Miranda Henning, BCES

Managing Principal, Business Director - Health and Ecology

M.E.M., Water and Air Resources, Duke University, Durham, North Carolina, 1991

B.A., Environmental Science, Wesleyan University, Middleton, Connecticut, 1987

Certified Senior Ecologist, Ecological Society of America, 2020

Board Certified Environmental Scientist, American Academy of Environmental Engineers and Scientists, 2022

Hazardous Waste Operations and Emergency Response 40-Hour Certification (1988–present)

Society of Environmental Toxicology and Chemistry

Ecological Society of America

Miranda Henning, BCES

Managing Principal, Business Director - Health and Ecology (207) 800-3812 Portland, ME mhenning@integral-corp.com

Miranda Henning helps clients in the regulated, legal, governmental, and nonprofit communities quantify and mitigate the risks and damages posed by chemicals in the environment, home, workplace, diet, and consumer products. A certified senior ecologist and Board Certified Environmental Scientist (BCES, ecotoxicology), she provides expert testimony, conducts technical analyses, offers strategic advice, and shares findings and recommendations with diverse audiences. Ms. Henning has developed and applied innovative techniques to characterize and mitigate the effects of releases of per- and polyfluoroalkyl substances (PFAS), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), PCBs, PAHs, petroleum hydrocarbons, pesticides, and metals. Her work often takes the form of human health and ecological risk assessments, natural resource damage assessments (NRDAs), public meetings, safety assessments, feasibility studies, and expert reports. Ms. Henning has contributed to nearly 100 guidance documents, scientific publications, and technical presentations.

Contaminated Sediments
Natural Resource Damage Assessment
Litigation Support
PFAS/Emerging Contaminants
Risk Assessment
Metals Toxicology and Assessment
Radiological Risk Assessment
Risk Communication
Training
Toxicology
Product Stewardship
Planning and Permitting
Feasibility Studies
Mining
Environmental Decision-Making
Expert Testimony

Contaminated Sediments

Natural Resource Damage Defense Services, Maine Supported a cooperative assessment and settlement of damages related to historical industrial activities adjacent to a river that led to sediments contaminated with metals. Evaluated baseline conditions, natural resources potentially impacted, methods for quantifying injury, and candidate restoration projects.

Evaluation of 20 Years of Sediment Data, Casco Bay, Maine Directed statistical, geospatial, and risk- related evaluation of a long-term sediment monitoring database for Casco Bay, Maine. Described spatial and temporal trends and compared the results with sediment quality benchmarks and findings for the broader Gulf of Maine.

Ecological Risk Assessment, Eastport, Maine Prepared a baseline ecological risk assessment (ERA) of chemical exposures to aquatic receptors in a bay that is adjacent to a former chemical manufacturing facility in Eastport, Maine. Chemicals of concern included PCBs, PAHs, and mercury and other metals. Oversaw extensive field sampling program targeting sediment, macroinvertebrates, and fish. Quantified risk to marine algae, benthic and aquatic invertebrates, fish, mink, harbor seals, spotted sandpipers, and harlequin ducks.

Risk Support Services, Housatonic River, Pittsfield, Massachusetts Provided risk support services at the Housatonic River PCB site in Massachusetts. Completed ecological field studies on fish and piscivorous wildlife, risk assessment work plans, short-term measures risk assessments, imminent hazard risk assessments, and Monte Carlo analyses of potential human exposure. Developed risk-based cleanup goals, developed white papers on risk-related subjects, and completed key components of a comprehensive ERA.

Ecological Risk Assessment, Nashua River, Leominster, Massachusetts Directed an HHRA and prepared an ERA under the Massachusetts Contingency Plan for a reach of the Nashua River that is impacted by PCBs, PCDD/Fs, PAHs, and metals.

Ecological Risk Assessment, Bridgeport, Connecticut Characterized the nature and extent of metals, PCBs, and PAHs in three brooks and a pond located on a historical industrial property. Designed a phased field sampling program targeting sediment, invertebrates, and fish to support the ERA and characterization to support remedy evaluation and design. Directed the team’s compilation of data into a unified database and geographic information system. Used multiple lines of evidence to quantify risks posed to invertebrates, fish, and wildlife.

Corrective Measures Proposal, Bridgeport, Connecticut Prepared a corrective measures proposal under RCRA to evaluate and select the preferred approach to sediment remediation within a 5-acre pond impacted by metals, PCBs, and PAHs. Developed detailed estimate of the costs to implement all alternatives considered and worked with peer reviewers to refine those costs. Worked with outside counsel to define expedited permitting timeline. Dredging was selected as the preferred alternative.

Natural Resource Damage Defense Services, New York Supported a cooperative assessment and settlement of damages related to historical releases of PCBs, PAHs, and metals to a large northeastern urban river. Evaluated baseline conditions, natural resources potentially impacted, and candidate restoration projects.

Sediment Remediation Cost Estimating in Support of Corporate Acquisition, New York To support a private equity investor’s acquisition of a firm with potential sediment liability, directed the analysis of sediment chemistry data for more than 10 miles of a river, estimation of sediment cleanup goals based on precedent, defined theoretical cap areas and dredge prisms for various remediation alternatives, and developed minimum, most likely, and maximum costs to remediate contaminated sediment using combinations of MNR, enhanced MNR, armored capping, and dredging for different reaches of the river. Defined plausible schedule for expenditures under multiple scenarios. Analysis enabled the buyer to acquire insurance and close the deal.

Natural Resource Damage Litigation Support Services, New Jersey Supporting a responsible party in its defense against natural resource damage (NRD) allegations related to a SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Delaware Supporting a responsible party in its defense against NRD allegations related an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Maryland Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, East Coast Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Pennsylvania Supported a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Defense Services, Brunswick, Georgia Supported the cooperative assessment and settlement of NRDs related to historical releases of PCBs, PAHs, mercury, and lead to an 800-acre saltwater marsh in coastal Georgia. Directed habitat equivalency analyses for multiple ecological receptors, identified candidate compensatory restoration projects, and negotiated with state and federal trustees.

Ecological Risk Assessment, Columbus, Mississippi Prepared a baseline ERA for a creek and river downgradient of a former wood treatment facility. Quantified risks to invertebrates, fish, birds, and mammals posed by numerous chemicals of concern.

Consulting Expert, Louisiana Supporting a responsible party in pending litigation related to allocation of responsibility for historical releases to a Louisiana waterbody.

Feasibility Study for Devil's Swamp Superfund Site, Baton Rouge, Louisiana Prepared a feasibility study for PCB-impacted sediment within a constructed lake in the floodplain of the Mississippi River. Defined remedial action objectives, remediation goals, remedial technologies, and remedial alternatives. Evaluated and compared remedial alternatives based on NCP criteria and oversaw detailed estimation of costs to implement each alternative. Identified the preferred alternative as a combination of armored capping within a drainage ditch and enhanced MNR. Reviewed and commented on EPA’s proposed plan and record of decision.

Natural Resource Damage Litigation Support Services, Midwest Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Human Health Risk Assessments, Middletown, Ohio Prepared multiple HHRAs for a steel manufacturing facility where PCBs, metals, and PAHs were present in onsite soils and sediment and in biota in an offsite creek. Designed and executed a survey of human use of the creek.

Natural Resource Damage Defense Services, Ohio Supported the cooperative assessment and settlement of NRDs related to historical releases of metals to a creek. Identified and evaluated multiple compensatory restoration projects.

Natural Resource Damage Defense Services, Michigan Supported the cooperative assessment settlement of NRDs related to historical releases of PCDD/Fs to a river. Identified and designed multiple compensatory restoration projects.

Remedial Investigation/Feasibility Study for Orphan Site within the Detroit River Area of Concern, Michigan Represented a nonfederal partner in the investigation of an orphan site under the Great Lakes Legacy Act. Under this voluntary cost-sharing program, directed work in concert with EPA and its contractors to characterize contaminated sediment within a portion of the Detroit River Area of Concern (AOC) that otherwise would not have been evaluated. Directed field sampling to support the remedial investigation and reviewed EPA’s work in preparing the remedial investigation report. Directed the preparation of the feasibility study, including definition of remedial action objectives, remediation goals, remedial technologies, and remedial alternatives. Evaluated and compared the remedial alternatives based on the National Contingency Plan (NCP) criteria and oversaw the detailed estimation of costs to implement all alternatives. Met and negotiated with EPA and its contractors to reach agreement on the preferred alternatives, which was a combination of MNR and dredging with backfilling.

Ecological Risk Assessment, Indiana Harbor, Indiana Prepared an ERA for a former coke plant property adjacent to Indiana Harbor. Chemicals of concern include VOCs, SVOCs, and metals in groundwater that discharges into the harbor. Quantified exposure and risks to aquatic invertebrates, fish, and piscivorous birds and mammals. Refined the assessment and demonstrated that current conditions are unlikely to adversely affect those ecological receptors.

Human Health and Ecological Risk Support Services, Noblesville, Indiana Over three decades, managed human health and ecological risk strategy for addressing PCBs in soil, sediment, and fish tissue associated with historical operations at a former tire manufacturing facility. Originally completed an HHRA and an ERA in 1996, which provided the basis for remediation-focused sediment excavation, and monitored natural recovery in the downgradient creek. Subsequently directed the assessment of risks posed by PCBs in soils of the creek’s floodplain, a portion of which lies in residential backyards and a portion of which is undeveloped bottomland forest habitat. Updated the long-term monitoring program for the creek to evaluate trends in concentrations of PCBs in fish following the remedial action, directed the monitoring, and demonstrated the scientific basis for no further action.

Technical Support for Litigation, Wisconsin Supported Joseph Rodricks, Ph.D., in preparation of his expert report for Appleton Papers, Inc. and NRC Corporation v. George Whiting Paper Co. et al., July 10, 2009.

Ecological Risk Analyses at a Former Manufactured Gas Plant Site, Milwaukee, Wisconsin Peer-reviewed diverse aspects of ecological risk from PAHs in lake sediments adjacent to a former manufactured gas plant.

Natural Resource Damage Defense Services, Washington Supporting a federal agency that is a responsible party at a former mine site where state, tribal, and federal trustees allege physical and chemical injury to a creek and a lake as a result of historical mining activities.

Ecological Study Design at a Mine Site, Alaska Peer reviewed a study plan prepared by a non-governmental organization that was intended to differentiate mine-related and background sources of lead to an embayment.

Human Health and Ecological Risk Assessments, Deloro Mine Site, Deloro, Ontario, Canada At an abandoned mine and metals refinery site, directed a baseline HHRA and ERA to support the Government of Ontario’s remediation decisions related to cleanup goals and the areal extent requiring remediation. Collected site-specific data to support testing of sediment toxicity, surveys of benthic community structure, and determination of chemical concentrations in sediment, surface water, floodplain soil, and tissue of invertebrates and fish.

Human Health and Ecological Risk Assessment, Peninsula Harbour Area of Concern, Marathon, Ontario, Canada On behalf of Environment and Climate Change Canada (ECCC), prepared an HHRA and an ERA on the effects of mercury and PCBs in sediment and aquatic biota within the Peninsula Harbour Area of Concern (AOC). Developed the conceptual site model and selected valued ecological components, assessment endpoints, and measurement endpoints. Assessed risks, calculated target fish tissue concentrations, developed sediment management goals, and estimated area and volume of sediment warranting management. Designed and managed a field survey of mink and river otter habitat quality as well as a survey of fishing behavior and consumption practices among residents of Marathon and the Pic River Tribe. Led four public consultation meetings with residents and municipal leaders of Marathon, the Pic River Tribal Council, and tribe members.

Ecological Risk Assessment for Mercury-Contaminated Sediment in the St. Clair River Area of Concern, Sarnia, Ontario, Canada On behalf of ECCC, developed and applied a decision-making framework to inform future sediment management decisions at the St. Clair River AOC, where mercury is the primary chemical of concern. Constructed a decision-making matrix to identify and prioritize areas within the AOC where sediment remediation is warranted. Geospatial modeling was used to evaluate and analyze the spatial and temporal coverage of four lines of evidence: sediment chemistry, benthic community structure, toxicity, and the potential for biomagnification.

Ecological Risk Assessment, Wheatley Harbour Area of Concern, Wheatley, Ontario, Canada On behalf of ECCC, prepared a targeted ERA focused on the effects of PCBs on piscivorous fish, mammals, and birds that inhabit the Muddy Creek wetland within the Wheatley Harbour AOC (Lake Erie). Estimated exposure to wildlife based on measured fish tissue concentrations and by employing a bioaccumulation food-web model to estimate uptake from sediment. Modeled dietary doses and mink tissue residue concentrations for comparison with literature-derived toxicity reference values and the effect concentration of 10 and 20 percent of the study population from the dose-response curve. Finally, calculated risk-based concentrations of PCBs in fish tissue and sediment based on protection of piscivorous fish and wildlife.

Conceptual Site Model, St. Marys River Area of Concern, Sault Ste. Marie, Ontario, Canada Prepared and updated a conceptual site model for contaminated sediment at the St. Marys River AOC, where PAHs and oil are the primary chemicals of concern. Oversaw a literature review of sediment quality guidelines for total petroleum hydrocarbons. In consultation with stakeholders, offered recommendations for further study and source identification.

Conceptual Site Model for St. Lawrence River Area of Concern, Cornwall, Ontario, Canada To support ECCC’s delisting decisions for the St. Lawrence River AOC, directed an extensive literature review and the development of a conceptual site model for a reach of the St. Lawrence River near Cornwall, Ontario, where mercury-impacted sediment is currently undergoing MNR. Developed recommendations for target sediment concentrations and long-term monitoring to determine success, as well as the timeline for achieving these goals.

Sediment Management Options Analysis, St. Clair River Area of Concern, Sarnia, Ontario, Canada Evaluated and compared options for managing mercury-contaminated sediments at the St. Clair River AOC. Constructed a decision-making matrix to identify and prioritize areas within the AOC where sediment remediation was warranted. Evaluated remedial alternatives in terms of their cost, implementability, and effectiveness; also assessed the environmental impacts of implementing the remedies, monitoring requirements for demonstrating remedy success, and regulatory requirements for implementation.

Sediment Management Options Analysis, Ottawa River, Ontario, Canada Oversaw and advised in the identification of candidate remediation options for mercury- and radionuclide-contaminated sediment within a reach of the Ottawa River. Defined criteria for screening remediation options, and comprehensively evaluated and estimated costs for each remediation option.

Sediment Management Options Analysis, Peninsula Harbour Area of Concern, Marathon, Ontario, Canada Evaluated sediment remediation options, including the screening options, based on cost, effectiveness, and feasibility. Prepared the conceptual engineering design for three preferred options, and estimated remedy pricing.

Guidance Development for Sampling Sediment, Surface Water, and Biota, Canada On behalf of the Canadian Council of Ministers of Environment, developed guidance for sampling sediment, surface water, and biota in support of a risk assessment.

Ecological Risk Assessment, Alpine Lake, Italy Prepared an ERA for an alpine riverine and lacustrine site impacted by mercury and DDT. The scope of the ERA spanned fate and transport modeling, bioavailability assessment, sediment quality triad use, a sediment profile imaging survey, and food-web modeling as well as a comprehensive literature review of the toxicity of methylmercury and DDT to different ecological receptors.

Literature Search on Beneficial Use of Contaminated Sediments Directed the completion of a comprehensive literature search and critical examination of treatment technologies employed for beneficial use of contaminated sediments.

Natural Resource Damage Assessment

Natural Resource Damage Litigation Support Services, Delaware Supporting a responsible party in its defense against NRD allegations related an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Maryland Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, East Coast Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Pennsylvania Supported a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Midwest Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Defense Services, Ohio Supporting a responsible party in its defense against NRD and in allocation of responsibility for historical releases of chemicals to land.

Natural Resource Damage Defense Services, New Mexico Supporting an energy company in negotiations with the State of New Mexico related to alleged natural resource injuries associated with historical releases of an SVOC.

Natural Resource Damage Litigation Support Services, New Jersey Supported a responsible party in its defense against NRD allegations due to historical releases of PFAS to soil, groundwater, sediment, and surface water.

Natural Resource Damage Defense Services, Maine Supported a cooperative assessment and settlement of NRDs related to historical releases of VOCs to groundwater and discharge into surface water. Identified suite of restoration projects that led to rapid settlement of the case.

Natural Resource Damage Defense Services, Maine Supported multiple PRPs with negotiations with the state trustee and the preparation of a cooperative NRDA related to releases from a historical landfill and leaching of VOCs to groundwater. Quantified injury and identified candidate restoration projects.

Evaluation of the Technical Basis for a Natural Resource Damage Settlement, New Jersey On behalf of the New Jersey state legislature, evaluated key reports underpinning one of the largest NRD settlements in the state of New Jersey and advised on the appropriateness of the proposed settlement.

Web-Based Information Management System for Baseline Information, Gulf of Mexico, U.S. Directed the development of a web-based information management system that compiled, evaluated, and facilitated access to publicly available data, reports, articles, and geospatial information related to baseline ecological and human use services provided within the Gulf of Mexico.

Natural Resource Damage Defense Services, Wisconsin Employed a settlement comparison approach and habitat equivalency analysis to evaluate potential liability resulting from historical releases of an emerging contaminant to soil, groundwater, and surface water.

Evaluation of Ecosystem Services under the Environmental Liabilities Directive, Italy Used a net environmental benefit analysis to estimate environmental liabilities resulting from historical releases from a metal ore processing facility in Italy. Established conservative service loss thresholds based on risk-based human health and ecological screening values, scaled potential injuries according to habitat preferences of local biological resources, and calculated potential damages using habitat equivalency analysis. Calculated potential costs to implement sufficient compensatory restoration projects for offsetting the estimated liabilities.

Portfolio Liability Assessments In support of multiple business transactions, conducted comprehensive records reviews to estimate ranges of potential liabilities related to an NRD.

Pellston Workshop: The Nexus between Ecological Risk Assessment and Natural Resource Damage Assessment Acted as an invited participant in the Pellston workshop on the nexus between ERA and natural resource damage assessment. Coauthored manuscript reflecting the deliberations at the workshop.

Litigation Support

Natural Resource Damage Litigation Support Services, Delaware Supporting a responsible party in its defense against NRD allegations related an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Maryland Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, East Coast Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Litigation Support Services, Pennsylvania Supported a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Consulting Expert, Louisiana Supporting a responsible party in pending litigation related to allocation of responsibility for historical releases to a Louisiana waterbody.

Natural Resource Damage Litigation Support Services, Midwest Supporting a responsible party in its defense against NRD allegations related to an SVOC in sediment and biota.

Natural Resource Damage Defense Services, Ohio Supporting a responsible party in its defense against NRD and in allocation of responsibility for historical releases of chemicals to land.

Testifying Expert Witness, Connecticut Retained by Babst Calland to represent client in cost recovery litigation under CERCLA for a site primarily impacted by PCBs. Prepared expert report and rebuttal report. Testified in deposition. Case settled favorably.

Technical Support for Litigation, Windham, Maine Developed lines of evidence to demonstrate that client's contributions to PCB contamination were de minimis.

Technical Support for Litigation, New York Supported Robert H. Harris, Ph.D., in preparation of his expert report for the U.S. Bankruptcy Court for the Southern District of New York In re: Solutia Inc. Case No. 03-17949 (PCB); Official Committee of Equity Security Holders of Solutia Inc. v. Monsanto Company and Pharmacia Corporation, Adv. Proc. No. 05-01202 (PCB).

Expert Report under Canada’s Environmental Protection Act and Ontario Water Resources Act, Ontario, Canada On behalf of the Ontario Ministry of the Environment, Conservation and Parks provided sworn affidavit for the Environmental Review Tribunal concerning an appeal by Tembec Industries related to releases of PCBs to an Ontario waterbody.

PFAS/Emerging Contaminants

Guest Editor, Special Journal Issue on Ecological Risks Posed by PFAS Invited guest editor of special issue of Integrated Environmental Assessment and Management. Identified U.S. and international scientists researching the topic of ecological risk posed by PFAS, solicited and reviewed their submissions, and authored manuscript reflecting their collective findings.

Screening-Level Ecological Risk Assessment for PFAS, Massachusetts Directed the preparation of a screening-level assessment of ecological risks posed by PFAS in surface water, sediment, and aquatic biota.

PFAS Conceptual Site Model, New Jersey Directed the preparation of a conceptual site model for PFAS historically released at an industrial site, characterizing release mechanisms, affected environmental media, migration and transformation pathways, fate, receptors, and exposure routes.

Integral’s Monthly PFAS Updates, Portland, Maine Conducts senior technical review of subscription-based newsletter that summarizes all peer-reviewed publications on PFAS published in the prior month.

Regulatory Toxicology for PFAS Directing the preparation of technical comments on state, federal, and international proposals related to the regulation of PFAS.

Regulatory Support for PFAS Supporting a medical equipment manufacturer in identifying state and federal PFAS-related reporting requirements.

Regulatory Support for PFAS Supporting a manufacturer of industrial equipment in answering customer questions related to PFAS reporting.

Regulatory Support for PFAS Supported a vehicle manufacturer in responding to a state’s PFAS-related regulatory requirements.

Risk Assessment

Baseline Risk Assessment at a Former Manufactured Gas Plant Site, Chicago, Illinois Led a team that prepared a streamlined HHRA and ERA for an urban site with multiple landowners and diverse uses and exposure pathways.

Risk Support Services for a Munitions Manufacturer, Saco, Maine Prepared human health risk assessments (HHRAs) and ERAs at a munitions manufacturing facility in Saco, Maine, where volatile organic compounds (VOCs) were the main chemicals of concern. Quantified risks to ecological receptors in an offsite creek and woodland. Developed and updated site-specific risk-based media protection standards. Prepared a groundwater corrective measures study (CMS) supporting modification of the previously approved remedy to allow rapid final closure of the site.

Human Health and Ecological Risk Assessment, Long Island, Maine On behalf of the State of Maine, prepared human health and ecological risk analyses related to the impacts of petroleum hydrocarbons at a former Navy installation on Long Island in Casco Bay. Advised on sampling needs, estimated risks, prepared a report, and presented findings at two public meetings.

Human Health Risk Assessments, Cape Cod, Massachusetts Under a federal government contract, prepared HHRAs for 12 study areas at the Massachusetts Military Reservation in Cape Cod, Massachusetts. Estimated potential risks associated with soils and groundwater impacted by metals, pesticides, and semivolatile organic compounds (SVOCs). Evaluated occupational, residential, and recreational scenarios to determine the need for further investigation or remediation.

Human Health Risk Assessment, Great Neck, New York Prepared an HHRA on an aquifer impacted by VOCs. Modeled concentrations of VOCs in air and vegetables. Developed risk-based concentrations of VOCs in groundwater that would trigger air monitoring.

Ecological Risk Services, Navassa, North Carolina Directed the preparation of technical memoranda and ecological risk assessments at several operable units affected by PAHs and PCDD/Fs.

Peer Review of Risk Assessment, Devil's Swamp Superfund Site, Baton Rouge Parish, Louisiana Peer-reviewed the HHRA and ERA for the Devil’s Swamp Lake Superfund Site, which is located within a backwater of the Mississippi River and has sediment impacted by PCBs. Identified improvements to inputs and methods that yielded more accurate risk estimates and strengthened the documentation for those inputs and methods.

Target Mercury Concentrations for Fouling Communities on Offshore Oil and Gas Platforms, Texas To support decommissioning decision-making, modeled food web transfer of mercury from fouling communities to fish to fish-eating birds and recreational anglers. Estimated mercury concentrations in the tissues of fouling communities that were not expected to affect higher trophic level receptors adversely and identified the maximum acceptable concentration overall.

Guidance Development for Risk Characterization, Massachusetts Participated in three work groups convened by Massachusetts Department of Environmental Protection to develop guidance for conducting environmental risk characterization under the Massachusetts Contingency Plan. Attended meetings and conference calls to discuss strategy, approaches, and specific guidance. Helped develop a screening approach to characterize terrestrial systems and weight-of-evidence methodology.

Metals Toxicology and Assessment

Literature Review on Ecotoxicity of Mercury Directed a detailed critical review of the peer-reviewed scientific literature on the ecotoxicity of mercury to benthic invertebrates, fish, birds, and mammals, culminating in the publication of three manuscripts in peer-reviewed scientific journals.

Radiological Risk Assessment

Produced Water Study, Louisiana Directed industry-wide study of the effects on human health and the environment of produced water discharges by oil and gas production wells in the territorial seas of Louisiana; the study was prepared as a condition of permitting by the Louisiana Department of Environmental Quality. Oversaw two seasons of sampling of produced water, sediment, surface water, macroinvertebrates, and fish; modeling of the mixing zone; and testing of sediment toxicity, as well as data management, analysis and mapping; statistical testing; ERA; and HHRA.

Risk Communication

Public Consultation for St. Lawrence River, Cornwall, Ontario, Canada Represented ECCC at a series of public meetings with the local community, First Nations, and the Binational Public Advisory Council concerning the conceptual site model for mercury-contaminated sediment within the AOC and future recommended actions.

Public Meeting for Long Island Fuel Farm, Maine On behalf of the State of Maine, presented at a public meeting on Long Island, Maine, concerning risk findings associated with the former fuel farm.

Public Meetings for Housatonic River Polychlorinated Biphenyl Site, Pittsfield, Massachusetts Represented client at multiple public meetings concerning ecological risks posed by PCBs in sediment and floodplain soil in the Housatonic River.

Public Meetings for LCP Site, Brunswick, Georgia Represented a client at multiple large and small public meetings concerning sediment remediation options for the LCP Superfund Site in Brunswick, Georgia.

Public Consultation for Peninsula Harbour Area of Concern, Marathon, Ontario, Canada Represented ECCC at four public meetings with residents of Marathon, Ontario, city officials, the Pic River First Nation chief and council, and the Pic River First Nation concerning contaminated sediment management options for Peninsula Harbour, an embayment of Lake Superior.

Public Consultation for St. Marys River, Sault Ste. Marie, Ontario, Canada Represented ECCC at a series of public meetings with the local community, First Nations, and the Binational Public Advisory Council concerning the conceptual site model for contaminated sediment within the AOC and future recommended actions.

Training

Training on Causality Assessment, U.S. Taught a web-based course on the assessment of causality in ecological risk.

Guidance Development and Training for Causality Assessment, Canada On behalf of Fisheries and Oceans Canada, wrote a guidance module on the assessment of causality in an ERA to support Canada’s Federal Contaminated Sites Action Plan. Developed and led training on the guidance module.

Ecological Risk Assessment Training, Canada On behalf of ECCC, designed, prepared, and taught 2-day workshops held in nine cities across Canada. The workshops focused on reviewing ERAs under the Federal Contaminated Sites Action Plan.

Toxicology

Regulatory Toxicology for PFAS Directing the preparation of technical comments on state, federal, and international proposals related to the regulation of PFAS.

Literature Review on Ecotoxicity of Polychlorinated Biphenyls Directed a detailed critical review of the peer-reviewed scientific literature on the ecotoxicity of PCBs to benthic invertebrates, fish, birds, and mammals.

Environmental Safety Profiles for Three Topical Antimicrobial Compounds Directed the development of environmental safety profiles for three compounds used in personal care products through identification of relevant data on the compounds’ ecotoxicology, environmental fate, use, and environmental monitoring; development of screening-level ERAs for each compound; identification of knowledge and data gaps pertinent to the environmental safety narrative; and development of a plan to fill data gaps. Helped prepared a manuscript for submission to a peer-reviewed journal, as well as posters for presentation at the annual conference of the Society of Environmental Toxicology and Chemistry.

Product Stewardship

Literature Review on the Environmental Fate of Polymers Directed the completion of a literature review focused on the empirical and mechanistic tools for predicting the environmental fate and transport of polymers.

Environmental Safety Justification to Support New Drug Application Directed the assessment of potential environmental impact of the introduction of a new therapeutic option for a rare childhood disease, proposed for registration in the U.S. and the European Union. While FDA accepted the justification to forego a comprehensive environmental risk assessment, the European Medicines Agency is requiring additional study.

Web-Based Environmental Safety Assessment Directed the development of a framework and automated web-based assessment tool to allow rapid tiered assessment of the environmental safety of hundreds of ingredients used in personal care products.

Web-Based Human and Environmental Safety Assessment Directed the refinement of an automated web-based assessment tool to allow rapid tiered assessment of consumer and environmental safety of hundreds of ingredients used in cleaning products.

Regulatory Support for PFAS Supporting a medical equipment manufacturer in identifying state and federal PFAS-related reporting requirements.

Regulatory Support for PFAS Supporting a manufacturer of industrial equipment in answering customer questions related to PFAS reporting.

Regulatory Support for PFAS Supported a vehicle manufacturer in responding to a state’s PFAS-related regulatory requirements.

Petition to Delist Ethylene Glycol Monobutyl Ether from the Hazardous Air Pollutants List, U.S. On behalf of the American Chemistry Council, prepared a petition to EPA’s Office of Air Quality Planning and Standards to delist ethylene glycol monobutyl ether (EGBE) from the Clean Air Act Section 112 list of hazardous air pollutants. Evaluated human and ecological toxicity of the compound, developed a nationwide emissions inventory for more than 3,000 sources of the chemical, implemented a tiered emissions modeling approach to quantify ambient concentrations of EGBE at the fence line of each source, estimated risks to human health and the environment associated with current and future ambient concentrations in the air and surface water, and prepared the petition. The petition was approved by EPA, and EGBE has been removed from the hazardous air pollutants list.

Petition to Delist Ethylene Glycol Monobutyl Ether from the Toxics Release Inventory, U.S. On behalf of a trade group, prepared a petition to EPA’s Toxics Release Inventory Program division to delist EGBE from the Toxics Release Inventory. Evaluated human and ecological toxicity of the compound, developed a nationwide emissions inventory for more than 2,000 sources of EGBE, implemented a tiered emissions modeling approach to quantify ambient concentrations of EGBE at the fence line of each source, estimated risks to human health and the environment associated with current and future ambient levels in the air and surface water, and prepared the petition.

Planning and Permitting

Total Maximum Daily Load and Water Quality Criteria Support, Delaware River Provided technical support to a consortium of companies and municipalities affected by the Delaware River Basin Commission’s definitions of water quality criteria for PCBs, modeling of fate and transport of PCBs, and requirements for total maximum daily loads under the Clean Water Act.

Feasibility Studies

Groundwater Corrective Measures Study, Saco, Maine Prepared a CMS for groundwater impacted by VOCs. More than 25 years after the site’s original CMS recommended implementation of a barrier well system, this study updated the corrective measure objectives, media protection standards and points of compliance, and corrective measure alternatives. Enhanced anaerobic dechlorination with groundwater recirculation, combined with confirmation monitoring and institutional controls, was identified as the preferred alternative. The Maine Department of Environmental Protection accepted the updated CMS and revised corrective measure with no substantive comments.

Remedial Alternatives Analysis, Rockaway Township, New Jersey Evaluated the risks to ecological receptors posed by various remedial alternatives at an operating industrial facility that borders the Rockaway River. Characterized the value of the habitat that would be affected by the proposed remedial actions, assessed injury that would result from these alternatives, and discussed uncertainty of regaining lost values after implementation of the alternatives. Developed a range of preliminary remediation goals for PCBs in surface soil, based on protection of the American woodcock.

Corrective Measures Proposal for a PCB-Impacted Floodplain, Noblesville, Indiana Negotiated with EPA Region 5 to employ risk-based remediation in residential backyards within the floodplain of a creek impacted by PCBs. Participated in meetings with homeowners regarding their preferred remediation plans and documented successful completion of the remedial activities. Prepared a corrective measures proposal for the undeveloped portion of the floodplain, which identified habitat enhancement and MNR as the preferred alternative. Following EPA’s approval of the preferred remedy, directed the preparation of a habitat enhancement plan and implementation of that remedy. Oversaw post-remediation monitoring of the creek and the undeveloped floodplain.

Mining

Environmental Decision-Making

Expert Testimony

Miranda Henning is a well-rounded and complete technical consultant. Miranda’s work is not only well-supported but innovative and thoughtful. She is thorough and attentive to detail, always mindful of project goals and objectives, and especially skilled in articulating and communicating complex technical matters simply and effectively to varied stakeholders. She is one of the most reliable and capable technical experts with whom I have worked.
– Anne J. Crochet, Partner, Taylor Porter

Henning, M. 2024. Big changes to Maine’s reporting requirements and PFAS phase-out. JDSupra. June 3. https://www.jdsupra.com/legalnews/big-changes-to-maine-s-reporting-5738787.

Henning, M., and H. Lynch. 2024. The U.S. releases a moonshot research and development strategy for PFAS. JDSupra. September 6. https://www.jdsupra.com/legalnews/the-u-s-releases-a-moonshot-research-4026777.

Frankel, A., and M. Henning. 2024. EPA releases final drinking water standards for PFAS chemicals. JDSupra. April 11. https://www.jdsupra.com/legalnews/epa-releases-final-drinking-water-6772449.

Henning, M., and M. Welsch. 2023. Opportunities for meaningful environmental justice actions by the regulated sector. JDSupra. July 12. https://www.jdsupra.com/legalnews/opportunities-for-meaningful-9693652.

Gwinn, P., and M. Henning. 2023. Maine’s PFAS regulations—important dates are coming. JDSupra. April 18. https://www.jdsupra.com/legalnews/maine-s-pfas-regulations-important-3686658.

Frankel, A., and M. Henning. 2023. EPA proposes the first national primary drinking water regulations for any PFAS chemical. JDSupra. March 14. https://www.jdsupra.com/legalnews/epa-proposes-the-first-national-primary-2794523.

Henning, M., M. Welsch, and X. Santiago. 2023. Expert Analysis: Enviro justice can help cos. with regulators, communities. Law360, New York, NY. March 9. https://www.law360.com/articles/1583250/enviro-justice-can-help-cos-with-regulators-communities.

Fuchsman, P., K. Fetters, A. O’Connor, M. Bock, M. Henning, L. Brown, I. Mrdjen, and K. Stanton. 2022. Ecological risk analysis for benzalkonium chloride, benzethonium chloride, and chloroxylenol in US disinfecting and sanitizing products. Environ. Toxicol. Chem. 41(12):3095–3115.

Fuchsman, P., K. Fetters, A. O’Connor, M. Bock, M. Henning, L. Brown, I. Mrdjen, and K. Stanton. 2022. Supplemental information: Ecological risk analysis for benzalkonium chloride, benzethonium chloride, and chloroxylenol in U.S. Disinfecting and Sanitizing Products. https://www.scienceopen.com/document_file/72bc1779-5826-4283-a675-003991492056/PubMedCentral/72bc1779-5826-4283-a675-003991492056.pdf.

Henning, M. 2022. Compendium of state regulatory activities on environmental justice. JDSupra. October 17. https://www.jdsupra.com/legalnews/compendium-of-state-regulatory-4799382.

Albano, S., and M. Henning. 2022. Environmental racism, environmental justice, and how civil engineers can help. Civil Source, ASCE Utah Section Newsletter. 3(2).

Henning, M.H., and P.C. Fuchsman. 2021. Ecological risk assessment of per- and polyfluorinated alkyl substances: Foreword. Integr. Environ. Assess. Manage. 17(4):670–672.

Fuchsman, P.C., M.H. Henning, L.E. Brown, M.J. Bock, and V.S. Magar. 2017. Toxicity reference values for methylmercury effects on avian reproduction: Critical review and analysis. Environ. Toxicol. Chem. 36:294–319. [Received 2017 Exceptional Paper Award from Environmental Toxicology & Chemistry.]

Fuchsman, P.C., M.H. Henning, M.T. Sorensen, L.E. Brown, M.J. Bock, C.D. Beals, J.L. Lyndall, and V.S. Magar. 2016. Critical perspectives on mercury toxicity reference values for protection of fish. Environ. Toxicol. Chem. 35:529–549.

Fuchsman, P., M. Henning, and V. Magar. 2016. Comment on “Exposure to mercury and Aroclor 1268 congeners in least terns (Sternula antillarum) in coastal Georgia, USA” by G.L. Robinson, G.L. Mills, A.H. Lindell, S.H. Schweitzer, and S.M. Hernandez, Environmental Science: Processes & Impacts, 2015, 17:1424. Environmental Science: Processes & Impacts 18:289–291.

Canadian Council of Ministers of the Environment. 2016. Guidance Manual for Environmental Site Characterization in Support of Environmental and Human Health Risk Assessment. PN 1551. ISBN 978-1-77202-026-7 PDF. https://www.ccme.ca/en/files/Resources/csm/Volume%201- Guidance%20Manual-Environmental%20Site%20Characterization_e%20PN%201551.pdf. French translation available at https://ccme.ca/fr/res/guidancemanual-environmentalsitecharacterization_vol1_fpn1552.pdf.

Conder, J.M., P.C. Fuchsman, M.M. Grover, V.S. Magar, and M.H. Henning. 2015. Critical review of mercury sediment quality values for protection of benthic invertebrates. Environ. Toxicol. Chem. 34:6–21.

Government of Canada. 2013. Federal Contaminated Sites Action Plan (FCSAP): FCSAP Supplemental Guidance for Ecological Risk Assessment, Module 4: Causality Assessment Module, Determining the Causes of Impairment at Contaminated Sites: Are Observed Effects Due to Exposure to Site-Related Chemical or Due to Other Stressors? March. https://www.canada.ca/content/dam/eccc/migration/fcs-scf/B15E990A-C0A8-4780-9124-07650F3A68EA/13-049-ERA_Module-204-ENG.pdf

Gala, W., J. Lipton, P. Cernera, T. Ginn, R. Haddad, M. Henning, K. Jahn, W. Landis, E. Mancini, J. Nichols, J. Pederson, and V. Peters. 2009. Ecological risk assessment (ERA) and natural resource damage assessment (NRDA): Synthesis of assessment procedures. Integr. Environ. Assess. Manage. 5(4):515–522.

Henning, M., P. Fuchsman, M. Nielsen, and B. Kennington. 2008. Evaluating post-remedy and remedy- implementation risks at a PCB-contaminated site: Practical experiences. Prepared for the Fifth International Battelle Conference on Remediation of Contaminated Sediment, Jacksonville, FL. July.

Weinberg, N., M. Henning, M. Kladias, and M. Killingstad. 2003. Technical critique of the Multimedia, Multipathway, Multireceptor Risk Assessment Model. Human Ecol. Risk Assess. 9:1679–1700.

Henning, M.H., S.K. Robinson, K.J. McKay, J.P. Sullivan, and H. Bruckert. 2003. Productivity of American robins exposed to polychlorinated biphenyls, Housatonic River, Massachusetts, USA. Environ. Toxicol. Chem. 22:2783–2788.

Henning, M.H., N.M. Weinberg, and M.A. Branton. 2002. Using Ecological Risk Assessment to Evaluate Potential Risks Posed by Chemicals to Birds. Human and Ecological Risk Assessment: Theory and Practice. Second edition. D.J. Paustenbach (ed.). John Wiley & Sons, Inc., New York, New York.

Henning, M.H., N.M. Shear, N.D. Wilson, and T.J. Iannuzzi. 1999. Distributions for key exposure factors controlling the uptake of xenobiotic chemicals by great blue herons (Ardea herodius) through ingestion of fish. Human Ecol. Risk Assess. 5(1):125–144.

Henning, M.H., and N.M. Shear. 1998. Regulatory Perspectives on the significance of ecological change as reported in ecological risk assessments. Human Ecol. Risk Assess. 4(4) Part 2:807–814.

Henning, M.H., E.S. Ebert, R.E. Keenan, S.G. Martin, and J.W. Duncan. 1997. Assessment of effects of PCB-contaminated floodplain soils on reproductive success of insectivorous songbirds. Chemosphere 34:1121–1137.

Iannuzzi, T.J., N.W. Harrington, N.M. Shear, C.L. Curry, H. Carlson-Lynch, M.H. Henning, S.H. Su, and D.E. Rabbe. 1996. Distribution of key exposure factors controlling the uptake of xenobiotic chemicals in an estuarine food web. Environ. Toxicol. Chem. 15(11):1979–1992.

Menzie, C., M.H. Henning, J. Cura, K. Finkelstein, J. Gentile, J. Maughan, D. Mitchell, S. Petron, B. Potocki, S. Svirsky, and P. Tyler. 1996. Special report of the Massachusetts weight-of-evidence workgroup: A weight-of-evidence approach for evaluating ecological risks. Human Ecol Risk Assess. 2(2):277–304.

Massachusetts Weight-of-Evidence Workgroup. 1995. A weight-of-evidence approach for evaluating ecological risks. November 2. Available at: https://www.mass.gov/doc/a-weight-of-evidence- approach-for-evaluating-ecological-risks/download

Henning, M.H. 1991. Hazardous waste incinerator ash landfills: Pollutant release, modelling strategies and regulatory approaches. Masters Project, Duke University.

Henning, M.H., and K.H. Reckhow. 1990. Using Eutromod: Final Draft Report. Duke University, School of Forestry and Environmental Studies. 59 pp.

Marrapese, M., and M. Henning. 2024. Invited presenter on “PFAS Ban in Maine: What Companies Need to Know About Currently Unavoidable Use Requests” on independently organized public webinar. Virtual.

Henning, M., J. Gasper, and R. Foxx. 2023. Panel facilitator on “PFAS at Contaminated Sediment Sites” on independently organized public webinar. Virtual.

Henning, M., B. DeShields, C. Woods, and J. Talbert. 2023. Invited panel facilitator on “Legal, Technical, and Strategic Considerations for Environmental Justice under CERCLA.” Lawline CLE Live Course. Virtual.

Henning, M. 2023. Panel facilitator on “Panel Discussion: The Intersection of Environmental Justice and Contaminated Sediment Investigation and Remediation.” 11th International Conference on the Remediation and Management of Contaminated Sediments. In Person. Nashville, TN.

Henning, M. 2022. Invited panel facilitator on “Climate Change and Contaminated Sediments: What’s Happening in Massachusetts.” 38th Annual International Conference on Soils, Sediments, Water, and Energy. In Person. Amherst, MA.

Henning, M. 2022. EJ screening tools and select environmental programs. Presented at the 2022 Environmental & Energy, Mass Torts, and Products Liability Litigation Committees’ Joint Virtual Regional CLE Program. American Bar Association, Litigation Section. Virtual.

Bannister, T.A., S.A. Davis, M.H. Henning, and E.P. Wingert. 2022. Emerging contaminants: New risks and regulations. Presented “Evolving Regulatory Criteria for PFAS” at Perrin Conferences’ Impact of PFAS on Environmental Litigation Conference. Virtual.

Wilson, B., C. Woods, B. DeShields, and M. Henning. 2022. Panel discussion: The intersection of environmental justice and contaminated sediment investigation and remediation. Sediment Management Work Group Sponsors Forum. Virtual.

Jacobs, H., M. Henning, and D. Anning. 2022. Environmental Justice: Opportunities and Considerations for Business Leaders and their Advisors in Addressing Contaminated Sites. Lawline CLE Live Course. Virtual.

Henning, M.H., V.S. Magar, D. Pelletier, L. Brown, A. Glessner, J. Johnson, R. Ellison, and S. Henshaw. 2019. Voluntary investigation, remediation and restoration of a segment of the Detroit River area of concern. Platform presentation. 40th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Toronto, Ontario, Canada.

Pelletier, D., M.H. Henning, and J. Johnson. 2019. Monitored natural recovery from historical PCB releases in Stony Creek, Indiana. Poster presentation. 40th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Toronto, Ontario, Canada.

Fetters, K., P.C. Fuchsman, M.J. Bock, A. O’Connor, L. Brown, M.H. Henning, M. Lam, N. Pechacek, and K. Stanton. 2019. Environmental risk assessments for topical antiseptic ingredients: Benzalkonium chloride. Poster presentation. 40th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Toronto, Ontario, Canada.

Fuchsman, P.C., K. Fetters, M.J. Bock, A. O’Connor, L. Brown, M.H. Henning, M. Lam, N. Pechacek, and K. Stanton. 2019. Environmental risk assessments for topical antiseptic ingredients: Benzethonium chloride. Poster presentation. 40th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Toronto, Ontario, Canada.

O’Connor, A., P.C. Fuchsman, L. Brown, K. Fetters, M.J. Bock, M.H. Henning, M. Lam, N. Pechacek, and K. Stanton. 2019. Environmental risk assessments for topical antiseptic ingredients: Chloroxylenol. Poster presentation. 40th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Toronto, Ontario, Canada.

Fuchsman, P.C., L. Brown, A. O’Connor, and M.H. Henning. 2018. What do tissue residues tell us about the utility of body weight scaling for interspecies extrapolations in wildlife? Platform presentation. 39th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Sacramento, CA.

Brown, L., P.C. Fuchsman, J.B. Taylor, A.F. Brady, and M.H. Henning. 2018. Estimating polychlorinated biphenyl risks to birds: Dietary doses, egg concentrations and body weight scaling. Poster presentation. 39th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Sacramento, CA.

Henning, M., A. Glessner, L. Brown, K. Searcy Bell, and K. Kim. 2017. Conceptual site model for mercury-contaminated sediment in the St. Lawrence River area of concern. Platform presentation. 9th International Conference on Remediation and Management of Contaminated Sediments, New Orleans, LA.

Henning, M., A. Glessner, L. Brown, K. Searcy Bell, and K. Kim. 2017. Using a conceptual site model in stakeholder engagement and decision making at a mercury-contaminated sediment site: St. Lawrence River area of concern. Poster presentation. 13th International Conference on Mercury as a Global Pollutant, Providence, RI.

Fuchsman, P., L. Brown, V. Magar, and M. Henning. 2017. Methylmercury toxicity reference values for mammalian wildlife populations: Critical review and analysis. Platform presentation. 13th International Conference on Mercury as a Global Pollutant, Providence, RI.

Fuchsman, P. L.E. Brown, M.H. Henning, M.J. Bock, and V.S. Magar. 2017. Methylmercury toxicity reference values for mammalian wildlife populations: Critical review and analysis. Poster presentation. 38th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Minneapolis, MN.

Fuchsman, P.C., M.H. Henning, L. Brown, M.J. Bock, and V.S. Magar. 2016. Methylmercury effects on bird reproduction: Critical review and identification of toxicity reference values. Poster presentation. 37th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Orlando, FL.

Fuchsman, P., M. Sorensen, J. Conder, M. Henning, and V. Magar. 2015. Toxicity reference values for mercury and their effect on sediment cleanup goals. Platform presentation. Eighth International Conference on Remediation and Management of Contaminated Sediments, New Orleans, LA.

Henning, M., D. Pelletier, M. Irving, and K. Sullivan. 2015. A framework for determining causes of impairment at contaminated sites. Platform presentation. Eighth International Conference on Remediation and Management of Contaminated Sediments, New Orleans, LA.

Henning, M., D.M. Pelletier, M. Irving, and K. Sullivan. 2014. A framework for determining causes of ecosystem service impairment at contaminated sites. Poster presentation. Annual Meeting of ACES: A Community on Ecosystem Services, Washington, DC.

Fuchsman, P.C., M.T. Sorensen, L. Brown, M.J. Bock, A.C. Daniel, C. Beals, V.S. Magar, and M.H. Henning. 2014. Are methylmercury toxicity reference values predictive of effects on fish populations? Platform presentation. 35th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Vancouver, BC.

Fuchsman, P.C., W. Mahaney, L. Brown, M. Ferguson, M.J. Bock, K.B. Leigh, and M.H. Henning. 2014. PCB effects on bird reproduction: genetics, laboratory exposures, and field studies. Platform presentation. 35th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Vancouver, BC, Canada.

Hayter, S., R. Joyner, R. Santiago, and M. Henning. 2014. The ongoing development of an environmental dredging project in the St. Clair River, based upon a risk-based evaluation process, Sarnia, Ontario, Canada. Platform presentation. XXXIV Technical Conference & TAMU 45 Dredging Seminar, Toronto, Ontario, Canada.

Fuchsman, P.C., M.H. Henning, E. Perruchon, L. Brown, and V.S. Magar. 2013. Critical review of mercury toxicity reference values for avian and mammalian wildlife. Poster presentation. 34th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Nashville, TN.

Conder, J.M., M.M. Grover, P.C. Fuchsman, V.S. Magar, and M.H. Henning. 2013. Critical review of mercury sediment quality values for protection of benthic invertebrates. Platform presentation. 34th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Nashville, TN.

Fuchsman, P., J. Conder, M. Grover, V. Magar, and M. Henning. 2013. Critical review of mercury sediment quality values for benthic invertebrates. 11th International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, UK.

Henning, M., et al. 2013. Evaluation of sediment remediation options for priority areas in the St. Clair River that pose a risk to fish due to bioaccumulation of mercury and methylmercury. 11th International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, UK.

Henning, M., P. Fuchsman, E. Perruchon, C. Dunn, and V. Magar. 2013. Critical review of mercury toxicity reference values: Avian and mammalian wildlife. 11th International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, UK.

Henning, M., et al. 2013. Net environmental benefit analysis for the evaluation of remedial alternatives for mercury contaminated sites. 11th International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, UK.

Fuchsman, P., M. Sorensen, L. Brown, M. Bock, A. Daniel, C. Beals, V. Magar, and M. Henning. 2013. Critical review of mercury toxicity reference values for protection of fish. 11th International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, UK.

Henning, M., et al. 2013. Development of risk-based management goals for Peninsula Harbour, Lake Superior. 20th Annual Symposium on the Great Lakes/St. Lawrence River Ecosystem, Cornwall, Ontario, Canada.

Fuchsman, P.C., A.K. Gevertz, A. Fogg, E. Perruchon, M. Cisz, and M. Henning. 2012. Mercury toxicity thresholds for birds and implications for appropriate exposure metrics. Platform presentation. 33rd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Long Beach, CA.

Brown, L.E., P.C. Fuchsman, and M. Henning. 2012. Metal effects on benthic invertebrates in off-site ponds near the Deloro Mine site (Ontario, Canada). Platform presentation. 33rd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Long Beach, CA.

Fogg, A., M. Henning, and J. Nicolette. 2012. BIMS: A database of baseline physical, chemical, and ecological conditions in the Gulf of Mexico prior to the Deepwater Horizon accident. Poster presentation. 33rd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Long Beach, CA.

Leigh, K.B., M.H. Henning, A.L. Fogg, P. Fuchsman, E. Perruchon, and N.E. Dyck. 2011. To depurate or not to depurate? Using earthworm tissue to estimate doses in ecological risk assessment. Poster presentation. 32nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Boston, MA.

Pelletier, D., M.H. Henning, A.L. Fogg, and J. Johnson. 2011. Monitored recovery from historical PCB releases in Stony Creek, Indiana. Poster presentation. 32nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Boston, MA.

Fogg, A.L., M.H. Henning, A.R. Glessner, N.R. Pinheiro, and J.M. Johnson. 2011. Meeting risk management goals and minimizing remedial impacts for a PCB-contaminated floodplain: The habitat enhancement option. Platform presentation. 32nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Boston, MA.

Richman, L., D. Milani, and M. Henning. 2011. Delineation of areas for sediment management in the St. Clair River using invertebrate methyl mercury tissue concentrations. Platform presentation. 32nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Boston, MA.

Henning, M.H., A.R. Glessner, A.L. Fogg, D. Pelletier, C. Stubbs, and J. Johnson. 2011. A comprehensive evaluation of risk to human health and ecological receptors in a PCB-contaminated floodplain. Platform presentation. 32nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Boston, MA.

Merritt, K., A. Glessner, M. Henning, and V. Magar, M. 2011. Site remediation through thin-layer placement of a sand cap in the Peninsula Harbour, Ontario area of concern. Poster presentation. 10th International Conference on Mercury as a Global Pollutant, Halifax, Nova Scotia, Canada.

Nicolette, J., F. Colombo, G. Quadri, and M. Henning. 2011. A comparative analysis (CA) to select the best remedial alternatives for the ecosystem of Pallanza Bay (Lake Maggiore). Poster presentation. 21st Annual Meeting of the European Chapter of the Society of Environmental Toxicology and Chemistry, Milan, Italy.

Barrett, C.H., K. Taillon, K. Kim, D. Milani, M. Chambers, M. McChristie, M.H. Henning, P. Fuchsman, and P.M.C Antunes. 2011. Use of multiple lines of evidence to support sediment remediation and management decisions for the St. Mary’s River area of concern. Poster presentation. 54th International Conference on Great Lakes Research, Duluth, MN.

Henning, M., R. Osborn, M. Bock, and S. Bhavsar. 2011. Increasing certainty in risk-based sediment remediation decisions: Peninsula Harbour case study on risk to fish from mercury. Platform presentation. Battelle Sixth International Conference on Remediation of Contaminated Sediments, New Orleans, LA.

Henning, M., A. Glessner, D. Pelletier, and J. Johnson. 2011. Effective remediation decision-making for PCB-contaminated floodplain soil. Platform presentation. Battelle Sixth International Conference on Remediation of Contaminated Sediments, New Orleans, LA.

Bizzotto, E.C., S. Ceccon, F. Colombo, A. Fogg, M. Henning, and L. Zaninetta. 2011. A case study: DDT and mercury sediment contamination and ecological risk assessment for aquatic biota in Lake Maggiore (Italy). Platform presentation. Battelle Sixth International Conference on Remediation of Contaminated Sediments, New Orleans, LA.

Richman, L., D. Milani, and M. Henning. 2011. Delineation of areas for sediment management in the St. Clair River using invertebrate methyl mercury tissue concentrations. Platform presentation. Canadian Association on Water Quality 46th CENTRAL Canadian Symposium on Water Quality Research, Burlington, ON, Canada.

Borgmann, A., R. Jaagumagi, N. Diep, M. Henning, N. Benoit, and R. Santiago. 2011. Comparison of sediment management strategies developed for three Canadian PCB-contaminated sites. Platform presentation. Canadian Association on Water Quality 46th CENTRAL Canadian Symposium on Water Quality Research, Burlington, ON, Canada.

Fogg, A.L., M.H. Henning, and A.C. Daniel. 2010. Review of the toxicity of DDE to birds and development of avian toxicity reference values. Platform presentation. 31st Annual Meeting of the Society of Environmental Toxicology and Chemistry, Portland, OR.

Fuchsman, P., E. Perruchon, E. Bizzotto, and M.H. Henning. 2010. An evaluation of cause-effect relationships between DDT (and metabolites) and sediment toxicity to benthic invertebrates. Poster presentation. 31st Annual Meeting of the Society of Environmental Toxicology and Chemistry, Portland, OR.

Leigh, K., M. Henning, and P. Fuchsman. 2010. The role of ecological risk assessment in delisting of Wheatley Harbour area of concern. Platform presentation. 37th Annual Aquatic Toxicity Workshop, Toronto, ON, Canada.

Henning, M., et al. 2010. Beyond the hazard quotient: Case study of risk assessment for Peninsula Harbour fish exposed to mercury. North Atlantic Chapter Meeting of the Society for Environmental Toxicology and Chemistry, Narragansett, RI.

Henning, M.H., A. Glessner, and K.S. Wells. 2009. Integration of geospatial and risk-based analyses to prioritize sediment management actions for the St. Clair River area of concern. Poster presentation. 30th Annual Meeting of the Society of Environmental Toxicology and Chemistry, New Orleans, LA.

Henning, M.H., D. Pelletier, A.L. Fogg, A. Glessner, and P. Fuchsman. 2009. Assessment of potential risks to mink from PCBs in an undeveloped floodplain forest. Platform presentation. 30th Annual Meeting of the Society of Environmental Toxicology and Chemistry, New Orleans, LA.

Bock, M., M.H. Henning, P. Fuchsman, and A. Glessner. 2009. Strengthening risk conclusions with an analysis of fish fitness and sex ratios in the St. Clair River. Platform presentation. 30th Annual Meeting of the Society of Environmental Toxicology and Chemistry, New Orleans, LA.

Leigh, K.B., K.S. Wells, A.L. Fogg, M.H. Henning, W. Hall, and C. Allaway. 2009. Development of contaminated site characterization guidance for sampling in support of human health and environmental risk assessments within Canada. Poster presentation. 30th Annual Meeting of the Society of Environmental Toxicology and Chemistry, New Orleans, LA.

Henning, M., J. Lyndall, M.J. Bock, T. Barber, and D. Lauren. 2009. A probabilistic fate and effects model for pharmaceuticals and personal care products. Platform presentation. Sixth Annual Water Resources Research Conference, Amherst, MA.

Fuchsman, P., K. Leigh, M. Henning, and P. Welsh. 2009. Risks to mink from PCBs in Muddy Creek, Wheatley Harbour area of concern, Ontario. Platform presentation. Battelle Fifth International Conference on Remediation of Contaminated Sediments, Jacksonville, FL.

Pelletier, D., A. Glessner, M. Henning, M. Bock, V. Magar, and R. Wenning. 2009. Current conditions in the Saginaw River, its floodplain, and Inner Saginaw Bay. Platform presentation. Battelle Fifth International Conference on Remediation of Contaminated Sediments, Jacksonville, FL.

Leigh, K., K. McKay, M. Henning, and K. Merritt. 2008. Evaluation of mink and river otter habitat suitability within the Peninsula Harbour shoreline in Lake Superior, Canada. 15th Annual Conference of the Wildlife Society, Miami, FL.

Henning, M., K. Leigh, K. Merritt, V. Magar, and R. Santiago. 2008. Assessment and mitigation of ecological risks posed by mercury and PCBs in Peninsula Harbour sediment, Lake Superior. Federal Contaminated Sites National Workshop, Vancouver, BC, Canada.

Henning, M., et al. 2008. Innovative evaluation of risks to mink from PCBs in Muddy Creek, Wheatley Harbour area of concern, Lake Erie, Ontario. 51st Annual Conference on Great Lakes Research by the International Association for Great Lakes Research, Peterborough, ON, Canada.

Stubbs, C., I. Benekos, M. Henning, T. Barber, and R. Santiago. 2007. An integrated approach to the management of contaminated harbour sediment: Peninsula Harbour human health risk assessment. Poster presentation. 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Milwaukee, WI.

Bock, M., E. Martin, M. Henning, A. Piper, T. Barber, and R. Santiago. 2007. An integrated approach to the management of contaminated harbour sediment: Peninsula Harbour remediation goals, management areas, and residual risk. Poster presentation. 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Milwaukee, WI.

Henning, M., K. Leigh, P. Fuchsman, T. Barber, and R. Santiago. 2007. An integrated approach to the management of contaminated harbour sediment: Peninsula Harbour ecological risk assessment. Poster presentation. 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Milwaukee, WI.

Henning, M., M. Bock, E. Martin, A. Piper, C. Stubbs, I. Benekos, T. Barber, and R. Santiago. 2007. Determining sediment management goals and remediation scenarios to minimize human health risk from contaminated sediment in Peninsula Harbour, Lake Superior, Canada. Poster presentation. RTI International 2007 EPA Fish Forum, Portland, ME.

Henning, M., P. Fuchsman, M. Nielsen, and B. Kennington. 2007. Evaluating post-remedy and remedy-implementation risks at a PCB-contaminated site: Practical experiences. Platform presentation. Battelle Fourth International Conference on Remediation of Contaminated Sediments, Savannah, GA.

Leigh, K.B., M.H. Henning, M.J. Bock, and M.C. Capdevielle. 2006. Probabilistic exposure distributions developed for the uptake of triclosan by representative avian species in freshwater aquatic environments. Poster presentation. 27th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Montreal, QC, Canada.

Watts, S.C., D.J. Santillo, D. Pelletier, and M. Henning. 2006. Application of a restoration inventory to natural resource damage assessments. Platform presentation. Annual International Conference on Soils, Sediments and Water, Amherst, MA.

Keenan, R.E., E.S. Ebert, and M.H. Henning. 2004. Principle or practice? That is the question! 2004 Annual Meeting of the Society of Risk Analysis, Palm Springs, CA.

Henning, M., et al. 2002. Robin productivity in the Housatonic River watershed. 23rd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Salt Lake City, UT.

Weinberg, N., T. Purcell, and M. Henning. 2001. Use of fish advisories in initiating TMDL requirements. Platform presentation. 22nd Annual Meeting of the Society of Environmental Toxicology and Chemistry, Baltimore, MD.

Henning, M., et al. 2000. Evaluation of ecological components of USEPA’s Multimedia, Multipathway, Multireceptor Risk Assessment (3MRA) model. 21st Annual Meeting of the Society of Environmental Toxicology and Chemistry, Nashville, TN.

Shear, N.M., P.O. Gwinn, J. Rothrock, M.H. Henning, S.A. Lewis, and J.C. Banks. 1998. Title III delisting of ethylene glycol monobutyl ether—A weight-of-evidence approach for evaluating an emissions inventory. Annual Meeting of the Air and Waste Management Association, San Diego, CA.

Gwinn, P.O., N.M. Shear, J. Rothrock, M.H. Henning, S.A. Lewis, J.C. Banks, and J. Harrington. 1998. Title III delisting of ethylene glycol monobutyl ether—An assessment of emissions and health effects of a hazardous air pollutant. Annual Meeting of the Air and Waste Management Association, San Diego, CA.

Schmidt, C.S., M.H. Henning, and E.S. Ebert. 1996. Proposed method for evaluating the effects of PCBs in sediment on egg mass viability and reproductive success in frogs. 17th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Washington, DC.

Henning, M., C. Menzie, J. Cura, J. Gentile, S. Svirsky, P. Tyler, K. Finklestein, J. Maughan, D. Mitchell, S. Petron, and B. Potocki. 1995. Resolving conflicting lines of evidence in ecological risk assessment. 16th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Vancouver, BC, Canada.

Henning, M.H., E.S. Ebert, E.R. Algeo, and R.E. Keenan. 1995. Assessment of effects of PCB-contaminated sediments and floodplain soils on reproduction and community structure of insectivorous songbirds. 15th International Symposium on Chlorinated Dioxins and Related Compounds, Edmonton, AB, Canada.

Henning, M.H., N.L. Bonnevie, and D.G. Gunster. 1994. Towards a workable ecological risk assessment guidance: Selecting reference sites. 15th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Denver, CO.

Shear, N.M., M.H. Henning, J.G. Ducey, and M.C. Maritato. 1994. Towards a workable ecological risk assessment guidance: Developing a screening criteria based on home range sizes. 15th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Denver, CO.

Henning, M., et al. 1994. Historical and current factors influencing the ecological risks from an industrialized estuary. 15th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Denver, CO.

Algeo, E.R., J. Ducey, M.H. Henning, D.G. Gunster, and C. Schmidt. 1994. Towards a workable ecological risk assessment guidance: Selecting indicator species. 15th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Denver, CO.

Henning, M., et al. 1993. Population approach to assessing ecological impact of contaminated soils in a floodplain ecosystem. Annual Conference for the Society of Risk Analysis, Savannah, GA.

Henning, M., et al. 1993. Application of Jury’s Behavior Assessment Model to estimate emissions of polychlorinated biphenyls from soil. 14th Annual Meeting of the Society of Environmental Toxicology and Chemistry, Houston, TX.

Keenan, R.E., M. Henning, P.E. Goodrum, M.N. Gray, R.A. Sherer, and P.S. Price. 1993. Using a microexposure Monte Carlo risk assessment for dioxin in Maine (US) fish to evaluate the need for fish advisories. Dioxin ’93, 13th International Symposium on Chlorinated Dioxins and Related Compounds, Vienna, Austria.

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