# Commission Implementing Decision (EU) 2020/2009 of 22 June 2020 establishing the best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for surface treatment using organic solvents including preservation of wood and wood products with chemicals (notified under document C(2020) 4050) (Text with EEA relevance), Division BAT 47: In order to prevent or, where that is not practicable, to reduce emissions to water and to reduce water consumption, BAT is to use all of the techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
(a)
Techniques to prevent contamination of rain and surface run-off water
Rain and surface run-off water are kept separated from areas where treatment chemicals are stored or handled, from areas where freshly treated wood is stored and from contaminated water. This is achieved by using at least the following techniques:
drainage channels and/or an outer kerb bund around the plant;
roofing with roof guttering of areas where treatment chemicals are stored or handled (i.e. treatment chemicals’ storage area; treatment, post-treatment conditioning and interim storage areas; pipes and ductwork for treatment chemicals; creosote (re)conditioning facilities);
weather protection (e.g. roofing, tarpaulins) for the storage of treated wood in the event that it is required in the BPR authorisation for the wood preservative used for the treatment.
For existing plants, the applicability of drainage channels and an outer kerb bund may be restricted by the size of the plant area.
(b)
Collection of potentially contaminated surface run-off water
Surface run-off water from areas that are potentially contaminated with treatment chemicals is collected separately. Collected waste water is discharged only after appropriate measures are taken e.g. monitor (see BAT 43), treat (see BAT 47 (e)), re-use (see BAT 47 (c).
Generally applicable.
(c)
Use of potentially contaminated surface run-off water
After its collection, potentially contaminated surface run-off water is used for the preparation of water-based wood preservative solutions.
Only applicable to plants using water-based treatment chemicals. Applicability may be restricted by the quality requirements for its intended use.
(d)
Reuse of cleaning water
Water used to wash equipment and containers is recovered and reused in the preparation of water-based wood preservative solutions.
Only applicable to plants using water-based treatment chemicals.
(e)
Treatment of waste water
Where contamination in the collected surface run-off water and/or cleaning water is detected or can be expected, and where the use of the water is not feasible, the waste water is treated in an adequate waste water treatment plant (on or off site).
Generally applicable.
(f)
Disposal as hazardous waste
Where contamination in the collected surface run-off water and/or cleaning water is detected or can be expected, and where the treatment or use of the water is not feasible, the collected surface run-off water and/or cleaning water is disposed of as hazardous waste.
Generally applicable.

---
Source: https://www.legislation.gov.uk/eudn/2020/2009/annex/division/2/division/2.11/division/BATn1 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-2009/annex/division-2/division-2.11/division-BATn1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.