Our team assessed existing odour data from locations surrounding the waste management facility as well as onsite. Existing data analysed included hydrogen sulfide measurements on site, volatile organic compounds (VOC) measurements on site, pond water and sediment analysis, and waste types disposed of at the landfill. Other data analysed included community and staff statements, associated complaints or observations, and meteorological data from the site weather station. Additionally, the consultants conducted an odour survey program to analyse the current situation, and potential sources off-site were also assessed to provide further evidence in verifying the source of the odour experienced by the community.

The odour survey methods were based on the dynamic plume method of BS EN 16841-2:2016. The odour survey team completed an olfactometry screening according to AS/NZS 4323.3 criteria before successfully completing post-screening using the St. Croix Sensory odour sensitivity test. During each survey assessors tracked odour detection, type, intensity and hedonic tone. Monitoring of wind, H₂S, samples of volatile organics for analysis at a NATA accredited lab, while volatile sulfur compound samples were analysed by another laboratory.