The Environmental Odour Laboratory has some of the best available technology for odour measurement and uses the Dutch Standard NVN 2820 for its olfactory measurements. While undertaking the study, the Environmental Odour Laboratory was accredited by the National Association of Testing Authorities, Australia for the Dutch Standard NVN 2820 method of olfactometry (results reported as per draft Aust Standard, as “Certain and Correct” criteria). The Dutch Standard is the basis for the development of the proposed European Standard and the proposed Australian Standard for odour measurement. Consequently the data presented in this report should be useable for some time to come, rather than becoming dated by the use of an Australian state based method or other method with limited international acceptance.