Federal Register - February 9, 2021
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Source: Federal Register
8738
Federal Register / Vol. 86, No. 25 / Tuesday, February 9, 2021 / Proposed Rules
TABLE 12014 TYPICAL SUMMER DAY VOC AND NOX EMISSIONS tons/day FOR YORK-ADAMS AREAContinued County
Source category
Total
The data shown in Table 1 is based on the 2014 National Emissions Inventory NEI version 2.10 The inventory addresses four anthropogenic emission source categories: Stationary point sources, stationary nonpoint area sources, nonroad mobile, and onroad mobile sources. Point sources are stationary sources that have the potential to emit PTE more than 100
tons per year tpy of VOC, or more than 50 tpy of NOX, and which are required to obtain an operating permit. Data are collected for each source at a facility and reported to PADEP. Examples of point sources include kraft mills, electrical generating units EGUs, and pharmaceutical factories. Nonpoint sources include emissions from equipment, operations, and activities that are numerous and in total have significant emissions. Examples include emissions from commercial and consumer products, portable fuel containers, home heating, repair, and refinishing operations, and crematories.
The onroad emissions sector includes emissions from engines used primarily to propel equipment on highways and other roads, including passenger vehicles, motorcycles, and heavy-duty diesel trucks. The nonroad emissions sector includes emissions from engines that are not primarily used to propel transportation equipment, such as generators, forklifts, and marine pleasure craft. EPA reviewed the emissions inventory submitted by PADEP and proposes to conclude that
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10 The NEI is a comprehensive and detailed estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources. The NEI is released every three years based primarily upon data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by EPA.
VerDate Sep<11>2014
16:53 Feb 08, 2021
Jkt 253001
22.55
8.15
3.66
6.18
15.33
4.70
48.31
67.25
B. Maintenance Demonstration In order to attain the 1997 ozone NAAQS, the three-year average of the fourth-highest daily average ozone concentrations design value or DV at each monitor within an area must not exceed 0.08 ppm. Based on the rounding convention described in 40
CFR part 50, appendix I, the standard is attained if the DV is 0.084 ppm or below. CAA section 175A requires a demonstration that the area will continue to maintain the NAAQS
throughout the duration of the requisite maintenance period. Consistent with the prior guidance documents discussed previously in this document as well as EPAs November 20, 2018 Resource Document for 1997 Ozone NAAQS
Areas: Supporting Information for States Developing Maintenance Plans 2018
Resource Document,11 EPA believes that if the most recent DV for the area is well below the NAAQS e.g. below 85%, or in this case below 0.071 ppm, the section 175A demonstration requirement has been met, provided that Prevention of Significant Deterioration PSD requirements, any control measures already in the SIP, and any Federal measures remain in place through the end of the second 10-year maintenance period absent a showing consistent with section 1101 that such 11 This resource document is included in the docket for this rulemaking available online at https www.regulations.gov, Docket ID: EPAR03
OAR20200319 and is also available at https
www.epa.gov/sites/production/files/2018-11/
documents/ozone_1997_naaqs_lmp_resource_
document_nov_20_2018.pdf.
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Fmt 4702
Sfmt 4702
NOX emissions
Nonpoint
Onroad
Nonroad
the plans inventory is acceptable for the purposes of a subsequent maintenance under CAA section 175Ab.
PO 00000
VOC emissions
measures are not necessary to assure maintenance.
For the purposes of demonstrating continued maintenance with the 1997
ozone NAAQS, PADEP provided 3-year DVs for the York-Adams Area from 2007
to 2018. This includes DVs for 2005
2007, 20062008, 20072009, 2008
2010, 20092011, 20102012, 2011
2013, 20122014, 20132015, 2014
2016, 20152017, and 20162018, which are shown in Table 2 of this document.12 In addition, EPA has reviewed the most recent ambient air quality monitoring data for ozone in the York-Adams Area, as submitted by Pennsylvania and recorded in EPAs Air Quality System AQS. The most recent DV i.e. 20172019 at monitors located in the York-Adams Area are also shown in Table 2.13 There currently are four operating monitoring sites in the YorkAdams Area, two in York County and two in Adams County. Please note that a third monitor in Adams County monitor 420010002, was discontinued on July 31, 2011. As can be seen in Table 2 of this document, DVs at all monitors located in the YorkAdams Area have been well below 85%
of the 1997 ozone NAAQS i.e., 0.071
ppm since the 20122014 period. The highest DV for the 20172019 period at a monitor in the York-Adams Area is 0.064 ppm, which is well below 85% of the 1997 ozone NAAQS.
12 See also Table II2 of PADEPs March 10, 2020
submittal, included in the docket for this rulemaking available online at https
www.regulations.gov, Docket ID: EPAR03OAR
20200319.
13 This data is also included in the docket for this rulemaking available online at https
www.regulations.gov, Docket ID: EPAR03OAR
20200319 and is also available at https
www.epa.gov/air-trends/air-quality-designvaluesreport.
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