As London smoothly continued its business, Hydro Cleansing moved into the dirty underworld of a pump station in West London. After a free site survey HCL established that four screens within it were on the verge of becoming blocked.
Four vast 4m high screens were located within a 20m deep shaft. This would be an overwhelming job for most companies. Megatron’s force was the only answer!
To accompany the beast, HCL sent an articulated bulk tanker to hold the waste and a five man confined space team. The team comprised of one topman, a two man working team and a two man rescue team. With extendible hand lances, the engineers were winched into the large space to blast the rag off even the highest parts of the massive screens. Not only vacuuming the silt and rag 20m vertically, Megatron’s phenomenal jetting force was required to cut the rag loose. A hydrant near the pump station provided a good water flow which was then blasted though the beast’s powerful hoses. These screens were fixed in place. Our confined space team worked using the jetting equipment and crow bars to chop through the rag. Lights powered by Megatron’s generator and the lights on the engineer’s hardhats lit the gloomy space.
The screens are in the pump station to act as grates to filter the solid waste, allowing the liquid waste through. Having not been cleaned for a number of years, the silt was almost at dangerous levels. Rag and solid waste caked the giant grates. Clearing them efficiently was essential. The silt that had built up behind it had to be removed and disposed of immediately. The utility company, who we were working on behalf of, closed the sewer’s pen stocks (large gates that act as valves regulating the flow of the sewer) temporarily which allowed the work to go ahead. A storm hit after the first day. The sewer had to be allowed to flow. Our team returned after the storm’s flow had abated and finished the remaining screens.
The engineers had compressed air breathing equipment on site in case it became necessary. Our confined space engineers were winched down into the space. They were equipped with masks and air bottles in case of gas emergencies and we had supplies of compressed air and hose with us in case it was necessary. The team could wear masks and have air pumped from above. Thankfully, this turned out not to be necessary.
Before, during and after cleaning the pump station screens:
We were delighted to complete this job for one of the South East’s largest utility companies. Our engineers’ hard work and the almighty force of Megatron allowed them to complete the job in three days!
236 tonnes of waste was cleared by Megatron and team.
As well as our beast Megatron, Jack the Giant Slayer, a second articulated bulk tanker, a standard bulk tanker, the 2 man confined space team, a jet vac tanker and a welfare unit all worked on the large job.
A large water filled Cofferdam was put in place to stop the river water from flowing through the culvert. We supplied the cofferdam for free. There is a baffle within the dam creating 2 chambers which maintain its stability.
This unsightly black bag makes minimal impact on the environment. It uses the properties of water to hold back the river water. It is simply emptied and removed when the job is complete.
The river which runs through the culvert, under the A13, supports the RSPB Reserve at Rainham Marshes. Having been an MOD firing range for several decades it was converted into the nature reserve in 2000. The area is only 6ft above sea level and could easily flood, endangering the birds.
With the dam in place, the confined space team beavered away clearing the monumental amount of waste into Megatron’s vacuum.
The bulks were filled alternately and took the waste away for disposal, allowing the beast to work continuously.
Sucking at 6000+ cubic feet per minute, Megatron is Europe’s leading vacuum tanker. This raw power from the tankers and engineers allowed this job to be completed in five days!
Our Road Sweepers are Holding Back the Sea
The shore at Rye has been attacked by marauders and smugglers over the centuries. It was defended by Camber Castle and the navy; now neither can do anything. The attack is from the sea itself. It is causing the shoreline to shift and endangering the protected habitat beyond the beach.
Rye are employing dumper trucks to take tonnes of shingle down the beach. It accumulates beside the harbour wall and they deposit it back where it can absorb the power of the waves. What King Canute made a point of establishing as an absolute; Rye Nature Reserve are turning on its head. They are preventing the tide from controlling the beach.
Our road sweepers’ role in this is to sweep up debris that falls from the dumper trucks. Naturally as the trucks shake and turn along the beach road they drop some of the pebbles. The nature of the debris means it is a task beyond the power of the average road sweeper. They are dense round objects which are difficult to pick up without powerful suction. Compare blowing away a leaf with blowing away a stone, it difficult to get air underneath them. As our road sweepers are some of the most powerful available and are equipped with high pressure jets, they have no problem removing the debris and leaving a clear path. We then tip the stones in the desired location.
Rye Harbour Nature Reserve is one of our special regular jobs. The people there have a passion to maintain the rich habitats and protect endangered wildlife. Hydro Cleansing are proud to play a crucial role in holding back the sea.