Project Description

The Background

County Hall Campus in Northallerton, North Yorkshire, England, serves as the headquarters of North Yorkshire County Council (NYCC). The building was opened in 1906. County Hall is at the South Western edge of Northallerton and is now a Grade II* listed building.

The Challenge

Foul smells in and around Northallerton County Hall Campus had been reported for some time.

HCS were approached and asked to carry out a thorough investigation to determine what the root cause of the smells were. It was determined that the cause was a failed, 60-year-old sewage pump system.

The leaking effluence was giving off toxic gases Methane (CH4) and Hydrogen Sulphide (H2S) making it very unpleasant for anyone working in the vicinity and it was vital that the issue was tackled straight away.

The solution

HCS removed the existing pump system and replaced it with a modern, fit-for-purpose upgrade that would serve County Hall long into the future. Not only did this reduce maintenance costs but also reduced energy costs.

Lee said: “There was a lot to consider before making the switch. The job was considered ‘medium risk’ being in a confined space and having the danger of handling raw sewage to contend with.”

“Before starting, work permits were obtained to ensure  the safety for our team working at height and in a confined space carrying out ‘hot works’.

“As well as the safety of the HCS team, full protection for members of staff and the public had to be ensured.”

Welfare facilities were erected for the project, to eradicate any risk of cross contamination with the hall’s own rest rooms and canteen.

With all the correct safety measures in place, HCS set about removing the pump using a crane. Diesel pumps were installed as a temporary measure to keep the hall operational, while a new 400 volt Flygt pump weighing 60kg was lifted into place and installed. A brand new electrical control unit with bespoke control panel was installed. This equipment acts as a motor control for the pumping station at ground level and sounds an alarm if there are any causes for concern.

The result

Completed works; from design, implementation through to commission and completion took three weeks, leaving Northallerton County Hall with the reassurance that they now had a fully automated, fit-for-purpose pump system which will serve its staff and visitors every day.