THE SOLUTION
We were contacted and asked to develop a solution that would correct the falls within the tank. A particular challenge when working with thermoplastics is gaining adhesion as these materials have a low surface energy which make them challenging to bond to.
Following pumping out of the tank as far as possible we employed a specialist confined space cleaning company to conduct a tank entry clean under full breathing apparatus with a rescue team present. Given the known issue of septicity it was highly probable that high levels of toxic hydrogen sulphide would be encountered during cleaning operations.