What we doHydrogen sulphide is a colourless and insidious gas that can form under certain conditions in stagnant sewage pipes and sewerage networks.

Hydrogen Sulphide can present a hazard to workers, a nuisance to residents and, over time, can lead to corrosion of pipework.

At IETG, we can provide the technical expertise and experience needed to identify areas of concentration. We use leading technology to provide you with in depth analysis.

Melanie Sleeper
Contracts Manager
t: 07791 097060 | e: msleeper@ietg.co.uk
Contact IETG

How we do itIf you fail to plan, you're planning to fail

Even the best technology will fail to get data from a poor site.

Our experienced Planning and Scheduling department minimise wasted visits and the associated costs by helping clients to “design out” sites that are hydraulically unsuitable, impractical, or unsafe prior to starting on site. We ensure there is effective and timely traffic permitting and use optimal route planning for efficiency.

During the pre-survey inspection, our Field Crews will help clients select the best sites available using their practical experience of sewers and knowledge of the equipment.

Even the best equipment needs to be installed correctly to record accurately.

The experience of our Field Crews is second-to-none, and leads to quality installations even in difficult circumstances. This is supported by Field Managers monitoring all installations as part of our quality control procedures in order to ensure the data recorded and presented is of the highest possible quality.

Once installed, equipment sends back data on a daily basis. Our Data Analysts visually inspect the data from every monitor, every day. This means that any problems can be identified quickly, and Field Crews scheduled for maintenance visits as necessary.

Data analysts inspect each monitor’s data on a daily basis, to identify problems and ensure that maintenance visits can be arranged in a timely manner to prevent data loss. This inspection of data can provide additional benefits: on several occasions our Data Analysts have identified problems on the sewerage network from data patterns and have been able to alert the Operators in time to prevent pollution incidents.

Historically, we have been asked questions about monitor performance and balancing issues months (and sometimes years!) after our report has been completed. These queries can be difficult to resolve at a distance, are time-consuming, and can delay the modeling process significantly. For this reason, we conduct data reviews with the modeling team in the first few weeks of the survey in order to ensure they understand what is happening at each site, to optimise the quality of data and to investigate any flow balancing anomalies.

At IETG, we have the largest fleet of dual-sensor, telemetry flow monitors in the UK, ensuring we can provide clear and accurate data continuously in the vast majority of cases.

Telemetry allows us to check data quality and often, while minimising the number of Confined Space entries our teams have to undertake.

Dual-sensor technology gives us a series of checks on data between the sensors and a “back-up” from the secondary sensors if necessary, minimising data loss and making maintenance visits as efficient as possible.

Our aim, always, is to use the best available technology at each site. So, on the rare occasion that our existing fleet isn’t suitable at a particular site, where possible we’ll find something that is.


Why choose IETG?What sets IETG apart?

We pride ourselves on being able to deliver a high quality service and meet clients’ delivery requirements without compromise by focusing on:-

  • Safety – Our culture is one of “We Will Work Safely or Not At All”: essential when our work is often on the highway, in confined spaces or next to watercourses.
  • Quality – Every project we deliver is subject to our rigorous Quality Control processes, which are managed by our experienced team.
  • Service – Our clients are allocated a dedicated Project Manager with proven industry experience. We pride ourselves on delivering one stop shop solutions and finding creative answers to the range of challenges projects undoubtedly throw up.
  • Value – By utilising the very latest technology, thorough planning and experienced teams, IETG provide the best solutions for all our clients needs.

Explore Our Solutions

Industry-leading surveying services, delivering the right data at the right time.