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TSCA Work Plan Chemicals


April 20, 2015 - EPA released the final TSCA Work Plan Chemical Problem Formulation and Initial Assessment for 1,4-Dioxane. The problem formulation and initial assessment examined likely exposure and hazard scenarios to workers and consumers in order to identify scenarios where further risk analysis may be necessary. The assessment found no risks to the general population from inhalation exposure and low risks to aquatic life. EPA plans to conduct additional risk analysis on potential worker and consumer exposures.

N-Methylpyrrolidone (NMP)

March 23, 2015 - EPA released the final TSCA Work Plan Chemical Risk Assessment for N-Methylpyrrolidone (NMP). The NMP assessment identified acute and chronic health risks to people, particularly pregnant women and women of childbearing age, who who are exposed to paint and coating removal products containing high concentrations of NMP, but those risks could be minimized by using NMP-resistant gloves in well ventilated work areas to reduce exposure.

Toxic Substances Control Act (TSCA) Work Plan

As part of EPA’s chemical safety program, EPA has identified a work plan of chemicals for further assessment under the Toxic Substances Control Act (TSCA).

Originally released in March 2012, EPA's TSCA Work Plan helps focus and direct the activities of its Existing Chemicals Program. The Work Plan was updated in October 2014 (36 pp, 673 kb, About PDF). The changes to the TSCA Work Plan reflect updated data submitted to EPA by chemical companies on chemical releases and potential exposures.

TSCA Work Plan chemical assessments

To date, EPA has released five final risk assessments for TSCA Work Plan chemicals. Learn more about these and the status of other TSCA Work Plan Chemical Assessments.

What Updates Were Made to the TSCA Work Plan?

In 2012, EPA identified 83 chemicals as candidates for assessment under the TSCA Work Plan (11 pp, 77 kb, About PDF).

In October 2014, EPA issued the TSCA Work Plan for Chemical Assessments: 2014 Update (36 pp, 673 kb, About PDF) to reflect updated data submitted to EPA by the chemical industry on chemical releases and potential exposures. This is the first update to the TSCA Work Plan. The new data was submitted in 2012 under TSCA's Chemical Data Reporting or in 2011 as part of the EPA's Toxics Release Inventory reporting. These data were used to update the exposure rankings for the chemicals initially screened as part of the Work Plan. These data were also used to screen ten Action Plan chemicals and two additional chemicals identified by the Agency during EPA’s assessment of flame retardants. The exposure ranking is part of the screening methodology used to develop the Work Plan in 2012 and is described in detail in the Work Plan Methods Document (39 pp., 1.0 mb.) About PDF.

Download the table with information on the chemicals on the TSCA Work Plan for Chemical Assessments: 2014 Update (Excel format).

In the 2014 update, the following chemicals were added:

In the 2014 update, the following Action Plan chemicals were added:

In the 2014 update, one chemical, benzo[a]pyrene is no longer on the list as a separate assessment candidate. It will be evaluated as part of EPA's assessment for creosote.

In the 2014 update, the following chemicals were removed:

The updated TSCA Work Plan contains 90 chemicals.

Read the TSCA Work Plan for Chemical Assessments: 2014 Update (36 pp, 673 kb, About PDF) for the current TSCA Work Plan and more information on why chemicals were deleted or added.

How Were the TSCA Work Plan Chemicals Selected?

After gathering input from stakeholders, EPA developed criteria used for identifying chemicals for further assessment. The criteria focused on chemicals that meet one or more of the following factors:

Using this process, EPA in 2012 identified chemicals in the TSCA Work Plan as candidates for assessment over the next several years, as they all scored high in this screening process based on their combined hazard, exposure, and persistence and bioaccumulation characteristics. In 2014, using new information submitted to the Agency, EPA updated the TSCA Work Plan.

Read the TSCA Work Plan Chemicals Methods Document (39 pp., 1.0 mb.) About PDF for a detailed explanation of the approach the Agency used to identify these chemicals.

Will EPA Consider Chemicals Not on the TSCA Work Plan?

Identification of chemicals as TSCA Work Plan Chemicals does not mean that EPA would not consider other chemicals for assessment and potential management action under TSCA and other statutes. EPA will consider other chemicals if warranted by available information.

EPA will also continue to use its TSCA information collection, testing, and subpoena authorities, including sections 4, 8, and 11(c) of TSCA, to develop needed information on additional chemicals that currently have less robust hazard or exposure data.

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