Science & Technology

Memorandum: Tier 3 Toxicity Value White Paper - June 19, 2013

The purpose of this memorandum is to transmit the OSRTI Document entitled "Tier 3 Toxicity Value White Paper

Non-Dioxin-Like PCBs: Effects and Consideration In Ecological Risk Assessment

An estimated one million metric tons of commercial mixtures of polychlorinated biphenyls (PCBs), such as Aroclors (USA), Kanechlors (Japan) and Clophens (Germany), were manufactured (WHO, 1993) and used worldwide as dielectric fluids

Transmittal of Interim Bulletin Volume 1, Number 1 "Supplemental Guidance to RAGS: Calculating the Concentration Term", June 22, 1992

A quality action team (QAT) was initiated at the annual Superfund Risk Assessment Meeting in March, 1991, specifically to address the problem of calculating the concentration term for use in Superfund exposure assessment.

Transmittal of Policy Statement: "Role of Background in the CERCLA cleanup program"

Draft versions of this policy were distributed for internal review and comment in January 2001 and August 2001.

Guidance for Data Useability in Risk Assessment (Part B-6), Final, May, 1992

This chapter discusses the application of radioanalytical data for risk assessment. Guidance is provided for reviewing data for consistency and completeness

Section 3 - Exposure assessment and risk descriptors

The results of a risk assessment are usually communicated to the risk manager in the risk characterization portion of the assessment.

EPA Science Matters Newsletter: Helping an Ally, and Learning from Disaster

EPA homeland security research helps Japan in the aftermath of the devastating earthquake, tsunami, and radiation leak.

EPA Science Matters Newsletter: MCnest: Not Just for the Birds (Published January 2014)

Learn about the Markov Chain Nest Productivity Model (MCnest), a model that estimates the potential impact of pesticide exposures on the reproductive success of bird populations.

Sourcing Urban Soil Contaminants to Improve Cleanup

A science matters story on Urban background contaminants

EPA Researchers Share Lessons Learned from Citizen Science Research Projects

FAQs about citizen science EHAs

Meet ORISE Research Fellow Nisha S. Sipes, Ph.D.

Nisha S. Sipes is an ORISE Research Fellow in EPA’s innovative National Center for Computational Toxicology. She and her colleagues are changing the way toxicity testing is done by researching ways to make it faster, more efficient, and more informative

The Cyanobacteria Assessment Network – Recent Success in Harmful Algal Bloom Detection

EPA scientists and partners are improving harmful algal bloom detection through the use of satellite imagery.

Science Matters Articles related to Sustainability Research

Find published Science Matters articles about the EPA's sustainability and green practices research.

Modeling Research Shows How Salty Ocean Air Impacts Ozone Pollution

Did you know that salty air from the ocean’s surface can help to reduce ozone air pollution, particularly in coastal areas?

EPA Projects Aim to Improve Ozone Models Over Long Island Sound

EPA scientists are using data from a 2018 study with partners where they collected air quality data to investigate ozone formation over the ocean and transport across Long Island Sound to improve air quality models.

Ecological Risk Assessment Guidance for Superfund: Process for Designing and Conducting Ecological Risk Assessments, Steps 1-4, June, 1997

Step 1 is the screening-level problem formulation process and ecological effects evaluation (highlight 1-1 defines screening-level risk assessments)

Guidance on Risk Characterization for Risk Managers and Risk Assessors

This memorandum provides guidance for managers and assessors on describing risk assessment results in EPA reports, presentations, and decisions packages.

Guidelines for Exposure Assessment

1992 final guidelines for exposure assessment.

Issuance of Final Guidance: Ecological Risk Assessment and Risk Management Principles for Superfund Sites, October 7, 1999

This guidance is intended to help Superfund risk managers make ecological risk management decisions that are based on sound science, consistent across Regions, and present a characterization of site risks that is transparent to the public.

Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual Supplemental Guidance

This guidance supplements the Risk Assessment Guidance for Superfund: Human Health Evaluation Manual, Part A that was issued October 13, 1989.