Modernising Edmonton EcoPark

Works to replace a major London energy plant at Edmonton EcoPark are able to proceed after Technics completed a series of complex topographical and utility land surveys.

Technics was appointed by Wood plc to carry out the surveys to help with the relocation of existing sewer pipes across the 16-hectare site, which is preparing to receive a new Energy Recovery Facility under the North London Heat and Power Project.

The Technics team visited the site to understand the working environment and determine the most effective methodology to conduct the surveys, explained Andrew Palmer, Project Manager โ€“ Utilities at Technics.

Upon consulting the client, Technics recommended using IDS multi-channel GPR system, towed and hand pushed using the Hi-Mod, and RD 8000 radio frequency locators, which are widely recognised as effective geophysical equipment to detect utilities. Both EML and GPR are the minimal requirement for utility detection for PAS:128.

The team also determined two types of PAS:128 methodologies best suited for the project: M1 for greenfield and brownfield sites due to low density of buried utilities; and M2P for roads and pathways, due to a greater chance of utilities running in these areas.

Andrew said: โ€œIn our experience, the level of services within greenfield or brownfield areas are limited and therefore a lower level of detection method is required. These methods also reduce the cost for the client.โ€

Due to site rules which restricted access to roads, Technics recommended using Mobile GPR, which would allow the team to collect data using the vehicle towed Stream EM to prevent surveyors working on the carriageways, thus minimising disruption on site.

Part of the site included an HGV car park where large shipping containers are stored.

โ€œTechnics worked closely with all partners and stakeholders on site to develop a plan to move the containers and carry out the surveys, while the site remained fully in operation,โ€ said Andrew.

โ€œThis took four days in total, with the Technics team working round the clock, including at the weekend, to ensure the work was completed to schedule.โ€

On completion, Technicsโ€™ team provided the client with above and below ground 2D AutoCAD drawings and 3D wire frame models, along with PAS 128 reports explaining the methodologies and any situations encountered on site.

A spokesman for Wood plc commended Technicsโ€™ performance, commenting: โ€œTechnics was very professional at all times and produced a high standard of work on a survey, which presented many constraints and safety risks due to its location on one of the largest operational waste sites in London.

โ€œTechnicsโ€™ additional effort in going the extra mile to engage with and satisfy the health and safety requirements of the site operator were greatly appreciated and helped to ensure the project was a success.

โ€œTheir performance on this survey lead to being awarded a follow up intrusive survey package of works to obtain even higher levels of accuracy for the project.โ€

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