Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article III - Air Resources › Chapter 139 - SAMPLING AND TESTING › Subchapter A - SAMPLING AND TESTING METHODS AND PROCEDURES › STATIONARY SOURCES › Section 139.17 - General requirements

Current through Register Vol. 54, No. 28, July 13, 2024
The following are applicable to source tests for
							 determining alternative opacity limitations under §
													123.45 (relating to alternative
							 opacity limitations).
(1) A series of
						  three consecutive performance tests shall be conducted in accordance with the
						  requirements of §§
													139.1-139.4,
						  139.11 and
						  139.12. The time period from the
						  beginning of the first test to the end of the third test may not exceed 8
						  hours.
(2) The opacity of
						  emissions, as determined in accordance with the measurement technique specified
						  in §
													123.45 (relating to alternative
						  opacity limitations), shall be recorded for the entire time period from the
						  beginning of the first performance test to the end of the third performance
						  test.
(3) If continuous opacity
						  monitoring equipment is required, it shall be installed, operated and
						  maintained in accordance with Subchapter C (relating to requirements for source
						  monitoring for stationary sources).
(4) If continuous opacity monitoring
						  equipment is not required, visual observation of opacity shall be conducted by
						  the source owner or operator in accordance with the procedures in Appendix A,
						  Method 9 of §
													139.102(1)
						  (relating to references).
(5) Prior
						  to the first performance test, the results of opacity measurements obtained in
						  accordance with the technique specified in §
													123.45 will be compared to the
						  results of visual observations conducted by the Department in accordance with
						  Appendix A, Method 9 of § 139.102(1).
(i) A series of 60 consecutive observations
						  will be conducted by the Department observer at intervals of 15 seconds. The
						  results will be reduced to fifteen 1-minute averages.
(ii) The opacity measurements obtained by the
						  techniques specified in §
														123.45 for the same time period
						  will be reduced to fifteen 1-minute averages corresponding to those calculated
						  in subparagraph (i).
(iii) If any
						  of the 1-minute averages as calculated in subparagraph (ii) differ by more than
						  15% opacity from the corresponding 1-minute average as calculated in
						  subparagraph (i), the cause shall be determined and the comparison repeated
						  after appropriate adjustments have been made but before commencement of the
						  first performance test.
(iv) If the
						  average of the absolute values of the differences between the 1-minute averages
						  as calculated in subparagraph (ii) and the corresponding 1-minute averages as
						  calculated in subparagraph (i) is greater than 7.5% opacity, the cause shall be
						  determined and the comparison repeated after appropriate adjustments have been
						  made but before commencement of the first performance test.