By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) announced on December 7, 2022, that the final video recording, slide deck, and case study worksheets from the CompTox Chemicals Dashboard virtual training are now available. EPA also announced that the Dashboard recently released a new version (v2.1.1). New features include:

• A new link to an updated set of Help Pages containing new information;
• Ability to visualize structures in Batch Search;
• Ability to filter out chemicals that are structures;
• Moving the chemistry-related data tabs under a single tab;
• reCAPTCHA implementation to ensure continued functionality;
• Updating the Production Volume data;
• Updating the ADME > IVIVE table using the latest HTTK R-package v2.2.1 algorithm; and
• Several bug fixes.

EPA suggests that if users do not see these updates to try clearing the cache.

The recordings and slides from the October 12-13, 2022, EPA New Approach Methods (NAM) Conference are available on the conference web page. Conference topics included:

• Variability and Relevance of Traditional Toxicity Tests;
• Evolution of Validation and Scientific Confidence Frameworks to Incorporate 21st Century Science; and
• Breakout groups discussing Variability of Traditional Toxicity Tests, Relevance of Traditional Toxicity Tests, and Feedback on EPA Scientific Confidence Framework.

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By Lynn L. Bergeson and Carla N. Hutton
 
On August 25, 2022, the U.S. Environmental Protection Agency (EPA) announced that registration was open for the 2022 Conference on the State of the Science on Development and Use of New Approach Methods (NAM) for Chemical Safety Testing. EPA notes that there will be limited availability in person at EPA headquarters in Washington, DC, on October 12-13, 2022, and a virtual option will also be available. Conference topics include:

• Variability and Relevance of Traditional Toxicity Tests;
• Evolution of Validation and Scientific Confidence Frameworks to Incorporate 21st Century Science; and
• Breakout groups discussing Variability of Traditional Toxicity Tests, Relevance of Traditional Toxicity Tests, and Feedback on EPA Scientific Confidence Framework.

EPA asks that attendees register for the NAMs conference before October 7, 2022.
 
On October 18, 2022, EPA will provide training on the Computational Toxicology (CompTox) Chemicals Dashboard, which is part of a suite of databases and web applications developed by EPA to support the development of innovative methods to evaluate chemicals for potential health risks. The computational toxicology tools and data in the Dashboard help prioritize chemicals based on potential health risks. Specifically targeted for decision-makers, the training will provide:

• An overview of the Dashboard content and function;
• Application-oriented use-case demonstrations in the areas of general use, hazard/bioactivity, exposure/absorption, distribution, metabolism, and excretion (ADME)-in vitro to in vivo extrapolation (IVIVE), and chemistry; and
• Opportunities for participatory learning and engagement.

The training will offer information about the latest release of the Dashboard and how it can be used to gather actionable information about chemical properties and risks through case examples, demonstrations, and hands-on exercises. Registration is now open (attendees must register for the training portions individually):

• CompTox Chemicals Dashboard Virtual Training: Session 1 (Presentation and question and answer (Q&A)); and
• CompTox Chemicals Dashboard Virtual Training: Session 2 (Breakout Sessions).

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Bergeson & Campbell, P.C. (B&C^®) is pleased to present “TSCA New Approach Methodologies,” a complimentary webinar featuring Lynn L. Bergeson, Richard E. Engler, Ph.D., James W. Cox, M.S., and Kristie Sullivan, MPH. The 2016 amendments to TSCA require EPA “to reduce and replace” vertebrate animals to the extent practicable, scientifically justified, and consistent with TSCA policies. EPA is also required to “develop a strategic plan to promote the development and implementation of alternative test methods and strategies to reduce, refine, or replace vertebrate animal testing and provide information of equivalent or better scientific quality and relevance for assessing risks of injury to health or the environment of chemical substances or mixtures.”

These are tall orders, and EPA has worked hard to fulfill Congress’s expectations. This webinar will:

• Highlight examples of EPA’s use of non-vertebrate testing strategies, commonly referred to as “new approach methodologies” or NAMs, in its evaluation of new and existing chemical substances under TSCA Sections 5 and 6, respectively;
   
• Provide examples of successful collaborations between EPA and external partners to advance the understanding and use of NAMs for informing regulatory scientific questions;
   
• Provide perspectives from former EPA scientists and non-governmental organization scientists on the types of data needs required to advance the acceptance and use of NAMs over existing vertebrate alternatives; and
   
•  Provide a proposed roadmap for engaging EPA scientists on the types of questions EPA scientists will likely ask when considering proposals for utilizing NAMs as part of regulatory filings.

Register now.

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By Lynn L. Bergeson and Carla N. Hutton

The U.S. Environmental Protection Agency will hold a virtual public meeting April 20-21, 2022, to seek individual input on the proposed Toxic Substances Control Act (TSCA) New Chemicals Collaborative Research Program. 87 Fed. Reg. 10784. In addition, EPA announced the availability of and is soliciting public comment on the draft document entitled “Modernizing the Process and Bringing Innovative Science to Evaluate New Chemicals Under TSCA.” EPA states that the Office of Chemical Safety and Pollution Prevention (OCSPP) is proposing to develop and implement a multi-year collaborative research program focused on approaches for performing risk assessments on new chemical substances under TSCA. According to EPA, the effort will be performed in partnership with its Office of Research and Development (ORD) and other federal entities to leverage their expertise and resources. Written comments are due April 26, 2022. Registration for the meeting is now open.

According to EPA, the research program will refine existing approaches and develop and implement new approach methodologies (NAM) to ensure the best available science is used in TSCA new chemical evaluations. Key areas proposed in the TSCA New Chemicals Collaborative Research Program include:

• Updating OCSPP’s approach to using data from structurally similar chemicals to determine potential risks from new chemicals, also known as read-across. According to EPA, this will increase the efficiency of new chemical reviews, promoting the use of the best available data to protect human health and the environment.
• Digitizing and consolidating information on chemicals to include data and studies that currently exist only in hard copy or in various disparate TSCA databases. EPA will combine the information with publicly available sources to expand the amount of information available, enhancing chemical reviews and enabling efficient sharing of chemical information across EPA. Safeguards for confidential business information (CBI) will be maintained as appropriate in this process.
• Updating and augmenting the models used for predicting a chemical’s physical-chemical properties and environmental fate/transport, hazard, exposure, and toxicokinetics to provide a suite of models to be used for new chemicals assessments. The goal of this effort is to update the models to reflect the best available science, increase transparency, and establish a process for updating these models as science evolves.
• Exploring ways to integrate and apply NAMs in new chemicals assessments, reducing the use of animal testing. EPA states that as this effort evolves, the goal is to develop a suite of accepted, fit-for-purpose NAMs that could be used by external stakeholders for data submissions under TSCA, as well as informing and expanding new chemical categories.
• Developing a decision support tool that integrates the various information streams specifically used for new chemical risk assessments. The decision support tool will integrate more efficiently all the data streams (e.g., chemistry, fate, exposures, hazards) into a final risk assessment and transparently document the decisions and assumptions made. Simply put, this will facilitate the new chemicals program tracking decisions over time and evaluating consistency within and across chemistries.

EPA states that additional information on each of these areas will be provided in the draft collaborative research plan that will be available in the docket by March 14, 2022. Later in 2022, EPA plans to engage its Board of Scientific Counselors (BOSC), a federal advisory committee, for peer review. EPA also intends to issue a Federal Register notice announcing the BOSC meeting and to open a docket for public comments.

Although the notice states that EPA’s background documents and the related supporting materials to the draft are available in the docket established for this meeting, Docket ID Number EPA-HQ-OPPT-2022-0218, nothing is available at this time. EPA states that it will provide additional background documents as the materials become available. After the virtual public meeting, EPA will prepare meeting minutes summarizing the individual comments received at the meeting. EPA will post the meeting minutes on its website and in the relevant docket.

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On January 12, 2016, the U.S. Environmental Protection Agency (EPA) issued a Federal Register notice announcing the availability of EPA’s response to a petition it received from the Biobased and Renewable Products Advocacy Group (BRAG®) under Section 21 of the Toxic Substances Control Act (TSCA). BRAG requested EPA to promulgate a rule pursuant to TSCA Section 8 that would establish a process to amend the list of natural sources of oil and fat in the “Soap and Detergent Association” (SDA) nomenclature system by considering the chemical equivalency of additional natural sources. While EPA denied the TSCA Section 21 petition, EPA left the door open for additional relief in this area and its notice provides useful information regarding options for doing so.

EPA concurred with BRAG that SDA nomenclature is currently limited to the listed sources. In its notice, EPA states, “[t]he petition correctly recognizes the current limitations of certain TSCA Inventory listings (i.e., those listings that incorporate particular assumptions about the natural sources of fats or oils from which the listed substance is derived, because they were named according to the SDA naming convention). Manufacturers of a new chemical substance that clearly falls outside the definitional scope of an existing chemical substance are not allowed to determine that the new chemical substance is nonetheless sufficiently ‘similar’ to the existing chemical substance, and simply deem the new chemical substance to be an existing substance on the basis of that similarity.”

While not providing details as to how it could be accomplished, EPA’s response seems to indicate that there may be opportunities for BRAG to achieve its goal. EPA stated “the petition presumes, without justification, that until a certain preliminary EPA rulemaking has been completed, those same manufacturers lack a meaningful opportunity to request that EPA enlarge the definitional scope of one or more existing chemical substances named according to the SDA naming convention.” “Although the response indicates that the current SDA Nomenclature system is limited to the original 35 sources, it is encouraging that EPA does not see a regulatory barrier to adding additional sources,” stated Richard E. Engler, Ph.D., Senior Chemist with Bergeson & Campbell, P.C. (B&C®) and BRAG advisor. Further, “[t]his language appears to support the contention that there may be an opportunity to request EPA to expand the SDA naming convention beyond the current list of 35 plant and animal sources.”

Similarly, Kathleen M. Roberts, Executive Director of BRAG, stated “BRAG is encouraged by the language in Assistant Administrator James J. Jones’ letter to BRAG, in which he highlighted Section 5(h)(4) as a potential mechanism to achieve BRAG’s goal with the Section 21 petition.” Section 5(h)(4) allows EPA to develop a rulemaking for exemption of certain chemical substances if EPA determines that the manufacture, processing, distribution, use, or disposal will not present an unreasonable risk.

Ms. Roberts also stated that “BRAG members are evaluating next steps, including careful consideration of the potential pathways to achieve the ultimate goal of the petition that EPA identified in its response.” As part of its 2016 efforts, BRAG is expanding its membership to include more companies that have already been or may be adversely impacted by EPA’s current naming convention policies, such as companies looking to produce bio-based chemicals from algae or non-traditional plant materials.

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