A field odour impact survey – sometimes called a ‘sniff survey’ – is an independent subjective survey which measures the impact of odours, and identifies the specific odour source, or sources, where it’s not known.
Silsoe Odours uses the results of the field odour impact survey to provide our customers with scientific evidence relating to your odour emissions. Our report will enable you to measure, evaluate and ultimately control the odours which may be produced by your plants and processes.
The Field Odour Impact Survey utilises a panel of qualified odour assessors, in line with BS EN16842-2 guidelines to determine the effects of odour dispersal over a determined period in a range of meteorological conditions.
WHY MIGHT I NEED A FIELD ODOUR IMPACT SURVEY?
We provide the results of the field odour impact survey to our customers in an easy-to-read report, which contains details that are helpful for informing odour management plans and implementing odour control measures. Many of our customers find this extremely useful for satisfying the requirements of the regulator, particularly following public complaints relating to malodours.
A field odour impact survey is useful for:
An odour impact assessment without requiring access to site
Identifying odour sources where multiple sites are in close proximity
Confirming the results of dispersion modelling
Informing odour management plans
Confirming the details of odour complaints
HOW DO FIELD ODOUR IMPACT SURVEYS ASSESS ODOUR IMPACT?
Field Odour Impact Surveys use a series of observation points located downwind of the suspected source of the odour, detailed records are kept in order to track its intensity and frequency. The term ‘plume’ describes the trajectory of the odour and the dispersal pattern created as it meets atmospheric turbulence. Data is recorded at regular intervals, noting meteorological divergences. The human assessors use the ‘sniff test’ to determine the absence or presence of the odour and its journey is plotted by noting where the smell is at its most intense, and at what point it disappears.
The composition of the panel for any given Field Odour Survey will remain constant throughout the testing process and the number of assessors will be determined by the manner of assessment:
Plume Method – a minimum of five assessors.
Dynamic Plume Method – a minimum of two assessors.
The simplified diagram in Fig. 1 illustrates the idealised progression of the assessors. The wind indicated by the arrow 1, the odour source is at 2. Black spots indicate where an odour is detected and circles where no odour is detected. The plume extent is drawn between odour present and no odour points. Panel members will make an assessment every 10 seconds.
HOW DOES A FIELD ODOUR IMPACT SURVEY WORK?
Our field odour impact surveys are conducted by our panel of qualified odour assessors, and led by one of our highly experienced odour experts. All our odour assessors are selected and continually checked according to the requirements of BSEN13725:2003.
The odour panel will use a series of observation points, located downwind of the suspected odour source, to track its intensity and frequency. These observations are conducted in line with Institute of Air Qualty Management (IAQM) Guidance and/or European Standard BSEN16842-2.
Our field odour impact surveys are designed to respond to subjective experiences of odour impact, representative of the kind of complaints our customers may face from members of the public.
If your business would benefit from a Field Odour Impact Survey, call our team today 01525 351 396.
Field Odour Impact Surveys assessors
THE FIRST UK ODOUR LABORATORY WITH UKAS ACCREDITATION
By 2020, Silsoe Odours aims to be the most recognised and respected odour consultancy in the UK, being a leading influencer in the industry and changing the way that odour pollution is dealt with.
Silsoe Odours minimises the impact that odours have on people's lives through measurement and detection, and by educating and equipping its clients to prevent further pollution.