Appendix 6. Odour Buffer Assessment [As Published] · 132007.2399

                                                                                         [19]
             Odour Buffer Assessment
             StarCo Developments




                                                                  Survey
                                                                  Areas




                                                                           STP




                                 Figure 7.1: Odour Survey Areas




8   FIELD ODOUR INTENSITY SURVEYS

Odour intensity has been adopted as the basis for recording semi-quantitative odour data in the
field. This can assist in evaluating model performance. The method developed for the project
permits quantification of ambient odour levels at concentrations at least 100 times lower than is
possible using dynamic olfactometry. This allows validation of odour dispersion models, a process
previously not possible.

Odour intensity is a subjective concept. However, to standardise the odour logging and analysis
approach as far as possible, two major steps have been taken:

       Adoption of a standard scale for describing odour intensity, as detailed in the German
       Standard VDI 3882 (I) which relates to odour measurement; and




1898a report final.doc                                                 PAE Job Number 1898a