| (a) In accordance with the applicable schedule in §117.9320
of this title (relating to Compliance Schedule for Cement Kilns),
the owner or operator of each portland cement kiln located in Bexar
County shall ensure that nitrogen oxides (NOX )
emissions from each preheater-precalciner or precalciner kiln do not
exceed 2.8 pounds per ton (lb/ton) of clinker produced on a rolling
30-day average basis.
(b) For the purposes of this section, the rolling 30-day
average is an average, calculated for each day that fuel was combusted
in the cement kiln, as the total of all the hourly emissions data
(in pounds) for the preceding 30 days that fuel was combusted in the
cement kiln, divided by the total number of tons of clinker produced
in that kiln during the same 30-day period.
(c) 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.
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