Disposal of Hazardous, Non-Hazardous & Inert Materials.
£1.2m Savings from NISP
The brief given to ATG Group was to reduce costs by diverting excavated material from landfill. The client was looking at a bill in excess of £1.8m to deal with the contaminated soils as specified by their consultant. ATG Group look at bringing the best available technology to the project without excessive costs.
The ATG Group approach was to undertake a full examination of all reports and findings and agree a strategy to deal with the 37728 tonnes of material requiring removal: Of this total volume, 20,340t of excavated material went to our recycling facility where it was tested, processed and returned as inert fill; 4,500t was disposed of as it could not be recycled; 12,888t was inert and used as fill under an NIEA exemption at another site owned by the client.
- Project value: £562,000
- CO2 Reduction: 2,099t
- Cost Savings: £1,200,000
- Landfill Diverted: 33,228t
- Virgin Materials: 20,340t
Dynamic in-situ remediation – Asda
The project involved the remediation and clean up of historic contamination at the former Rail and Bus Depot in Strabane which was to be redeveloped as a new superstore for ASDA creating 100’s of jobs. The site had been used for many years as the main bus and train depot for the town, and the area surrounding the main fuelling points had become saturated with fuel oil (Diesel and lube oils).
The new 37,000sq ft store included a customer cafeteria as well as a wet fish counter, with a new recycling centre incorporated within the 415-space car park. The contaminated land assessment had concluded that contamination within the soils was at such a level that there was the potential for significant health risks to the public, groundwater and nearby river Foyle. The consultants solution was for “Dig and Dump”.
The ATG Group Solution:
The site had circa 3500 tonnes of soils that were contaminated with diesel and lube oils and while the proposed method would have removed the contamination ATG considered it to be neither environmentally friendly nor cost effective. The time scale of the project allowed for the use of bio remediation, linked to site specific contamination clean up levels. The site had several areas of contamination which were excavated and processed with the addition of enhanced ATG Bio-remediation Solutions to enable rapid ex-situ Bio-Remediation to be achieved within the projects 16 week window.
ATG discovered during the project that the ground water had been contaminated with free product (oil). The initial site investigation had not assessed the groundwater therefore this contamination was unexpected. The solution was to pump and treat the ground water over a 12 week period though a mobile purpose built oil water separator with oil recovery and water treatment achieving zero visible oil discharge.
- Savings of £350,000 were achieved
- Project completed within the accelerated time scale required
- Bio-remediation and pump and treat successfully used to solve the site contamination
- Diversion of 3,500 tonnes of contaminated soils from Landfill
- Reduced virgin materials use by 3,500 tonnes
- Treatment of 12,500 m3 of contaminated groundwater treated
Luxury Apartment £750,000 – Portrush
Potentially Toxic historic contamination at the Old Gas works site in Portrush threatened to stop the multimillion redevelopment of the site as luxury apartments. The site had historically been used for the production of Gas from coal for the town, and the area surrounding the plant had been contaminated with “blue billy” and Tar oils. The contaminated land assessment had determined that the contamination was at such a level that there was the potential for significant health risks to the public.
The ATG Group Solution:
The ATG solution involved the treatment and disposal of 10,000 tonnes of soils which required removal to allow the designed site re-development levels to be achieved thus removing the significant health risk to humans. Of the material to be removed over 1,600 tonnes of soils were contaminated with tar oils and cyanide (Blue Billy). On site testing classified the material as hazardous and it was transported to our partner company, Impetus Waste Management ICI NO 3 landfill. Teesside, Co. Durham for disposal. The remaining 8,400 tonnes was tested, treated and reclassified to allow the materials to be landfilled locally at a licensed facility. The site also had ground water problems. Some of the groundwater was so heavily contaminated that it had to be tankered off site for treatment at a specialised facility. The ground water on site which was lightly contaminated was treated via the mobile purpose built oil water separator and specialist oil removal media. Additionally a cut off wall was installed to ensure that contamination from adjacent sites could not migrate into the site.
- Segregation and correct classification allowed for a saving of £750,000 on normal disposal costs for the client.
- All soils treated and removed by ATG Group with NIEA and EHO approval.
- Project carried out within approved cost budgets and on time allowing development to commence.
- Approximately 1,200 m3 of contaminated groundwater treated
- A 30 metre long cut off wall was successfully installed