This
notice is to inform you that the South Coast Air Quality Management District
(AQMD) is proposing to require, as best available control technology (BACT),
that emissions from combined-cycle/cogeneration combustion gas turbines be
limited to 2.0 ppmv of oxides of nitrogen (NOX) and 3.0 ppmv of carbon monoxide
(CO), 1-hour average, corrected to 15% exhaust oxygen level, dry basis,
excluding startups and shutdowns.
AQMD is the air pollution
control agency for Orange County, Riverside County (excluding the easternmost portion located in the Mojave Desert APCD)
and the non-desert portions of Los Angeles and San Bernardino Counties. Anyone wishing to install or modify equipment that could control or be
a source of air pollution within this region must first obtain a permit from
AQMD.
Pursuant to AQMD Regulation
XIII - "New Source Review", the Executive Officer shall deny the
Permit to Construct for any new or modified sources which result in an emission
increase of any non-attainment air contaminant, any ozone depleting compound or
ammonia, unless BACT is employed. BACT is the most stringent emission limit or control technology that is found in a
state implementation plan or achieved in practice
Previously, BACT for a
combined-cycle or a cogeneration combustion gas turbine has been 2.5 ppmv of NOX
and 6 ppmv of CO, 1-hour average, corrected to 15% exhaust oxygen level, dry
basis.
The proposed BACT has
become achieved-in-practice at the ANP Blackstone power plant located in Massachusetts. It
is comprised of two combined-cycle combustion gas turbines which are equipped
with oxidation catalysts and selective catalytic reduction control technology
and limited by their permits to 2.0 ppmv NOx and 3.0 ppmv CO, 1-hour average,
corrected to 15% exhaust oxygen level, dry basis, except for startups and
shutdowns. The plant has been operating since June 2001 and has demonstrated its compliance with the permitted
emission levels.
Under the BACT Guidelines
approved by the AQMD Governing Board in October 2000, the AQMD must distribute a
public notice with a 30-day public comment period when a new, more stringent
BACT is required in a permit. This document serves as a notice of the AQMD’s
intent to establish the more stringent BACT for all combined-cycle and
cogeneration combustion gas turbines.
Anyone wishing to comment
on the proposed BACT determination for combined-cycle and cogeneration
combustion gas turbines should submit the comments in writing within 30 days of
the distribution date shown below. Submit written comments to Martin Kay, Technology Advancement Office, South Coast Air
Quality Management District,
21865 Copley Drive, Diamond Bar, California 91765-4182 or by email to
mkay@aqmd.gov.
Distribution date: _______January
16, 2003_______
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