As soon as
Using the technical guidance for performing the MCR, State identifies air quality
expected to be achieved at “mid-course” period (at the end of the year the MCR
is performed (e.g., 2004)
Recommended effort: States should identify analyses and data bases which will be
used to support a mid-course review and discuss these with the appropriate U.S.
EPA Regional Office.
10/1/04 EPA to provide any available assessments of national and regional control
12/31/04 State submits its MCR to EPA that determines whether sufficient progress toward
attainment is being made. Even though the MCR is not a SIP revision, EPA
recommends that the State provide an opportunity for public comment on the
MCR before submission to EPA.
If the State determines that sufficient progress is being made, the State would
continue implementing the SIP. If the State determines that progress is not being
made, the State would proceed as follows depending on the degree of progress:
a. In all cases, the State should identify the already adopted control measures for
which emission reductions phase-in after the year in which the MCR is performed
(e.g., post-2004), and potential new control measures that could form the bases
for the emission reduction inventory input for future air quality modeling if needed.
b. EPA recommends that the State implement some or all of the short-term
corrections identified in its MCR to expedite getting the area back on course
c. If the problem is more severe and not readily addressed by short-term
corrections, EPA recommends that the State voluntarily and expeditiously begin
the process to revise its SIP, including new modeling as appropriate.
EPA will also review the MCR. If EPA determines that sufficient improvement in
ozone air quality is not occurring within the State, and that the State is not
implementing sufficient corrective measures to address its contribution to that lack
of progress, EPA would either find that the State has failed to implement a part of
its SIP and/or issue a call for SIP revision for the State. Also, if EPA determines
that sufficient progress is not being made by any upwind State that had previously
been found to contribute significantly to the State’s ozone problem, EPA would
concurrently either find that an upwind State has failed to implement a part of its
SIP and/or issue a call for a SIP revision from such an upwind State. (Likely
timeframes for proposed and final rule on call for SIP revision: 4/30/05 and
8/31/05.) See section B below regarding transport.
The EPA would specify the time period for a State to act; that time would be no
longer than 18 months from the determination of lack of progress or call for SIP
revision (e.g., 2/28/07). Actions the State may need to take are--
–any corrective action identified in the MCR
–submitting a new attainment demonstration with new modeling based on a new
base year emission inventory and appropriate meteorological episodes.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
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