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NOx State Implementation Plan (SIP) Call
for the Mid-Atlantic States
- The NOx SIP Call (see Proposed
Rule for Reducing Regional Transport of Ground-Level Ozone) required
22 states and the District of Columbia to submit State Implementation Plans
providing Nitrogen Oxide (NOx) emission reductions to mitigate ozone transport
in the eastern United States.
- EPA proposed that control of large electric generating units (EGUs) and
large industrial boilers (non-electric generating units, or non-EGUs) would
provide highly cost effective means for a state to meet its NOx SIP Call obligations.
EPA provided a voluntary Model Rule which states could adopt and which would
allow states to participate in the EPA-administered trading program.
- All states in the Mid-Atlantic Region chose to adopt the Model rule. EPA
approved NOx SIP rules for the District of Columbia, Delaware, Maryland, Pennsylvania,
and West Virginia. EPA conditionally approved Virginia's rule.
- Due to extensive litigation on this action, the requirements of the NOx
SIP Call were separated into two phases. Phase I will achieve the majority
of the reductions, about 90%, and affects EGUs and non-EGUs. Phase II, which
has not been finalized, addresses internal combustion engines, non-Acid Rain
EGUs (cogens), and cement kilns.
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