Health Research Products in the Science Inventory
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MEMBRANE FILTRATION GUIDANCE MANUAL
[Published : Dec 01, 2005]
[Published : Dec 01, 2005]
Manual provides guidance on the selection, design, and operation of membrane filtration to comply with the treatment requirements of the Long Term 2 Enhanced Surface Water Treatment Rule (LT2 ESWTR).
Integrating network analysis of historical targeted and emerging non-targeted concentration data with population and environmental indicators for intelligent sampling design
(PRESENTATION) [Presented : Mar 20, 2025]
(PRESENTATION) [Presented : Mar 20, 2025]
Environmental surveillance data provide gold-standard information for informing regulatory decisions related to chemical pollution. However, these data are expensive and time consuming to generate. Strategies are needed for the selection of optimal sampling locations and measured...
The role of phase-state for deposition of per- and polyfluoroalkyl substances (PFAS)
(PRESENTATION) [Presented : Oct 07, 2022]
(PRESENTATION) [Presented : Oct 07, 2022]
Per- and polyfluoroalkyl substances (PFAS) are a class of man-made compounds whose emissions to air may contribute, via transport and deposition, to concentrations in surface water, ground water, and private well water in the vicinity of large point sources. Air quality modeling ...
2023 Draft Supplement to the 1,4-Dioxane Risk Evaluation
(ASSESSMENT DOCUMENT) [Published : Nov 03, 2024]
(ASSESSMENT DOCUMENT) [Published : Nov 03, 2024]
1,4-Dioxane was one of the first 10 chemical substances undergoing the TSCA risk evaluation process after passage of the Frank R. Lautenberg Chemical Safety for the 21st Century Act, which amended TSCA in 2016. The 2023 Draft Supplement includes evaluation of additional conditio...
Transformation of per-and polyfluoroalkyl substances during onsite septic system treatment
(PRESENTATION) [Presented : Dec 18, 2024]
(PRESENTATION) [Presented : Dec 18, 2024]
Approximately 25% of homes in the United States treat their wastewater using on-site septic systems rather than centralized wastewater treatment plants. Innovative/alternative (I/A) septic systems have been designed to reduce the amount of nutrients released into the environment....
Application of systematic evidence mapping to assess the impact of new literature when updating health reference values: A case example using Uranium
(PRESENTATION) [Presented : Sep 11, 2024]
(PRESENTATION) [Presented : Sep 11, 2024]
Systematic evidence mapping (SEM) provides a transparent and methodologically rigorous approach for compiling the available evidence to assess potential human health hazards. The objective of this analysis is to evaluate the applicability of evidence mapping to determine whether ...
Evaluation of a Solidification/Stabilization Process for PFAS Contaminated Soils
(PRESENTATION) [Presented : Oct 30, 2024]
(PRESENTATION) [Presented : Oct 30, 2024]
A two-phased bench-scale study involved the evaluation of various sorbents for possible use as stabilizing agents as an in-situ solidification/stabilization (immobilization) treatment process for PFAS contaminated soils. The first phase involved sorption experiments for fiv...
Contribution of Condensed-Phase Hydrolysis to Atmospheric Production of GenX
(PRESENTATION) [Presented : Oct 25, 2024]
(PRESENTATION) [Presented : Oct 25, 2024]
Per- and polyfluoroalkyl substances (PFAS) are a class of human-made compounds that can be emitted to the atmosphere, transported downwind, and deposited where they may contaminate surface water, ground water, and private well water, especially in the vicinity of large point sour...
Update on the AQMEII4 Deposition Modeling Intercomparison
(PRESENTATION) [Presented : Nov 15, 2024]
(PRESENTATION) [Presented : Nov 15, 2024]
This talk will provide an update on the status of research performed under Phase 4 of the Air Quality Model Evaluation International Initiative (AQMEII) by more than 10 research groups from North America and Europe. The focus of this initiative is on analyzing deposition of trace...
Identifying the Largest Nutrient Input Sources for HUC8 Sub-basins across the United States
(PRESENTATION) [Presented : Jul 08, 2022]
(PRESENTATION) [Presented : Jul 08, 2022]
Nutrient pollution is among the most significant and costly environmental challenges for protecting and improving surface water and ground water quality. Limited resources need to be leveraged efficiently and effectively to prioritize watersheds for restoration and man...
Lead brownfields and birth defects in North Carolina 2003–2015: A cross-sectional case–control study
(JOURNAL) [Published : Aug 13, 2024]
(JOURNAL) [Published : Aug 13, 2024]
This subproduct examines associations between proximity to lead contaminated brownfields and specific birth defects and groups of birth defects, advancing knowledge on these connections and building pathways in which remediation and restoration of these sites could provide benefi...
Peer Review for EPA’s Biologically Based Dose-Response (BBDR) Model for Perchlorate
(CRITERIA DOCUMENT) [Published : Mar 29, 2017]
(CRITERIA DOCUMENT) [Published : Mar 29, 2017]
EPA is developing a regulation for perchlorate in drinking water. As part the regulatory process EPA must develop a Maximum Contaminant Level Goal (MCLG). FDA and EPA scientists developed a biologically based dose-response (BBDR) model to assist in deriving the MCLG. This mode...
Peer Review for EPA’s Proposed Approaches to Inform the Derivation of a Maximum Contaminant Level Goal for Perchlorate in Drinking Water
(PUBLISHED REPORT) [Published : Mar 29, 2018]
(PUBLISHED REPORT) [Published : Mar 29, 2018]
EPA is developing approaches to inform the derivation of a Maximum Contaminant Level Goal (MCLG) for perchlorate in drinking water under the Safe Drinking Water Act. EPA previously conducted an independent, external, scientific peer review of the draft biologically-based dose-res...
Groundwater and Surface Water Interaction
(PRESENTATION) [Presented : Apr 24, 2024]
(PRESENTATION) [Presented : Apr 24, 2024]
For many coastal areas around the Puget Sound, the interplay between weather, surface water, soils, evapotranspiration and groundwater flows is critical to modeling stream flow and predicting quantity and timing of flows under climate change. In this presentation, we introduce an...
COMPATIBILITY OF BENTONITE AND DNAPLS
(JOURNAL) [Published : Mar 31, 1999]
(JOURNAL) [Published : Mar 31, 1999]
The compatibility of dense non-aqueous phase liquids (DNAPLs), trichloroethylene (TCE), methylene chloride (MC), and creosote with commercially available sodium bentonite pellets was evaluated using stainless steel, double-ring, falling-head permeameters. The Hydraulic conductiv...
What's holding geophysics back
(PRESENTATION) [Presented : Mar 29, 2024]
(PRESENTATION) [Presented : Mar 29, 2024]
Several questions and uncertainties hinder widespread applications of geophysical methods for environmental and groundwater investigations. This contribution identifies three main impediments to the application of geophysics for environmental and groundwater investigations and pr...
Effects-based bioassay screening approaches applied to residential tapwater to inform consumer point-of-use decisions
(PRESENTATION) [Presented : Nov 15, 2023]
(PRESENTATION) [Presented : Nov 15, 2023]
Effects-based bioassays are expeditious and economic non-targeted chemical analysis tools frequently used in preliminary stages of water quality monitoring efforts, or as part of effects-directed analysis. Using in vitro effects-based methods, we previously detected biological ac...
Composition of active bacterial communities and presence of opportunistic pathogens in disinfected and non-disinfected drinking water distribution systems in Finland
(JOURNAL) [Published : Jan 01, 2024]
(JOURNAL) [Published : Jan 01, 2024]
Many factors, including microbiome structure and activity in the drinking water distribution system (DWDS), affect the colonization potential of opportunistic pathogens. The present study aims to describe the dynamics of active bacterial communities in DWDS and identify the facto...
LOSS/GAIN OF VOCS FROM TEDLAR BAGS AND OTHER SAMPLING EQUIPMENT
(PRESENTATION) [Presented : Mar 22, 2007]
(PRESENTATION) [Presented : Mar 22, 2007]
Soil gas samples are collected to evaluate human health risk from vapor intrusion into homes and other buildings. In order to meet risk assessment goals, the analytical reporting limit for many compounds of concern are down to part per billion ranges. The appropriate sampling t...
Development of a Cost Effective 1,4-Dioxane Treatment System for Small Community Water Supplies
(PUBLISHED REPORT) [Published : Nov 15, 2023]
(PUBLISHED REPORT) [Published : Nov 15, 2023]
1,4-dioxane is a likely human carcinogen and has been found in groundwater and drinking water supplies throughout the United States. Historically, 90% of 1,4-dioxane production was used as a stabilizer in chlorinated solvents, such as 1,1,1-trichloroethane (TCA). The physical and...
Energy efficient vortex-enhanced water evaporation technology for concentrated brine management: Theory and process simulation evaluation
(JOURNAL) [Published : Jan 15, 2022]
(JOURNAL) [Published : Jan 15, 2022]
Desalination drinking water systems and industrial processes generating high salinity streams require practical brine management options for disposal and/or treatment. Treatment most often involves large capacity brine concentrating processes, on the order of 2000 m3/day, that r...
Development of a U.S. EPA method for the analysis of select pesticides and fungicides in drinking water by solid phase extraction and LC/MS/MS
(PRESENTATION) [Presented : Aug 17, 2023]
(PRESENTATION) [Presented : Aug 17, 2023]
The U.S. Environmental Protection Agency’s (EPA) Office of Groundwater and Drinking Water (OGWDW) through the Office of Water (OW) is responsible for protecting the nation’s drinking water from known and emerging contaminants. Historically, OGWDW has used the Drinking...
A CATALOG OF GROUND WATER FLOW SOLUTIONS FOR PLUME DIVING CALCULATIONS
(PUBLISHED REPORT) [Published : Oct 04, 2007]
(PUBLISHED REPORT) [Published : Oct 04, 2007]
This report focuses on the problem of diving plumes, a term which generally refers to plumes that go deeper into aquifers with distances from their sources. This document presents the mathematical basis of software for real-time development and refinement of site conceptual model...
Reducing Nitrogen in Ground Water Through Enhanced Onsite Wastewater Treatment and Wetland Restoration.
(PRESENTATION) [Presented : Jul 27, 2023]
(PRESENTATION) [Presented : Jul 27, 2023]
Invited "mini" science presentation for the National EPA-Tribal Science Council Summer 2023 Meeting, co-hosted by the Santee Sioux Nation of Nebraska and the Ponca Tribe of Nebraska. They identified nutrients, groundwater, wetlands and wastewater treatment as issues of ...
Effects-based tools to support consumers in tapwater use decisions: A multi-case study summary
(PRESENTATION) [Presented : Apr 25, 2023]
(PRESENTATION) [Presented : Apr 25, 2023]
ABSTRACT: We previously detected biological activity, indicative of endocrine disrupting compounds, in surface and source waters. However, the paucity of chemical contaminant occurrence data in unmonitored private-supply point-of-use (POU) tapwater, as well as the potential for u...