AQB Guidance
AQB02.28-01/March 3, 1999
AIR QUALITY BUREAU
NEW SOURCE REVIEW PERMIT PROGRAM GUIDANCE
REPLACEMENT OF IDENTICAL IC ENGINES AND TURBINES
1.0 PROCEDURE NUMBER: AQB 02.007-00
2.0 VERSION DATE: June 15, 1999
3.0 REGULATORY REFERENCE: 20 NMAC 2.72, Subpart II, Section 219.A
4.0 PURPOSE: To explain the requirements and restrictions for replacement of identical internal combustion (IC) engines or turbines.
5.0 PROCEDURE: While not specifically addressed in 20 NMAC 2.72, the Department does not consider replacement of identical IC engines or turbines to be a permitting action since no part of the applicable permit changes. If some aspect of the permit relating to identification of the emissions unit (such as the serial number) is different for the new unit, then an administrative permit revision is the appropriate mechanism to make the permit change.
6.0 REQUIREMENTS FOR REPLACEMENT OF IDENTICAL IC ENGINES OR TURBINES:
A. This procedure applies to IC engines and turbines at a facility of any size and subject to any permitting program.
B. The replacement IC engine or turbine must be identical to the original unit, including the following: manufacturer, model number, emissions, operating specifications, and air pollution control equipment. Normally, the Department will use an administrative permit revision to change serial number, or the name/model of the unit if the manufacturer verifies that the equipment is exactly the same in other respects.
C. The applicability of NSPS or MACT to the new emission unit does not prevent the replacement, even if the permit does not cite the requirement for the existing unit. The federal requirement will apply regardless of the permit language. Either future NSR or Title V permits will incorporate the appropriate language.
AQB Guidance
AQB02.28-01/March 3, 1999
D. The replaced equipment was operated continually over the two (2) years preceding the change, except for periods of routine maintenance or repair. This requirement ensures that there is no difference between previous actual emissions and post-change potential emissions, precluding any question about PSD applicability.
AQB Guidance
AQB02.28-01/March 3, 1999
E. Any initial compliance test requirements and associated time lines that applied to the replaced unit will apply to the new unit. Consequently, an initial compliance test may be necessary on the new unit.
7.0REPLACEMENT OF UNITS TRIGGERING PSD NETTING:For sources that are major under PSD (as defined by 20 NMAC 2.74 PSD), the emission of each pollutant from the unit being replaced must be less than the “significant” thresholds that trigger PSD netting.
8.0 REPLACEMENT OF IDENTICAL UNITS NOT PREVIOUSLY PERMITTED: A non-permitted IC engine or turbine in existence before August 31, 1972 is not eligible for limited replacement. In this case new units are subject to all applicable permitting requirements of 20 NMAC 2.72.
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Bureau ChiefEffective Date
AQB228-01.doc