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Records 1 to 25 of 76842

Short-term effect of simulated salt marsh restoration by sand-amendment on sediment bacterial communities (JOURNAL)
Coastal climate adaptation strategies are needed to build salt marsh resiliency and maintain critical ecosystem services in response to impacts caused by climate change. Although resident microbial communities perform crucial biogeochemical cycles for salt marsh functioning, thei...
Engineering Issue: Soil Vapor Extraction (SVE) Technology (PUBLISHED REPORT)
The U.S. Environmental Protection Agency (EPA) Engineering Issue Papers (EIPs) are a series of technology transfer documents that summarize the latest information on selected waste treatment and site remediation technologies and related issues. The information is presented in a c...
20190622 - Application of AOPs to Developmental Outcomes (Teratology Society) (PRESENTATION)
AOP-based ontologies provide the necessary structure for quantitative prediction of cellular and tissue responses to molecular perturbation(s). For DevTox, this can be demonstrated by an AOP framework for embryonic vascular disruption represented in the OECD AOP-KB (Aop43). Becau...
20190521 - The EPA CompTox Chemicals Dashboard – An integration hub for data supporting computational toxicology (NURA) (PRESENTATION)
The U.S. Environmental Protection Agency (EPA) Computational Toxicology Program integrates advances in biology, chemistry, and computer science to help prioritize chemicals for further research based on potential human health risks. This involves computational and data-driven app...
Air and Energy Research & Collaboration (PRESENTATION)
The U.S. Environmental Protection Agency’s (i.e., EPA’s or the Agency’s) Air and Energy Management Division (AEMD) in the Office of Research and Development’s (ORD’s), National Risk Management Research Laboratory (NRMRL) performs advanced methods dev...
20190520 - Fusing Exposure Data and Models to Reduce Uncertainty (PRESENTATION)
Prioritizing the thousands of chemicals that occur in commerce with respect to potential risk posed to the public health requires tools that can estimate exposure from limited information. Human exposure biomarker data indicates that consumer products are a primary source of chem...
Using Air Sensors to Build Capacity to Measure Air Pollution Mitigation Strategies at Schools – A Case Study at Brookfield Elementary School, Oakland, CA (PRESENTATION)
Research indicates that noise and vegetative barriers, separately or in combination, can reduce downwind air pollutant concentrations near busy roads. EPA and its project partners are participating in an ongoing effort to measure the spatial patterns of traffic-related gas- and p...
Overview of ISO Standard 19867-1:2018 Laboratory Testing of Cookstoves (PRESENTATION)
This presentation provides an overview of ISO Standard 19867-1, Laboratory Testing of Cookstoves. Included in the overview is information on (1) how the ISO standard was developed, (2) how emissions and efficiency testing is conducted, (3) how safety testing is conducted, and (3...
20190310 - Read-across: From theory to practical application (SOT) (PRESENTATION)
Read-across is a well-established data gap filling technique used within analogue and category approaches. There are several steps in the category workflow starting from analogue identification, analogue evaluation, data gap filling through to uncertainty assessment. There are a ...
Multivariate calibration for carbon nanotubes in the environment using the microwave induced heating method (JOURNAL)
With continuous increase in production and application of various types of carbon nanotubes (CNTs), the presence of a mixture of different types of CNTs in the environment cannot be neglected. Since distinct types of CNTs have different influences on environmental and human healt...
TEVA-SPOT Toolkit and user's manual- version 2.5.2 (PUBLISHED REPORT)
Report and software
Bayesian Models and Model Averaging Software (External Review, 2018) ()
In 2018, the BMDS Bayesian models and Bayesian model averaging (BMA) software package for performing dose-response analyses of dichotomous data was externally reviewed by three experts in Bayesian risk assessment methods and dose-response modeling. Peer review comments are docume...
Control of Legionella pneumophila in water by a paper filter impregnated with silver nanoparticles and UV-LED (PRESENTATION)
Culturable cell numbers decreased by more than 90% (1-log inactivation) and 99.99% (4-log inactivation) after 2- and 10-minute incubation periods, respectively, whereas no significant physical removal of bacterial cells while filtering was observed. These results suggested that t...
POU Water Filters Effectively Reduce Lead in Drinking Water: A Demonstration Field Study in Flint, Michigan (JOURNAL)
A field study was conducted to test the effectiveness of faucet-mounted point of use (POU) water filters for removing high concentrations of lead that can occur in drinking water due to plumbing sources including lead service lines (LSL). These filters were concurrently certified...
Kingsbury Bay-Grassy Point Habitat Restoration: A Health Impact Assessment slides for Minnesota Department of Natural Resources public meeting (PRESENTATION)
Health Impact Assessments (HIA) are cooperative research projects where stakeholders and decision makers are actively involved in the process. The Mid-Continent Ecology Division conducted an HIA on a habitat restoration project in the St. Louis River. The Minnesota Department of ...
An algorithm for quantitatively estimating non-occupational pesticide exposure intensity for spouses in the Agricultural Health Study. (JOURNAL)
Residents of agricultural areas experience pesticide exposures from sources other than direct agricultural work. We developed a quantitative, active ingredient-specific algorithm for cumulative (adult, married lifetime) non-occupational pesticide exposure intensity for spouses of...
Generalized concentration addition model predicts glucocorticoid activity bioassay responses to environmentally detected receptor-ligand mixtures (JOURNAL)
Attached is a manuscript which includes a broad introduction and reasoning for the study, as well as a detailed study design, results and conclusions. The manuscript was written with the intent of submission to Toxicological Sciences for peer-review and publication. -----(ABSTRAC...
Full-Scale Decontamination of Bacillus Spores from Drinking Water Infrastructure (SUMMARY)
The drinking water distribution system is vulnerable to contamination, which presents challenges to maintaining good water quality and ensuring water availability. Decontamination of drinking water systems, following an intentional contamination incident or a natural disaster, is...
Agrochemical Mixtures and Amphibians: The Combined Effects of Pesticides and Fertilizer on Stress, Acetylcholinesterase Activity, and Bioaccumulation in a Terrestrial Environment (JOURNAL)
Tank mixtures are popular within the agricultural community because they are time‐ and cost‐effective, but field applications leave nontarget organisms at risk of exposure. We explored the effects of a common herbicide (atrazine and alachlor) and fertilizer (urea) tan...
Advancements in mitigating interference in quantitative polymerase chain reaction (qPCR) for microbial water quality monitoring (JOURNAL)
The United States Environmental Protection Agency's (EPA)1 2012 Recreational Water Quality Criteria included an Enterococcus spp. quantitative polymerase chain reaction (qPCR) method as a supplemental indicator-method. In 2012, performance of qPCR for beach monitoring remained li...
Decontamination of Bacillus Spores from Drinking Water Infrastructure with Physical Removal (Pigging) (PUBLISHED REPORT)
This report summarizes the results of biological decontamination experiments performed at the WSTB focused on removing Bacillus globigii spores adhered to the inner surface of the 8-inch water pipe. B. globigii spores are a non-pathogenic surrogate for B. anthracis, which is the...
Quantifying hydraulic and water quality uncertainty to inform sampling of drinking water distribution systems (JOURNAL)
Sampling of drinking water distribution systems is performed to satisfy regulatory requirements but also to respond to customer complaints or emergency situations. Water distribution system modeling techniques can be used to plan and inform sampling strategies; however, a high de...
A Measurement‐Model Fusion Approach for Improved Wet Deposition Maps and Trends (JOURNAL)
Air quality models provide spatial fields of wet deposition (WD) and dry deposition that explicitly account for the transport and transformation of emissions from thousands of sources. However, many sources of uncertainty in the air quality model including errors in emissions and...
Advances in Air Quality Modeling (JOURNAL)
Air quality modeling is of critical importance to inform regulatory and planning activities under the U.S. Clean Air Act (CAA). Due to limitations in spatial and temporal coverage of ambient monitoring networks, air quality models are better able to characterize the ambient impac...
Spatial and temporal dynamics of a freshwater eukaryotic plankton community revealed via 18S rRNA gene metabarcoding (JOURNAL)
DNA metabarcoding is a sophisticated molecular tool that can enhance biological surveys of freshwater plankton communities by providing broader taxonomic coverage and, for certain groups, higher taxonomic resolution compared to morphological methods. We conducted 18S rRNA gene me...