6.1 Emission testing should follow the requirements
of the NOx Technical Code 2008, chapter 5, and associated
Appendices, except as provided for in these Guidelines.
6.2 CO2 should be measured on a dry
basis using an analyser operating on non-dispersive infra-red (NDIR)
principle. SO2 should be measured on a dry or wet basis
using analysers operating on non-dispersive infra-red (NDIR) or non-dispersive
ultra-violet (NDUV) principles and with additional equipment such
as dryers as necessary. Other systems or analyser principles may be
accepted, subject to the approval of the Administration, provided
they yield equivalent or better results to those of the equipment
referenced above.
6.3 Analyser performance should be in accordance
with the requirements of Appendix III sections 1.6 to 1.10 of the
NOx Technical Code 2008.
6.4 An exhaust gas sample for SO2 should
be obtained from a representative sampling point downstream of the
EGC unit.
6.5 SO2 and CO2 should be
monitored using either in situ or extractive sample systems.
6.6 Extractive exhaust gas samples for SO2 determination
should be maintained at a sufficient temperature to avoid condensed
water in the sampling system and hence loss of SO2.
6.7 If an extractive exhaust gas sample for determination
needs to be dried prior to analysis it should be done in a manner
that does not result in loss of SO2 in the sample as analysed.
6.8 Where SO2 is measured by an in
situ system, the water content in the exhaust gas stream at
that point is also to be determined in order to correct the reading
to a dry basis value.
6.9 In justified cases where the CO2 concentration
is reduced by the EGC unit, the CO2 concentration can be
measured at the EGC unit inlet, provided that the correctness of such
a methodology can be clearly demonstrated.