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Systems & Products



The primary goal of ESC is to become the dominant worldwide supplier of environmental air sampling equipment by setting and maintaining the highest standard of quality for reliable instrumentation and the highest standard of excellence in customer service in the industry.

ESC manufactures source testing equipment that is designed to fulfill the technical and operational requirements specified by the U.S. EPA in the Stationary Source Testing Methods.

We specialize in the design 
and manufacture of unique 
equipment and custom systems to fulfill special applications. Our designers, 
engineers, assembly technicians, metal fabricators, electrical technicians, and customer support professionals possess a unique commitment to excellence in providing quality equipment, reliable performance, competitive pricing and responsive service.


Our staff has extensive individual and combined experience in the environmental source sampling industry as well as the design and manufacturing of portable and reliable equipment and systems for source sampling professionals worldwide.

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Lewis Ballard, Ph.D., P.E., Director
Dr. Ballard received his Ph.D. in Electrical Engineering from Duke University. He also has a degree in Nuclear Engineering from North Carolina State University. As a scientist at Research Triangle Institute for fifteen years he conducted research in air pollution test instrumentation for EPA. In 1973 Dr. Ballard founded Nutech Corporation, which became the dominant supplier in the USA of EPA Method 5 related source sampling equipment and GC-MS related methods such as VOST, TO-I, TO-12, and TO-14. In early 1995 Dr. Ballard formed Environmental Supply Company along with eight associates who had worked together previously at Nutech.

David Hendricks, President
Mr. Hendricks has a Mechanical Engineering degree from North Carolina State University. He was brought to ESC as a founding member for his engineering, management and administrative skills. He was previously a project engineer in the nuclear program at Westinghouse and worked for NASA at Kennedy Space Center. He is committed to positioning the company for maximum responsiveness to provide innovative equipment design, inventory and service.

David Ballard, Manufacturing Manager
Mr. Ballard has worked for ESC since its inception. Prior to ESC, he was the manufacturing manager for Nutech Corporation for 8 years. With his manufacturing experience and resourceful design and problem-solving skills, ESC is able to rapidly respond with source sampling solutions to satisfy the requirements of almost any application encountered by our customers.

Chris Dale, Sales & Marketing Manager
Mr. Dale has worked with ESC since its inception. Prior to ESC he worked in sales and marketing for Nutech Corporation in marketing communications. Mr. Dale has extensive experience in manufacturing, technical sales and business administration. Mr. Dale will provide the highest quality customer service in the form of information, guidance and on-time delivery of quality equipment to satisfy the needs of source sampling professionals worldwide.


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Environmental Supply Company, Inc.
708 E. Club Blvd., Durham, North Carolina 27704-4506
(800) STACKS-5 (919) 956-9688 FAX: (919) 682-0333 email: esc@environsupply.com