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Records 26 to 50 of 11198 records published after 01/07/2015

Impacts of tiled land cover characterization in the Model for Predictions Across Scales-Atmosphere (MPAS-A)
(JOURNAL) [Published : Aug 08, 2020]
Parameterization of subgrid-scale variability of land cover characterization (LCC) is an active area of research, and can improve model performance compared to the dominant (i.e., most abundant tile) approach. The “Noah” land surface model implementation in the globa...
Distribution System Water Quality and Treatment Residuals: Arsenic and Other Contaminants
(PRESENTATION) [Presented : Sep 03, 2020]
The US EPA’s arsenic demonstration program evaluated arsenic removal technologies at 50 small drinking water systems across the US in 2004-2010. Among many considerations were the treated drinking water quality and the type/quantity of treatment residuals that needed dispos...
Variation in stream network relationships and geospatial predictions of watershed conductivity
(JOURNAL) [To be published : Dec 01, 2020]
Secondary salinization, the increase of anthropogenically-derived salts in freshwaters, threatens freshwater biota and ecosystems, drinking water supplies, and infrastructure. The various anthropogenic sources of salts and their locations in a watershed may result in secondary sa...
A synthesis of case studies from Narragansett Bay (RI/MA, USA) emphasizing implementation of the US Clean Water Act using adaptive management.
(PUBLISHED REPORT) [Published : May 01, 2020]
Over the last 40 years, Narragansett Bay has experienced significant water quality improvements in response to reductions in nitrogen, heavy metal and organic contaminants, and bacterial pathogen discharge. The sources of these pollutants stem from the long history of population ...
The Impact of Algicide Exposure on Cyanobacterial Responses to Oxidation
(PRESENTATION) [Presented : Sep 02, 2020]
A series of bench-scale trials evaluated the impacts of CuSO4 and KMnO4 exposure on suspensions of toxin-producing Microcystis aeruginosa at CuSO4 doses of 0, 0.1, 0.5, and 1.0 mg Cu/L; and pH levels of 6, 7, and 8. Cell suspensions were exposed to CuSO4 for 24 hours, followed b...
Lead Particulate Release
(PRESENTATION) [Presented : Sep 03, 2020]
The objective of this presentation will be to provide an overview of lead particles in water.
Systematic Review Protocol for the Perfluorohexanesulfonic Acid (PFHxS) IRIS Assessment (Preliminary Assessment Materials)
(IRIS ASSESSMENT) [Published : Nov 08, 2019]
In November 2019, EPA released the <em>Systematic Review Protocol for the PFBA, PFHxA, PFHxS, PFNA, and PFDA IRIS Assessments</em> for a 45-day public comment period. As part of developing a draft IRIS assessment, EPA presents a methods document, referred to as the protocol, for ...
New frontiers in toxicology: Predictive tools for cross species extrapolation
(PRESENTATION) [Presented : Sep 02, 2020]
Cell-based high-throughput screening (HTS) and computational technologies are being applied as tools for toxicity testing in the 21st century. The U.S. Environmental Protection Agency (EPA) embraced these technologies and created the ToxCast Program in 2007, which has served as a...
Use of study-specific MOE-like estimates to prioritize health effects from chemical exposure for analysis in human health assessments
(JOURNAL) [Published : Aug 30, 2020]
A December, 2013 report from the National Research Council (NRC) made a number of recommendations pertaining to evidence evaluation, systematic review, and dose-response (including meta-analysis) to the United States Environmental Protection Agency (EPA) for the development of an...
Screening the Vast PFAS Landscape: In Vitro Toxicokinetic Testing and UPLC-MS/MS Analysis
(PRESENTATION) [Presented : Jul 21, 2020]
Per- and polyfluoroalkyl substances (PFAS) have become chemicals of concern for human health as more is learned about their widespread presence and persistence in the environment. Given the inclusion of 1,220 PFAS on the Toxic Substances Control Act inventory, the availability of...
Characterization of emissions from a pilot-scale combustor operating on coal blended with woody biomass
(JOURNAL) [Published : Mar 15, 2020]
Emissions generated from the combustion of coal have been a subject of regulation by the United States Environmental Protection Agency (U.S. EPA) and State agencies for years, as they have been associated with adverse effects on human health and the environment. Over the past se...
Long-term PM2.5 exposure as a risk factor for 30-day hospital readmissions among heart failure patients
(PRESENTATION) [Presented : Aug 27, 2020]
Background: Hospital readmissions represent a health and economic burden to patients and the healthcare system. We understand little about the relationship between long-term environmental exposures and hospital readmission risk. Here, we use electronic health records linked to ex...
Patterns, Risk, and Drivers of Cyanobacterial Algal Blooms Across the U.S.
(PRESENTATION) [Presented : Sep 02, 2020]
Presentation on ongoing analyses about cyanobacteria harmful algal blooms patterns and drivers across the US to colleagues at the Oregon Department of Environmental Quality
Science to Inform Policy
(PRESENTATION) [Presented : Sep 08, 2020]
Presentation on how science can be used to inform public health policy, with a focus on national ambient air quality standards.
A Brief Introduction to Bayesian Networks in DASEES
(PRESENTATION) [Presented : May 29, 2020]
The presentation provides a general introduction for an audience interested in the use of Bayesian networks for decision-making with DASEES (Decision Analysis for a Sustainable Environment, Economy, and Society). It briefly describes: What a Bayesian network is, what are the bene...
Urban Wind Field Analysis from the Jack Rabbit II Special Sonic Anemometer Study
(JOURNAL) [To be published : Dec 15, 2020]
The Jack Rabbit II Special Sonic Anemometer Study (JRII-S), a field project designed to examine the flow and turbulence within a systematically arranged mock-urban environment constructed from CONEX shipping containers, is described in detail. The study involved the deployment of...
Surface Heterogeneity Mediated Transport of Hydrochar Nanoparticles in Heterogeneous Porous Media
(JOURNAL) [Published : Sep 01, 2020]
Hydrochar has recently showed great potential for soil amendment, bioenergy production, and wastewater treatment. Thus, unravelling the mechanisms controlling the mobility of hydrochar in the subsurface is a high priority research frontier. Herein, the effects of phosphate (P) an...
Improving surface PM2.5 forecasts in the U.S. using an ensemble of chemical transport model outputs, part I: bias correction with surface observations in non-rural areas
(JOURNAL) [Published : Jul 22, 2020]
This work is the first of a two-part study that aims to develop a computationally efficient bias-correction framework to improve surface PM2.5 forecasts in the U.S. Here, an ensemble-based Kalman Filter (KF) technique is developed primarily for non-rural areas with approximately ...
Surface Decontamination Options for a Fentanyl-Contaminated Building Interior
(PRESENTATION) [Presented : Nov 08, 2019]
Presentation on fentanyl decontamination research to the 11th US EPA Int. Decon R&D Conference. The presentation will provide an overview of EPA’s current role in fentanyl responses and will contain results from decontamination research that was initiated to fill select gaps ide...
Development of an In Vitro Human Thyroid Microtissue Model
(PRESENTATION) [Presented : Jun 25, 2020]
The US EPA Endocrine Disruptor Screening Program (EDSP) has identified several molecular thyroid targets relevant to hormone synthesis dynamics that have been adapted to high-throughput screening (HTS) assays to rapidly evaluate the ToxCast/Tox21 chemical inventories for potentia...
A systematic literature review for the determination of “negative” chemical compounds for developmental neurotoxicity (DNT) assay evaluation
(PRESENTATION) [Presented : Jun 25, 2020]
A diverse range of chemicals have been associated with cognitive deficits following prenatal and/or postnatal exposure in humans and animal models. To date, however, less than 200 chemicals have been tested in EPA or OECD guideline DNT studies. To address this gap, a battery of ...
Quantifying the Human Health Benefits of Using Satellite Information to Detect Cyanobacterial Harmful Algal Blooms and Manage Recreational Advisories in U.S. Lakes
(JOURNAL) [Published : Aug 25, 2020]
Significant recent advances in satellite remote sensing allow environmental managers to detect and monitor cyanobacterial harmful algal blooms (cyanoHAB), and these capabilities are being used more frequently in water quality management. A quantitative estimate of the socioeconom...
Associations Between Dust Storms and Intensive Care Unit Admissions in the United States, 2000-2015
(JOURNAL) [Published : Jun 29, 2020]
Anthropogenic climate change is influencing the incidence of dust storms and associated human exposure to coarse particulate matter (PM2.5-10) in the United States (US). Studies have found adverse health consequences related to dust exposure. These consequences include respirator...
Risk Assessment Training & Experience (RATE) Module Series on Risk Assessment Basics (RAB): Modules 101-103
(PRESENTATION) [Presented : Sep 08, 2020]
This covers three separate course modules all related to developing a basic foundation for understanding Risk Assessment. RAB 101 - The objective of this course is to provide participants with a basic introduction to the fundamental concepts and terminology associated with risk a...
Ultrafine Particle and Volatile Organic Compound Emissions from a 3D Printer Filament Extruder Slides
(PRESENTATION) [Presented : Aug 17, 2020]
Fused Deposition Modeling (FDM) or Fused Filament Fabrication (FFF) 3D printers have been shown in numerous studies to emit incidental ultrafine (1-100 nm) particles and volatile organic compounds (VOCs) from the use of plastic filaments. Filament extruders have recently entered ...