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The use of air sensors continues to grow for a variety of air monitoring applications. However, the data quality still remains highly variable. In 2021, the U.S. EPA published reports outlining recommended testing protocols to evaluate the performance of fine particulate matter a...

The use of air sensors continues to grow for a variety of air monitoring applications. However, the data quality still remains highly variable. In 2021, the U.S. EPA published reports outlining recommended testing protocols to evaluate the performance of ozone air sensors for non...

This report documents the results of an interagency project to sample emissions from in situ oil burns, comparing ground-based particulate matter measurements with measurements by aerial unmanned aircraft system (UAS). A sensor/sampler system from the Environmental Protection Age...

Accurate determination of NAAQS pollutant concentrations requires efficient sampling and transport of the pollutants to their respective samplers for quantitative analysis. For reactive gas sampling, Section 9 of Appendix E of 40 CFR Part 58 specifies that only borosilicate glass...

The use of air sensors has grown exponentially for a variety of applications; however it is widely known that sensor data quality is highly variable. There are currently no standard testing protocols, metrics, or targets to evaluate air sensor performance uniformly. It is recogni...

In January 2020, the Wildland Fire Leadership Council (WFLC) requested that EPA, in collaboration with scientific staff in the U.S. Forest Service (USFS), the Department of the Interior (DOI) and the National Institute of Standards and Technology (NIST), conduct an assessment ...

In the U.S., fugitive emissions (leaks) of VOC and HAPs from process components have traditionally been managed using scheduled manual inspection of individual components with U.S. EPA Method 21 (M21) as part of facility LDAR programs. Although sensitive and flexible, M21 is reso...

The US Environmental Protection Agency (EPA) has conducted an HIA at the German Gerena Community School in Springfield, MA. HIA is a six-step systematic process that uses an array of data sources, analytic methods and stakeholder input to determine the potential health effects of...

The use of air sensors has grown exponentially for a variety of applications; however it is widely known that sensor data quality is highly variable. There are currently no standard testing protocols, metrics, or targets to evaluate air sensor performance uniformly. It is recogni...

This report updates the findings of the first Report to Congress, published in 2011, with respect to environmental and resource conservation impacts, which together are intended to address the Section 204 statutory impacts since the passage of the EISA. This report reflects the c...

EPA announced the release of the final report,<i>Biofuels and the Environment: First Triennial Report to Congress</i> (EPA/600/R-10/183F), prepared by the National Center for Environmental Assessment (NCEA) within EPA’s Office of Research and Development, as the first EPA report ...

Ultraviolet (UV) Photometry-based ambient Federal Equivalent Method (FEM) ozone (O3) analyzers can experience significant water vapor interferences resulting in increased measurement noise, biased concentration measurements, and slow instrument response times. The magnitude and d...

This report “National Water Infrastructure Adaptation Assessment: Part II, Smart Urban Designer (SUD) and Case Studies” is a part of the research effort undertaken by the EPA Office of Research and Development (ORD) Water Systems Division (WSD) on national water infrastructure as...

Climate change and air pollution are arguably the most significant environmental problems facing the United States and the world over the next decade. There is an urgent need to dramatically curtail emissions of greenhouse gases, including powerful short-lived forcers such as met...

EPA Method TO-15A compiles in a single document the best practices and lessons learned by users of the method over the past 20 years. It has been totally rewritten to address and incorporate improvements in canister, sampling, preconcentration, and analytical instrumentation tec...

This report describes the state of the science with respect to total Nr deposition budgets in the United States and the research needed to improve these budgets from both a measurement and modeling perspective. The document is intended to serve as a roadmap for research activiti...

Responding to an accident, fire, or deliberate chemical release can potentially expose first responders to harmful levels of toxic or corrosive chemicals. Additionally, following a contaminant release indoors, it is essential to protect the public health and provide a clearance ...

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...

Fine particulate matter of aerodynamic diameter 2.5 m or less (PM-2.5) has been found harmful to human health, and a National Ambient Air Quality Standard for PM-2.5 was promulgated by the U.S. Environmental Protection Agency in July 1997. A national network of ambient monitorin...

Fine particulate matter of aerodynamic diameter 2.5 m or less (PM-2.5) has been found harmful to human health, and a National Ambient Air Quality Standard for PM-2.5 was promulgated by the U.S. Environmental Protection Agency in July 1997. A national network of ambient monitorin...

Fine particulate matter of aerodynamic diameter 2.5 m or less (PM-2.5) has been found harmful to human health, and a National Ambient Air Quality Standard for PM-2.5 was promulgated by the U.S. Environmental Protection Agency in July 1997. A national network of ambient monitorin...

Active soil-gas sampling has been used as a reconnaissance method in support of soil and groundwater sampling of volatile and biodegradable organic compounds for over 30 years. More recently, soil gas sampling has been used directly to evaluate risk posed by vapor migration from ...

The information in this document is from a collaborative effort between the U.S. EPA, Region 6 Superfund Division and the Office of Research and Development, National Risk Management Research Laboratory. Research was conducted at the US EPA Region 6 Addison Texas Facility. The fi...

Following the collapse of the World Trade Center towers on September 11, 2001, New York State and Federal agencies initiated numerous air monitoring activities to better understand the ongoing impact of emissions from the disaster. This report focuses on these air measurement da...

This paper addresses United States Environmental Protection Agency (EPA) operational and research challenges for the next decade in the utilization of space-based observations for the assessment of terrestrial properties affecting land, water, and air resources, and human health....