model of the operations is linked to the simulation, taking into account utility rate structures, commodity costs, and other influences. The combined models provided a data set that was utilized for the selection of a preferred option to be refined in to an investment grade business case. The investment grade business case included a detailed construction cost estimate, linked to a construction plan, including rigging analysis and a phasing-in schedule. Detailed operating cost results were included from the 20-year simulation. Operations costs and maintenance costs were developed down to the individual staffing level, consumable consumptions, and LTSA quotations. A final set of project economics along with a probabilistic analysis was developed for presentation for the business case to the trustees.

About Waldron specializes in engineering, construction, commissioning and testing of utility plants, peaking plants, combined heat and power, renewable energy, central heating and chilling facilities. ​ As a premier power engineering and construction management firm in the US, Waldron prides itself on being a leader in advancing new and emerging energy production technologies and developing ways to bring them to commercial application. ​ Whether you need engineering design, construction management, commissioning, or a full service EPC firm that can take a project from initial concept to final operation, we can partner with you to deliver the best solutions on time and on budget. ​ Our reputation and exemplary skill set is well respected within the energy–focused community, and we would be delighted to share our references with you. LEADERSHIP OUR PEOPLE HISTORY

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

< Back to all projects JAMAICA BROILERS LOCATION: Spring Garden, Jamaica IN-SERVICE: 2002 SIZE & TECHNOLOGY: 15 MW Heavy Oiled Fired Reciprocating Engine FIRM ROLE: Owner’s Engineer Waldron Engineering was engaged to develop a design concept for a cogeneration plant at a food processing facility. The plant size was 15,300 KW with 50,000 lbs/hr of steam generation. The prime movers for this project are multiple #6 oil fired Wartsilla reciprocating engines exhausting into a single heat recovery steam generator, a dual fuel package boiler and a hot water absorption chiller. Waldron Engineering oversaw the letting of the EPC contract and the commissioning of the plant systems as the Owner’s Independent Engineer.

< Back to all projects UNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL LOCATION: Worcester, MA DESIGN START: Winter 2010 DESIGN COMPLETION: Winter 2011 SIZE & TECHNOLOGY: 7.5 MW Electric, 60,000 lb/hr Steam, 4,000 ton Electric Chiller, Dual Fuel Combustion Turbine FIRM ROLE: Engineering, Construction Management, Technical Support and Commissioning The University of Massachusetts Medical School (UMMS) in Worcester is a large medical hospital, research center, and medical school campus. Due to continuing campus expansion, their existing cogeneration facility could not meet capacity. Energy efficiency and reliability were key concerns in developing plant options. Waldron Engineering was selected to do the engineering and design of the UMMS cogeneration plant expansion. The cogeneration plant expansion included a 7.5 MW dual fuel combustion turbine, a fired HRSG rated at 60,000 lb/hr, 1100 psig and 850ºF, a new natural gas compressor, a new 4000 TR electrical chiller and a new plant master electrical control system with intelligent load shedding scheme that greatly enhanced the overall electrical system reliability. The new cogeneration system boosted the overall efficiency from 55% to over 70%, exceeding expectations. The project scope included: building structural design electrical design—included interconnection between the existing generators and the new electrical system to shape a complete load shedding scheme mechanical design— included high pressure steam system connecting with the existing steam system new HP natural gas system modified an existing 80,000 gal no. 6 fuel oil system to no.2 fuel oil system.

< Back to all projects P&G GILLETTE WORLD HEADQUARTERS CHP LOCATION: Boston, MA DESIGN START: Winter 2009 DESIGN COMPLETION: Summer 2010 SIZE & TECHNOLOGY: 7.5 MW Taurus 70 with HRSG & SCR FIRM ROLE: Engineering, Procure, Construction Management and Commissioning IN-SERVICE: Summer 2011 Waldron was selected by P&G Gillette to expand their existing power plant by installing a new combined heat and power plant in a location that was occupied by an existing boiler. A multi-level plant design was developed with the prime mover selected as the 7.5 MW Solar Taurus 70 gas turbine that exhausted through a 100kph Rentech HRSG. Waldron was also awarded the construction management (CM) and procurement contract for the plant installation. Except for the turbine, gas compressor, and HRSG; Waldron supplied all plant auxiliary equipment and subcontracts to execute the plant installation. The CM scope included site work, soil remediation, driven piles, concrete foundations, demolition of existing plant interferences and boiler, abatement, structural steel installation, major & auxiliary equipment installation, piping & insulation, aqueous ammonia tank, fire suppression, fire alarm, architectural finishes, electrical distribution, and instrumentation and controls. In addition, Waldron performed the start-up & commissioning of the plant. Throughout the project there was continued added scope due to unforeseen conditions with an expectation of zero changes to the schedule. Waldron also had changing utility interconnect requirements which led to impacts on the design. In addition, Waldron successfully navigated Boston permitting changes during the certification of occupancy process. Waldron’s work on Gillette proved to be very challenging. After many curveballs, we met those challenges successfully. For example, Waldron had to perform the demolition and erect structural steel inside the operating plant—a plant that could not have any unplanned outages. We also had to be creative in planning and executing construction operations during severe weather conditions in order to make a large cut in the existing building envelope during the winter months in Boston. Existing sensitive equipment and systems installed in the construction path had to be protected from construction activities. As a scheduling challenge, Waldron had to coordinate weekend fire alarm testing and the permit closeout process between the vendors, the subcontractors, the Boston Fire Department and P&G – which in and of itself is no small task. It is worthy to remember that the plant had to stay operational at all times to support the manufacturing of P&G Gillette products. Waldron and our subcontractors planned and worked many major holiday weekends to suit the few plant planned outage schedules. Waldron worked closely with the client and building owner during the commissioning process to overcome impacts to the newly installed equipment from utility harmonics.

< 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.