We were asked by a North London Council to carry out the recommended annual inspection and cleaning of their underground diesel storage tanks.

Our client had run down the tanks to virtually empty, making ready for us to open the tank lids and pump out the residue fuel.

With all the health and safety in place and wearing the correct PPE for working in confined spaces, we safely accessed the tanks.

The tanks internal surfaces were washed down with specialist detergents and wiped dry.

All the dirty diesel and washings were removed from the tanks and safely disposed of off site with waste transfer notes being handed back to the client.

Both tanks were opened, cleaned, closed, refilled and put back on line the same day.

An ROV inspection of this fire sprinkler tank in Belfast was carried out at the instruction of our clients insurance company. The 10 year inspection showed that the mastic jointing at the panel joint seams had perished and that the Z purlins supporting the roof and vortex inhibitor were severely corroded.

Our client stored a lot of combustable materials on site, consequently their insurance company insisted that this fire water tank should be in good condition and be ready for action should a demand be made on it.

The glass enamelled 'fused' internal wall surfaces were still in excellent condition. So we only needed to make repairs to the vertical and horizontal panel joints.

Before any applications were made we keyed the surfaces by abrasive grit blasting.

We always want to apply systems that we can guarantee watertight. So it was an easy decision to encapsulate all the vertical and horizontal bolted panel joints with a fibreglass lining system and apply a zinc rich cathodic coating system over the steel work.

This picture shows the full encapsulation of the sectional panel joints using our guaranteed watertight fibreglass lining system.

It was a bit wet, cold and windy in Belfast when we were there in November. We needed to hire in an indirect diesel heater to keep the temperature inside the tank above 5c. Thanks to HSS for all there help in sourcing and supplying.

This 1st floor indoor plant room bund floor was leaking after a water evaporation test. The internal wall and floor of the bund had previously been painted with a bituminous paint that was disintegrating and showing no resistance to the hydraulic oils spills contained within the bund.

The existing bituminous coating was removed from the concrete surfaces of the bund using a HILTI concrete grinder fitted with a diamond disc and connected to a dust vac.

The cleaned and keyed surfaces were primed with a solvent free epoxy sealer.

Before the application of 2 coats of a 2 component oil resistant glass flake epoxy system. Watertightness ensured.

These cold water tanks in the Severn Valley were leaking and corroding badly. After non destructive testing/ NDT we restructured the internal surfaces with our fibreglass lining system to give them a new lease of life.

We brought in a local scaffolder to erect platforms up to the tanks for safe access and egress, enabling us to work safely throughout the refurbishment. Once the tanks were washed and cleaned, the surfaces were sand blasted with Hodge Clemco JBlast Supa blasting media.

After sandblasting and priming, layers of woven fibreglass and chopped strand fibreglass matting were applied to the surfaces and wetted out with Lloyds approved isophthalic polyester resin.

The cured fibreglass lining was completely sealed with an isophthalic gel topcoat protecting the surfaces for at least the next 25 years.

These fibreglass tanks were imported from Italy. One of them arrived damaged and failed pressure testing before going into production.

As fibreglass repair specialists, we knew we could carry out the repairs required, guarantee air tightness and get the tank back on line within days.

The stressed areas were very visible from inside the tank. The 'spiders' were in random areas so it made sense to apply a reconstructive system to the complete wall/ floor area.

We carried out abrasive sand blasting to the internal surfaces to create a good key for the localised fibreglass repairs and new fibreglass lining to adhere to.

Layers of reconstructive fibreglass were applied to the stressed areas. When the repairs had cured, a chemical resistant double layer fibreglass lining system was applied to cover the complete internal surface area to reinstate the tanks integrity.

This 30 year old galvanised sprinkler tank was leaking badly. The tank was rusting from the inside out. The original factory coating system had broken down completely and the rust had taken over.

The only repair system that was going to restore this tanks integrity and make it watertight was the application of our guaranteed for 25 year fibreglass lining system.

Initially the only way into the tank was by accessing the roof and through the BVH (Ball Valve Housing) and then another ladder down into the tank and floor. This really wasn't a safe way of working, so we cut an opening into a lower wall panel and installed a safety access hatchway.

Fist things first...the surfaces had to be cleaned and keyed by abrasive grit blasting. This process exposed all the weaknesses in the steel wall of the tank and highlighted the areas for repair...lots of them.

After grit blasting, the surfaces were primed with polyester resin and all the holes, corroded areas and panel seams repaired and reconstructed using layers of fibreglass matting. Once all the repairs had cured, a double skin fibreglass lining was applied to the complete wall surface area, sealing onto the concrete floor all the way round the inside corner of the tank.

When the completed fibreglass lining had cured, a coloured polyester gel topcoat was applied to seal the whole system guaranteeing our works for 25 years.

A week after starting our works... we bolted up the new access manway and the client put the tank back into service.

These corrugated grain silos in Suffolk were badly corroding where the silo wall meets the ground, consequently allowing water and wildlife into the silo from the outside.

From inside the silos daylight is very visible where the internal corner had rotted out.

The internal wall floor corner was sandblasted to create a good key and sealed by applying our fibreglass lining system. This guaranteed that the stored grain would be kept dry and no water or wildlife could damage the goods within.

The internal corner seal on 2No.of these effluent tanks had broken down and needed replacing. Project Linings Ltd were contracted in to remove the cracked and delaminated epoxy coating and replace like for like.

The concrete floor surfaces were cleaned and keyed by concrete grinding all the way round the internal perimeter corner of the tanks.

The internal corners were resealed with Sika TSPlus and two coats of resistant glass flake epoxy were then applied over the primed concrete surfaces.

Both tanks were bolted back up and back in service within the week.

This leaking cast iron cold water storage tank in the West Midlands needed complete refurbishment.

As the tank was being fed by a bore hole there was plenty of sludge inside.

Once the sludge was removed, we cleaned and keyed the internal surfaces by sandblasting. Removing all the rust and exposing all the underlying weaknesses with the tank. We had to use Hodge Clemco JBlast Supa sand blasting media to get the key we needed.

The keyed surfaces were primed with polyester resin. When the primer was cured we repaired all the holes and reconstructed the corroded areas using layers fibreglass matting supported by gap filling paste and a WRAS approved polyester resin.

When all the repairs had been made and cured we applied the fibreglass reinforcement matting to the walls and floor area of the tank. The reconstructive fibreglass matting was impregnated with Lloyds approved polyester resin.

When the fibreglass lining had cured, a polyester gel topcoat was applied to the surfaces sealing the lining and ensuring water tightness.

These oil storage tanks in Teesside were corroding badly around the annular ring/ external apron. They needed immediate attention to protect them against further corrosion and the possibility of the tank leaking oil into the bund.

The steel wall of the tanks and concrete aprons were sandblasted to key to take the fibreglass application.

We applied our reconstructive fibreglass lining system up the tank wall and across the concrete plinth to ensure complete rainwater run off.

This long term solution was applied to both tanks in this oil storage bund on Teesside.

These concrete wastewater tanks were no longer holding water and needed repair and refurbishment. The overall condition of the concrete was good, apart from few settlement cracks at the internal corners and the expansion joints needing re sealing.

After preparatory sandblasting we carried out the necessary concrete repairs and mastic sealing using Sika products.

We were lucky with this project, we had great weather for the whole week. Perfect conditions for applying our specialist epoxy coating system.

This concrete block constructed chemical bund was not holding water so there was little doubt it would contain any chemical spill within.

After preparatory sand blasting we applied layers of fibreglass matting to the surfaces and impregnated them with chemical resistant vinyl ester resin.

This Braithwaite water tank had been leaking for some time. Our client had been welding patch repairs over the leaks from the outside to good effect. But this practise was becoming impracticable and they wanted a repair system that would last for at least the next 20 years.

The tank was drained and inspected. It was found that the original factory bitumastic coating was breaking down and leaving the steel substrate exposed, ultimately causing the surfaces to corrode. Because of the condition of the tank is was decided to apply a reconstructive fibreglass lining covering the internal walls and floor.

The internal surfaces were all keyed by sand blasting. The sand blast prep removed what was left of the original bitu coating. A specialist resin primer was applied to the cleaned surfaces before the repairs were made and the fibreglass lining system applied to the walls and floor surfaces.

These fibreglass fermenting vessels in Manchester were being upgraded and having aeration systems fitted inside them. The tank walls needed thickening in places to be able to handle the new intrusions.

We reconstructed the areas with layers of fibreglass where the new stainless pipework was going to pass through the tank walls and be tightened on both sides.

These new stainless steel effluent/aeration tanks needed the sectional panel joints mastic sealed with Sikaflex TS Plus to ensure their watertighness.

The stainless wall had to be chemically primed and the concrete floor mechanically prepped and primed to promote the adhesion of the product to be applied.

The TS Plus was mechanically gunned on and evened off with spatulas leaving a nice tide job.

This Franklin Hodge 'Firestore' sprinkler water tank, in the basement of a central London office block was leaking from the bolted sectional panel joints

The butyl 'bag' liner inside the tank had perished with age and was floating inside the tank, meaning the whole system would have been useless should there have been a demand on the tank for putting out a fire.

The tank was being constantly topped up at the ball valve because of all the water leaking out of it.

We safely accessed the tank and removed the butyl rubber liner. Cutting it into manageable pieces that we removed safely from the tank. We could have installed a new rubber bag liner, but our client wanted a watertight system that would last 'forever' and guarantee they didn't have the same problem again.

We carried out preparartory sandblasting to the steel & concrete surfaces 150mm both sides of the panel joints.

After priming we applied our watertight fibreglass lining system over the keyed areas to seal all the joints.

This Franklin Hodge sprinkler cold water storage tank was back into service within the week.

As you can see we lucked into a good week of weather to repair these grain silos.

Access and egress from inside the silos was safe and made the project less of challenge.

The drying floors sat about 500mm up from the concrete substrate and had to removed so we could get to the lower wall.

The wooden supports were also removed to make the job a lot more doable

Once all the floor was removed, the damage was very visible. The internal wall floor corner had rotted out and was letting rainwater and vermin in from the outside.

After sandblasting the corrugated tin wall and concrete floor, we applied our fibreglass lining system. This ensured the grain in these silos was never going to get wet again and also protected the stock from vermin.

This cold water storage tank wasn't leaking, but as you can see the internal surfaces needed refurbishment.

The tank stood at over 8m high so we got the scaffolders in to erect safe working platforms around the internal perimeter. The confined space trained scaffolders made a great job giving us access to the walls.

The internal surfaces were cleaned and keyed by sand blasting. We used recycled glass as our blast media. Once prepped we applied a Lloyds approved fibreglass lining to the walls and floor. Giving a maintenance free finish that will last for at least the next 20 years.