```

[Federal Register Volume 89, Number 242 (Tuesday, December 17, 2024)]
[Notices]
[Pages 102137-102138]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-29727]

-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OAR-2015-0341; FRL-12497-01-OAR]

Notice of Availability of One New Chapter in the Environmental 
Protection Agency's Air Pollution Control Cost Manual--Dry Sorbent 
Injection

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of availability and public comment period.

-----------------------------------------------------------------------

SUMMARY: The Environmental Protection Agency (EPA) is providing notice 
that we are adding one chapter to the current EPA Air Pollution Control 
Cost Manual (henceforth, Control Cost Manual). The EPA is requesting 
comment on: Chapter 2, Section 5, ``Dry Sorbent Injection.'' This new 
Control Cost Manual chapter covers control measures for sulfur dioxide 
(SO2) and acid gas emissions.

DATES: Comments must be received on or before March 17, 2025. Please 
refer to SUPPLEMENTARY INFORMATION for additional information on 
submitting comments on the provided data.

ADDRESSES: You may send comments, identified by Docket ID No. EPA-HQ-
OAR-2015-0341, by any of the following methods:
     Federal eRulemaking Portal: http://www.regulations.gov/ 
(our preferred method). Follow the online instructions for submitting 
comments.
     Mail: U.S. Environmental Protection Agency, EPA Docket 
Center, Docket No. EPA-HQ-OAR-2015-0341, Office of Air and Radiation 
Docket, Mail Code 28221T, 1200 Pennsylvania Avenue NW, Washington, DC 
20460.
     Hand Delivery or Courier: EPA Docket Center, WJC West 
Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004. 
The Docket Center's hours of operations are 8:30 a.m. to 4:30 p.m., 
Monday through Friday (except Federal Holidays).
    Instructions: All submissions received must include the Docket ID 
No. for this action. Comments received may be posted without change to 
https://www.regulations.gov/, including any personal information 
provided. For detailed instructions on sending comments and additional 
information on the rulemaking process, see the ``Public Participation'' 
heading of the SUPPLEMENTARY INFORMATION section of this document.

FOR FURTHER INFORMATION CONTACT: Larry Sorrels, Health and 
Environmental Impacts Division, Office of Air Quality Planning and 
Standards, Environmental Protection Agency, C439-02, 109 T.W. Alexander 
Drive, Research Triangle Park, NC 27709; telephone number: (919) 541-
5041; email address: [email protected].

SUPPLEMENTARY INFORMATION: The EPA is requesting comment on the 
specific Control Cost Manual chapter included in this notice.
    Written Comments: Submit your comments, identified by Docket ID No. 
EPA-HQ-OAR-2015-0341, at https://www.regulations.gov (our preferred 
method), or the other methods identified in the ADDRESSES section. Once 
submitted, comments cannot be edited or removed from the docket. The 
EPA may publish any comment received to its public docket. Do not 
submit to EPA's docket at https://www.regulations.gov any information 
you consider to be Confidential Business Information (CBI), Proprietary 
Business Information (PBI), or other information whose disclosure is 
restricted by statute. Multimedia submissions (audio, video, etc.) must 
be accompanied by a written comment. The written comment is considered 
the official comment and should include discussion of all points you 
wish to make. The EPA will generally not consider comments or comment 
contents located outside of the primary submission (i.e., on the web, 
cloud, or other file sharing system). Please visit https://www.epa.gov/dockets/commenting-epa-dockets for additional submission methods; the 
full EPA public comment policy; information about CBI, PBI, or 
multimedia submissions; and general guidance on making effective 
comments.

I. General Information

A. What should I consider as I prepare my comments for the EPA?

    1. Submitting CBI. Do not submit this information to the EPA 
through www.regulations.gov or email. Clearly mark the part or all of 
the information that you claim to be CBI. For CBI information in a disk 
or CD-ROM that you mail to the EPA docket office, mark the outside of 
the disk or CD-ROM as CBI and then identify electronically within the 
disk or CD-ROM the specific information that is claimed as CBI. In 
addition to one complete version of the comment that includes 
information claimed as CBI, a copy of the comment that does not contain 
the information claimed as CBI must be submitted for inclusion in the 
public docket. Information so marked will not be disclosed except in 
accordance with procedures set forth in 40 Code of Federal Regulation 
(CFR) part 2.
    2. Tips for Preparing your Comments. When submitting comments, 
remember to: Identify the notification by docket number and other 
identifying information (subject heading, Federal Register date and 
page number).
     Follow directions--The agency may ask you to respond to 
specific questions or organize comments by referencing a CFR part or 
section number.
     Explain why you agree or disagree; suggest alternatives 
and substitute language/data for your requested changes.
     Describe any assumptions and provide any technical 
information and/or data that you used.
     If you estimate potential costs or burdens, explain how 
you arrived at your estimate in sufficient detail to allow for it to be 
reproduced.
     Provide specific examples to illustrate your concerns and 
suggest alternatives.
     Explain your views as clearly as possible, avoiding the 
use of profanity or personal threats.
     Make sure to submit your comments by the comment period 
deadline identified.

II. Information Available for Public Comment

    The EPA is requesting comment on one new chapter of the EPA Air

[[Page 102138]]

Pollution Control Cost Manual. The Control Cost Manual contains 
individual chapters on emissions control measures, including data and 
equations to aid users in estimating capital costs for installation and 
annual costs for operation and maintenance of these measures, and data 
concerning the percentage of pollutant emissions that control measures 
can reduce. The Control Cost Manual is used by the EPA for estimating 
the impacts of rulemakings and serves as a basis for sources to 
estimate costs of controls that are Best Available Control Technology 
(BACT) under the New Source Review Program, the Regional Haze Program, 
Reasonably Achievable Control Technology (RACT) for State 
Implementation Plans (SIPs) and for other programs.
    The one updated Control Cost Manual chapter is: Chapter 2, Section 
5, ``Dry Sorbent Injection.'' This revised Control Cost Manual chapter 
can be found in the docket for the Control Cost Manual update (Docket 
ID No. EPA-HQ-OAR-2015-0341). The current Control Cost Manual version 
(sixth edition) is available at https://www.epa.gov/economic-and-cost-analysis-air-pollution-regulations/cost-reports-and-guidance-air-pollution#cost%20manual, and last updated in 2003.
    The Consolidated Appropriations Act of 2014 requested that the EPA 
begin development of a seventh edition of the Control Cost Manual. The 
EPA has met with state, local, and Tribal officials to discuss plans 
for the Control Cost Manual update as called for under the Consolidated 
Appropriations Act of 2014. The EPA has met with other groups as well 
at their request. Since 2014, the EPA has updated the selective non-
catalytic reduction (SNCR) and selective catalytic reduction (SCR) 
chapters, the first two chapters (Chapter 1, Section 4; Chapter 2, 
Section 4, respectively) completed for the seventh edition of the 
Control Cost Manual and made them available to the public in May 2016 
(81 FR 38702, June 14, 2016) and also updated these chapters again in 
May 2019. In addition, the EPA has updated the Refrigerated Condensers 
(Chapter 1, Section 3 and Section 3.1) and Incinerators (Chapter 2, 
Section 3, Section 3.2, now Incinerators/Oxidizers) chapters in 
November 2017, the Cost Estimation: Concepts and Methodology chapter 
(Chapter 2, Section 1) as of November 2017, the Carbon Adsorbers 
(Chapter 1, Section 3, Section 3.1) and Flares (Chapter 1, Section 3, 
Section 3.2) chapters in October 2018, and the Gas Absorbers (now Wet 
and Dry Scrubbers for Acid Gas, Chapter 1, Section 5) chapter in May 
2021. Finally, the EPA is currently updating the Fabric Filters 
(Chapter 1, Section 6) chapter, with the expected date for its 
finalization to be in 2025.
    To help focus review of the Dry Sorbent Injection chapter, we offer 
the following list of questions that the EPA is particularly interested 
in addressing in this new Control Cost Manual chapter. Regardless of 
the topics that are covered in this list of questions, commenters are 
welcome to address any aspects of this chapter. Please provide 
supporting data for responses to these questions and for other comments 
on the chapter.
For the Dry Sorbent Injection Chapter
    (1) What is a reasonable and up-to-date estimate of equipment life 
(defined as design or operational life) for dry sorbent injection (or 
DSI) systems--that is, an entire DSI system? Please provide data, if 
possible, on accurate estimates of equipment life.
    (2) Are the descriptions of and technical background on DSI 
complete, up to date, and accurate with regard to control of 
SO2 and acid gas? Please provide information, if possible, 
on descriptions of and background on control by DSI of SO2 
and acid gases if you do not believe that the descriptions in the draft 
chapter are complete, up to date, and accurate.
    (3) Is the applicability of DSI to various types of emissions 
sources complete, up to date, and accurate?
    (4) Are the estimates of SO2 removal or control 
efficiency for DSI accurate and up-to-date? If not, what are more 
accurate estimates? Please provide data, if possible, to address 
inaccuracies. Please offer the same for acid gas (e.g., hydrogen 
chloride (HCl)) removal or control efficiency.
    (5) Is the information accurate on how DSI operate in tandem with 
control technologies such as fabric filters and electrostatic 
precipitators (ESP) to reduce particulate matter (PM) and activated 
carbon injection (ACI) to reduce mercury? Please provide data, if 
possible, to address inaccuracies.
    (6) Are the capital cost correlations, factors, and equations for 
DSI applied to various types of emissions sources and industries 
accurate and up to date? If not, how should they be revised? Please 
provide data, if possible, to address inaccuracies.
    (7) Are the annual costs (such as operating and maintenance costs) 
for DSI applied to various types of emissions sources and industries 
accurate and up-to-date? In particular, are the sorbent data, both 
types of sorbent and sorbent prices, for use in DSI accurate and up-to-
date? If not, how should they be revised? Please provide data, if 
possible, to address inaccuracies.
    (8) How can neural networks and computational fluid dynamics be 
used, separately or integrated, to enhance the design and optimization 
of DSI for improved SO2 and acid gas control efficiency and 
overall efficiency? What are the costs of including such techniques in 
the design and operation of DSI?

Erika N. Sasser,
Director, Health and Environmental Impacts Division.
[FR Doc. 2024-29727 Filed 12-16-24; 8:45 am]
BILLING CODE 6560-50-P
```