Can you develop Landfills for residential?
In short, yes you can and we have both the knowledge and the experience to make this a reality for you. We have significant experience in the remediation of landfill for residential development.
Our most recent completion was the complete excavation, processing, remediation and replacement of a 440,000m3 excavated from 3 landfills. During the project we removed over 200,000m3 of cap to reveal 240,000m3 of waste. The cap was reprocessed for engineered fill with the landfill waste segregated for processing and remediation. The project took 44 months to complete and an additional 150,000m3 of earth was moved during surcharging to assist with compaction of processed materials and to minimise settlement. The project brought back into use nearly 16Ha of waste land forming residential development platforms, infrastructure and public open space.
The project sought to minimise off-site disposal and achieved this through careful pre-planning, specification control and an overall iterative and strong technical approach to materials management. The re-use of the material was a key planning consideration to reduce vehicle movement on and off site.
During the project as well as the excavation and processing of the landfill materials we pumped and treated circa 2,000,000 gallons of landfill leachate. From the remediation only 4000tonnes of waste materials that we could not re-use were disposed off-site. We recovered 600tonnes of metal for recycling but the remainder of material was re-used beneficially within the development. We completed the remediation in phases with 50% of the development now constructed with a large proportion occupied.
Concurrently with the above and some 100miles away we were busy preparing another landfill for residential development. This site posed greater challenges in terms of depth of fill and being already surrounded by housing but posed less risk to the environment and thus a less intrusive approach was chosen for remediation. Landfill gas was managed via the installation of a Virtual Gas Curtain and the landfill waste and cap was re-profiled to ensure that appropriate cover was in place to allow the development to commence. A 3D earthworks model was constructed to ensure that post remediation excavations for drainage etc. that could encounter landfill materials were minimised. Material was excavated processed, remediated and replaced as a new profile for the site. As part of the overall strategy materials were then imported to provide adequate capillary break, clean cover and topsoil for the development. However, instead of placing these materials only to waste them later in excavations they were used to surcharge the site in phases to consolidate materials ensuring that settlement was driven out the landfill profile. The site was then prepared on a phased bases for construction with the placement of raft foundations on the surcharged zone post completion and monitoring. The development was then finished with the imported materials to provide suitable materials for the plots and open space areas. Again the development has been phased creating some challenges for VertaseFLI in delivering and working concurrently with constructors but allowing an improved cash flow profile for the developer.
We have undertaken many other similar remediation projects these include the use of former landfills for commercial developments, return to nature or removal and relocation. We will be available at the Land Remediation EXPO to discuss how we have achieved these and other challenging remediation projects.
[this editorial was brought to you by VertaseFLI Limited, Stand Number C541]
