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Federal Register / Vol. 86, No. 7 / Tuesday, January 12, 2021 / Proposed Rules
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information system that provides information on ridesharing and directs drivers to other regional resources for carpools and vanpools,52 and programs for improved public transit,53 including improvements and maintenance for bus stops and shelters.
As explained above, the District identified potential candidate measures for RACM based upon categories with high NOX and VOC emissions and relevant local or state measures. This analysis was included in the Districts commitment letter for contingency measures and is further described in Section III.F.2. Based on its evaluation of all available measures and the NOXlimited nature of the nonattainment area, the District concludes that the Districts existing rules for stationary and area sources are generally as stringent as, or more stringent than the analogous rules in other districts.
Further, the District concludes that, based on its comprehensive review and evaluation of potential candidate measures, the District meets the RACM
requirement for the 2008 ozone NAAQS
for all sources under the Districts jurisdiction.
b. CARBs RACM Analysis CARBs RACM analysis is contained in Chapter X as well as Appendices BD of the 2018 Western Nevada County Ozone Plan. CARBs RACM
analysis provides a general description of CARBs existing mobile source programs. A more detailed description of CARBs mobile source control program, including a comprehensive table listing onand off-road mobile source regulatory actions taken by CARB since 1985, is contained in Appendix A. The RACM assessment contains CARBs evaluation of mobile source and other statewide control measures that reduce emissions of NOX
and VOC in Western Nevada County.
Source categories for which CARB has primary responsibility for reducing emissions in California include most new and existing onand off-road engines and vehicles, motor vehicle fuels, and consumer products.
Given the need for substantial emissions reductions from mobile and area sources to meet the NAAQS in California nonattainment areas, CARB
has established stringent control measures for on-road and off-road mobile sources and the fuels that power them. California has authority under CAA section 209 subject to a waiver by the EPA to adopt and implement new emission standards for many categories 52 Transportation 53 Transportation
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of on-road vehicles and engines, and new and in-use off-road vehicles and engines.
CARBs mobile source program extends beyond regulations that are subject to the waiver or authorization process set forth in CAA section 209 to include standards and other requirements to control emissions from in-use heavy-duty trucks and buses, gasoline and diesel fuel specifications, and many other types of mobile sources.
Generally, these regulations have been submitted and approved as revisions to the California SIP.54
CARBs Consumer Products Program has established regulations that limit VOC emissions from 129 consumer product categories, which apply in Western Nevada County.55 The EPA has approved many CARB measures into the California SIP that limit VOC emissions from a wide array of products, including antiperspirants and deodorants, aerosol coating products, and other consumer products.56
CARBs RACM analysis determines that, with the current mobile source program and proposed measures, there are no additional RACM that would advance attainment of the 2008 ozone NAAQS in Western Nevada County. As a result, CARB concludes that Californias mobile source programs fully meet the RACM requirement.57
3. The EPAs Review of the States Submission As described above and in our December 3, 2020 memorandum to file in the docket for this proposed action, the District has implemented rules to reduce VOC and NOX emissions from stationary sources in the Western Nevada nonattainment area. For the 2018 Western Nevada County Ozone Plan, the District indicates that its ozone precursor control strategy focuses on 54 See, e.g., the EPAs approval of standards and other requirements to control emissions from in-use heavy-duty diesel-powered trucks, at 77 FR 20308
April 4, 2012, revisions to the California on-road reformulated gasoline and diesel fuel regulations at 75 FR 26653 May 12, 2010, and revisions to the California motor vehicle inspection and maintenance program at 75 FR 38023 July 1, 2010.
55 2018 Western Nevada County Ozone Plan, page 51 and Appendix D, Reasonably Available Control Measures Assessment for Mobile Sources and Consumer Products.
56 CARBs consumer product measures are found in Title 17 California Code of Regulations section 94500 et seq. The compilation of such measures that have been approved into the California SIP, including Federal Register citations, is available at:
https www.epa.gov/sips-ca/epa-approvedregulations-california-sip. EPAs most recent approval of amendments to Californias consumer products regulations was in 2014. 79 FR 62346
October 17, 2014.
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NOX emission reductions due to the NOX-limited nature of the nonattainment area.58
The District evaluated a range of potentially available measures and was unable to find a combination of potential additional control measures for RACM. The EPA further calculated the additional reductions that would be necessary to advance attainment by a year. Subtracting the Districts 2020
attainment year emissions inventory from the 2019 emissions inventory yields a difference of 0.21 tpd NOX and 0.075 tpd VOC, equivalent to the reductions needed to advance attainment by a year.59 Based on our review of the Districts analysis, we agree that no additional control measures are available for stationary and area source categories in the nonattainment area that would provide the emissions reductions needed to advance attainment by a year.
With respect to mobile sources, CARBs current program addresses the full range of mobile sources in the Western Nevada County nonattainment area through regulatory programs for both new and in-use vehicles. With respect to TCMs, we find that the TCMs being implemented in Western Nevada County i.e., the TCMs described in the Transportation Plan are inclusive of all TCM RACM to be reasonably justified and supported.
We also find that CARBs consumer products program comprehensively addresses emissions from consumer products in the Western Nevada County nonattainment area. CARB measures are more stringent than the EPAs consumer products regulation promulgated in 1998,60 and generally exceed the controls in place throughout other areas of the country.
Based on our review of these RACM
analyses and the Districts and CARBs adopted rules, we propose to find that there are, at this time, no additional RACM including RACT that would advance attainment of the 2008 ozone NAAQS in Western Nevada County. For the foregoing reasons, we propose to find that the 2018 Western Nevada 58 2018 Western Nevada County Ozone Plan, page 41. As explained in Section III.D.2.a of this document, Western Nevada County is NOX
limited because ozone formation in the area is driven primarily by NOX emissions. As a result, reducing NOX emissions is more effective for reducing ozone than reducing VOC emissions.
59 The Plans RACM analysis incorrectly identifies the necessary year-to-year reductions as 0.06 tpd of VOC and 0.23 tpd of NOX, based on a comparison of 2020 and 2021 inventories. Given the small discrepancy in these numbers, relative to the emission reductions available in the area, we find that the Districts RACM analysis is adequately supported.
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