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Federal Register / Vol. 86, No. 24 / Monday, February 8, 2021 / Notices
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result in a reduction in emissions equivalent to or better than the amount achieved by the VOC standards set forth in 40 CFR 60.112b of NSPS subpart Kb.
Rohm and Haas, therefore, asks that the EPA approve this AMEL request.
III. AMEL for the Rohm and Haas Chemicals LLC Facility Based upon our review of the AMEL
request, we believe that, by complying with the operating conditions specified below, the proposed new tank at Dows 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. We are seeking the publics input on this request. Specifically, the EPA seeks the publics input on the conditions specified in this document in the following paragraphs.
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
63.165d2.
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.
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 dry-disconnect fittings to prevent vapor discharge to the atmosphere when the line is not connected. Tank trucks and railcars must have a current certification in
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accordance with the DOT pressure test requirements of 49 CFR part 180 for tank trucks and 49 CFR 173.31 for railcars. Railcars, tank trucks, or barges that deliver VAM to a storage tank must be reloaded or cleaned at a facility that utilizes the control techniques specified in paragraph 4a or b.
a The railcar, tank truck, or barge 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 reloading the railcar, tank truck, or barge and displacing vapors to the storage tank from which the liquid originates, as well as a record of all components of the PRDs, including PRVs and rupture disks.
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. The process operating time during the reporting period.
b The date and time identifying each period during which the continuous 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.

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d When the continuous pressure monitoring systems have not been inoperative, repaired, or adjusted, such information shall be stated in the report.
IV. Request for Comments We solicit comments on all aspects of Rohm and Haass requests for approval of an AMEL for these new requirements to be used to comply with the applicable standards. We specifically seek comment regarding whether or not the operating requirements listed in section III above will achieve emission reductions at least equivalent to emissions being controlled by complying with the applicable requirements in the 40 CFR part 60, subpart Kb, Standards of Performance for Volatile Organic Liquid Storage Vessels requirements in 40 CFR
60.112b.
Dated: December 8, 2020.
Panagiotis Tsirigotis, Director, Office of Air Quality Planning and Standards.
FR Doc. 202102518 Filed 2521; 8:45 am BILLING CODE 656050P

ENVIRONMENTAL PROTECTION
AGENCY
EPAHQOPPT20190271; FRL10005
44

Certain New Chemicals or Significant New Uses; Statements of Findings for September Through December 2019
Environmental Protection Agency EPA.
ACTION: Notice.
AGENCY:

The Toxic Substances Control Act TSCA requires EPA to publish in the Federal Register a statement of its findings after its review of certain TSCA
notices when EPA makes a finding that a new chemical substance or significant new use is not likely to present an unreasonable risk of injury to health or the environment. Such statements apply to premanufacture notices PMNs, microbial commercial activity notices MCANs, and significant new use notices SNUNs submitted to EPA
under TSCA. This document presents statements of findings made by EPA on such submissions during the period from September 1, 2019 to December 31, 2019.
FOR FURTHER INFORMATION CONTACT:
For technical information contact:
Rebecca Edelstein, New Chemicals Division 7405M, Office of Pollution Prevention and Toxics, Environmental Protection Agency, 1200 Pennsylvania Ave. NW, Washington, DC 204600001;
SUMMARY:

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