Posted By Martin Hartland Chris, You’ll need to find out who your regulator is. For Part A2 activities it will be the environment agency and for Part B activities it’ll be your local council. If you’re unsure call your local EHO They'll give you advice. Have a look at the link below on the Part A2 and Part B pages, read the guidance note that matches your process, the emission limits will in the notes. http://www.defra.gov.uk/...guidance/notes/index.htm Hope this is of use to you. Martin