Division BAT 34 In order to reduce emissions from delivery, storage and handling of treatment chemicals, BAT is to use technique (a) or (b) and all of the techniques (c) to (f) given below.
United Kingdom
| Technique | Description | |
|---|---|---|
| (a) | Back-venting | Also referred to as vapour balancing. Vapours of solvents or creosote which are displaced from the receiving tank during filling are collected and returned to the tank or truck from which the liquid is delivered. |
| (b) | Capture of displaced air | Vapours of solvents or creosote which are displaced from the receiving tank during filling are collected and led to a treatment unit, e.g. an activated carbon filter or a thermal oxidation unit. |
| (c) | Techniques to reduce evaporation losses due to heating up of stored chemicals | When exposure to sunlight may lead to evaporation of solvents and creosote stored in above-ground storage tanks, tanks are covered by a roof or coated with light-coloured paint to reduce the heating up of stored solvents and creosote. |
| (d) | Securing delivery connections | Delivery connections to storage tanks located within the bunded/contained area are secured and shut off when not in use. |
| (e) | Techniques to prevent overflows during pumping | This includes ensuring that:
|
| (f) | Closed storage containers | Use of closed storage containers for treatment chemicals. |