The client was having issues with one of their holding reservoirs at the wastewater treatment plant in Morrinsville.

They recognised that there was a leak but were unsure of how and where the leak was coming from. The leak was causing deformation and problems to the concrete slab at the base of the reservoir.

Challenge

Because the team were working around wastewater, full safety measures and sanitary precautions had to be taken, including full PPE (full suits and facemasks. The reservoir had to be emptied and washed down before the team could complete their scan and al equipment had to be washed thoroughly after its use in the reservoir to avoid any contamination.

Solution 

Using  Stream DP, the latest ground penetrating radar technology for 3D mapping, the team scanned the concrete slab. After processing the data, the USL team were able to find two stormwater lines running through the pad and the void that had formed around them, caused by the leaking pipes. 

Outcomes

The USL team provided the client with their findings. This allowed them to identify the problem and get the issue fixed – preventing further corrosion to the concrete base.