76 FR 20237
SIP Approval: District of Columbia (1997 eight-hour ozone and 1997/2006 fine particulate matter (PM) NAAQS).
SIP Approval: District of Columbia (1997 eight-hour ozone and 1997/2006 fine particulate matter (PM) NAAQS).
SIP Approval: Mississippi (incorporation of nitrogen oxide (NOx) as a precursor to ozone).
SIP Approval: Massachusetts (delegation of authority for PSD program)
SIP Approval: Minnesota (sulfur dioxide (SO2) emissions).
SIP Approval: Indiana (updates to definitions)
SIP Approval: Minnesota (PM emissions).