Margaret Roy

Senior Consultant

Contact via Email

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; Diplomate, International Board of Environmental Risk Assessors (IBERA)

Margaret is a Senior Consultant and expert risk assessor who specializes in conducting ecological and health-based risk assessments ranging from screening level to complex baseline assessments. Margaret applies her experience to help clients design sampling plans, identify technical data gaps, and develop overall project strategy. She also has experience with the Natural Resource Damage Assessment (NRDA) process, including writing Damage Assessment and Restoration Plans (DARPs).

Highlights of Margaret’s project work at KTL include the following:

• Managing the review of updated toxicological data to incorporate into updated Human Health and Ecological Risk Assessments (HHERAs) for the U.S. Department of Agriculture (USDA) Forest Service (FS).
• Providing technical support for revising the FS risk assessment tool.
• Facilitating the revision of the FS’s Operational Risk Management program to identify and manage risk for all resources (i.e., people, equipment, ecological systems, and cost).
• Serving as Project Manager for a Class I railroad’s lease site assessment program, including managing approximately 30 sites for identifying and managing environmental liabilities.
• Providing technical support to the U.S. Agency for International Development (USAID), including developing country profiles summarizing environmental and occupational health and safety policies.

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. Over her career, she has implemented ecological risk assessments (ERAs) and human health risk assessments (HHRAs) under a variety of state and EPA programs.

Relevant HHRA experience includes the following:

• Human Health Risk Assessor for polyfluoroalkyl substances (PFAS) contamination at the Marine Corps Air Station in Yuma, Arizona.
• Human Health Risk Assessor for PCBs in soil at the San Carlos Irrigation Project Maintenance Yard PCB Site in Coolidge, Arizona for the Bureau of Indian Affairs (BIA); worked directly with EPA on the use of representative statistics for exposure.
• Human Health Risk Assessor supporting the five-year review process for Treasure Island, California; to support the Explanation of Differences (ESD), developed risk addenda specific to arsenic and chlorinated volatile organic compounds (cVOCs) in groundwater.
• Human Health Risk Assessor for Edwards Air Force Base Operable Unit (OU) 05/10, California; revised risk assessments for seven sites to support the feasibility study.
• Human Health Risk Assessor for the former Weldon Spring Ordinance Works, OU 1 Soils and Pipeline ESD; updated the risk-based remedial goals for polycyclic aromatic hydrocarbons (PAHs), PCBs, explosives, and lead.
• Human Health and Ecological Risk Assessor for the cVOC site at the Former Wurtsmith Air Force Base in Oscoda, Michigan; assessment addressed cVOC discharge to a nearby recreationally used marsh, as well as traditional vapor intrusion.

Relevant ERA experience includes the following:

• Ecological Risk Assessor supporting EPA for the Colorado Smelter Superfund Site in Pueblo, Colorado; developed the screening-level environmental risk assessment (SLERA) and baseline environmental risk assessment (BERA) work plan.
• Ecological Risk Assessor for Abandoned Mineral Lands Sites at the Death Valley National Park for the National Parks Service (NPS); projects included participating in the incremental sampling (ISM) at numerous sites.
• Ecological Risk Assessor for the former Tronox/Kerr-McGee Wood Treating Facility in Texarkana, Texas; developed the SLERA and NRDA documentation.
• Ecological Risk Assessment Support to Texas Commission on Environmental Quality (TCEQ); facilitated and authored revision of TCEQ’s ERA program.
• Ecological and Human Health Risk Assessor, Tenaha Wood Treating State Superfund Site in Shelby County, Texas; worked with benthic invertebrate and fish tissue data to estimate risk for a local resident and ecological receptors.
• Ecological Risk Assessor for the U.S. Oil Recovery Superfund Site OU 1 and 2 in Pasadena, Texas; completed the SLERAs for both OUs, including riparian areas and Vince Bayou aquatic systems.

Margaret has further used her background in health risk assessment to provide third-party reviews for the EPA, as well as to develop a series of training workshops on environmental risk assessment, vapor intrusion assessments, and environmental statistics.

Margaret is a Diplomate in the International Board of Environmental Risk Assessors (IBERA), as well as a member of the Society of Environmental Toxicology and Chemistry (SETAC) and Association for Environmental Health and Science (AEHS). She is also an applicant for membership to the National Roster of Environmental Conflict Resolution Professionals. Margaret has her M.S. in Environmental Science and B.S. in Microbiology from Louisiana State University in Baton Rouge, Louisiana.