The Environmental Protection Agency (EPA) is finalizing approval of a state implementation plan (SIP) revision submitted by the State of California to meet Clean Air Act (CAA or ‘‘Act’’) requirements for the 1997 fine particulate matter (PM2.5) national ambient air quality  standards in the San Joaquin Valley ‘‘Serious’’ nonattainment area.  The EPA is also finalizing a one-year extension of the applicable attainment date from December 31, 2023, to December 31, 2024, for the 1997 annual PM2.5 San Joaquin Valley, California, nonattainment area based on their evaluation of air quality monitoring data and the extension request and supporting information submitted by the State of California.  Earlier this year, EPA proposed two actions including  ‘‘Amendments to the 15 mg/m3 SIP Revision and Agricultural Equipment Incentive Measure for the 1997 PM2.5 Standard’’  as a revision to the California SIP.  These amendments seek to amend a SIP approved measure, the ‘‘Accelerated Turnover of Agricultural Equipment Incentive Projects’’ (‘‘Valley Incentive Measure’’), to include a quantification of the emissions reductions for the year 2023 from existing agricultural equipment projects from the California Air Resources Board’s (CARB’s) Carl Moyer Memorial Air Quality Standards Attainment Program (‘‘Carl Moyer’’) and CARB’s Funding Agricultural Replacement Measures for Emission Reductions (FARMER) program and seek EPA approval of those emission reductions for SIP credit.   This action now formally recognizes the emissions reductions created by farmers replacing their tractors and harvesters voluntarily and formally acknowledges the Valley Incentive Measure has achieved emissions reductions of 5.0 tons per day (tpd) of nitrogen oxides (NOX) and 0.27 tpd of direct PM2.5 in the year 2023.   In the second action, based in part on our proposal to approve the 15 mg/m3 Plan Amendments, the EPA proposed to grant California’s request for a one-year extension of the applicable attainment date from December 31, 2023, to December 31, 2024, for the 1997 annual PM2.5 San Joaquin Valley, California, nonattainment area.  The proposed action to extend the applicable attainment date for this nonattainment area was based on the EPA’s evaluation of air quality monitoring data and xtension request submitted by the State of California, and our determination that the State has satisfied the two statutory criteria for a one-year extension under the Clean Air Act.  This is huge news for the San Joaquin Valley.