Federal Register / Vol. 89, No. 232 / Tuesday, December 3, 2024 / Notices 95779 

enumerated in TSCA section 6(a), 15 

U.S.C. 2605(a). The Agency is given a 

range of risk management options under 

TSCA—including labeling, 

recordkeeping or notice requirements, 

actions to reduce human exposure or 

environmental release, and a ban of the 

chemical or of certain uses. EPA will 

not be revisiting the risk management 

for the unreasonable risk that was 

identified in the Asbestos Part 1 Risk 

Evaluation (Ref. 4) and that was 

addressed in the final rule that was 

issued in March 2024 (89 FR 21970, 

March 28, 2024; FRL–8332–01–OCSPP). 

Like the prioritization and risk 

evaluation processes, there is an 

opportunity for public comment on any 

proposed risk management actions. 

IV. References 

The following is a listing of the 

documents that are specifically 

referenced in this document. The docket 

includes these documents and other 

information considered by EPA, 

including documents that are referenced 

within the documents that are included 

in the docket, even if the referenced 

document is not physically located in 

the docket. For assistance in locating 

these other documents, please consult 

the person listed under FOR FURTHER

INFORMATION CONTACT. 

1. EPA. High-Priority Substance Designations 

Under the Toxic Substances Control Act 

(TSCA) and Initiation of Risk Evaluation 

on High-Priority Substances; Notice of 

Availability. Federal Register. 84 FR 

71924, December 30, 2019 (FRL–10003– 

15). 

2. EPA. Asbestos (Part 1: Chrysotile 

Asbestos); Final Toxic Substances 

Control Act (TSCA) Risk Evaluation; 

Notice of Availability. Federal Register. 

86 FR 89, January 4, 2021 (FRL–10017– 

43). 

3. EPA. Asbestos Part 2 Supplemental 

Evaluation Including Legacy Uses and 

Associated Disposals; Draft Risk 

Evaluation Under the Toxic Substances 

Control Act; Notice of Availability, 

Webinar and Request for Comment. 

Federal Register. 89 FR 26878, April 16, 

2023 (FRL–9347–06–OCSPP). 

4. EPA. Risk Evaluation for Asbestos, Part 1: 

Chrysotile Asbestos. December 2020. 

Office of Chemical Safety and Pollution 

Prevention. Washington, DC. December 

2020. (EPA Document ID No. EPA–HQ– 

OPPT–2021–0057–0007). https://

www.regulations.gov/document/EPAHQ-OPPT-2021-0057-0007. 

5. EPA. Letter Peer Review; White Paper: 

Quantitative Human Health Approach 

To Be Applied in the Risk Evaluation for 

Asbestos Part 2; Notice of Availability 

and Request for Comment. Federal 

Register. 88 FR 51309, August 3, 2023 

(FRL–10017–43). 

6. EPA. Nontechnical Summary of the TSCA 

Risk Evaluation for Asbestos (Part 2) 

November 2024. (EPA Document ID No. 

EPA–740–S–24–006). 

7. EPA. Asbestos Part 1; Chrysotile Asbestos; 

Regulation of Certain Conditions of Use 

Under the Toxic Substances Control Act 

(TSCA). Federal Register. 89 FR 21970, 

March 28, 2024 (FRL–8332–01–OCSPP). 

8. EPA. Draft Comment Summary and 

Responses for Asbestos Part 2: 

Supplemental Evaluation Including 

Legacy Uses and Associated Disposals of 

Asbestos; Regulation Under the Toxic 

Substances Control Act. November 2024. 

9. EPA. Draft Comment Summary and 

Responses for Letter Peer Review of 

White Paper: Quantitative Human Health 

Approach To Be Applied in the Risk 

Evaluation for Asbestos Part 2. 

November 2024. 

Authority: 15 U.S.C. 2601 et seq. 

Dated: November 26, 2024. 

Michal Freedhoff, 

Assistant Administrator, Office of Chemical 

Safety and Pollution Prevention. 

[FR Doc. 2024–28285 Filed 12–2–24; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OPPT–2024–0425; FRL–12241– 

02–OCSPP] 

1,3-Butadiene; Draft Risk Evaluation 

Under the Toxic Substances Control 

Act (TSCA); Science Advisory 

Committee on Chemicals (SACC) Peer 

Review; Notice of SACC Meeting, 

Availability of Draft Documents and 

Request for Comment 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice. 

SUMMARY: The Environmental Protection 

Agency (EPA or Agency) is announcing 

the availability of and soliciting public 

comment on the draft risk evaluation for 

1,3-butadiene. The draft risk evaluation 

was prepared under the Toxic 

Substances Control Act (TSCA) and will 

be submitted to the Science Advisory 

Committee on Chemicals (SACC) for 

peer review. EPA is also announcing 

that there will be two virtual public 

meetings of the SACC: On February 4, 

2025, a preparatory meeting for the 

SACC to consider the scope and clarity 

of the draft charge questions for the peer 

review; and on February 25 through 28, 

2025, the peer review meeting for the 

SACC to consider the draft documents 

and public comments. 

DATES: 

Preparatory Public Meeting: 

Meeting date: February 4, 2025, 1:00 

p.m. to approximately 4:00 p.m. (ET). 

Registration: To request time to 

present oral comments during the 

preparatory meeting, you must register 

by noon (12:00 p.m. ET) on January 31, 

2025. For those not making oral 

comments, registration will remain open 

through the end of this meeting on 

February 4, 2025. 

Comments: Submit written comments 

on the scope and clarity of the charge 

questions, by noon (12:00 p.m. ET) on 

January 28, 2025. (Submit a written 

version of your oral comments by noon 

(12:00 p.m. ET) on January 31, 2025.) 

SACC Peer Review Public Meeting: 

Meeting dates: February 25 through 

28, 2025, 10:00 a.m. to approximately 

5:00 p.m. (ET). 

Registration: To request time to 

present oral comments during the peer 

review meeting, you must register by 

noon, February 18, 2025. For those not 

making oral comments, registration will 

remain open through the end of this 

meeting on February 28, 2025. 

Comments: Submit written comments 

on the draft documents, and written 

version of your oral comments, on or 

before February 3, 2025. 

Special Accommodations: To allow 

sufficient time for EPA to process your 

request for special accommodations 

before the meeting, please submit the 

request at least ten business days in 

advance of the relevant meeting. 

ADDRESSES: 

Comments: Submit written comments, 

identified by docket identification (ID) 

number EPA–HQ–OPPT–2024–0425, 

through https://www.regulations.gov. 

Follow the online instructions for 

submitting comments. Do not submit 

electronically any information you 

consider to be Confidential Business 

Information (CBI) or other information 

whose disclosure is restricted by statute. 

Additional information on commenting 

or visiting the docket, along with more 

information about dockets generally, is 

available at https://www.epa.gov/. 

Meeting Registration: Online 

registration will be available beginning 

in January 2025. Please refer to the 

SACC website at https://www.epa.gov/ 

tsca-peer-review. After registering, you 

will receive the webcast and streaming 

service meeting links and audio 

teleconference information. 

Special accommodation requests: To 

request an accommodation for a 

disability, please contact the Designated 

Federal Official (DFO) listed under FOR

FURTHER INFORMATION CONTACT. 

FOR FURTHER INFORMATION CONTACT: 

Designated Federal Official (DFO): 

Alie Muneer, Mission Support Division 

(7602M), Office of Program Support, 

Office of Chemical Safety and Pollution 

Prevention, Environmental Protection 

Agency; telephone number: (202) 564– 


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6369 or call the main office number: 

(202) 564–8450; email address: 

muneer.alie@epa.gov. 

Technical information: Brooke Porter, 

Existing Chemicals Risk Management 

Division, Office of Pollution Prevention 

and Toxics, Office of Chemical Safety 

and Pollution Prevention, 

Environmental Protection Agency; 

telephone number: (202) 564–6388; 

email address: porter.brooke@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Executive Summary 

A. What action is the Agency taking? 

EPA is announcing the availability of 

and soliciting public comment on the 

draft risk evaluation for 1,3-butadiene. 

The draft risk evaluation was prepared 

under the Toxic Substances Control Act 

(TSCA) and will be submitted to the 

Science Advisory Committee on 

Chemicals (SACC) for peer review. EPA 

is also announcing that there will be 

two virtual public meetings of the 

SACC: On February 4, 2025, a 

preparatory meeting for the SACC to 

consider the scope and clarity of the 

draft charge questions for the peer 

review; and on February 25 through 28, 

2025, the peer review meeting for the 

SACC to consider the draft risk 

evaluation and public comments. 

This document provides instructions 

for accessing the materials, submitting 

written comments, and registering to 

provide oral comments and attend the 

public meetings. 

B. What is the Agency’s authority for 

taking this action? 

EPA established the SACC in 2016 in 

accordance with TSCA, 15 U.S.C. 

2625(o), to provide independent advice 

and expert consultation with respect to 

the scientific and technical aspects of 

issues relating to the implementation of 

TSCA. The SACC operates in 

accordance with the Federal Advisory 

Committee Act (FACA), 5 U.S.C. 10, and 

supports activities under TSCA, 15 

U.S.C. 2601 et seq., the Pollution 

Prevention Act (PPA), 42 U.S.C. 13101 

et seq., and other applicable statutes. 

C. Does this action apply to me? 

This action is directed to the public 

in general and may be of particular 

interest to those involved in the 

manufacture, processing, distribution, 

and disposal of the subject chemical 

substances, and/or those interested in 

the assessment of risks involving 

chemical substances and mixtures 

regulated under TSCA (including 

members of at-risk communities, nongovernmental organizations (NGOs), 

federal, state, and local officials). Since 

other entities may also be interested, the 

Agency has not attempted to describe all 

the specific entities that may be 

interested. 

D. What should I consider as I submit 

my comments to EPA? 

1. Submitting CBI. Do not submit CBI 

or other sensitive information to EPA 

through https://www.regulations.gov or 

email. To include information in your 

comment that you consider to be CBI or 

otherwise protected, please contact the 

DFO listed under FOR FURTHER

INFORMATION CONTACT to obtain special 

instructions before submitting that 

information. 

2. Tips for preparing comments. 

When preparing and submitting your 

comments, see https://www.epa.gov/ 

dockets/commenting-epa-dockets. See 

also the instructions in Unit III.C. 

E. How can I stay informed about SACC 

activities? 

You may subscribe to the following 

listserv for alerts regarding this and 

other SACC-related activities: https://

public.govdelivery.com/accounts/ 

USAEPAOPPT/subscriber/new?topic_

id=USAEPAOPPT_101. 

II. Background 

A. What is the purpose of the SACC? 

The SACC provides independent 

advice and recommendations to the EPA 

on the scientific and technical aspects of 

risk assessments, methodologies, and 

pollution prevention measures and 

approaches for chemicals regulated 

under TSCA. The SACC is composed of 

experts in toxicology; environmental 

risk assessment; exposure assessment; 

and related sciences (e.g., synthetic 

biology, pharmacology, biotechnology, 

nanotechnology, biochemistry, 

biostatistics, physiologically based 

pharmacokinetic (PBPK) modeling, 

computational toxicology, 

epidemiology, environmental fate, and 

environmental engineering and 

sustainability). When needed, the SACC 

committee will be assisted by ad hoc 

reviewers with specific expertise in the 

topics under consideration. 

B. Why is EPA conducting these risk 

evaluations? 

TSCA requires EPA to conduct risk 

evaluations on prioritized chemical 

substances and allows chemical 

manufacturers to request an EPAconducted risk evaluation of a chemical 

substance (or category of chemical 

substances) using the procedures 

established in 40 CFR 702.37. TSCA 

also identifies the minimum 

components EPA must include in all 

chemical substance risk evaluations. 

The purpose of conducting risk 

evaluations is to determine whether a 

chemical substance presents an 

unreasonable risk to human health or 

the environment under the Conditions 

of Use (COUs). These evaluations 

include assessing unreasonable risks to 

relevant potentially exposed or 

susceptible subpopulations. As part of 

this process EPA: (1) Integrates hazard 

and exposure assessments using the best 

available science that is reasonably 

available to ensure decisions are based 

on the weight of the scientific evidence, 

and (2) Conducts peer review for risk 

evaluation approaches that have not 

been previously peer-reviewed. 

For more information about the TSCA 

risk evaluation process for existing 

chemicals, go to https://www.epa.gov/ 

assessing-and-managing-chemicalsunder-tsca. 

C. Why is EPA evaluating this chemical 

substance? 

In 2020, EPA issued final scope 

documents for the 20 chemical 

substances designated in December 

2019 as High-Priority Substances for the 

TSCA risk evaluation process, which 

included 1,3-butadiene. The final scope 

documents outline the hazards, 

exposures, conditions of use, and the 

potentially exposed or susceptible 

subpopulations the Agency expected to 

consider in its risk evaluation for the 

substances (85 FR 55283, September 4, 

2020 (FRL–10013–90)). 

1,3-Butadiene (CASRN 106–99–0) is a 

volatile, colorless gas with a total U.S. 

production volume between 1 and 5 

billion pounds. It is produced in 

petrochemical processing and extracted 

and further processed as a building 

block for several polymers and 

elastomers that do not readily 

depolymerize. Air is expected to be the 

major pathway of exposure for 1,3- 

butadiene in the environment. Although 

1,3-butadiene is moderately soluble in 

water, monitoring data indicate that it is 

not detected in water. Environmental 

release data show that more than 98 

percent of 1,3-butadiene facility releases 

are to air. Once in air, 1,3-butadiene will 

not deposit to land or adsorb to organic 

matter due to its chemical properties. 

Long-range transport in air is not 

expected, in part, because 1,3-butadiene 

has a short half-life (<8 hours) and will 

degrade into formaldehyde and acrolein. 

Reduced fetal body weight and 

hematological effects are indicated as 

the most sensitive and robust noncancer human health hazards. EPA has 

classified 1,3-butadiene as a human 

carcinogen and epidemiology studies 

have demonstrated an association 

between 1,3-butadiene exposure and 


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increased incidence of leukemia in 

workers. 

D. What is the topic of the planned 

SACC peer review? 

EPA is submitting the draft risk 

evaluation of 1,3-butadiene and 

associated supporting documents to the 

SACC for peer review, along with the 

public comments received. The draft 

risk evaluation includes analyses of 

physical chemical properties, the fate 

and transport in the environment, 

releases to the environment, exposure to 

workers and the general population, 

including potentially exposed 

susceptible subpopulations, 

environmental risk characterization, and 

human health hazard and risk 

characterization for workers and the 

general population. 

EPA is focusing its peer review charge 

on specific scientific areas and analyses. 

Many of the methods and analyses used 

in these evaluations are not novel and 

have been reviewed in the development 

of previous TSCA assessments. EPA is 

requesting feedback on approaches, 

results and calculations associated with 

the exposure, human health hazard, and 

environmental hazard analyses. EPA is 

releasing the draft risk evaluation for 

public comment and independent, 

expert peer review. Once EPA receives 

comment and input from public 

comment and peer review, revisions 

will be made, and the Agency will 

finalize the 1,3-butadiene risk 

evaluation. 

EPA is requesting a focused panel 

discussion and feedback on novel 

approaches, unique exposure analyses 

and other calculations, and selection of 

key hazard endpoints for 1,3-butadiene: 

• No exposure to aquatic and 

terrestrial species is expected due to the 

physical and chemical properties of 1,3- 

butadiene, which is primarily released 

to air and does not partition, deposit, or 

persist in or on water or soil. Monitoring 

data indicate that 1,3-butadiene is not 

detected in water. Exposure of terrestrial 

organisms via ambient air will be brief 

due to the reactive nature of 1,3- 

butadiene. EPA is seeking comment on 

the preliminary determination that 

quantitative risk assessment for 

ecological taxa is not needed for 1,3- 

butadiene. 

• Reduced fetal body weight (the 

basis of the acute Reference 

Concentration (RfC) in the 2002 IRIS 

Assessment) is observed in both mice 

and rats following gestational exposure 

but is not expected to result from a 

single dose of 1,3-butadiene. Further, 

EPA did not identfy effects of 

teratogenicity or any other relevant 

endpoint following single exposures at 

doses relevant to human exposure 

scenarios. Therefore, EPA did not derive 

an acute point of departure (POD) or 

quantify risks from acute exposures. 

EPA is seeking comment on the 

preliminary determination that there is 

no appropriate POD to support acute 

risk estimates. 

• Ovarian atrophy is an adverse effect 

observed only in mice and can be 

attributed to a specific 1,3-butadiene 

metabolite (diepoxybutane) that is less 

prevalent in rats and humans. EPA has 

evaluated the relevance of ovarian 

atrophy for assessing human risk and 

determined that the ovarian atrophy 

endpoint is not appropriate for 

extrapolating to human risk due to 

differences in species-specific 

metabolites. EPA is proposing to use 

decreased fetal body weight as the basis 

for the intermediate and chronic points 

of departure for 1,3-butadiene. EPA is 

seeking comment on these preliminary 

conclusions to establish intermediate 

and chronic points of departure based 

on reduced fetal body weight. 

• OPPT revised the inhalation unit 

risk (IUR) for 1,3-butadiene presented in 

the IRIS 2002 assessment to incorporate 

updated epidemiological cohort data. 

EPA is seeking comment on the 

mathematical approach and new 

epidemiological cohort data used in the 

revised IUR. OPPT also derived bladder 

cancer risk estimates using the same 

epidemiological cohort and is seeking 

comment on the appropriate IUR for 

evaluating cancer risk. 

• EPA has conducted a mutagenic 

mode of action analysis and evaluating 

whether the use of an age-dependent 

adjustment factor (ADAF) for leukemia 

is appropriate. EPA has preliminarily 

concluded that a mutagenic mode of 

action is applicable to 1,3-butadiene and 

use of an age-dependent adjustment 

factor (ADAF) for leukemia is 

appropriate. EPA is seeking comment on 

this analysis and preliminary 

conclusion. 

• The majority of occupational 

exposure sampling data points, 

collected from OSHA, NIOSH, and 

ACC’s report, were not quantifiable 

values but were identified as being 

below the limit of detection (LOD). For 

datasets including exposure data that 

were reported as below the LOD, EPA 

estimated exposure concentrations, 

following EPA’s Guidelines for 

Statistical Analysis of Occupational 

Exposure Data. Based on these 

guidelines, EPA used the LOD value as 

the high-end estimate and half the LOD 

as central tendency. EPA is seeking 

comment on this approach and the 

relevance of this dataset for risk 

characterization. 

• General population exposure to 1,3- 

butadiene was modeled using the 

Human Exposure Model (HEM) to 

estimate ambient air concentrations 

based on releases reported to the Toxic 

Release Inventory (TRI) for years 2016 to 

2021. Exposure concentrations were 

modeled at discrete distances from 

releasing facilities and surrounding 

census blocks. EPA is seeking comment 

on this analysis and preliminary 

conclusions. 

III. Public Meeting of the SACC 

A. What is the purpose of the virtual 

public meeting(s)? 

EPA is planning two virtual public 

meetings: (1) A preparatory public 

meeting for the SACC to consider and 

ask questions regarding the scope and 

clarity of the draft charge questions; and 

(2) a public peer review meeting for the 

SACC to consider and peer review the 

draft risk evaluation. These public 

meetings are part of the SACC’s peer 

review of the Agency’s methods and 

novel analyses for the draft risk 

evaluation of 1,3-butadiene. The agenda 

for these meetings will be posted in the 

docket and will also be available 

through the SACC website. 

Recommendations from this SACC 

review and public comments will be 

considered in the development of the 

TSCA risk evaluation and may inform 

other EPA efforts related to the 

assessment and regulation of the 

chemical substance. The Agency will be 

seeking SACC review of its data 

analyses and methodologies relevant to 

human health hazard and exposure 

analyses that have not been previously 

peer-reviewed. 

B. How can I participate in the virtual 

public meeting(s)? 

To participate in these virtual public 

meetings, you must register online to 

receive the webcast and streaming 

service meeting links and audio 

teleconference information for each 

meeting. Online registration will be 

available beginning approximately one 

month prior to the meeting and will 

remain open through the end of the 

meeting. To make oral comments during 

one of these meetings, follow the 

instructions in this document. 

C. How can I access the documents? 

The draft risk evaluation for 1,3- 

butadiene and related documents, 

including background documents, 

related supporting materials, and draft 

charge questions, are available in the 

docket. As additional background 

materials become available, EPA will 

include those additional background 


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materials (e.g., SACC members and 

consultants participating in this meeting 

and the meeting agenda) in the docket 

and through links on the SACC website 

at https://www.epa.gov/tsca-peerreview. 

D. How can I provide comments? 

To ensure proper receipt of 

comments, it is imperative that you 

identify docket ID No. EPA–HQ–OPPT– 

2024–0425 in the subject line on the 

first page of your comments and follow 

the instructions in this document. 

1. Written comments. Submit written 

comments by the deadlines set in the 

DATES section of this document and as 

described in the ADDRESSES section of 

this document. 

2. Oral comments. To request time to 

present oral comments during one of the 

virtual public meetings, you must 

register online by the deadlines set in 

the DATES section of this document. Oral 

comments during the virtual public 

meetings are limited to 5 minutes. In 

addition, each speaker should submit a 

written copy of their oral comments and 

any supporting materials (e.g., 

presentation slides) to the DFO prior to 

the meetings for distribution to the 

SACC. 

E. What happens after the SACC 

meeting(s)? 

After the SACC public meeting, the 

SACC will prepare the meeting minutes 

and final report document summarizing 

its recommendations to the EPA, which 

will also be available in the docket and 

through the SACC website. EPA will 

consider the SACC recommendations 

and public comments to complete the 

risk evaluation and unreasonable risk 

determination under TSCA for this 

chemical substance. Under TSCA, EPA 

must then initiate risk management 

actions to address the unreasonable risk 

it identified. 

Authority: 15 U.S.C. 2625(o); 5 U.S.C. 

10. 

Dated: November 26, 2024. 

Michal Freedhoff, 

Assistant Administrator, Office of Chemical 

Safety and Pollution Prevention. 

[FR Doc. 2024–28286 Filed 12–2–24; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OPPT–2024–0551; FRL–12418– 

01–OCSPP] 

Benzyl Butyl Phthalate (BBP), Dibutyl 

Phthalate (DBP), Di(2-ethylhexyl) 

Phthalate (DEHP), Diisobutyl Phthalate 

(DIBP), and Dicyclohexyl Phthalate 

(DCHP); Technical Support 

Documents; Science Advisory 

Committee on Chemicals (SACC) Peer 

Review; Request for Nominations of 

Ad Hoc Reviewers 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice. 

SUMMARY: The Environmental Protection 

Agency (EPA or Agency) is seeking 

public nominations of scientific and 

technical experts that EPA can consider 

for service as ad hoc reviewers assisting 

the Science Advisory Committee on 

Chemicals (SACC) with the peer review 

of the Agency’s technical support 

documents for benzyl butyl phthalate 

(BBP), dibutyl phthalate (DBP), di(2- 

ethylhexyl) phthalate (DEHP), 

diisobutyl phthalate (DIBP), and 

dicyclohexyl phthalate (DCHP) and the 

cross-phthalate technical support 

documents for human health benchmark 

dose (BMD) analysis, cancer analysis, 

and cumulative risk analysis. To 

facilitate nominations, this document 

provides information about the SACC, 

the intended topic for the planned peer 

review, the expertise sought for this 

peer review, instructions for submitting 

nominations to EPA, and the Agency’s 

plan for selecting the ad hoc reviewers 

for this peer review. EPA is planning to 

convene a virtual public meeting of the 

SACC in the spring of 2025 to review 

the technical support documents. 

DATES: Submit your nominations on or 

before January 2, 2025. 

ADDRESSES: Submit your nominations to 

SACC@epa.gov. 

FOR FURTHER INFORMATION CONTACT: The 

Designated Federal Official (DFO) for 

the SACC is Dr. Alaa Kamel, Mission 

Support Division (7602M), Office of 

Program Support, Office of Chemical 

Safety and Pollution Prevention, 

Environmental Protection Agency; 

telephone number: (202) 564–5336 or 

call the SACC main office at (202) 564– 

8450; email address: kamel.alaa@

epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. General Information 

A. What action is the Agency taking? 

The Agency is seeking public 

nominations of scientific and technical 

experts that EPA can consider for 

service as ad hoc reviewers assisting the 

SACC with the peer review of the 

Agency’s technical support documents 

for the evaluation of the risks from BBP, 

DBP, DEHP, DIBP and DCHP to inform 

risk management decisions under 

TSCA. EPA is planning to hold a virtual 

public meeting in the spring of 2025 for 

the SACC to consider and review 

technical support documents. At that 

time, EPA will solicit comments from 

the SACC on the critical inputs and 

novel approaches for a variety of charge 

questions related to individual, draft 

chemical risk evaluations and the draft 

cumulative risk analysis. 

To facilitate nominations, this 

document provides information about 

the SACC, the intended topic for the 

planned peer review, the expertise 

sought for this peer review, instructions 

for submitting nominations to EPA, and 

the Agency’s plan for selecting the ad 

hoc reviewers for this peer review. 

B. What is the Agency’s authority for 

taking this action? 

TSCA section 6(b) requires that EPA 

conduct risk evaluations on existing 

chemical substances and identifies the 

minimum components EPA must 

include in all chemical substance risk 

evaluations (15 U.S.C. 2605(b)). The risk 

evaluation must not consider costs or 

other non-risk factors (15 U.S.C. 

2605(b)(4)(F)(iii)). The specific risk 

evaluation process is addressed in 40 

CFR part 702 and summarized on EPA’s 

website at https://www.epa.gov/ 

assessing-and-managing-chemicalsunder-tsca/risk-evaluations-existingchemicals-under-tsca. 

The SACC was established by EPA in 

2016 in accordance with TSCA, 15 

U.S.C. 2625(o), to provide independent 

advice and expert consultation with 

respect to the scientific and technical 

aspects of issues relating to the 

implementation of TSCA. The SACC 

operates in accordance with the Federal 

Advisory Committee Act (FACA), 5 

U.S.C. 10, and supports activities under 

TSCA, 15 U.S.C. 2601 et seq., the 

Pollution Prevention Act (PPA), 42 

U.S.C. 13101 et seq., and other 

applicable statutes. 

C. Does this action apply to me? 

This action is directed to the public 

in general. This action may, however, be 

of particular interest to those involved 

in the manufacture, processing, 

distribution, and disposal of chemical 

substances and mixtures, and/or those 

interested in the assessment of risks 

involving chemical substances and 

mixtures regulated under TSCA. 

Members of at-risk communities, nonVerDate Sep<11>2014 17:09 Dec 02, 2024 Jkt 265001 PO 00000 Frm 00051 Fmt 4703 Sfmt 4703 E:\FR\FM\03DEN1.SGM 03DEN1

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