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Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules Therefore, the negative declaration is still valid and appropriate for this CTG
category.
Natural Gas/Gasoline Processing Plants On November 14, 1985, Illinois submitted to EPA a negative declaration letter for the Natural Gas/Gasoline Processing Plant industry. Illinois determined that there were no sources of any size in this source category in the Illinois portion.
Illinois reviewed its most recent inventory to determine if any sources fall under this category. There were 35
sources that required further review.
One source SIC 1321 does have emission units that fall under the CTG.
This source was built after Illinois negative declaration for this CTG
category and is subject to the control requirements in the New Source Performance Standard NSPS 40 CFR
60 subpart KKK Standards of Performance for Equipment Leaks of VOC from Onshore Natural Gas Processing Plants. The NSPS standards and control requirements are equivalent to or more stringent than the CTG
requirements.
The other 34 sources SIC 4922, 4923, and 4924 are natural gas pipelines that are used to transport gas across Illinois to nearby states. None of these sources have emission units that fall under this CTG category. Therefore, the negative declaration/RACT certification is still valid and appropriate for the CTG
category.
Aerospace Manufacturing and Rework Facilities On October 11, 1996, Illinois submitted to EPA a negative declaration letter for the Aerospace Manufacturing and Rework Operations CTG. This CTG
applies to sources in this category with potential emissions greater than or equal to 25 tons of VOC per year. Illinois determined that there were no such sources in the Illinois portion.
Illinois reviewed its most recent inventory to determine if any sources fall under this category. Illinois found 11 sources under SIC codes 3728, 4512, 4581, and 9711. None of these sources have emission units that fall under this CTG category. Therefore, the negative declaration is still valid and appropriate for the CTG category.
High-Density Polyethylene, Polypropylene, and Polystyrene Resins The Control of Volatile Organic Compound Emissions from Manufacture of High-Density Polyethylene, Polypropylene, and Polystyrene Resins CTG covers the manufacture of those three materials. Illinois previously
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submitted a negative declaration to EPA
that applied to two of those materials, Polyethylene and Polypropylene, and certified that there were no sources manufacturing those materials in the Illinois portion. The third material, Polystyrene, is regulated by State RACT
rules in Part 218 subpart BB:
Polystyrene Plants.
Illinois reviewed its most recent inventory and confirmed that no sources fall under the four SIC codes 2821, 2822, 2823, and 2824 for this CTG
category for the manufacture of polyethylene and polypropylene. There are two sources out of 11 under SIC
2821 that manufacture polystyrene resin and are subject to Part 218 subpart BB
Polystyrene Plants, the current RACT
rule in Illinois. Therefore, the negative declaration/RACT certification is still valid and appropriate for the CTG
category.
Vegetable Oil Processing Illinois determined there were no such sources in the Illinois portion.
Illinois reviewed its most recent inventory to determine if any sources fall under this category and found one source that required further review. This source is subject to the control requirements in the NESHAP 40 CFR 63
subpart GGGG for Solvent Extraction for Vegetable Oil Production.
The NESHAP standards for control are equivalent to or more stringent than the outdated former CTG. Thus, the negative declaration/RACT certification is still valid and appropriate.
Oil and Natural Gas Industry On December 5, 2018 Illinois submitted to EPA a negative declaration for the Oil and Natural Gas Industry, which is the subject of the October 20, 2016 CTG. Illinois reviewed the Chicago-Naperville, IL-IN-WI
nonattainment area emission inventory and performed assessments for sources and units that might require additional regulation pursuant to the Oil and Gas CTG. Illinois found no oil or gas producing wells, and found no sources or units affected by this CTG in the Illinois portion for which a SIP revision is necessary to achieve RACT level control. Most of the sources identified in the oil and gas industry in the Illinois portion are involved exclusively in the processing, transmission and distribution of oil and gas. Sources and units that were found to be potentially affected by the Oil and Gas CTG were found to be exempt and are already controlled by Federal and/or State regulations that include requirements more stringent than the CTG RACT

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requirements. Thus, the negative declaration/RACT certification is valid.
Industrial Wastewater EPA issued a draft CTG for the industrial wastewater category in September 1992. However, because this CTG was never finalized, industrial wastewater sources are considered to be non-CTG VOC sources. Industrial wastewater is a category that is not covered by the Illinois non-CTG VOC
RACT rules.
On December 23, 1999, Illinois submitted to EPA a negative declaration letter for the Illinois portion covering industrial wastewater sources. At that time, Illinois determined that all sources in the Illinois portion to which the draft CTG would be applicable were covered by other regulations that were as stringent or more stringent than the draft CTG. Those sources were two refineries and one chemical plant that were subject to Federal regulations covering waste operations.
Illinois reviewed its most recent inventory to determine if any sources fall under the industrial wastewater category, including: Organic chemicals, plastics, and synthetic fibers;
pharmaceuticals; pesticides manufacturing; petroleum refining;
pulp, paper, and paperboard mills; and hazardous waste treatment, storage, and disposal facilities. Illinois found 54
sources that required further review.
Illinois examined each unit at these sources and the operating permits of those sources to determine whether a source was a significant source of wastewater or if the draft CTG was potentially applicable to a source or unit. Of those 54 sources, it was determined that the draft CTG would be applicable to only six sources. It was found that all subject sources were covered under the NESHAP 40 CFR 63
subpart G, the NESHAP 40 CFR 63
subpart FFFF, or by Part 218 subpart C, all of which are equivalent or more stringent than the draft CTG.
EPA requested additional information for twelve industrial wastewater sources that were identified as potentially being subject to non-CTG VOC RACT based on historical emissions. On April 30, 2020, Illinois submitted supplementary information demonstrating that either the existing levels of control represent RACT RACT equivalence or that the sources potential to emit VOC are below the 100 TPY non-CTG VOC
moderate area major source threshold and thus the sources are not subject to non-CTG VOC RACT.
The twelve sources that the EPA
evaluated include the following refineries and chemical plants: Ester
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