Written questions by Madders.

Food and Rural Affairs, what evidence and compliance assessments the Environment Agency relied upon when permitting the continued operation of the Stanlow refinery, including in relation to BAT 52 obligations.

The Environment Agency (EA) assessed the Stanlow refinery BAT 52 derogation against known pollutants such as non-methane volatile organic compounds (NMVOC) benzene. The EA confirmed there would be no increase in emission concentrations from the White Oil Docks vent or other site activities as a result of the derogation. [assets.pub...ice.gov.uk] The operator’s impact assessment followed the EA’s established methodology in ‘Air emissions risk assessment for your environmental permit’, which evaluates potential effects on sensitive human health receptors. The operator submitted dispersion modelling in accordance with this guidance, and the modelling and assessment report is available on the EA Public Register. [consult.en...ncy.gov.uk] The EA concluded that long‑ and short‑term impacts from these known pollutants under BAT 52 are not significant.

Food and Rural Affairs, what assessment the Environment Agency has made of the adequacy of permits supplied to manufacturers in Stanlow.

There are two permits issued to manufacturers on the Stanlow Manufacturing Complex by the Environment Agency (EA): Argent Biodiesel LP3233DK and Essar Oil UK (Stanlow Manufacturing Complex) (FP3139FN). Both have permits under Environmental Permitting Regulations, determined and issued following due process. For Argent, the most recent variation and consolidated permit was issued on 18 November 2024. For Essar, the most recent variation and consolidated permit was issued on 24 June 2025. In addition, there is a local authority regulated part B permit for Stanlow Terminals Limited for storage, unloading and loading petrol at road terminal. A programme of inspection and audit by the EA’s local team checks compliance with permit conditions, including monitoring emissions to air, water and land, operating procedures reviewing reports, and verifying self-monitoring. If significant non-compliance is detected, then this is, and has been, addressed by follow-up inspection and appropriate enforcement response.

Food and Rural Affairs, what steps she is taking to help reduce the odours emanating from Stanlow.

The Environment Agency (EA) has initiated an investigation into the source and cause of odours in the area, visiting Stanlow refinery and other regulated businesses. EA officers have undertaken odour checking in the community, through scheduled visits and in response to complaints. The refinery environmental permit sets out emission limits as well as requiring the operator to take action to minimise odours by using appropriate measures. The EA identified one potential source of odour, and the operator is installing equipment to reduce odorous emissions from this source. The EA further directed the company to review their plant operations, to identify any other potential causes of the odour and to update their management systems including a comprehensive revision of their Odour Management Plan. The EA is assessing available air quality, emissions, and meteorological data and has engaged with the UKHSA and Local Authority Cheshire West and Chester on this.