638 Federal Register / Vol. 90, No. 3 / Monday, January 6, 2025 / Notices 

1 18 CFR 5.23(b). 

DEPARTMENT OF ENERGY 

Federal Energy Regulatory 

Commission 

[Project No. P–2299–082] 

Turlock & Modesto Irrigation District; 

Notice of Reasonable Period of Time 

for Water Quality Certification 

Application 

On December 13, 2024, the Turlock & 

Modesto Irrigation District submitted to 

the Federal Energy Regulatory 

Commission (Commission) a copy of its 

application for Clean Water Act section 

401(a)(1) water quality certification filed 

with the California State Water 

Resources Control Board (Water Board), 

in conjunction with the above captioned 

project. The submittal also included a 

response from the Water Board stating 

that it received the application on the 

same day. Pursuant to section 5.23(b) of 

the Commission’s regulations,1 we 

hereby notify the Water Board of the 

following: 

Date of Receipt of the Certification 

Request: December 13, 2024. 

Reasonable Period of Time to Act on 

the Certification Request: December 13, 

2025. 

If the Water Board fails or refuses to 

act on the water quality certification 

request on or before the above date, then 

the certifying authority is deemed 

waived pursuant to section 401(a)(1) of 

the Clean Water Act, 33 U.S.C. 

1341(a)(1). 

Dated: December 30, 2024. 

Debbie-Anne A. Reese, 

Secretary. 

[FR Doc. 2024–31651 Filed 1–3–25; 8:45 am] 

BILLING CODE 6717–01–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OPP–2017–0751; FRL–12478–01– 

OCSPP] 

Pesticide Registration Review; 

Decisions and Case Closures for 

Several Pesticides; Notice of 

Availability 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice. 

SUMMARY: This notice announces the 

availability of EPA’s interim registration 

review decisions for the following 

chemicals: 1,3–PAD, chlorothalonil, 

thiophanate-methy/carbendazim, and 

TCMTB. 

FOR FURTHER INFORMATION CONTACT: 

For pesticide specific information, 

contact: The Chemical Review Manager 

for the pesticide of interest identified in 

table 1 of unit I. 

For general information on the 

registration review program, contact: 

Melanie Biscoe, Pesticide Re-Evaluation 

Division (7508P), Office of Pesticide 

Programs, Environmental Protection 

Agency, 1200 Pennsylvania Ave. NW, 

Washington, DC 20460–0001; telephone 

number: (202) 566–0701; email address: 

biscoe.melanie@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Purpose of This Notice 

Pursuant to 40 CFR 155.58(c), this 

notice announces the availability of 

EPA’s interim or final registration 

review decisions for the pesticides 

shown in table 1. The interim 

registration review decisions are 

supported by rationales included in the 

docket established for each chemical. 

TABLE 1—INTERIM REGISTRATION REVIEW DECISIONS BEING ISSUED

Registration review case name and No. Docket ID No. Chemical review manager and contact information 

1,3–PAD; Case Number 5109 ....................................... EPA–HQ–OPP–2014–0406 Areej Jahangir, jahangir.areej@epa.gov, (202) 566– 

1577. 

2-(thiocyanomethylthio) benzothiazole (TCMTB); Case 

Number 2625.

EPA–HQ–OPP–2014–0405 Erin Dandridge, dandridge.erin@epa.gov, (202) 566– 

0635. 

Chlorothalonil; Case Number 0097 ................................ EPA–HQ–OPP–2011–0840 Rachel Blatnick, blatnick.rachel@epa.gov, (202) 566– 

2223. 

Thiophanate-methyl and carbendazim; Case Number 

2680.

EPA–HQ–OPP–2014–0004 Alex McKee, mckee.alex@epa.gov, (202) 566–1939. 

Megan Snyderman, snyderman.megan@epa.gov, 

(202) 566–0639. 

II. Background 

EPA is conducting its registration 

review of the chemicals listed in table 

1 of unit I pursuant to the Federal 

Insecticide, Fungicide, and Rodenticide 

Act (FIFRA) section 3(g) (7 U.S.C. 

136a(g)) and the Procedural Regulations 

for Registration Review at 40 CFR part 

155, subpart C. FIFRA section 3(g) 

provides, among other things, that 

pesticide registrations are to be 

reviewed every 15 years. Consistent 

with 40 CFR 155.57, in its final 

registration review decision, EPA will 

ultimately determine whether a 

pesticide continues to meet the 

registration standard in FIFRA section 

3(c)(5) (7 U.S.C. 136a(c)(5)). As part of 

the registration review process, the 

Agency has completed interim 

registration review decisions for the 

pesticides in table 1 of unit I. 

Prior to completing the interim review 

decisions in table 1 of unit I, EPA 

posted proposed interim decisions or 

proposed registration review decisions 

for these chemicals and invited the 

public to submit any comments or new 

information, consistent with 40 CFR 

155.58(a). EPA considered and 

responded to any comments or 

information received during these 

public comment periods in the 

respective interim decision or final 

registration review decisions. 

For additional background on the 

registration review program, see: https:// 

www.epa.gov/pesticide-reevaluation. 

Authority: 7 U.S.C. 136 et seq. 

Dated: December 31, 2024. 

Jean Anne Overstreet, 

Director, Pesticide Re-Evaluation Division, 

Office of Pesticide Programs. 

[FR Doc. 2024–31644 Filed 1–3–25; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OPPT–2018–0435]; FRL–8807– 

03–OCSPP] 

Diisodecyl Phthalate (DIDP); Risk 

Evaluation Under the Toxic 

Substances Control Act (TSCA); Notice 

of Availability 

AGENCY: Environmental Protection 

Agency (EPA). 


khammond on DSK9W7S144PROD with NOTICES
Federal Register / Vol. 90, No. 3 / Monday, January 6, 2025 / Notices 639 

ACTION: Notice. 

SUMMARY: The Environmental Protection 

Agency (EPA or Agency) is announcing 

the availability of the final risk 

evaluation under the Toxic Substances 

Control Act (TSCA) for diisodecyl 

phthalate (DIDP). The purpose of risk 

evaluations under TSCA is to determine 

whether a chemical substance presents 

an unreasonable risk of injury to health 

or the environment, without 

consideration of costs or non-risk 

factors, including unreasonable risk to 

potentially exposed or susceptible 

subpopulations identified as relevant to 

the risk evaluation by EPA, under the 

conditions of use. EPA used the best 

available science to prepare this final 

risk evaluation and determined, based 

on the weight of scientific evidence, that 

DIDP poses unreasonable risk to human 

health. Under TSCA, EPA must initiate 

risk management actions to address the 

unreasonable risk. 

ADDRESSES: The docket for this action, 

identified by docket identification (ID) 

number EPA–HQ–OPPT–2018–0435, is 

available online at https://

www.regulations.gov. Additional 

information about dockets generally, 

along with instructions for visiting the 

docket in-person, is available at https:// 

www.epa.gov/dockets. 

FOR FURTHER INFORMATION CONTACT: 

For technical information: Brianne 

Raccor, Existing Chemical Risk 

Management Division (7404M), Office of 

Pollution Prevention and Toxics, 

Environmental Protection Agency, 1200 

Pennsylvania Ave. NW, Washington, DC 

20460–0001; telephone number: (202) 

564–0303; email address: 

raccor.brianne@epa.gov. 

For general information: The TSCAHotline, ABVI-Goodwill, 422 South 

Clinton Ave., Rochester, NY 14620; 

telephone number: (202) 554–1404; 

email address: TSCA-Hotline@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Executive Summary 

A. 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, 

use, and disposal of DIDP, related 

industry trade organizations, nongovernmental organizations with an 

interest in human and environmental 

health, State and local governments, 

Tribal Nations, and/or those interested 

in the assessment of risks involving 

chemical substances and mixtures 

regulated under TSCA. As such, the 

Agency has not attempted to describe all 

the specific entities that this action 

might apply to. If you need help 

determining applicability, consult the 

technical contact listed under FOR

FURTHER INFORMATION CONTACT. 

B. What is the Agency’s authority for 

taking this action? 

The Agency conducted this risk 

evaluation under TSCA section 6, 15 

U.S.C. 2605, which requires that EPA 

conduct risk evaluations on chemical 

substances and identifies the minimum 

components EPA must include in all 

chemical substance risk evaluations. 

Each risk evaluation must be conducted 

consistent with the best available 

science, be based on the weight of the 

scientific evidence, and consider 

reasonably available information. 15 

U.S.C. 2625(h), (i), and (k). See also the 

implementing procedural regulations at 

40 CFR part 702. 

C. What action is the Agency taking? 

EPA is announcing the availability of 

the final risk evaluation under TSCA for 

DIDP. The purpose of risk evaluations 

under TSCA is to determine whether a 

chemical substance presents an 

unreasonable risk of injury to health or 

the environment, without consideration 

of costs or non-risk factors, including 

unreasonable risk to potentially exposed 

or susceptible subpopulations identified 

as relevant to the risk evaluation by 

EPA, under the conditions of use. EPA 

has used the best available science to 

prepare this final risk evaluation and 

based on the weight of scientific 

evidence, determined that DIDP poses 

unreasonable risk to human health. 

Upon a determination of unreasonable 

risk, EPA must initiate risk management 

action as required pursuant to TSCA 

section 6(a), 15 U.S.C 2605(a), to 

address the unreasonable risk. 

II. Background 

A. What is DIDP? 

DIDP is a common chemical name for 

the category of chemical substances that 

includes the following substances: 1,2- 

benzenedicarboxylic acid, 1,2- 

diisodecyl ester (CASRN 26761–40–0) 

and 1,2-benzenedicarboxylic acid, diC9-11-branched alkyl esters, C10-rich 

(CASRN 68515–49–1). Both CASRNs 

contain mainly C10 dialkyl phthalate 

esters. DIDP is manufactured (including 

imported), processed, distributed, and 

disposed as part of industrial, 

commercial, and consumer conditions 

of use. DIDP is used primarily as a 

plasticizer to make flexible polyvinyl 

chloride (PVC). It is also used to make 

building and construction materials; 

automotive articles; and other 

commercial and consumer products 

including adhesives and sealants, paints 

and coatings, and electrical and 

electronic products. The production 

volume of DIDP has increased 

significantly over the past decade from 

between 100 and 250 million pounds in 

2015 to between 100 million and 1 

billion pounds in 2019. 

B. Risk Evaluation of DIDP 

In May 2019, EPA received a request 

to conduct a risk evaluation DIDP from 

ExxonMobil Chemical Company, Evonik 

Corporation, and Teknor Apex, through 

the American Chemistry Council’s High 

Phthalates Panel (ACC HPP). In 

December 2019, EPA notified ACC HPP 

that the Agency had granted the 

manufacturer requested risk evaluation. 

See EPA–HQ–OPPT–2018–0435 (Ref. 1). 

In November 2020, EPA released the 

draft scope of the DIDP risk evaluation 

(Ref. 2) and, after considering public 

comments, issued the final problem 

formulation in August 2021 (Ref. 3). On 

February 29, 2024, EPA released a draft 

risk evaluation for public comment and 

peer review by the Science Advisory 

Committee on Chemicals (SACC). (Ref. 

4). The draft documents and public 

comments are in docket ID number 

EPA–HQ–OPPT–2024–0073. A nontechnical summary is also available 

(Ref. 5). Given the shared peer review 

and chemical similarities with DINP, a 

shared set of responses to peer review 

and public comments will be available 

in January 2025 when the final 

Diisononyl Phthalate (DINP) risk 

evaluation is released (Ref. 6). 

III. Unreasonable Risk Determination 

EPA has determined that DIDP 

presents an unreasonable risk of injury 

to human health under the conditions of 

use. EPA did not identify risk of injury 

to the environment that would 

contribute to the unreasonable risk 

determination for DIDP. EPA has 

determined that the unreasonable risk to 

human health presented by DIDP is due 

to non-cancer effects (i.e., reduced 

offspring survival) in female workers of 

reproductive age from acute inhalation 

exposures and acute aggregated 

exposures. The unreasonable risk 

determination is based on the 

information within the risk evaluation, 

the appendices, and technical support 

documents of the risk evaluation in 

accordance with TSCA section 6(b). It is 

also based on TSCA’s best available 

science (TSCA section 26(h)), weight of 

scientific evidence standards (TSCA 

section 26(i)), and relevant 

implementing regulations in 40 CFR 

part 702, including, to the extent 

practicable, the amendments to the 

procedures for chemical risk evaluation 


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640 Federal Register / Vol. 90, No. 3 / Monday, January 6, 2025 / Notices 

under TSCA finalized in May 2024 (89 

FR 37028; May 3, 2024). 

Between release of the draft risk 

evaluation and finalization of the DIDP 

risk evaluation, EPA updated the risk 

determination to find that six COUs 

contribute to unreasonable risk of DIDP 

based on new information identified by 

EPA, information provided by public 

commenters, and recommendations of 

the SACC. These changes stem from 

consideration of 1) multiple factors 

impacting occupational exposure during 

spray application, 2) applicability of 

developmental effects to average adult 

workers, and 3) identification of DIDPcontaining products that could be spray 

applied. The COUs that EPA identified 

as presenting unreasonable risk were for 

acute exposure scenarios in which 

unprotected female workers of 

reproductive age were to spray 

adhesives and sealants; paints and 

coatings; lacquers, stains, varnishes, and 

floor finishes; or penetrants and 

inspection fluids that contain DIDP, 

because doing so could create high 

concentrations of DIDP in mist that an 

unprotected worker could inhale. The 

human health hazard that EPA 

identified as having the strongest 

evidence to support this risk evaluation 

is developmental toxicity, which means 

that laboratory animals dosed with DIDP 

had litters where more rodent offspring 

died than was the case with the litters 

of rodents that were not dosed with 

DIDP. As the most sensitive health 

effects of concern relate to exposure of 

the developing fetus during gestation, 

the population to which this risk 

determination is most relevant is female 

workers of reproductive age. 

Consistent with the statutory 

requirements of TSCA section 6(a), EPA 

will propose a risk management 

regulatory action to the extent necessary 

so that DIDP no longer presents an 

unreasonable risk. EPA expects to focus 

its risk management action on the 

conditions of use that significantly 

contribute to the unreasonable risk. 

However, it should be noted that, under 

TSCA section 6(a), EPA is not limited to 

regulating the specific activities found 

to drive unreasonable risk and may 

select from among a suite of risk 

management requirements in section 

6(a) related to manufacture (including 

import), processing, distribution in 

commerce, commercial use, and 

disposal as part of its regulatory options 

to address the unreasonable risk. As a 

general example, EPA may regulate 

upstream activities (e.g., processing, 

distribution in commerce) to address 

downstream activities (e.g., industrial 

and commercial uses) driving 

unreasonable risk, even if the upstream 

activities do not drive the unreasonable 

risk. Like the prioritization and risk 

evaluation processes, there is an 

opportunity for public comment on any 

proposed risk management actions. 

For more information about the TSCA 

risk evaluation process for existing 

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

assessing-and-managing-chemicalsunder-tsca. 

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. Di-isodecyl Phthalate (DIDP); 

Manufacturer Request for Risk 

Evaluation Under the Toxic Substances 

Control Act (TSCA); Notice of 

Availability and Request for Comments. 

Federal Register. 84 FR 42914, August 

19, 2019 (FRL–9998–26). 

2. EPA. Di-isodecyl Phthalate (DIDP); Draft 

Scope of the Risk Evaluation to be 

Conducted Under the Toxic Substances 

Control Act (TSCA); Notice of 

Availability and Request for Comments. 

Federal Register. 85 FR 76077, 

November 27, 2020 (FRL–10017–14). 

3. EPA. Di-isodecyl Phthalate (DIDP); Final 

Scope of the Risk Evaluation To Be 

Conducted Under the Toxic Substances 

Control Act (TSCA); Notice of 

Availability. Federal Register. 86 FR 

48695, August 31, 2021 (FRL–8807–01– 

OCSPP). 

4. EPA. Di-isodecyl Phthalate (DIDP) and Diisononyl Phthalate (DINP); Science 

Advisory Committee on Chemicals 

(SACC) Peer Review of Draft Documents; 

Notice of SACC Meeting; Availability; 

and Request for Comment. Federal 

Register. 89 FR 43847, May 20, 2024 

(FRL–11760–02–OCSPP). 

5. EPA. Nontechnical Summary of the TSCA 

Risk Evaluation for Diisodecyl Phthalate 

(DIDP). December 2024. (EPA Document 

ID No. EPA–740–S–24–008). 

6. EPA. Comment Summary and Responses 

for Diisodecyl Phthalate (DIDP) and 

Diisononyl Phthalate (DINP). December 

2024. 

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

Dated: December 20, 2024. 

Michal Freedhoff, 

Assistant Administrator, Office of Chemical 

Safety and Pollution Prevention. 

[FR Doc. 2024–31280 Filed 1–3–25; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OAR–2023–0151; FRL–10890–02– 

OAR] 

California State Nonroad Engine 

Pollution Control Standards; Small OffRoad Engines Regulations; Notice of 

Decision 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of decision. 

SUMMARY: The Environmental Protection 

Agency (‘‘EPA’’) is providing notice of 

its decision granting the California Air 

Resources Board’s (‘‘CARB’s’’) request 

for an authorization of amendments to 

its small off-road engine (‘‘SORE’’) 

regulations. CARB’s amendments 

covered by this authorization include 

those adopted by CARB in 2016 and 

2021. EPA’s decision was issued under 

the authority of section 209 of the Clean 

Air Act (‘‘CAA’’ or ‘‘Act’’). 

DATES: Petitions for review must be filed 

by March 7, 2025. 

ADDRESSES: EPA has established a 

docket for this action under Docket ID 

EPA–HQ–OAR–2023–0151. All 

documents relied upon in making this 

decision, including those submitted to 

EPA by CARB, are contained in the 

public docket. Publicly available docket 

materials are available either 

electronically through 

www.regulations.gov or in hard copy at 

the EPA Docket Center, WJC West 

Building, Room 3334, 1301 Constitution 

Avenue NW, Washington, DC 20004. 

The Docket Center’s hours of operation 

are 8:30 a.m. to 4:30 p.m.; generally, it 

is open Monday through Friday, except 

Federal holidays. The electronic mail 

(email) address for the EPA Docket is: aand-r-Docket@epa.gov. An electronic 

version of the public docket is available 

through the Federal government’s 

electronic public docket and comment 

system. You may access EPA dockets at 

http://www.regulations.gov. After 

opening the www.regulations.gov 

website, enter EPA–HQ–OAR–2023– 

0151 in the ‘‘Enter Keyword or ID’’ fillin box to view documents in the record. 

Although a part of the official docket, 

the public docket does not include 

Confidential Business Information 

(‘‘CBI’’) or other information whose 

disclosure is restricted by statute. 

EPA’s Office of Transportation and 

Air Quality (‘‘OTAQ’’) maintains a web 

page that contains general information 

on its review of California waiver and 

authorization requests. Included on that 

page are links to prior waiver Federal 

Register notices, some of which are 


khammond on DSK9W7S144PROD with NOTICES