25 Pa. Code § 139.17 - General requirements
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.
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