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“It was night and day between ESC [Spectrum] engineers and the other company -- [the other company] didn’t even schedule a FAT (Factory Acceptance Test).”


“I couldn’t possibly think of using anything other than StackVision. It’s very clear that it is a very well-thought-out system.”


Pfizer Groton is a pharmaceutical research and development (R&D) facility located in Groton, Connecticut. The facility contains three boilers (NOx, CO, NH3 and H3) and one gas turbine (O2) and operates under 40 CFR Part 60 regulations. 

Jack Dunne (now retired) was the Senior Manager of Environmental and Subject Matter Expert for Air Compliance at the time of the project. He was responsible for analyzing emissions data from the systems and ensuring facility compliance.


  • Lack of Communication with Previous DAS Vendor During Implementation: The previous vendor did a poor job at communicating throughout the project, resulting in a significant misunderstanding of Pfizer Groton’s needs, faulty software and programming errors, and a lack of support.
  • Reliance on Spreadsheets with Data Inaccuracies: The DAS did not address evolving federal and state regulatory changes and more complex rules requiring additional calculations and timely responses for data requests.
  • Time-Consuming Production of Reports: The DAS was not able to process data fast enough to support critical decision-making regarding downtime, exceedances, rolling averages and other key compliance information.


After a difficult implementation process with a previous vendor, Pfizer Groton’s DAS system generated spreadsheets and reports slowly and often with errors, was not well-supported or configurable, and did not meet their overall compliance needs. Jack Dunne learned about ESC Spectrum’s StackVision via a recommendation by a third-party stack tester. Mr. Dunne knew ESC Spectrum was reputable in the emissions monitoring industry and decided to upgrade his current DAS to StackVision. 

A Smooth Implementation

From the start of the StackVision implementation process, Mr. Dunne knew he had made the right choice. ESC Spectrum provides a thorough implementation process for the StackVision software and data controllers to help customers meet their objectives for monitoring and reporting stack emissions. The Implementation team utilizes a phase-gate process to manage the execution of a project to ensure its success by requiring key project stakeholders to review and approve work as it is completed. 

The thorough implementation process used by ESC Spectrum starkly contrasted the clumsy implementation of Pfizer Groton’s previous DAS vendor. “It was night and day between ESC [Spectrum] engineers and the other company -- [the other company] didn’t even schedule a FAT (factory acceptance test)” he explained. “Virtually every person I have dealt with either on the phone or in person at ESC Spectrum, I have been very pleased with working with them as a person” noted Mr. Dunne. He appreciated the implementation engineer who organized an in-person meeting and walked him through all of the equations, processes and features of StackVision, ensuring the team had a good understanding of the DAS and its components.

He also highlighted the quality of assistance the ESC Spectrum Support team provided when the Pfizer Groton compliance team first attempted to use StackVision on their own after implementation. “They did an awesome job at getting system back on track after Pfizer tried to tinker with it,” he commented.

Data Stability & Efficiency

The use of StackVision eliminated the issue of missing data and significantly cut down reporting time at Pfizer Groton. Mr. Dunne was extremely pleased with StackVision’s quality and ease of use, emphasizing the logical and intuitive nature of the DAS. Previously, Mr. Dunne and his team spent weeks creating spreadsheets from a data dump to compare the fuel flow from the DAS and the distributed control system was reporting, look for differences, and manually conduct calculations to see discrepancies. If they were unable to justify the variances, the plant would simply deem the data “invalid” in downtime, resulting in hours and even days of lost, valuable data. With StackVision’s automatic calculations and comparisons, Mr. Dunne received information in minutes, not weeks. StackVision effectively reduced compliance liability issues from the Pfizer Groton plant.

StackVision also provided built-in functionality that Mr. Dunne used to review the DAS configurations using the StackStudio configuration tool. StackStudio is an easily navigable, logically organized, browser-based environment designed specifically to consolidate all editing tools into a single medium.

Major Improvements in Reporting Efficiency

Since adopting StackVision, the Pfizer Groton facility experienced a major improvement in their report efficiency.

Mr. Dunne was also able to understand how his data was derived through custom reports in CEMScape. CEMScape is a graphical network display of the parameters and configuration in the DAS and simplifies navigation and troubleshooting. 

Additional Benefits

StackVision also includes other benefits, such as remote use. Users are able to access the StackVision dashboard from virtually anywhere. “Remote access works very well -- whether I’m sitting in my office or sitting in my house, I can access the server and get everything I need. Producing the reports is quite simple,” explained Mr. Dunne.

The StackVision DAS is in continuous development and provides customers with updated features each quarter. Customers are backed by 24/7 expert customer support and training resources to make sure the software is running smoothly, and facilities remain in compliance.

Thanks to ESC Spectrum, Pfizer Groton is now able to monitor emissions efficiently and effectively from its facility, ensuring compliance with 40 CFR Part 60 regulations. “I couldn’t possibly think of using anything other than StackVision. It’s very clear that it is a very well-thought-out system” said Mr. Dunne.

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    Published: 4/6/2021 12:56:04 PM

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