South West Water (SWW) provides drinking water and waste water services throughout Cornwall and Devon and in small areas of Dorset and Somerset. Atlantas Marine supplied SWW with a VideoRay Pro 4 ROV system in 2013, which has since been adopted as being the best tool for all of their underwater inspection work. Asset Manager Myles Key gave the following testimonial:
“We purchased a Pro 4 ROV in the autumn of 2013, the purchase was made through our Health & Safety capital allocation and was justified on the basis that each use of the ROV would avoid confined space exposure for our Maintenance Team and in addition would avoid a shutdown (removal from service) of a Service Reservoir, Treated Water Tank Chlorine Contact Tank etc.
The primary use of the ROV has been for both routine and urgent inspections of potable water tanks; historically tanks would routinely be removed from service for inspection and cleaning, furthermore if water quality compliance failures were recorded, tanks would be removed from service for inspection to help us to understand how the compliance failure occurred. Every water company is likely to have potable water tanks that are difficult to remove from service, for example single cell service reservoirs. The ROV has given us the opportunity to inspect these tanks to gain a better understanding of their condition and specifically whether there is a significant accumulation of sediment that would warrant removing the tank from service for cleaning. The ROV inspection might therefore justify the need to bypass the tank or demonstrate that the cleaning operation can be delayed.
The ROV enables us to observe flood testing of the roofs of potable tanks without the need to remove the tank from service; water companies often struggle to understand why a water quality non-compliance has occurred. It is often the case that the integrity of the roof slab/membrane/wall to roof joint is suspected to be the likely cause. The benefit of observing the flood test on a live tank using the ROV is that the tank is being monitored whilst there is a volume of water creating an internal pressure on the walls of the tank, this can therefore reveal problems that might otherwise become disguised/invisible once the tank is emptied. The addition of the upward facing camera which we purchased several months after our initial purchase of the PRO 4 has proved invaluable for roof flooding inspections.
The PRO4 is now being used extensively by our trained operators, indeed its use is being limited only by the hours available for our team to be able to accommodate the requests from our Operations teams to inspect their assets. It has therefore become an essential tool in our armoury and we wouldn’t be without it”
For more information please contact Atlantas Marine on 01935 426 000 or firstname.lastname@example.org