DSS Step 2:

Inventory of sources

In Step 2 an inventory of sources with effect on PS concentrations at river basin scale is derived from the areas of exceedance table (result of

Step 1

), from a database with an EU wide inventory of possible sources and from area specific information (e.g. from permits, emission registration data etc.). Step 2 results in a list (table or map) with actual areas of exceedance and their possible sources.

Step 2 follows the figure below where the table or map of actual areas of exceedance is the starting point.

Explanation of the sub-steps of Step 2 (figure below).

• Establishment of emission inventories, such as emission factors/rates for individual PSs and different source categories;
• Establish an inventory of goods and the PS concentration in these various goods;
• An understanding of the partitioning of materials through processes as well as statistical information on various uses of PSs in different economic sectors;
• The content of PSs in raw materials in the case of PSs being by-products of industrial and agriculture goods production;
• See also Other sources of information.

Result of the step
The result of Step 2 is a with sector/source specific emissions. An example table is given below.