The benefits of using BritFoam over Concrete are
BritFoam® is lightweight infill in comparison to concrete.
27,000 litre tank i.e. 30 m3
BritFoam weighs 25kgs per m3. i.e. 750kgs.
Concrete slurry mix average weighs 2 tonnes per m3 - 60 tonnes
When using BritFoam®, a resin based hardfoam:
- No man entry required
- Minimum disruption to the site and surrounding neighbourhood
- Average size site can be decommissioned in one day using on vehicle. Our largest vehicle’s load capacity if 180cm.
- There is no need to clean and gas freed the tank in advance of decommissioning.
- As long as the tank has been emptied correctly of residues BritFoam® can be injection into the tank via the existing pipework or through the tank lid itself.
- BritFoam® is environmentally friendly, non-toxic, virtually odourless and non-flammable.
- BritFoam® contains extremely low levels of formaldehyde (00.08% before mixed) although even with such a small amount present this helps to preserve the inner tank walls against future corrosion.
- BritFoam® fills the tank to capacity giving less likelihood of voids.
- BritFoam® cures quickly and absorbs hydrocarbons and liquids enabling the tanks to remain “inert in situ”
- BritFoam® exceeds the compressive strength requirement set out in the guidelines of the APEA/IP’s Design, Construction, Modification, Maintenance and Decommissioning of Filling Stations, 4th Edition, Revised June 2018 (the “Blue Book”).
- Should the tank require removal at a later date, after exposure the tank can be lifted from the ground in its entirety still containing the BritFoam® onto a flatbed lorry for safe removal and disposal off site. Removing the tank in this way greatly reduces the risk of contamination.
- More cost effective and time saving.
When using the concrete slurry:
- Tank lids need to be removed (possible breaking down of chambers to achieve this)
- Tanks need to be emptied, cleaned and gas freed using man entry, confined space working and the wearing off full BA.
- Cement slurry is delivered in loads of 6 cm, therefore increased number of heavy goods vehicles attending site/through neighbourhood. (i.e. 25 vehicles)
- Concrete slurry mix is self-levelling however can be prone to voids also concrete slurry cannot absorb hydrocarbons or liquids.
- Requirement for re-instatement of lid and in some cases re-building of chambers.
- Should the tank require removal at a later date, the tank would have to be exposed, split open and the concrete removed before the tank could be cut up and removed from the ground. There is also a high risk of contamination from the tank to the surrounding soil if the tank has not been cleaned correctly and emptied of residues prior to it’s decommission.
- Research shows that concrete continues to harden for 50 years after which are starts to degrade and break down. During this year periods there is likely to be possible shrinkage resulting in voids in the tank. Once again, we would like to re-iterate that if the tank has not been cleaned and gas freed prior to filling then there is a strong possibility that explosive vapours could still be present in the tank.
- Not so cost effective and whole process takes longer.