Denise Jensen

Ms. Denise Jensen has served as Water Quality Specialist for the Winnebago Tribe of Nebraska for nine years. Her accomplishments include the preparation of the tribe’s Quality Assurance Project Plan for the Chemical Assessment of Surface Water, Fish Tissue and Sediments; the Quality Assurance Project Plan for the Physical and Biological Assessment of Surface Water; and the Quality Assurance Project Plan for Ground Water/Domestic Drinking Water Well Assessment. Ms. Jensen has established an extensive surface water monitoring program, generating physical, chemical and biological data; conducted fish tissue collection from several recreational fishing bodies and monitored individual domestic drinking water wells on the Winnebago Reservation. She was enlisted in the Army Reserves for 12 years and served in Desert Storm. Ms. Jensen has an associate degree in medical laboratory technology and a BS in biology.

Sarah Swenson
Toxics Release Inventory Program Division, Office of Information Analysis and Access, Office of Environmental Information

Sarah Swenson joined EPA in 2009 after receiving her B.A. in Environmental Studies from the University of Kansas and a M.S. in Environmental Science and Policy from George Mason University. She currently works at EPA Headquarters in the Office of Information Analysis and Access where she supports outreach and communication activities for the TRI Program. She also serves on the Stewardship Team of EPA’s Emerging Leaders Network, which provides networking and professional development opportunities for the emerging generation of EPA leadership.

Nancy W. Wentworth
Acting Deputy Director
Office of Information Analysis and Access (2841T) Office of Environmental Information

Mrs. Wentworth joined EPA in 1978 after receiving her B.S. in Civil Engineering from Tufts University and an M.Eng. from Penn State. Mrs. Wentworth is currently the Acting Deputy Office Director of the Office on Information Analysis and Access, with responsibility for overall management and leadership of resources and scientific and technical activities of the organization. Mrs. Wentworth has also served as the Director of the Environmental Analysis Division, which has responsibility for EPA’s Environmental Indicators Initiative and related components of EPA’s Report on the Environment, and provides technical/analytical support to a number of Agency programs, including the Toxics Release Inventory program for six years. Prior to that position, she worked in the Agency’s Quality program where she was the Director for 13 years. The Quality Staff is responsible for developing policies, procedures, and tools to support the Agency’s Quality System, overseeing implementation of the Quality System, and developing training material to support the program. She also worked in EPA’s national drinking water program.

Steve Witkin

Mr. Steve Witkin is the project officer for the TRI Explorer application out of the Environmental Analysis Branch (ASB) within the U. S. Environmental Protection Agency’s (EPA’s) Office of Environmental Information (OEI). Since the Toxics Release Inventory (TRI) data touches multiple disciplines, ASB includes staff with expertise in toxicology, public health, chemistry, statistics, and data analysis. Mr. Witkin has been with the EPA for 14 years. Prior to his federal government career, he had a short stint with the Maryland state government and spent more than 15 years in private industry as a mechanical engineer. His involvement with the TRJ program began in 1987 as part of the regulated community. Mr. Witkin believes in a natural balance between a product, a product’s environment and the user. A specialized activity of Mr. Witkin includes learning “what” TRI data is requested by observing TRI Explorer maintenance files.