Dr. DiGiulio is a senior research scientist with more than 37 years of experience working on contaminant fate and transport issues. During his 31 years with the U.S. Environmental Protection Agency, he conducted research on gas flow-based subsurface remediation, groundwater and soil-gas sampling methodology, gas permeability testing, intrusion of subsurface vapors into indoor air, and solute transport of contaminants in soil and groundwater. The focus of his current work is on understanding the impact from oil and gas development on surface and groundwater resources including that associated with handling and disposal of technologically enhanced naturally occurring radioactive material. He has conducted research on: the impact of hydraulic fracturing and impoundments used to store and dispose oil and gas waste on groundwater resources and water wells; methane migration to water wells; wellbore integrity; and impact to surface water and sediment from disposal of produced water. He has served as an expert witness in litigation relevant to oil and gas development, has testified before State oil and gas commissions on proposed regulation, and has testified before Congress on the impact of oil and gas development on water resources.
Robert Lawrence is the Center for a Livable Future Professor Emeritus, Professor Emeritus of Environmental Health and Engineering at the Johns Hopkins Bloomberg School of Public Health, and Professor Emeritus of Medicine at the Johns Hopkins School of Medicine.
A graduate of Harvard College and Harvard Medical School, Dr. Lawrence trained in internal medicine at the Massachusetts General Hospital. Following duty as an epidemic intelligence service officer, CDC, he joined the faculty of the University of North Carolina. From 1974 to 1991 he directed the Division of Primary Care at Harvard Medical School, and from 1991 to 1995 directed health sciences at the Rockefeller Foundation, overseeing grants to improve health in Asia, Africa, and Latin America. In 1996 Dr. Lawrence founded the Center for a Livable Future, an interdisciplinary group of faculty and staff who study the relationships between diet, food production systems, the environment, and human health.
Dr. Lawrence is a founding member of Physicians for Human Rights, which shared the Nobel Peace Prize in 1997, and has participated in human rights investigations in Chile, Czechoslovakia, Egypt, El Salvador, Guatemala, the Philippines, South Africa, and Kosovo.
In his 30+ years career, Mr. Lopez-Torrijos has culled from the scientific, technical, and regulatory fields the soundest, most economically efficient methods to monitor changes in surface water resources and implement best practices for their maintenance. He has worked with academic and regulatory leaders to improve flood risk determination and stormwater practices and has advanced the application of remote sensing observation and geospatial technologies to diagnose and resolve issues at industrial sites, residential neighborhoods, and infrastructure choke points. Functioning as either a team member or project management leader, Mr. Torrijos provides project planning, data collection, and information distribution capabilities and ground-truth reports to resolve flooding and stormwater issues at local and regional scales.
Mr. Sulkin is an environmental consultant with over 40 years of experience, primarily focusing on water quality. He has a Bachelor’s in Environmental Science from the University of Virginia, and Master’s in Environmental Engineering from Vanderbilt University. For about 14 years he worked for the Tennessee regulatory agency in wastewater and drinking water programs in field offices and headquarters. Responsibilities included inspections, enforcement coordination, and field research, in positions including assistant manager of a field office, special projects assistant to the director, and statewide chief of Enforcement and Compliance. Since leaving the agency he has been an independent consultant and expert witness in numerous states, primarily working on water-related issues for environmental groups, as well as individuals, government, business, and industry. Projects have involved citizen suits, NPDES permits, 404 permits and mitigation, landfills, coal ash, stormwater, TMDLs, PFAS, field studies, training, consultant on films, and testing of water, sediment and other media. He also works as field staff and technical consultant for PEER (Public Employees for Environmental Responsibility), and has worked as a special expert for EPA.