When the first edition of this ‘Yellow Book’ was issued, it contained calculation methods to be performed on pocket calculators. Although the second edition in 1988 presumed that personal computers would be available to perform the required calculations, only part of the report was updated. Today more powerful computers are generally available, thus enabling the use of more complex and more accurate computing models.

This third edition is a complete revision by TNO Institute of Environmental Sciences, Energy Research and Process Innovation. It is based on the use of these powerful PC’s and includes the application of proven computing models. Special attention is paid to provide adequate directions for performing calculations and for the coupling of models and calculation results.