Science & Technology
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Electrical Resistivity
Surface electrical resistivity surveying is based on the principle that the distribution of electrical potential in the ground around a current-carrying electrode depends on the electrical resistivities and distribution of the surrounding soils and rocks.
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IRIS Recent Additions
Users can find notifications of detailed changes to IRIS website over the years.
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IRIS Program Outlook
This page describes assessments that are in development and projected public milestone dates.
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Prioritization of Toxics in the Columbia River
List of highest priority toxic contaminants in the Columbia River.
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Designation and NAAQS Information Related to the 1-Hour Ozone (1979 Standard) - NAAQS Revoked
Designation and NAAQS Information Related to the 1-Hour Ozone (1979 Standard) - NAAQS Revoked
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Green Book Frequent Questions
Green Book Frequently Asked Questions
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Near Road Monitoring
Information on the near road monitoring network
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Community-Scale Air Toxics Ambient Monitoring (CSATAM)
Webpage for the PAMS monitoring network containing information on background, methods, QA, and other resources.
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From Brownfield to Breadbasket: Health Impact Assessments Help Communities Make Healthy Decisions
PA is helping officials in Dover, Delaware, make decisions about the site by conducting a rapid Health Impact Assessment, an approach for identifying how a proposed policy or project might impact the health of a community.
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Meet EPA Environmental Engineer Terra Haxton, Ph.D.
EPA Environmental Engineer Terra Haxton, Ph.D., uses computer simulation models to protect drinking water. She investigates approaches to help water utilities be better prepared to respond to contamination incidents in their distribution systems.
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Meet EPA Research Physical Scientist Vasu Kilaru
EPA's Vasu Kilaru works to safeguard the public’s health from the negative effects of air pollution.
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Meet EPA Research Chemist Angela Batt, Ph.D.
EPA Chemist Angela Batt describes her background, when she first wanted to be a scientist, what super power she would want, and more in this researchers at work profile!
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Meet EPA Researcher Vito Ilacqua, Ph.D.
This is the researchers at work profile for Dr. Vito Ilacqua. Learn about his background, current research, and advice for students in this profile.
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Coast-to-Crest Monitoring Network – Data in Demand
EPA researchers are working with partners to investigate causes of tree mortality in the Pacific Northwest over time.
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Nitrogen Footprint Tool: Reducing Nitrogen at the Institutional Level
Science Matters article about the nitrogen footprint tool
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Meet EPA Genetic Toxicologist Catherine Gibbons, Ph.D.
EPA genetic toxicologist Catherine Gibbons, Ph.D., investigates the impact of chemicals on genetic material for EPA’s National Center for Environmental Assessment.
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EPA Researchers use AI to Mimic Human Behaviors that Could Affect our Exposure to Chemicals
Where and how we spend our time plays a major role in the types of chemicals we’re exposed to each day. EPA scientists need to understand these exposures before assessing a chemical’s potential risk to human health.
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EPA Tools Help Local Decision-Makers Deal with Waste Resulting from Major Natural Disasters
Following a natural disaster, communities can face an unexpected challenge: what to do with the tons of waste and debris left behind.
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New EPA Citizen Science Quality Assurance Handbook Provides Best Practices for Citizen Science Projects
To help citizen scientists improve data quality, EPA has created a new Quality Assurance handbook to be used with accompanying templates and examples for citizen science.
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Scaling Back: EPA Researchers Help Communities Protect Drinking Water Systems from Lead
EPA researchers are leading research to better understand the dynamics of water chemistry, treatment, and infrastructure to help facility managers and local communities keep lead out of drinking water.