Areas of Expertise: Ecological risk assessments (ERAs), human health risk assessments (HHRAs), site inspections, vapor intrusion modeling, toxicity testing, ecological services analysis (ESA), National Resource Damage Assessment (NRDA), Damage Assessment and Restoration Plans (DARPs)
Education/Certifications: Master of Science degree in Environmental Science and Bachelor of Science degree in Microbiology, Louisiana State University
Margaret is a senior consultant and expert risk assessor specialized in ecological and health-based assessments. She has implemented ecological risk assessments (ERAs) and human health risk assessments (HHRAs) under a variety of state and EPA programs, with emphasis on the Texas Risk Reduction Program (TRRP). Her experience with HHRAs ranges in complexity from preliminary assessments/site inspection (PA/SI) screening assessments to multi-media/multi receptor baseline assessments, including vapor intrusion (VI) modeling.
Margaret has worked extensively with EPA’s Superfund ERA Guidance, including field studies. She has experience in the use of site-specific tissue sampling, toxicity testing, and biouptake studies. She is well-versed in application of an Ecological Services Analysis (ESA) as a remedy under TRRP that leaves contaminants in place but provides ecological compensation. In addition, Margaret has experience with the Natural Resource Damage Assessment (NRDA) process with both state and federal trustees, including writing Damage Assessment and Restoration Plans (DARPs).
In addition, Margaret currently supports a KTL prime contract to perform pesticide ecological and human health risk assessments for the U.S. Forest Service.
Prior to her specialization in risk assessment, Margaret began her career developing a microbiology lab to support bioremediation projects. After five years in the lab, she moved into the risk assessment arena. She has been a reviewer for HHRAs and ERAs in EPA Region 5, and has conducted HHRA activities for the Bureau of Indian Affairs (BIA), and has supported Natural Resource Damage Assessment (NRDA) and ERA projects for companies including EnSafe Inc., Parsons, and INTERA.
Margaret is a member of the Society of Environmental Toxicology and Chemistry (SETAC) and Association for Environmental Health and Science (AEHS). She has her M.S. in Environmental Science and B.S. in Microbiology from Louisiana State University. Recent publications have included the following:
Roy, M. “Status of Ecological Risk Assessment in Texas: On-Line Tools for Project Planning, Assessment and Decision Making.” Presented at Texas Association of Environmental Professionals (TAEP) monthly meeting and presentation. Houston, Texas. November 16, 2017.
Champagne, L. (TCEQ), Roy, M. and J. Rogers (WTAMU). “Ecological Risk Assessment and Database: Restructured and in Review.” Presented at Texas Commission on Environmental Quality Environmental Trade Fair. May 2015.