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Analytical methods exist to detect biothreat agents in environmental samples during a response to biological contamination incidents. However, the coastal zone facilities and assets of the United States Coast Guard (USCG), including response boats in diverse geographical areas an...

EPA’s draft document describes the planning and problem formulation steps of cumulative risk assessments (CRAs) and offers guidelines for when such assessments might be appropriate. The document provides recommendations to aid in developing a CRA analysis plan, but they do not pr...

Analytical methods are generally delivered in the form of documents describing the method in terms of analytes which can be studied, supported matrices, reagents, methodological details, statistical performance, interlaboratory validation and other details. Regulatory bodies incl...

The field of non-targeted analysis (NTA) is rapidly advancing due to technological developments supporting high-resolution mass spectrometry. The EPA has been developing software tools to support NTA workflows, and a core aspect of this work has been the delivery of supporting ch...

Analytical methods are generally delivered in the form of documents describing the method in terms of analytes which can be studied, supported matrices, reagents, methodological details, statistical performance, interlaboratory validation and other details. Regulatory bodies incl...

Summary: A life cycle assessment (LCA) and life cycle cost analysis (LCCA) study that estimates environmental impact and cost of operating an existing indirect potable reuse (IPR) system in Gwinnett County, Georgia and compares that impact to two hypothetical direct potable reus...

Measuring soil fauna in stormwater green infrastructure Abstract Stormwater controls in urban environments that use plants are being promoted as green infrastructure. To better understand these controls and relationship to the environment, soil fauna extraction was performed o...

The scientific foundation for per- and polyfluoroalkyl substances (PFAS) measurements in water, soils, sediments, biosolids, biota, and outdoor air has rapidly expanded, however, there are limited efforts devoted to developing analytical methods to measure vapor-phase PFAS in ind...

Plastic particles are found ubiquitously in the environment, and as plastic abundance increases in marine systems, the adverse biological and ecological effects of plastics of various size classes (macro-, micro-, nano-) needs to be evaluated for potential risks. Marine sediments...

Microplastics are ubiquitous in the environment and present potential adverse effects on human and environmental health. EPA's Office of Research and Development is interested in developing sampling and analytical methods for microplastic detection, investigating their effects on...

The normal probability density function (PDF) is widely used in parameter estimation in the modeling of dynamic systems. The values of random variables that obey the normal PDF are distributed at assumed infinite intervals. However, in practice, these random variables are usually...

Biomonitoring data can provide important information about exposure to chemicals in the environment aggregated across all pathways. Depending on the study design, biomonitoring surveys can elucidate population-specific risks, exposure patterns over time, and relationships between...

Limited availability of fish metabolic pathways for PFAS may lead to risk assessments with inherent uncertainties based only upon the parent chemical or the assumption that the biodegradation or mammalian metabolism map data will serve as an adequate surrogate. A rapid and transp...

Consideration of PFAS precursors is necessary in order to close the gap between targeted PFAS analysis and a comprehensive quantification of total PFAS. However, current understanding is limited, and there are many misconceptions and questions: where are PFAS precursors found? Ar...

For the past several years, the Office of Research and Development (ORD), US Environmental Protection Agency (EPA), and the Metropolitan Sewer District of Greater Cincinnati (MSDGC) have been investigating the use of peracetic acid (PAA) as an alternative to chlorination and ultr...

The rising tide of nutrient variance has been applied by small wastewater treatment plants across the country, especially in the rural areas.  This study investigated the potential for small, rural municipalities in Kickapoo watershed located in Southwest Wisconsin to comply with...

New chemical formulations are being tested to replace PFAS-containing fire-fighting foams in several applications, including systems designed to protect aviation fuels, weapons, chemical tankers, and large petroleum tanks. The current efforts are focused on identifying and synthe...

The SCID is a companion document to the SAM document and will need to be updated to match the SAM 2022 document. Revisions continue from STRAP3. Supports ESAM.

Following the SAM update in FY22, and SCID update in FY23, maintenance might be needed on the website that may require contractor support. Restructuring continues from STRAP 3 to get the website and tools more manageable for internal EPA maintenance. Ongoing support for CMS, DMS ...

Acrolein is a well-studied significant constituent of anthropogenic and wildfire smoke emissions and thus, an environmental risk factor contributing to adverse health outcomes. Acrolein is on EPA&rsquo;s priority list of hazardous air pollutants and is a sensory irritant associat...

Current solar panels have an average lifespan of about 25 years. Millions of solar panels installed from the early 2000s are approaching the anticipated end-of-life. There is limited interest in panel recycling, reflecting the relative value of recovered materials, primarily sili...

At least four polyfluorinated organic substances (i.e., 4:2-, 6:2-, 8:2- and 10:2- fluorotelomer alcohols; FTOHs) have sufficient vapor pressure (VP) to be designated as vapor-forming chemicals. Based on current guidance, vapor-forming chemicals warrant investigation for vapor in...

EPA has developed a suite of targeted analytical methods for measurement of PFAS in waters, soils, sediments and biosolids for regulatory and research applications. Quantification at sub part per trillion levels is possible with capable instrumentation, by selection of an appropr...

Assessing the fate of PFAS in the environment requires improved analytical methodologies to quantify a greater variety of PFAS and application of these methods to investigate their occurrence in complex sample matrices. PFAS precursors are a compound class of emerging concern tha...

Life cycle assessment (LCA) has been extensively used to assess the potential environmental impacts of goods and services over their full life cycles.  The traditional environmental impacts in LCA have been focused on impacts of emissions with limited information regarding the im...