17.6.2 Collect available data and models for each sector needing projections
The EIIP projections document (referenced previously) provides a starting point for this
step. The EIIP document provides the majority of information about sources of data on growth
and controls. This section supplements that document.
For each sector needing projections (and in particular for the priority sectors), emissions
modelers should collect and review growth and control information. As noted in the EIIP
document, the sources of such information depend upon the sector of interest. New data and
approaches beyond those in the EIIP document are available and provided here; likewise, new
data and approaches will become available subsequent to the publication of this document. The
information provided here is a snapshot of information that will grow and adapt over time, and
emissions modelers should seek out such new information as part of this step.
For sectors and regions with lower priority for consideration (as described in Section
17.6.1), emissions modelers can rely on available default data. For sectors and regions that are
important to modeling the nonattainment area, emissions modelers should spend additional effort
obtaining improved information from other modeling applications (such as modeling done by
RPOs or other States) or developing the improved information themselves.
In addition to the sources of control information about non-EGU point and stationary area
sources listed in the EIIP projection document, EPA has provides control assumptions with its
modeling data used for promulgating air quality rules. For example, emissions growth and
control assumptions were provided with the Clean Air Interstate Rule (See
http://www.epa.gov/air/interstateairquality/pdfs/finaltech01.pdf for additional information on
obtaining actual data files) More current information is usually available than what is available
from EPA, which is best obtained by working with state and local regulatory officials for the SIP
modeling region. The remainder of this section focuses on sources of growth information.
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