Science Inventory

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Wildland fire is a major global driver in the exchange of aerosols between terrestrial environments and the atmosphere. This exchange is commonly quantified using emission factors or the mass of a pollutant emitted per mass of fuel burned. However, emission factors for microbes a...

The 3-30-300 rule offers benchmarks for cities to promote equitable nature access. It dictates that individuals should see three trees from their dwelling, have 30 % tree canopy in their neighborhood, and live within 300 m of a high-quality green space. Implementing this demands ...

Background:  Tissue fusion is a mechanism involved in the development of the heart, iris, genital tubercle, neural tube, and palate during embryogenesis. Failed fusion of the palatal shelves could result in cleft palate (CP), a common birth defect. Organotypic models co...

This presentation contributes to the SoCal Pb symposium which seeks to raise awareness, share knowledge, and discuss actionable next steps towards solutions to reduce lead risk in LA.

Microscopy is often the first step in microplastic analysis and is generally followed by spectroscopy to confirm material type. The value of microscopy lies in its ability to provide count, size, color, and morphological information to inform toxicity and source apportionment. To...

Quality assurance and quality control (QA/QC) techniques are critical to analytical chemistry, and thus the analysis of microplastics. Procedural blanks are a key component of QA/QC for quantifying and characterizing background contamination. Although procedural blanks are becomi...

Fires that occur in the wildland urban interface (WUI) often burn structures, vehicles, and their contents in addition to biomass in the natural landscape. Because these fires burn near population centers, their emissions may have a sizeable impact on public health, necessitating...

Metals and metalloids are widely used in producing plastic materials as fillers and pigments, which can be used to track the environmental fate of real-life nanoplastics in environmental and biological systems. Therefore, this study investigated the metal and metalloids concentra...

Overview presentation on ORD’s Technical Assistance Program for Emerging Contaminants

This presentation provides a critical review of state and federal initiatives and peer-reviewed literature to define best practices for managing PFAS-containing solid wastes and identify data gaps to guide future research. The objective is to inform stakeholders about waste-deriv...

To present EPA PFAS research to the primacy agency and small drinking water utilities in Idaho. 

Introduction: Studies of gastrointestinal physiology and the gut microbiome often consider the influence of intestinal region on experimental endpoints. However, this same consideration is not often applied to the gut metabolome. Understanding the contribution of gut regionality...

PFAS are ubiquitous, persistent, and bioaccumulate in the environment. Thermal treatment methods are currently applied to a variety of PFAS-containing materials, including sewage sludge and granular activated carbon (GAC), but may not be sufficient to fully mineralize organic flu...

The Health and Environmental Sciences Institute Developmental and Reproductive Toxicology (HESI-DART) group held a hybrid in-person and virtual workshop in Washington, DC, in 2022. The workshop was entitled, "Interpretation of DART in Regulatory Contexts and Frameworks.&quot...

The purpose of this article is to briefly review the published literature on the developmental neurotoxic effects, including potential mechanisms of four butanols: n-butanol, sec-butanol, tert-butanol, isobutanol, and identify data gaps and research needs for evaluation of human ...

Textbook chapter on "Risk Assessment, Risk Management, and Regulation of Halogenated Organic Chemicals: Current Practice and Future Directions" for the book "Neurotoxicity of Halogenated Organic Compounds"

The integrated forest ecosystem model ForSAFE-Veg was used to simulate soil processes and understory vegetation composition at three—sugar maple, beech, yellow birch—hardwood forest sites in the Northeastern United States (one at Hubbard Brook, NH, and two at Bear Bro...

On November 30, 2020, EPA released the draft report, “ORD Staff Handbook for Developing IRIS Assessments,” or “IRIS Handbook,” which provides the operating procedures for developing assessments to the scientists in the IRIS Program. The IRIS Handbook implements recommendations an...

In April 2021, EPA released the Systematic Review Protocol for the Vanadium and Compounds (Oral Exposure) IRIS Assessment (Preliminary Assessment Materials). As part of developing a draft IRIS assessment, EPA presents a methods document, referred to as the protocol, for conductin...

The <em>2019 Integrated Science Assessment for Particulate Matter</em> (PM ISA) provides the scientific foundation for review of the primary and secondary National Ambient Air Quality Standards (NAAQS) for particulate matter (PM). The PM ISA contains an evaluation and synthesis o...

The BMD model code and modeling results are included in the files. These files support data and results provided in the draft IRIS assessment for inorganic arsenic (external review draft).

The Ecological Risk Assessment Support Center (ERASC) announced the release of the final document, <em>Summary Report. Separating Anthropogenic Metals Contamination from Background: A Critical Review of Geochemical Evaluations and Proposal of Alternative Methodology</em>. Meaning...

EPA released the report, “ORD Staff Handbook for Developing IRIS Assessments,” or “IRIS Handbook,” which provides the operating procedures for developing assessments to the scientists in the IRIS Program. The IRIS Handbook implements recommendations and input from the National Ac...

In March 2021, EPA released the <em>Systematic Review Protocol for the Inorganic Mercury Salts IRIS Assessment (Preliminary Assessment Materials)</em>. As part of developing a draft IRIS assessment, EPA presents a methods document, referred to as the protocol, for conducting a ch...

Assessing health outcomes associated with exposure to polychlorinated biphenyls (PCBs) is important given their persistent and ubiquitous nature. PCBs are classified as a Group 1 carcinogen, but the full range of noncancer health effects that could result from exposure to PCBs ha...