Enfield Flood Risk Activity Permit

Enfield 16 January 2023

Redevelopment of former car park to provide dedicated parking and overnight storage facilities for the operator’s delivery vehicles

As part of these works a range of demolition and construction activities were required within 8 metres of the adjacent main rivers. A Flood Risk Activity Permit (FRAP) was therefore required for these activities.

The site was bound to the east, south and west by the River Lea and River Lee Navigation which are main rivers. As a number of the construction and demolition activities were to take place within 8 metres of a main river a FRAP was required to cover the activities. Enzygo’s Permitting Team initially looked at the possibility of applying for an exemption but the activities which our client needed to undertake did not fit into any of the available exemptions. We also looked at the suite of Standard Rules Permits available for the proposed activities, but due to the type of works and the location of the proposed activities this option was not available to our client. A Bespoke Flood Risk Activity Permit was therefore required for the works. The activities covered by the FRAP included demolition of existing structures, excavations, storage of materials, erection of fencing, construction of new structures and the construction of a new outfall. As part of the FRAP application a management system was developed which set out the methods by which the construction and demolition activities would be managed and carried out to minimise any risks to the environment. This document was developed in liaison with the client and contractors for the works and included a site-specifi c risk assessment. The installation of the new outfall required further permissions from the Canal and River Trust (C&RT) as the outfall would discharge into one of their assets. A separate application was therefore completed and submitted to C&RT for the discharge of surface waters to the River Lee Navigation. Enzygo’s permitting team were successful in obtaining a FRAP to enable the client to carry out their works as planned. A consent to discharge the new surface water outfall into the C&RT asset was also successfully acquired, ensuring that the future discharges from the sites ongoing operation would be compliant. Enfield former car parkEnfield Flood Risk Activity Permit

Project Details:

Date: February 2022 Client: Eireng Consulting Engineers Ltd Value: £4,150 Office: Cromhall, Bristol Discipline: Permitting

Case Study

Anaerobic Digestion Facility​


The Operator processes food waste by treating and digesting a wide range of waste feedstocks. Wastes are treated to remove packaging and other non-digestible contaminants, to create a liquor which his subjected to anaerobic digestion. This digestion process produces methane which is used to generate electricity by combustion in the on-site gas engines for export to the National Grid.


Environmental Permit Application Variations

Enzygo’s Permitting team successfully applied for use of an additional engine to enable the client to increase the amount of energy exported to the National Grid, thereby improving profitability of the facility. This involved upgrading their existing Standard Rules Permit to a Bespoke Permit and required production of supporting technical documentation and management of the Application process. A further Variation Application was submitted to enable the use of an ‘Organic Rankine Cycle’ heat recovery unit, which uses heat lost in the engine flues to generate a secondary source of electricity, further increasing export to the National Grid without any increase in waste throughput or biomethane generation.

Your Dream. Our Mission.

What we did?

Enzygo are tasked with providing on-going regulatory support to the client to assist them in complying with their Environmental Permit. This support has included preparation of permit variation applications, preparation of an Environmental Management System and providing training to employees on the Environmental Management System.


Environmental Management System

Enzygo’s Permitting Team produced a bespoke EMS to enhance environmental performance and demonstrate compliance with permit conditions. The EMS was produced to site-specific standards of operation and within the scope of ISO14001: Environmental Management Systems. Enzygo also developed training for operatives and site management to ensure that the new standards of the EMS were adhered to. This provided additional reassurance to our client’s Directors that a high standard of environmental protection will be achieved during day to day operations.


Regulatory Support

Enzygo’s Permitting Team has provided on-going regulatory support across a wide range of topics including Pollution Inventory Reporting and training, BAT assessments, liaison with Environment Agency, advice compliance with Environmental Regulations, guidance and policy.


What We Achieved

Enzygo’s Permitting Team explained to the Regulator how the ORC technology worked, as they were not familiar with this, and demonstrated that the technology would not lead to any increased emissions from the site. Enzygo’s training has ensured that employees are aware of the responsibilities placed on them by the Site’s Environmental Management System.

Further Work
Enzygo continue to undertake permitting and planning work within the anaerobic digestion sector for new and existing clients, using its experience in this sector in undertaking new applications and providing appropriate advice.
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