Report - DCE - Nationalt Center for Miljø og Energi

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The uncertainty model estimates uncertainty for both the emission and the
trend. The emission uncertainty for SO2, NOx, NMVOC and CO is 25 %, 15
%, 40 % and 125 %, respectively.
For PM the uncertainty is 50 % and for most heavy metals and PAHs the uncertainty
is around 200 %. A list of the individual uncertainty estimates for
the fugitive emission inventory is shown in Table 3.59.
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A list of QA/QC tasks are performed directly in relation to the fugitive
emission part of the Danish emission inventories. The following procedures
are carried out to ensure the data quality:
• Checking of time series in the NFR and SNAP source categories. Considerable
changes are controlled and explained.
• Comparison with the inventory of the previous year. Any major changes
are verified.
• Total emission, when aggregated to reporting tables, is compared with
totals based on SNAP source categories (control of data transfer).
• A manual log table in the emission databases is applied to collect information
about recalculations.
• The emission from the large point sources (refineries, gas treatment and
gas storage plants) is compared with the emission reported the previous
year.
• Some automated checks have been prepared for the emission databases: