38076 Federal Register / Vol. 86, No. 135 / Monday, July 19, 2021 / Notices 

name, mailing address, and an email 

address or other contact information in 

the body of your comment. This ensures 

that you can be identified as the 

submitter of the comment and allows 

EPA to contact you in case EPA cannot 

read your comment due to technical 

difficulties or needs further information 

on the substance of your comment. Any 

identifying or contact information 

provided in the body of a comment will 

be included as part of the comment that 

is placed in the official public docket 

and made available in EPA’s electronic 

public docket. If EPA cannot read your 

comment due to technical difficulties 

and cannot contact you for clarification, 

EPA may not be able to consider your 

comment. 

Use of the https://

www.regulations.gov website to submit 

comments to EPA electronically is 

EPA’s preferred method for receiving 

comments. The electronic public docket 

system is an ‘‘anonymous access’’ 

system, which means EPA will not 

know your identity, email address, or 

other contact information unless you 

provide it in the body of your comment. 

Please ensure that your comments are 

submitted within the specified comment 

period. Comments received after the 

close of the comment period will be 

marked ‘‘late.’’ EPA is not required to 

consider these late comments. 

Gautam Srinivasan, 

Associate General Counsel. 

[FR Doc. 2021–15240 Filed 7–16–21; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OAR–2020–0599; FRL–8194–02– 

OAR] 

Notice of Final Approval for an 

Alternative Means of Emission 

Limitation 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice; final approval. 

SUMMARY: This action announces the 

Environmental Protection Agency (EPA) 

approval of the request by Rohm and 

Haas Chemicals LLC, a subsidiary of 

The Rohm and Haas Chemical Company 

(Rohm and Haas), under the Clean Air 

Act (CAA) for an alternative means of 

emission limitation (AMEL) for the 

Standards of Performance for Volatile 

Organic Liquid Storage Vessels. The 

AMEL applies to a proposed new vinyl 

acetate bulk storage tank to be used at 

its chemical plant in Kankakee, Illinois. 

The EPA received no adverse comments 

on the request. This approval document 

specifies the operating conditions and 

monitoring, recordkeeping, and 

reporting requirements that this facility 

must follow to demonstrate compliance 

with the approved AMEL. 

DATES: The approval of the AMEL 

request from Rohm and Haas to operate 

its storage tank in Kankakee, Illinois, as 

specified in this document, is effective 

on July 19, 2021. 

ADDRESSES: The EPA has established a 

docket for this action under Docket ID 

No. EPA–HQ–OAR–2020–0599. All 

documents in the docket are listed on 

the https://www.regulations.gov/ 

website. Although listed, some 

information is not publicly available, 

e.g., Confidential Business Information 

or other information whose disclosure is 

restricted by statute. Certain other 

material, such as copyrighted material, 

is not placed on the internet and will be 

publicly available only in hard copy 

form. Publicly available docket 

materials are available either 

electronically through https://

www.regulations.gov/. 

Out of an abundance of caution for 

members of the public and our staff, the 

EPA Docket Center and Reading Room 

are closed to the public, with limited 

exceptions, to reduce the risk of 

transmitting COVID–19. Our Docket 

Center staff will continue to provide 

remote customer service via email, 

phone, and webform. For further 

information and updates on EPA Docket 

Center services, please visit us online at 

https://www.epa.gov/dockets. The EPA 

continues to carefully and continuously 

monitor information from the Center for 

Disease Control, local area health 

departments, and our Federal partners 

so that we can respond rapidly as 

conditions change regarding COVID–19. 

FOR FURTHER INFORMATION CONTACT: For 

questions about this final action, contact 

Ms. Angie Carey, Sector Policies and 

Programs Division (E143–01), Office of 

Air Quality Planning and Standards, 

U.S. Environmental Protection Agency, 

Research Triangle Park, North Carolina 

27711; telephone number: (919) 541– 

2187; fax number: (919) 541–0516; and 

email address: carey.angela@epa.gov. 

SUPPLEMENTARY INFORMATION: Preamble 

acronyms and abbreviations. We use 

multiple acronyms and terms in this 

preamble. While this list may not be 

exhaustive, to ease the reading of this 

preamble and for reference purposes, 

the EPA defines the following terms and 

acronyms here: 

AMEL alternative means of emission 

limitation 

CAA Clean Air Act 

CFR Code of Federal Regulations 

EPA Environmental Protection Agency 

HAP hazardous air pollutant(s) 

NESHAP national emission standards 

for hazardous air pollutants 

NSPS new source performance 

standards 

OAQPS Office of Air Quality Planning 

and Standards 

PRD pressure relief device 

PRV pressure relief valve 

VAM vinyl acetate monomer 

VOC volatile organic compound(s) 

Organization of this document. The 

information in this document is 

organized as follows: 

I. Background 

II. Summary of Public Comments on the 

AMEL Request 

III. AMEL for the Storage Tank 

I. Background 

On February 8, 2021, the EPA 

provided public notice and solicited 

comment on the request under section 

111(h)(3) of the CAA by Rohm and Haas 

for an alternative means of emission 

limitation (AMEL) for the Standards of 

Performance for Volatile Organic Liquid 

Storage Vessels, 40 CFR part 60 subpart 

Kb, 40 CFR 60.112b, that would apply 

to a proposed new vinyl acetate bulk 

storage tank to be used at its chemical 

plant in Kankakee, Illinois (see 86 FR 

8618). The volatile organic compound 

(VOC) standards at 40 CFR 60.112b were 

established as work practice standards 

pursuant to CAA section 111(h)(1). For 

standards established according to that 

provision, CAA section 111(h)(3) allows 

the EPA to permit the use of an AMEL 

by a source if, after notice and 

opportunity for public hearing, it is 

established to the Administrator’s 

satisfaction that such AMEL will 

achieve emissions reductions at least 

equivalent to the reductions required 

under the applicable CAA section 

111(h)(1) standards. NSPS subpart Kb 

also includes specific regulatory 

provisions (i.e., 40 CFR 114b) allowing 

sources to request an AMEL for the VOC 

standards at 40 CFR 60.112b. 

In the initial notice, the EPA solicited 

comment on all aspects of the AMEL 

request, including the operating 

conditions specified in that document 

that are necessary to achieve a reduction 

in emissions of volatile organic 

compounds at least equivalent to the 

reductions required by 40 CFR 60.112b. 

Rohm and Haas intends to replace the 

existing vinyl acetate monomer (VAM) 

(CAS 108–05–4) tank (TK–72) with the 

proposed bulk storage tank. 

Rohm and Haas included in its AMEL 

application information to demonstrate 

that the proposed bulk storage tank, 

through its vapor balancing system and 


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Federal Register / Vol. 86, No. 135 / Monday, July 19, 2021 / Notices 38077 

pressure containment design, will 

achieve a reduction in emissions at least 

equivalent to the reduction in emissions 

achieved by the VOC standards at 40 

CFR 60.112b. Rohm and Haas’s AMEL 

request was submitted on June 17, 2020. 

For Rohm and Haas’s AMEL request, 

including any supporting materials 

Rohm and Haas submitted, see Docket 

ID No. EPA–HQ–OAR–2020–0599. 

This action finalizes our approval of 

this AMEL request. Section II 

summarizes the comments received on 

the request and our responses thereto. 

Section III sets forth the final operating 

conditions EPA has established for the 

proposed bulk storage tank as part of 

this AMEL approval. 

II. Summary of Public Comments on the 

AMEL Request 

The Agency received comments from 

only one commenter (Rohm and Haas) 

on this action. The comments pertain to 

the operating conditions for assuring 

equivalency that were specified section 

III of the initial notice. The comments 

and our response thereto are 

summarized below. 

A. Comment on Paragraph (3)—EPA 

Method 21 Monitoring Requirements 

Paragraph 3 of the operating 

conditions in the initial notice stated 

that at the Rohm and Haas facility, each 

of the PRDs and components of the 

vapor collection system on the tank 

must be monitored on a quarterly basis, 

using EPA Method 21, and that an 

instrument reading of 500 parts-permillion by volume or greater is an 

excess emission event. 

Rohm and Haas requests that EPA 

classify an instrument reading of ≥500 

ppmv as a leak instead of an excess 

emission event, thereby following the 

National Emission Standards for 

Organic Hazardous Air Pollutants 

(NESHAP) from the Synthetic Organic 

Chemical Manufacturing Industry for 

Process Vents, Storage Vessels, Transfer 

Operations, and Wastewater, 40 CFR 

part 63, subpart G. As mentioned in the 

initial notice, in support of its AMEL 

request, Rohm and Haas stated that the 

proposed tank would comply with the 

vapor balancing requirements in 

NESHAP subpart G, 40 CFR 63.119(g) to 

confirm proper vapor balancing. See 86 

FR 8618 (February 8, 2021). 40 CFR 

63.119(g)(5) identifies an instrument 

reading of ≥500 ppmv as a leak, which 

triggers a requirement to repair as soon 

as practicable but no later than 5 days 

after detection. Rohm and Haas states in 

its comment that this change would be 

consistent with 40 CFR 63.119(g). 

The Agency declines to adopt this 

suggested revision for the following 

reason. The EPA equivalency 

determination is based on the closed 

vent system being closed and not 

leaking under any circumstances. To 

ensure equivalency, the Agency is 

requiring that no detectable emissions 

occur from PRDs and components of the 

vapor collection system on the tank; 

accordingly, any leak would be an 

excess emission. Therefore, the EPA has 

not made the change requested by the 

commenter. 

B. Comment on Paragraph (4)— 

Clarification on Welded Steel Piping 

Rohm and Haas’s second comment 

requests clarification on paragraph 4 of 

the operating conditions in the initial 

document, specifically the requirement 

that ‘‘VAM must be transferred from 

either railcars or truck trailers via 

welded steel piping into the new bulk 

storage tank. The tank must be equipped 

with a welded steel vapor balance line 

that returns displaced vinyl acetate 

vapors from the headspace within the 

tank to the railcar or tank truck during 

tank filling operations.’’ 

Rohm and Haas states that they intend 

for the piping to be welded steel piping 

but notes that there will be a minimal 

number of necessary flanged 

connections, flanged valves, and flexible 

coupling lines for the unloading line 

and for the vapor balance line. The 

Agency does not believe, and Rohm and 

Hass do not claim, that the operating 

conditions in paragraph 4 cannot be met 

or otherwise need to be changed 

because of the presence of these flanged 

connections, flanged valves, and flexible 

coupling lines. The EPA is therefore 

finalizing the requirements in paragraph 

4 as specified in the initial notice, and 

we are adding a statement in the 

paragraph acknowledging that ‘‘there 

will be a number of necessary flanged 

connections, flanged valves, and flexible 

coupling lines as part of the vapor 

balance line.’’ 

C. Comment on Paragraph (6)— 

Recordkeeping Requirements 

Rohm and Haas’s next comment is on 

paragraph 6 of the operating conditions 

in the initial notice, which states that, 

‘‘The facility must keep a record of the 

equipment to be used and the 

procedures to be followed when 

reloading the railcar, tank truck, or 

barge and displacing vapors the storage 

tank from which the liquid originates, as 

well as a record of all components of the 

PRDs, including PRVs and rupture 

discs.’’ 

Rohm and Haas’s comment identifies 

certain inaccuracies in paragraph 6 in 

the initial notice. For example, the 

statement incorrectly uses the term 

‘‘reloading’’ in describing the operation 

of unloading vinyl acetate from a railcar 

or tank truck. Rohm and Haas also 

suggest removing the reference to a 

barge because it is not possible to 

unload a barge at this facility. In light 

of the above, we accept Rohm and 

Haas’s suggestion to revise the statement 

to read as follows: ‘‘The facility must 

keep a record of the equipment to be 

used and the procedures to be followed 

when unloading the railcar or tank truck 

and displacing vapors from the storage 

tank to the transport vessel from which 

the liquid originates, as well as a record 

of all components of the PRDs, 

including PRVs and rupture discs.’’ 

C. Comments on Paragraph (7)— 

Reporting Requirements 

Rohm and Haas suggest, and the 

Agency accepts, minor wording changes 

to paragraph 7(a) of the operating 

conditions in the initial notice. 

Rohm and Haas also suggests several 

edits to paragraph 7(b), which requires 

the facility to report ‘‘The date and time 

identifying each period during which 

the continuous monitoring systems were 

inoperative except for zero and span 

checks and the nature of the system 

repairs or adjustments.’’ Rohm and Haas 

requests adding the terms ‘‘pressure’’ 

and ‘‘other required maintenance’’ such 

that the requirement would read as 

follows: ‘‘The date and time identifying 

each period during which the 

continuous pressure monitoring systems 

were inoperative except for zero and 

span checks or other required 

maintenance and the nature of the 

system repairs or adjustments.’’ The 

Agency disagrees with adding the term 

‘‘other required maintenance’’ because it 

is important to include reporting of 

downtime in monitoring to understand 

system upsets, and adding the term 

‘‘other required maintenance’’ would 

limit reporting to only periods of 

required maintenance, thus excluding 

downtime. However, the Agency does 

agree with the change to add the term 

‘‘pressure’’ to specifically refer to the 

‘‘continuous pressure monitoring 

system.’’ This edit accurately reflects 

paragraph 2 of the operating conditions 

below and in the initial notice to only 

require pressure to be monitored. 

Lastly, Rohm and Haas suggests 

adding ‘‘in this section’’ to Paragraph 

7(d) so that it reads: ‘‘When the 

continuous pressure monitoring systems 

have not been inoperative, repaired, or 

adjusted, such information shall be 

stated in this section of the report.’’ The 

Agency interprets the comment to 

request that the information required in 

paragraph 7(d) be reported in the storage 

tank section of semiannual compliance 


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38078 Federal Register / Vol. 86, No. 135 / Monday, July 19, 2021 / Notices 

reports for this facility. The Agency 

does not object to making this addition. 

III. AMEL for the Storage Tank 

The EPA is approving the AMEL 

request by Rohm and Haas. Based upon 

our review of the AMEL request, the 

Agency believes that, by complying 

with the operating conditions specified 

in the following paragraphs, the 

proposed new tank at the Rohm and 

Haas Chemicals LLC facility will 

achieve emission reductions at least 

equivalent to reduction in emissions 

required by NSPS subpart Kb, 40 CFR 

60.112b: 

(1) No PRD on the storage tank, or on 

the railcar or tank truck, shall open 

during loading or as a result of diurnal 

temperature changes (breathing losses). 

(2) Both PRDs on the storage tank 

must be set to release at no less than 9 

psig at all times. Any release from a PRD 

as indicated by pressure reading greater 

than 9 psig is an excess emissions event. 

To demonstrate that the PRD does not 

open, the tank vapor space pressure and 

the space between the rupture disk and 

PRD will be continuously monitored for 

pressure and recorded. If a release 

occurs, the tank must follow 40 CFR 

63.165(d)(2). 

(3) Each of the PRDs and components 

of the vapor collection system on the 

tank must be monitored on a quarterly 

basis, using EPA Method 21. An 

instrument reading of 500 parts per 

million by volume or greater is an 

excess emissions event. 

(4) VAM must be transferred from 

either railcars or truck trailers via 

welded steel piping into the new bulk 

storage tank. The tank must be equipped 

with a welded steel vapor balance line 

that returns displaced vinyl acetate 

vapors from the headspace within the 

tank to the railcar or tank truck during 

tank filling operations. The vapor 

balance line must be hard piped from 

the tank, crossing a pipe bridge, before 

terminating at the off-loading station. 

While there are a number of necessary 

flanged connections, flanged valves, and 

flexible coupling lines as part of the 

vapor balance line, the tank vapor 

balance line must not contain any PRDs 

or release points. Displaced vapors must 

be transferred to a vapor return fitting 

on the offloading bulk vehicle through 

a hose from the offloading station. Both 

the transfer hoses and the vapor balance 

return line must incorporate drydisconnect fittings to prevent vapor 

discharge to the atmosphere when the 

line is not connected. Tank trucks and 

railcars must have a current certification 

in accordance with the DOT pressure 

test requirements of 49 CFR part 180 for 

tank trucks and 49 CFR 173.31 for 

railcars. Railcars or tank trucks that 

deliver VAM to a storage tank must be 

reloaded or cleaned at a facility that 

utilizes the control techniques specified 

in paragraph (4)(a) or (b). 

(a) The railcar or tank truck must be 

connected to a closed-vent system with 

a control device that reduces inlet 

emissions of VAM by 95 percent by 

weight or greater. 

(b) A vapor balancing system 

designed and operated to collect organic 

VAM vapor displaced from the tank 

truck or railcar during reloading must be 

used to route the collected HAP vapor 

to the storage tank from which the 

liquid being transferred originated. 

(5) Rohm and Haas must submit to the 

Administrator a written certification 

that the reloading or cleaning facility 

meets the requirements of paragraph 4; 

and the requirements for closed vent 

system and control device specified at 

40 CFR 63.119 through 63.123. The 

notification and reporting requirements 

at 40 CFR 63.122 do not apply to the 

owner or operator of the offsite cleaning 

or reloading facility. 

(6) Recordkeeping requirements. 

(a) The facility must keep a record of 

the equipment to be used and the 

procedures to be followed when 

unloading the railcar or tank truck and 

displacing vapors from the storage tank 

to the transport vessel from which the 

liquid originates, as well as a record of 

all components of the PRDs, including 

PRVs and rupture discs. 

(b) Records must be kept as long as 

the storage vessel is in operation. 

(7) Reporting requirements. The 

facility must submit excess emissions 

and monitoring systems performance 

reports to the Administrator 

semiannually. All reports must be 

postmarked by the 30th day following 

the end of each 6-month period. Written 

reports of excess emissions must 

include the following information: 

(a) The date and time of 

commencement and completion of each 

time period of excess emissions and the 

process operating time during the 

reporting period. 

(b) The date and time identifying each 

period during which the continuous 

pressure monitoring system was 

inoperative except for zero and span 

checks and the nature of the system 

repairs or adjustments. 

(c) The report must include a list of 

the affected sources or equipment, an 

estimate of the volume of VAM emitted, 

and a description of the method used to 

estimate the emissions. 

(d) When the continuous pressure 

monitoring systems have not been 

inoperative, repaired, or adjusted, such 

information shall be stated in this 

section of the report. 

Dated: July 13, 2021. 

Panagiotis Tsirigotis, 

Director, Office of Air Quality Planning and 

Standards. 

[FR Doc. 2021–15321 Filed 7–16–21; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL 8718–01–R5] 

Public Water System Supervision 

Program Approval for the State of 

Wisconsin 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of tentative approval. 

SUMMARY: Notice is hereby given that 

the Environmental Protection Agency 

(EPA) has tentatively approved the State 

of Wisconsin’s revisions to the State’s 

Public Water System Supervision 

(PWSS) Program under the federal Safe 

Drinking Water Act (SDWA) for 

adoption of the federal Ground Water 

Rule, as well as revisions to the federal 

Surface Water Treatment Rule under the 

Long Term 2 Enhanced Surface Water 

Treatment Rule. The EPA has 

determined that the State’s PWSS 

program regulations and the revisions 

thereto are no less stringent than the 

corresponding federal regulations for 

the Ground Water Rule and the Long 

Term 2 Enhanced Surface Water 

Treatment Rule. Therefore, the EPA 

intends to approve this revision to the 

State of Wisconsin’s Public Water 

System Supervision Program, thereby 

giving the Wisconsin Department of 

Natural Resources primary enforcement 

responsibility for the Ground Water 

Rule and the Long Term 2 Enhanced 

Surface Water Treatment Rule. This 

approval action does not extend to 

public water systems in Indian Country. 

By approving this revision, the EPA 

does not intend to affect the rights of 

federally recognized Indian Tribes in 

Wisconsin, nor does it intend to limit 

existing rights of the State of Wisconsin. 

DATES: Any interested party may request 

a public hearing on this determination. 

A request for a public hearing must be 

submitted by August 18, 2021. The EPA 

Region 5 Administrator may deny 

frivolous or insubstantial requests for a 

hearing. If a substantial request for a 

public hearing is made by August 18, 

2021, EPA Region 5 will hold a public 

hearing, and a notice of such hearing 

will be published in the Federal 

Register and a newspaper of general 


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