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By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) announced on November 10, 2022, that it is requesting nominations of prospective candidates for membership on the Science Advisory Committee on Chemicals (SACC) established under the Toxic Substances Control Act (TSCA). 87 Fed. Reg. 67898. Any interested person or organization may nominate qualified persons to be considered for appointment to the SACC. Individuals may also self-nominate. Nominations are due December 12, 2022.
 
SACC serves as a scientific peer review mechanism of EPA’s Office of Chemical Safety and Pollution Prevention (OCSPP). According to EPA, SACC provides independent scientific advice and recommendations to EPA on the scientific basis for risk assessments, methodologies, and pollution prevention measures and approaches for chemicals regulated under TSCA. Currently, there are 17 SACC members, with eight membership terms that will expire over the next year.
 
EPA states that its “rigorous scientific peer review processes ensure all Agency decisions are founded on credible science and data. Science provides the foundation for EPA policies, actions and decisions made on behalf of the American people.”
 
To be considered, all nominations should include the following information:

  • Current contact information for the nominee (including the nominee’s name, organization, current business address, e-mail address, and daytime telephone number);
  • The nominee’s disciplinary and specific areas of expertise;
  • Research activities;
  • Recent service on other federal advisory committees and national or international professional organizations; and
  • When available, a biographical sketch of the nominee, indicating current position and educational background.

EPA states that it is seeking nominations from individuals who have demonstrated high levels of competence, knowledge, and expertise in scientific and other technical fields relevant to chemical safety and risk assessment. EPA seeks nominees with expertise in a variety of disciplines and focus areas, including human health and ecological risk assessment, biostatistics, epidemiology, pediatrics, physiologically based pharmacokinetics (PBPK), toxicology and pathology (including neurotoxicology, developmental/reproductive toxicology, and carcinogenesis), and chemical exposure pathways to susceptible life stages and subpopulations (women, children, and other potentially exposed subpopulations).
 
EPA states that nominees should have backgrounds and experiences that would contribute to the diversity of scientific viewpoints on the committee -- including professional experiences in government, labor, public health, public interest, animal protection, industry, and other groups -- and as the EPA Administrator determines to be advisable (e.g., geographical location; social and cultural backgrounds; and professional affiliations).


 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency’s (EPA) New Chemicals Program will host a webinar on October 18, 2022, on EPA’s process for assessing the potential risks of new chemicals under Section 5 of the Toxic Substances Control Act (TSCA) and the types of data EPA considers in this assessment. The webinar will cover examples of quantitative and qualitative data unlikely to be accepted for engineering assessment, considerations EPA makes when evaluating data, and clarifications of common misconceptions in EPA’s new chemical assessments.
 
As reported in our June 27, 2022, memorandum, in June 2022, EPA announced a broad outreach effort to describe to stakeholders how EPA evaluates engineering data (i.e., data related to environmental release and worker exposure) provided for new chemical submissions and common issues that cause EPA to have to reconduct risk assessments (“rework”). The goal of this effort is to prevent delays of EPA’s new chemical reviews caused by rework.
 
This will be the second in a series of webinars intended to increase the efficiency and transparency of EPA’s new chemical determinations. As reported in our July 28, 2022, memorandum, in July 2022, EPA hosted the first webinar, analyzing common issues that cause EPA to have to rework risk assessments. Meeting materials are available for those who missed the first webinar.


 

By Lynn L. Bergeson and Carla N. Hutton

The U.S. Environmental Protection Agency’s (EPA) New Chemicals Program held a webinar on July 27, 2022, to provide an in-depth look at its analysis of common issues that cause EPA to have to reconduct risk assessments (“rework”) of new chemicals. In June 2022, EPA announced a broad outreach effort to describe and to discuss with stakeholders how EPA evaluates engineering data (i.e., data related to environmental release and worker exposure) provided for new chemicals submissions under the Toxic Substances Control Act (TSCA) and common issues that cause EPA to have to rework risk assessments for these submissions. EPA has posted the meeting slides online.
 
During the webinar, EPA presented an example of a rework case. According to EPA, from its analysis, it observes that:

  • Information on material balance parameters, environmental releases, environmental release media, and engineering controls cause nearly 80 percent of all rework;
     
  • In most cases, companies provide additional information that deviates from EPA model defaults and assumptions; and
     
  • Companies often lack understanding on what information is needed for a Section 5 engineering assessment, including the level of detail needed to support their statements relating to environmental release and worker exposure.

As noted in the meeting slides, EPA plans to hold two additional webinars in fall 2022 that will cover:

  • How EPA evaluates quantitative and qualitative information, with examples on the level of detail needed to support the submitted information to be accepted by EPA; and
     
  • The types of information commonly missing in Section 5 submissions, how EPA evaluates environmental release information on sites not controlled by the submitter, and their impact on engineering assessment.

More information is available in our July 28, 2022, memorandum.


 

By Lynn L. Bergeson and Carla N. Hutton

On March 23, 2022, the U.S. Environmental Protection Agency (EPA) held a webinar on “Biofuel Premanufacture Notices: New Chemical Risk Assessment and Applications of Tools and Models.” As reported in our January 24, 2022, blog item, in January 2022, EPA announced an effort to streamline the review of new biobased or waste-derived chemicals that could displace current, higher greenhouse gas (GHG)-emitting transportation fuels. EPA states that to support this effort, it is offering outreach and training to stakeholders interested in biofuels. According to EPA, the bi-weekly webinar series includes reviewing requirements under the Toxic Substances Control Act (TSCA), outlining the streamlined approaches for risk assessments and risk management actions, and providing information on how to navigate the new chemicals premanufacture notice (PMN) process. EPA provided background and outlined the following challenges for each risk assessment conducted:

  • Chemistry Assessment:
    • Fuel stream and related substances are broad in number and scope, especially with the addition of current biobased and waste feedstock blends; they can be class 1, class 2, or chemical substances of unknown or variable composition, complex reaction products, and biological materials (UVCB) substances;
    • Many petroleum-derived fuel streams are on the original TSCA Inventory and there are very little data associated with them; and
    • Complete characterization of the new chemical substance is often unavailable;
  • Environmental Fate and Transport Assessment:
    • Analysis of constituents may not represent the properties of the new chemical substance;
  • Engineering Assessment: Environmental Releases:
    • EPA’s release assessment analyzes each manufacturing, processing, and use operation and determines the sources/activities that can result in releases to the environment. These release estimates are used to estimate exposure estimates for ecological and human receptors;
    • Examples of release data: (1) Measured release data; (2) Measured release data for a “surrogate” chemical; (3) Modeled release estimates; and
    • Release estimates have limitations -- examples:
      • Lack of appropriate model/method to estimate releases from specific industrial activities (e.g., storage tank emissions); and
      • Limitation in certain release models (e.g., limited to a vapor pressure threshold of 35 torr);
  • Engineering Assessment: Occupational Exposures:
    • The occupational exposure assessment estimates the magnitude, frequency, and duration of exposures to the new chemical substance at the workplace;
    • Worker inhalation and dermal exposures are expected throughout the lifecycle of the new chemical substance (e.g., manufacturing, processing, use); and
    • Exposure models do not account for some engineering controls (vapor capture/reduction);
  • Exposure Assessment: General Population and Consumer Exposures:
    • The occupational exposure assessment estimates the magnitude, frequency, and duration of exposures to the new chemical substance for the general population and consumers via inhalation and drinking water pathways; and
    • The confidence of the exposure estimates are affected by:
      • Assumptions, limitations, and areas of uncertainty in the fate and engineering analyses; and
      • Inherent uncertainties of the exposure parameters and assumptions for the estimation of the general population and consumer exposures;
  • Hazard Assessment:
    • Data on the new chemical substance or an analogous biofuel are preferred, but few submissions include toxicological or composition data;
    • EPA often lacks acute/chronic environmental test data on the new chemical substance and the analogous substances; and
    • There are challenges in performing read-across approaches and route-to-route extrapolations with analogous substances of variable composition.

For biofuel PMNs, EPA has started generating one report that combines the results of each of the above assessments. The final webinar in the series will be held April 6, 2022, on new chemicals risk management actions, including TSCA Section 5 orders and significant new use rules (SNUR).


 

By Lynn L. Bergeson

On October 1, 2021, EPA announced a series of virtual meetings of the Board of Scientific Counselors (BOSC) Chemical Safety for Sustainability and Health and Environmental Risk Assessment (CSS HERA) Subcommittee to review recent progress and activities of the Chemical Safety Analytics (CSA) and Emerging Materials and Technologies (EMT) research areas. Meetings are open to the public, and EPA accepted comments until November 3, 2021.

The initial meeting will be held over a two-day period via videoconference on November 4 and 5, 2021, 12:00 p.m. to 5:00 p.m. (EDT). Registration was required by November 3, 2021. The following meetings are also scheduled:

  • BOSC Deliberation Videoconference: November 18, 2021, 11:00 a.m. to 2:00 p.m. (EST) -- Registration is required by November 17, 2021.
  • Final BOSC Deliberation Videoconference: December 10, 2021, 11:00 a.m. to 2:00 p.m. (EST) -- Registration is required by December 9, 2021.

Meeting times are subject to change.


 

By Lynn L. Bergeson

On April 29, 2020, the U.S. Environmental Protection Agency’s (EPA) Office of Research and Development (ORD) announced a virtual meeting of the Board of Scientific Counselors (BOSC) Chemical Safety for Sustainability and Health and Environmental Risk Assessment (CSS-HERA) Subcommittee. The purpose of the meeting will be to review the draft 2019-2022 Strategic Research Action Plan (StRAP) of the HERA research program. The videoconference meeting will be held over a period of two days on May 12, 2020, from 12:30 p.m. to 5:00 p.m. (EDT), and May 13, 2020, from 12:30 p.m. to 5:00 p.m. (EDT). The meeting is open to the public. Those interested in participating must register by May 8, 2020.


 

By Lynn L. Bergeson

On September 3, 2019, the Chinese Ministry of Ecology and Environment (MEE) and National Health Commission (NHC) jointly issued a final Technical Framework Guideline for Environmental Risk Assessment of Chemical Substances (Trial). This Trial Guideline provides a basic framework, including evaluation steps, technical requirements, and report preparation, for the environmental risk assessment of a single chemical substance under standard production and uses. The Trial Guideline does not apply to mixtures or exposures due to accidents or leakages. The “four-step” evaluation includes hazard identification, dose-response assessment, exposure assessment, and risk characterization. It also outlines uncertainty analysis, data quality assessment, spatial scale of exposure assessment, risk assessment of persistent, bioaccumulative, and toxic (PBT) and very persistent and very bioaccumulative (vPvB) chemical substances, and consideration for risk assessment of metals and their compounds. For further details, see The ACTA Group’s commentary here.