Science & Technology

Numerical analysis of fracture propagation during hydraulic fracturing operations in shale gas systems

Researchers used the TOUGH+ geomechanics computational software and simulation system to examine the likelihood of hydraulic fracture propagation (the spread of fractures) traveling long distances to connect with drinking water aquifers.

Overview of Chronic Oral Toxicity Values for Chemicals Present in Hydraulic Fracturing Fluids, Flowback and Produced Waters

as part of EPA's Hydraulic Fracturing Drinking Water Assessment, EPA is summarizing existing toxicity data for chemicals reported to be used in hydraulic fracturing fluids and/or found in flowback or produced waters from hydraulically fractured wells

ALOHA Software

Part of the CAMEO suite, ALOHA® is an atmospheric dispersion model used for evaluating releases of hazardous chemical vapors, including toxic gas clouds, fires, and explosions.

Hazardous Air Pollutants' Fact Sheet Chemical Cross Reference

Health and Environmental Effects of Hazardous Air Pollutants

What are the health and environmental effects of hazardous air pollutants?

Documentation for 2023 Reference Case

On this page you will find documentation about EPA’s Platform v6 assumptions, updates, changes, and enhancements, including the full support document as well as additional tables and attachments.

Lower Building Energy Demands

Information and resources on how green infrastructure can help lower building energy demands.

EPA Region 3 Data Validation

An overview of how Region 3 handles data validation. This includes a table illustrating how old validation levels correspond to the new levels.

Guidance for Thyroid Assays in Pregnant Animals, Fetuses and Postnatal Animals, and Adult Animals

This study may be done in place of a rat DNT study for thyroid disrupting chemicals. This special study is intended to provide LOAEL or NOAEL to derive RfDs to be protective of thyroid development in pregnant women, fetuses or newborns.

EPA Calls for Nominations of Peer Reviewers for Draft Risk Evaluation of the Solvent 1,1-DCA

EPA is calling for nominations of scientific experts to serve as letter peer reviewers of the Draft Risk Evaluation for 1,1-Dichloroethane (1,1-DCA). Nominations are due April 11, 2024.

Final Risk Evaluation for C.I. Pigment Violet 29

PF for PV29

Risk Evaluation for C.I. Pigment Violet 29

Documents for PV-29

Standard Evaluation Procedures (SEPs) and Data Entry Spreadsheet Templates (DESTs) for Endocrine Disruptor Screening Program (EDSP) Tier 1 Assays

This page provides information and access to Standard Evaluation Procedures (SEPs) and Data Entry Spreadsheet Templates (DESTs) developed by EPA's Office of Chemical Safety and Pollution Prevention (OCSPP).

About Using Predictive Models and Tools To Assess Chemicals under TSCA

As part of EPA's effort to promote chemical safety, OPPT provides public access to predictive models and tools which can help inform the public on the hazards and risks of substances and improve chemical management decisions.

ECM for Fluoxastrobin & Degradates in Water - MRID 50428701

Environmental Chemistry Methods for Fluoxastrobin & Degradates MRID 50428701

ECM for Cyclaniliprole & Degradate NK-1375 in Soil - MRID 49318914

Environmental Chemistry Methods for Cyclaniliprole & Degradate NK-1375 in Soil - MRID 49318914

Presidential Green Chemistry Challenge: 2016 Academic Award

Presidential Green Chemistry Challenge 2016 award winner, Professor Chirik, discovered a class of catalysts used to produce silicones for consumer goods without using hard-to-mine platinum (less mining, reduces costs, greenhouse gas emissions, and waste).