Appendix D. ALTERNATIVE OPACITY LIMITATION—APPLICATION

Applicable Regulation	Opacity/Mass Limitation	Procedure
A. Sources subject to EPA NSPS	Opacity limit specified in NSPS	EPA procedure for AOL applies
	Opacity limit not specified in NSPS	DER procedure will be used to establish AOL at the NSPS level for mass emissions
B. Sources subject to nonattainment area provisions (LAER applies)	Emission limitation will be specified in permit	DER procedure will be used to establish AOL at the maximum mass emissions rate specified as LAER
C. Sources subject to permit requirements (e.g., BACT)	Mass emission rate specific in PAA or permit	DER procedure will be used to establish AOL at BACT mass emission rate
	No mass emission rate specified in PAA or permit (e.g., equipment specification), 2 cases
	1. No opacity limit specified in PAA or permit	Not eligible for AOL
	2. No opacity limit specified in PAA or permit (mass emission rate and opacity limits under DER regulation are assumed to apply)	DER procedure will be used to establish AOL at the regulatory emission rate
D. Sources subject only to DER regulations (RACT)—no permit conditions apply	Mass emission limitation specified in DER regulation	DER procedure will be used to establish AOL at the regulatory emission rate
	No mass emission limitation specified in DER regulation	Not eligible for AOL

NOTE: Sources incapable of a stack test are ineligible for an AOL
Abbreviations: AOL—alternative opacity limitation
NSPS—New source performance standards
PAA—plan approval application
BACT—best available control technology
LAER—lowest achievable emission rate
RACT—reasonably available control technology
PSD—prevention of significant deterioration

Cross References

This appendix cited in 25 Pa. Code § 123.45 (relating to alternative opacity limitations).

Source

The provisions of this Appendix D adopted June 19, 1981, effective June 20, 1981, 11 Pa.B. 1447; corrected June 26, 1981, effective June 20, 1981, 11 Pa.B. 2225.