Approval and Promulgation of Implementation Plans; South Dakota; Regional Haze 5-Year Progress Report State Implementation Plan

The Environmental Protection Agency (EPA) is proposing to approve South Dakota's regional haze progress report, submitted as a revision to its State Implementation Plan (SIP) by the South Dakota Department of Environment and Natural Resources (DENR). South Dakota's SIP revision addresses requirements of the Clean Air Act (CAA) and the EPA's rules that require states to submit periodic reports describing progress toward reasonable progress goals established for regional haze and a determination of the adequacy of the state's existing regional haze SIP. South Dakota's progress report explains that South Dakota has implemented the measures in the regional haze SIP due to be in place by the date of the progress report and that visibility in mandatory federal Class I areas affected by emissions from South Dakota sources is improving. The EPA is proposing approval of South Dakota's determination that the State's regional haze SIP is adequate to meet Reasonable Progress Goals (RPGs) for the first implementation period covering through 2018 and requires no substantive revision at this time.