(a) In accordance with the compliance schedule in §117.9320
of this title (relating to Compliance Schedule for Cement Kilns),
the owner or operator of each portland cement kiln shall ensure that
nitrogen oxides (NOX ) emissions do not
exceed the following rates on a 30-day rolling average. For the purposes
of this section, the 30-day rolling average is calculated as the total
of all the hourly emissions data (in pounds) that fuel was combusted
in a cement kiln in the preceding 30 consecutive days, divided by
the total number of tons of clinker produced in that kiln during the
same 30-day period:
(1) for each long wet kiln:
(A) in Bexar, Comal, Hays, and McLennan Counties, 6.0
pounds per ton (lb/ton) of clinker produced; and
(B) in Ellis County, 4.0 lb/ton of clinker produced;
(2) for each long dry kiln, 5.1 lb/ton of clinker produced;
(3) for each preheater kiln, 3.8 lb/ton of clinker
produced; and
(4) for each preheater-precalciner or precalciner kiln,
2.8 lb/ton of clinker produced.
(b) If there are multiple cement kilns at the same
account, the owner or operator may choose to comply with the emission
specifications of subsection (a) of this section on the basis of a
weighted average for the cement kilns at the account that are subject
to the same specification. Each owner or operator choosing this option
shall submit written notification of this choice to the executive
director, the appropriate regional office, and any local air pollution
control program with jurisdiction before the appropriate compliance
date in §117.9320 of this title.
(c) Each long wet or long dry kiln for which the following
controls are installed and operated during kiln operation is not required
to meet the NOX emission specifications
of subsection (a) of this section, provided that each owner or operator
choosing this option submits written notification of this choice to
the executive director, the appropriate regional office, and any local
air pollution control program with jurisdiction before the appropriate
compliance date in §117.9320 of this title:
(1) a low-NOX burner and
either:
(A) mid-kiln firing; or
(B) some other form of secondary combustion achieving
equivalent levels of NOX reductions;
or alternatively;
(2) other additions or changes to the kiln system achieving
at least a 30% reduction in NOX emissions,
provided the additions or changes are approved by the executive director
with concurrence from the United States Environmental Protection Agency.
(d) Each preheater or precalciner kiln for which either
a low-NOX burner or a low-NOX precalciner is installed and operated during
kiln operation is not required to meet the NOX emission
specifications of subsection (a) of this section. Each owner or operator
choosing this option shall submit written notification of this choice
to the executive director, the appropriate regional office, and any
local air pollution control program with jurisdiction before the appropriate
compliance date in §117.9320 of this title.
(e) An owner or operator may use §117.9800 of
this title (relating to Use of Emission Credits for Compliance) to
meet the NOX emission control requirements
of this section, in whole or in part.
(f) This section no longer applies in Bexar County
after December 31, 2024.
|