HSE Praise For Chlorination Project

11 February 2015

A 12-month, £10 million project carried out by the Galliford Try Costain and Atkins (GCA) JV at United Utilities’ Huntington water treatment works near Chester has earned praise from the Health and Safety Executive (HSE).

The project involved the installation of a new On Site Electro-chlorination (OSE) plant at Huntington. The GCA team was responsible for the design, construction and commissioning of the plant, which removes the need for bulk storage of chlorine at the site. Believed to be one of the biggest such installations in Europe, it was handed over to United Utilities on programme at the end of 2014.

The HSE visited the site to examine the electrical, control and instrumentation aspects of the installation. The inspectors also carried out a detailed review of the design and implementation of safety systems and hazardous area zoning.

On completion of their visit the inspectors provided a summary and stated that they were extremely impressed with the quality of the OSE plant installation and the documentation provided, and cited it as one of the best that they had visited.

The plant is now fully operational and the GCA team is now working on decommissioning the site’s two bulk chlorine storage tanks.

“The project has gone very well and has significantly reduced the risk posed by the chlorine storage,” said Arwel Edwards, GCA Senior Site Manager. “As well as removing the bulk storage tanks, we are now completing other elements of the project. These include an emergency back-up sodium hypochlorite dosing plant, which is due to be handed over this Spring.”




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