John Richards, Ph.D., P.E., QSTI, President

Dr. Richards serves as president for Air Control Techniques, P.C. He is a chemical engineer with more than 46 years of experience in the diagnostic testing and performance optimization of fabric filters, wet scrubbers, cyclonic separators, and gas absorbers. He has conducted a number of pre-design and design oriented projects concerning particulate matter and VOC air pollution control systems. He has developed and patented photochemical systems for control of toxic organic compounds such as dioxin-furans.

Dr. Richards has extensive experience in ambient air quality monitoring and fugitive dust emission factors. He is co-developer of an ambient monitoring technique that adapts the EPA 40 CFR Part L method for PM2.5 monitoring to serve as a means to measure ambient respirable (PM4) crystalline silica. He has supervised numerous fenceline PM4 crystalline silica sampling programs at frac sand producing facilities and upwind-downwind PM10 and PM2.5 air quality studies at crushed stone and construction sand producing plants. He has supervised many PM10 and PM2.5 emission factor studies for crushers, screens, conveyor transfer points and industrial unpaved roads.

Dr. Richards has a B.S. in Chemical Engineering and Chemistry from Penn State and a Ph.D. from the University of North Carolina at Chapel Hill. He is a registered professional engineer in North Carolina, South Carolina, Virginia, New York, and Wisconsin

He has contributed to the development of Method 201A for PM10 and PM2.5 emission measurement. He is co-developer of the dry impinger method for condensable PM2.5 measurement. In 2010, the U.S. EPA promulgated this dry impinger method as the replacement for Method 202, which was subject to significant biases to higher-than-true values.

He has developed seven training courses for the EPA Air Pollution Training Institute concerning air pollution control equipment, inspection health and safety, and engineering calculations.

Dr. Richards has served as an expert witness in a number of cases in state and Federal court.

Todd Brozell, P.E, QSTI, Vice President

Mr. Brozell serves as vice-president of Air Control Techniques, P.C. He has twenty five years of air emission testing and ambient air monitoring field experience. Mr. Brozell specializes in PM2.5, PM10, and PM4 crystalline silica ambient air monitoring, PM2.5 and PM10 emissions factor testing, and test method development. He is co-developer of the PM4 crystalline silica sampling technique that has been used successfully in numerous studies at frac sand and construction sand producing facilities. He has also developed an innovative technique for capturing and quantifying fugitive dust emissions from crushers, screens, and conveyor transfer points.

He has previously served as a Project Director at Entropy, Inc. Mr. Brozell has a B.S. Degree in Electrical Engineering Technology from Penn State University and is a registered professional engineer in North Carolina and Pennsylvania. He has a Group 1 QSTI certificate.

Tom Holder, QSTI, Project Director

Mr. Holder is a chemist with more than thirty-five years of experience in air emissions testing and air pollution control engineering. Areas of specialty include emission testing quality assurance, specialized emission testing, and air pollution control equipment diagnostic testing.

He has previously served as the Director of Test Operations at Entropy, Inc. and as the Vice President of Envisage Environmental. He has a B.S. degree in Environmental Sciences and is a registered environmental professional.

David Goshaw, P.E., QSTI, Project Director

Mr. Goshaw has twenty years of experience in air pollution control engineering and air emission testing. He has a B.S. degree in Civil Engineering from Valparaiso University and is a registered professional engineer in North Carolina. Mr. Goshaw is a Qualified Individual (QSTI certified) for Manual Gas Volume Measurements and Isokinetic Particulate Sampling Methods and Gaseous Pollutants Instrumental Sampling Methods.

Mr. Goshaw specializes in FTIR, CEM, and raw material testing and analysis. Mr. Goshaw served as the project leader for the Air Control Techniques, P.C. team responsible for the development of a patented photochemical control system to destroy polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in industrial gas streams and was the principal developer of the state-of-the art raw material thermal system used to analyze raw feed components for potential emissions.

Jonas Gilbert, EIT, Chemical Engineer

Mr. Gilbert joined Air Control Techniques, P.C. in 2013 after graduating North Carolina State University with a Bachelorís in Chemical Engineering. He specializes in air emissions field testing, air pollution control equipment diagnostic testing, and ventilation system testing and optimization. He is managing the development of a new coarse particulate matter sampling method. He is also a registered visible emissions observer.

Dan Richards, Business Manager

Dan Richards joined Air Control Techniques, P.C. in 2010 after passing on his successful animal adoption business, AniMall, which he started and managed. He has a degree from the University of North Carolina at Chapel Hill and has taken business management courses at both Duke University and North Carolina State University. He is responsible for managing Air Control Techniques, P.C.ís health and safety programs, computer systems, and accounting systems.