Paragraph 13 Odour Containment and Abatement

All odour abatement equipment that treats contained emissions (odorous air collected by extract ventilation from enclosed or covered tanks or channels, plant, equipment or a process building) shall have an odour removal efficiency of not less than 95%.

Where the inlet odour concentrations are very low and 95% odour removal efficiency is difficult to demonstrate due to measurement reproducibility and equipment efficiency at low concentrations, the final discharge to air should contain less than 500 odour units/m3.

Determination of the odour removal efficiency shall be by dynamic dilution olfactometry in accordance with EN13725^f1 and shall be based upon manual extractive sampling undertaken simultaneously at the inlet and outlet of the odour abatement equipment and at least three samples shall be taken from both the inlet and outlet.

Where odour abatement equipment that has been installed before 22nd April 2006 fails to meet the requirements of sub paragraphs (1) to (3) but emissions from that equipment are causing an odour nuisance, the equipment shall be upgraded to the odour removal efficiency specified in sub paragraph (1).

Where odour abatement equipment that has been installed before 22nd April 2006 fails to meet the requirements of sub paragraphs (1) to (3) but emissions from that equipment are not causing an odour nuisance, the use of that equipment shall continue to be accepted until the end of its reasonable operational life.

Where sub paragraph (5) applies–