Science & Technology
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Fact Sheet - Final Revisions to the 2007 Exceptional Events Rule and Notice of Availability for Related Draft Guidance
On September 16, 2016, the U.S. Environmental Protection Agency (EPA) finalized revisions to the 2007 Exceptional Events Rule to address issues raised by stakeholders and to increase the administrative efficiency of the Exceptional Events Rule process.
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Federal Register Notice – Extension of public comment period to February 3, 2016
On November 20, 2015, the Environmental Protection Agency (EPA) proposed a rule titled, “Treatment of Data Influenced by Exceptional Events.” This document describes the extension of the comment period on the proposed rule.
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Federal Register Notice - Proposed revisions to the Exceptional Events Rule
This Federal Register Notice describes the EPA's proposed revisions to certain sections within the regulations that govern the exclusion of event affected air quality data from regulatory decisions.
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Response to Comments Document for 2016 rule revisions
This Response to Comments (RTC) document presents the Environmental Protection Agency’s (EPA) responses to public comments received on the proposal notice to revise the Exceptional Events Rule (80 Federal Register (FR) 72840; November 20, 2015).
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Federal Register Notice – Final Revisions to the Exceptional Events Rule
This final rule contains definitions, procedural requirements, requirements for air agency demonstrations, criteria for the EPA’s approval of the exclusion of event-influenced air quality data and requirements for air agencies.
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Development of Innovative Approaches to Assess the Toxicity of Chemical Mixtures Research Grants
EPA awarded $7M in research funding to 11 institutions to develop and evaluate innovative methods and approaches to inform human health risk assessment of environmental chemical mixtures.
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Water Quality Portal Quick Reference Guide
This page includes a description of the Water Quality Portal Quick Reference Guide and documentation tables for the WQX 2.0, 3.0, and WQP outbound fields and data profiles.
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Superfund Climate Resilience: Vulnerability Assessment
Learn about Superfund Vulnerability Assessments, climate resilience efforts that seek to evaluate a site remedy's exposure and sensitivity to climate and weather hazards of concern.
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Superfund Hazard Ranking System Training Course
Learn about the Superfund Hazard Ranking System Training Course, a 4.5 day intermediate-level course designed for personnel tasked to compile, draft, and review preliminary assessments (PAs), site inspections (SIs), and HRS documentation.
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HRS Subsurface Intrusion (SsI) Training Modules
Learn about the Hazard Ranking System (HRS) subsurface intrusion (SsI) component through five training modules. These complement the Superfund HRS Training Course.
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IIOAC - Integrated Indoor-Outdoor Air Calculator User's Guide
This user guide provides a more detailed overview of the IIOAC model, equations used to estimate air concentratoin and deposition from point and area sources in industrial facilities and water and soil sources. Rationale for defaults is also explained.
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IIOAC - Common Questions and Answers
These are potential questions and answers from the users of the IIOAC.
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IIOAC - Integrated Indoor-Outdoor Air Calculator Getting Started Guide
This getting started guide provides an overview of the conceptual model framework of IIOAC and directions for how to download, install, and get started.
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Presentations at 2013 Pollinator Summit--Best Management Practices and Communication
These presentations cover quality management of treated seeds and education and outreach efforts for reducing exposure of bees to pesticides from the seed coating in corn dust.
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Presentations at 2013 Pollinator Summit--Seed Treatment Group
These presentations cover seed treatment history and quality, formulation assessment, seed coating polymer alternatives, stewardship of neonicotinoids, and how advances in technology can reduce pesticide exposure risks to honey bees.
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Presentations at 2013 Pollinator Summit --Dust Focus Group
These presentations covered pesticide exposure risks posed to honey bees by the dust from planting treated corn seed, and research on reducing dust by means such as talc replacement and standards for planter technology.
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How We Assess Risks to Pollinators
EPA's pollinator risk assessment framework is part of its regulatory decision-making process for all pesticides, relying on a tiered process and focusing on major routes of exposure while distinguishing different types of pesticide treatment.
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Film Permeability Determination Using Static Permeability Cells
The permeability of tarps to soil fumigant pesticides varies depending on the active ingredient chemical: dimethyl disulfide (DMDS), methyl bromide, chloropicrin, or other. The diffusion rate can be represented by the mass transfer coefficient (MTC).
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Help with Chemical Data Reporting: How to Search for Chemicals Subject to Certain TSCA Actions
This document contains instructions on how to identify chemicals that are the subject of certain actions under the Toxic Substances Control Act (TSCA) using the Substance Registry Services (SRS).
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EPA Announces Peer Review of 1,1-Dichloroethane TSCA Risk Evaluation and 1,2-Dichloroethane Hazard Assessment, Calls for Public Comments on Reviewer Candidates
EPA's SACC will peer review the Draft Risk Evaluation for 1,1-Dichloroethane and the draft hazard assessment supporting the draft risk evaluation for 1,2-dichloroethane in 2024. It is currently accepting comments on candidates to serve as ad hoc reviewers.