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By Lynn L. Bergeson and Carla N. Hutton

On January 21, 2022, the U.S. Environmental Protection Agency (EPA) announced that it will hold a virtual peer review meeting of the Science Advisory Committee on Chemicals (SACC) to consider and review the “Draft TSCA Screening Level Approach for Assessing Ambient Air and Water Exposures to Fenceline Communities Version 1.0.” 87 Fed. Reg. 3294. The meeting will be held March 15-17, 2022, and will be open to the public. Along with presenting the methodology, EPA will also present results of applying the screening methodology (case studies) to 1-bromopropane (1-BP) (air pathway), N-methylpyrrolidone (NMP) (water pathway), and methylene chloride (MC) (air and water pathway). In addition, EPA announced the availability of and solicited public comments on the draft approach, which will be presented as a screening level methodology for assessing potential air and water chemical exposures to fenceline communities. Comments are due February 22, 2022.

EPA's background documents, related supporting materials, and draft charge questions to the SACC are available in Docket ID EPA-HQ-OPPT-2021-0415 and on the SACC website. EPA will provide additional background documents (e.g., SACC members and consultants participating in this meeting and the meeting agenda) as the materials become available. Registration is required to receive the webcast meeting link and audio teleconference information. EPA states that it intends to announce registration instructions on the SACC website by early February 2022.

More information and a detailed commentary will be available in a forthcoming memorandum that will be posted on our website.


 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) announced on January 13, 2022, that it is accepting public comments on candidates under consideration for selection as ad hoc peer reviewers assisting the Science Advisory Committee on Chemicals (SACC) with its review of the Draft Systematic Review Protocol Supporting TSCA Risk Evaluations for Chemical Substances. This comment period follows a previous 30-day call for nominations that ended on November 17, 2021. EPA will use comments on the potential candidates to assist it in selecting approximately six to eight ad hoc reviewers, depending on a balance of experience, to assist SACC with its review. Biographies of the candidates are available at regulations.gov. Comments are due January 28, 2022, to Docket ID EPA-HQ-OPPT-2021-0414.
 
As reported in our December 21, 2021, memorandum, the draft protocol incorporates changes to address recommendations from the National Academies of Sciences, Engineering, and Medicine, as well as comments received from SACC and the public. The SACC review of the protocol will take place during a public meeting April 19-21, 2022. According to EPA, this review “will provide a transparent process to ensure that the protocol follows sound science and incorporates independent scientific advice and recommendations.” EPA will announce registration instructions on the SACC website in early March.


 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) Office of Chemical Safety and Pollution Prevention (OCSPP) is accepting public comments on candidates under consideration for selection as ad hoc reviewers assisting the Science Advisory Committee on Chemicals (SACC) with their review of the draft EPA Toxic Substances Control Act (TSCA) Screening Level Approach for Assessing Ambient Air and Water Exposures to Fenceline Communities. EPA will use the comments to assist it in selecting approximately six to eight ad hoc reviewers to assist the SACC with its review. Biographies of the candidates are available online. Comments are due January 5, 2022. Comments can be submitted through Docket ID EPA-HQ-OPPT-2021-0415. Information considered to be confidential business information (CBI) or other information whose disclosure is restricted by statute should not be submitted electronically. EPA notes that it will not post copyrighted material without explicit permission of the copyright holder.
 
EPA notes that it published ten final risk evaluations between 2020 and 2021 under TSCA as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act. During the course of preparing many of these final risk evaluations, the previous Administration made a policy decision that EPA not assess air and water exposure pathways that fall under the jurisdiction of other EPA-administered laws. This policy decision was reversed in June 2021. EPA states that it is presenting Version 1.0 of a screening level methodology for assessing potential air and water pathway chemical exposures to fenceline communities. Along with presenting this methodology, EPA will also present results of applying the screening methodology (case studies) to 1-bromopropane (air pathway), N-methylpyrrolidone (water pathway), and methylene chloride (air and water pathway). The review will take place during a public meeting anticipated for March 15-17, 2022. Registration instructions will be announced on the SACC website in early February 2022.


 
By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) announced the availability of the Draft Systematic Review Protocol Supporting TSCA Risk Evaluations for Chemical Substances (Draft Protocol) on December 20, 2021. 86 Fed. Reg. 71891. According to EPA, the Draft Protocol includes a revised generic approach for Toxic Substances Control Act (TSCA)-related approaches accounting for previous peer review comments from the Science Advisory Committee on Chemicals (SACC) reviews of risk evaluations on the first ten chemical assessments and more recent recommendations from the National Academies of Sciences, Engineering, and Medicine (NASEM) review of the Application of Systematic Review in TSCA Risk Evaluations. EPA states that in addition to the revised, generic approach, the peer review package will include appendices containing chemical-specific information that is relevant for search strings and screening statements and data evaluation criteria for the next chemical risk evaluations being conducted by the Office of Pollution Prevention and Toxics (OPPT). The Draft Protocol provides specific details of the systematic reviews for the individual chemicals listed below:

o-Dichlorobenzene
p-Dichlorobenzene
1,2-Dichloroethane
trans-1,2- Dichloroethylene
1,1,2-Trichloroethane
1,2-Dichloropropane
1,1-Dichloroethane
Ethylene dibromide
1,3-Butadiene
1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB)
4,4'-(1-Methylethylidene)bis[2, 6-dibromophenol] (TBBPA)
Tris(2-chloroethyl) phosphate (TCEP)
Phosphoric acid, triphenyl ester (TPP)
Formaldehyde
Phthalic anhydride
Dibutyl phthalate (DBP) (1,2-Benzene-dicarboxylic acid, 1,2- dibutyl ester)
Butyl benzyl phthalate (BBP) -- 1,2-Benzene-dicarboxylic acid, 1-butyl 2(phenylmethyl) ester
Di-ethylhexyl phthalate (DEHP) -- (1,2-Benzene-dicarboxylic acid, 1,2-bis(2-ethylhexyl) ester)
Di-isobutyl phthalate (DIBP) -- (1,2-Benzene-dicarboxylic acid, 1,2-bis-(2-methylpropyl) ester)
Dicyclohexyl phthalate
Diisodecyl phthalate (DIDP)
Diisononyl phthalate (DINP)
Octamethylcyclotetra-siloxane (Cyclotetrasiloxane, 2,2,4,4,6,6,8,8-octamethyl-) (D4)
Asbestos 2 (including Libby Amphibole Asbestos [LAA] and its tremolite, winchite, and richterite constituents)
1,4-Dioxane supplement
 
EPA invites the public to provide input on the Draft Protocol via Docket No. EPA-HQ-OPPT-2021-0414. Comments are due February 18, 2022.
SACC will hold a virtual three-day peer review public meeting to consider and review the Draft Protocol on April 19-21, 2022. Stakeholders must register online to receive the webcast meeting link and audio teleconference information. Registration instructions will be announced on the SACC website by early March 2022. After the public meeting, SACC will prepare meeting minutes summarizing its recommendations to EPA. The meeting minutes will be posted on the SACC website and in the relevant docket.
 
More information and a detailed commentary will be available in a forthcoming memorandum that will be posted on our website.

 

By Lynn L. Bergeson and Carla N. Hutton
 
On October 27, 2021, the U.S. Environmental Protection Agency (EPA) requested public nominations of scientific experts to consider for service as ad hoc reviewers assisting the Science Advisory Committee on Chemicals (SACC) with two peer review topics anticipated for early 2022: the draft EPA Toxic Substances Control Act (TSCA) Systematic Review Protocol and the draft EPA TSCA Screening Level Approach for Assessing Ambient Air and Water Exposures to Fenceline Communities. 86 Fed. Reg. 59382. EPA states that individuals nominated should have expertise in one or more of the following areas:

  • Systematic review: Individuals nominated for peer review of the draft systematic review protocol should have expertise in one or more of the following areas: systematic review approaches of human health and ecological hazard, exposure topics, and fate. All experts, including those representing other fields of interest, who have experience with engineering, machine learning, artificial intelligence techniques, and natural language processing approaches as applied to systematic review are also needed. EPA states that understanding the TSCA risk evaluation process “is highly desirable for the context of this peer review.”
  • Exposures to fenceline communities: Individuals nominated for peer review of the draft EPA TSCA Screening Level Approach for Assessing Ambient Air and Water Exposures to Fenceline Communities should have expertise in one or more of the following areas: chemical fate and transport via ambient air and water pathways; atmospheric modeling of fate, transport, and human exposures; human health, exposure, and risk assessment for airborne and/or waterborne chemicals; expertise estimating environmental air releases of chemicals from a variety of sources and databases such as Chemical Data Reporting (CDR); experience developing air dispersion methodologies and/or models to estimate ambient air concentrations and impacts to human populations; expertise estimating environmental water releases of chemicals from a variety of sources and databases such as CDR, Toxics Release Inventory (TRI), and Discharge Monitoring Report; experience developing methodologies and/or models to estimate chemical concentrations in ambient/source/drinking water and impacts to human populations; and public health protection for at-risk communities.

EPA states that any interested person or organization may nominate qualified individuals to be considered prospective candidates for these reviews. Individuals may also self-nominate. Nominations are due November 17, 2021.


 

By Lynn L. Bergeson and Carla N. Hutton
 
On June 15, 2021, the U.S. Environmental Protection Agency (EPA) appointed nine new members to serve on the Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC). Additionally, EPA appointed a new Chair and reappointed seven existing members. In EPA’s July 13, 2021, announcement, EPA notes that members of the TSCA SACC serve staggered terms of appointment, generally of three years. They possess expertise in scientific and technical fields relevant to chemical risk assessment and pollution prevention, including human health and ecological risk assessment and chemical exposure to susceptible life stages and subpopulations. EPA states that in addition to scientific expertise, members also have backgrounds and experiences that will contribute to the diversity of scientific viewpoints, including professional experiences in government, public health, industry, and other groups. According to EPA, TSCA SACC serves as a primary scientific peer review mechanism of EPA’s Office of Chemical Safety and Pollution Prevention (OCSPP) and is structured to provide 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.


 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) is accepting public comments for all candidates under consideration for membership on the Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC).  Biographies for all candidates are available in Docket ID EPA-HQ-OPPT-2020-0135.  When providing comments, EPA states that stakeholders should not submit electronically any information considered to be confidential business information (CBI) or other information whose disclosure is restricted by statute.  Comments are due October 30, 2020.  EPA will use public comments to assist in selecting multiple members of the SACC over the next year. 
 
EPA anticipates appointing approximately 15 members to the SACC by March 2021.  EPA notes that current SACC members are eligible for reappointment during this period.  Therefore, the appointments completed by March 2021 may include a mix of newly appointed and reappointed members.


 

By Lynn L. Bergeson and Carla N. Hutton
 

The U.S. Environmental Protection Agency (EPA) is extending the nomination and public comment periods for the Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC) to receive additional nominees and input on prospective candidates for membership.  EPA states that it will use public comments to assist it in selecting multiple members of SACC over the next year.  EPA anticipates appointing approximately 15 members to SACC by March 2021.  EPA notes that current members of SACC are eligible for reappointment during this period.  Therefore, the approximately 15 member appointments completed by March 2021 may include a mix of newly appointed and reappointed members.  Biographies of the candidates are available in Docket ID EPA-HQ-OPPT-2020-0135.  Comments are due September 1, 2020.

Tags: SACC

 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) announced on May 11, 2020, that the Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC) will meet from June 8 to 11, 2020, to peer review the draft risk evaluation for asbestos.  The public meeting will be virtual, with participation by phone and webcast only.  There will be no in-person gathering for this meeting.  EPA postponed the previously announced virtual meeting for SACC to review the draft risk evaluation for asbestos due to changes in the availability of members for the peer review.  Stakeholders must register online to receive the webcast meeting link and audio teleconference information for participation in this meeting.  Stakeholders may register and participate as listen-only attendees at any time up to the end of the meeting.  Requests to make brief oral comments to SACC during the virtual meeting should be submitted when registering online on or before noon (12:00 p.m. EDT) on June 2, 2020.


 

By Lynn L. Bergeson and Carla N. Hutton
 
The U.S. Environmental Protection Agency (EPA) has postponed the Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC) peer review virtual meeting scheduled for April 27-30, 2020, due to recent changes in the availability of SACC members for the review.  EPA states that given the importance of the draft risk evaluation for asbestos, it believes that “rescheduling for a time when more members are available is critical and will allow for a more robust review of the evaluation.”  As a result, EPA will reschedule the SACC meeting “as soon as practicable.”  EPA notes that while it does not anticipate extending the written public comment period on the draft risk evaluation past June 2, 2020, “as needs arise EPA will review and respond appropriately.”  EPA will provide all written comments received by June 2, 2020, to SACC for their review prior to the meeting.  Once EPA has selected a new date for the SACC meeting, EPA will provide an update on public commenting, including registering to provide oral public comments during the SACC meeting.  EPA states that it “remains committed to completing this process as expeditiously as possible.”  More information on EPA’s draft risk evaluation is available in our April 1, 2020, memorandum, “EPA Publishes Draft Risk Evaluation of Asbestos, Will Hold Virtual Peer Review Meeting.”


 
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