As the largest privately-held stack testing company, GCI (Grace Consulting, Inc.) provides exceptional air sampling services to clients nationwide. Since 2000, our employee ranks have grown as well as our number of field technicians, large fleet of mobile monitor laboratories, QSTI Crew Chiefs and Project Managers. With offices in Ohio, Indiana, North Carolina, and Missouri, our crews are easily mobilized to any location.

Clients rely on our knowledge and familiarity to ensure a well-organized duct or stack testing program. Our team’s expertise includes the latest sampling techniques and technical advancements, and an extensive inventory of sampling equipment that enables us to perform tests at numerous locations simultaneously, while maintaining adequate backup equipment to prevent delays due to malfunction. Our NELAC accredited mobile monitor laboratories and experienced lab technicians offer onsite results as well.

GCI operates in compliance with the ASTM D7036-04 Standard Practice for Competence of Air Emissions Testing Bodies. GCI has been awarded as a STAC/A2LA Accredited AETB. We are currently one of a handful of firms in the nation who have completed this process.



Founder, Chairman Emeritus

Carl S. Vineyard, P.E., was the original founder of GCI (Grace Consulting, Inc). Carl got his start in stack testing with Burns & McDonnell in 1975 while attending Missouri University where he earned his Bachelor of Science (BS) degree in Mechanical Engineering from their Science & Technology school at Rolla in 1979. In 1983, he and a business partner left B&M and formed their own testing company, TSA (Total Source Analysis), settling in the town of Wellington near Cleveland, Ohio. The business grew to the point of catching the eyes of CT&E (Commercial Testing & Engineering) – a division of SGS (Societe Generale De Surveillance) – who acquired TSA in 1995 as a wholly-owned subsidiary. Carl continued to serve as TSA’s President, but also as CT&E’s Vice President of Engineering. In 2000, Carl and the majority of the crew chiefs and long-term testing employees left TSA/CT&E behind and formed GCI (Grace Consulting, Inc.), eventually returning the business to its previous prominent position as one of the Nation’s leading industrial air emissions testing companies. Carl has previously served as GCI’s President, CEO, Chairman, as well as V.P. of Quality Assurance, but currently consults with us as one of our Professional Engineers, licensed in Ohio, New York, and Texas.

Earning over 45-years of stack testing experience, Carl has gained the respect and admiration of the majority of his industry’s peers and customers. In 2007, he patented the multi-probe flow RATA program called Precision Flow©, utilizing the electronic flow measurement portions of Methods 2H and 2G, practically revolutionizing how flow is measured for many of GCI’s clients, reducing their overall pollutant measurements by as much as 8% in some cases. However, his proudest achievement may be the fact that he was able to work with his three children, Stephanie, Nathan, and Nick, who manage GCI’s Indianapolis (Plainfield), Indiana Field Office.


Scott Teague, QSTI

President, GCI

Tim Moody, QSTI

Vice-President, OH Operations Manager

Nathan Vineyard, QSTI

Vice-President, IN Operations Manager

Frank Whitt, QSTI

Vice-President, NC Operations

Michael Whitt, QSTI

Director of NC Operations

Stacy Sword

Director of Report Writing Team, Scheduling and OH Office Manager
Joe Tutak

Joe Tutak

Director of Sales and Marketing, Northeast Territory Manager

Darryl Christy, PE, QI

Director of Quality, Senior Sales Engineer, Proposal Manager

Melanie Bethea

Southeast Territory Account Manager

Simon Kamagantsev

Midwest Territory Account Manager


Ohio • 510 Dickson Street, Wellington, OH 44090
North Carolina • 1855 Sipe Road, Conover, NC 28613
Indiana • 684 Tower Road, Plainfield, IN 46168


510 Dickson Street, Wellington, OH 44090
North Carolina
1855 Sipe Road, Conover, NC 28613
684 Tower Road, Plainfield, IN 46168




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