News/Current Projects

Working with Chase Commercial and GIP, Envirotreat implemented a remediation strategy designed to support the redevelopment of several industrial / commercial units within Warwickshire. This was a joint project between Envirotreat Technologies Ltd and Onsite Surveys Ltd. The units through previous industrial usage were contaminated with hydrocarbon contamination (including chlorinated hydrocarbons as well as total petroleum hydrocarbons). The scheme proposed consisted of E-Clay stabilisation of identified contamination hotspots both outside and within the units (under the existing floor slab) coupled with the design / implementation of an E-Clay Permeable Barrier to protect a sensitive surface water receptor at the site boundary. The innovative approach enabled the units to be fully refurbished as opposed to demolition to enable more traditional remediation approaches.

Hydrocarbon picture shows impacted soils excavated outside the unit

Working with Mason Evans in Scotland, Envirotreat were able to design and implement an economically viable integrated remediation strategy for a former gas works in St Andrews. Off-site disposal costs were considered  prohibitory, even though the site was relatively small in area, in itself no more than 25m by 25m. The site encompassed approximately two thirds of the former gas holder and considerable residual contamination elsewhere on site. The site was situated right next to a sensitive burn which feeds into the sea, on this basis impact of controlled waters was considered crucial to the success of the remediation strategy. The Envirotreat remediation strategy consisted of E-Clay stabilisation of the grossly impacted soils within the gas holder, together with the provision of a low permeability barrier to minimise recontamination of the treated soils from the remaining third of the gas holder under the neighbouring site. An E-Clay reactive barrier was designed and installed along the site adjoining the burn to further protect the burn from resident contamination.

Picture showing line of former gas tank and the contaminated ground inside.

Working closely with Hallam’s of Leicester Envirotreat were able to offer a unique remediation strategy for the remediation of a former steel works to facilitate a new commercial development for the site . Several remediation strategies were considered which involved either the treatment or disposal of several thousand cubic metres of hydrocarbon impacted soils beneath the existing floor slab. Envirotreat were able to design and gain approval for the construction of an E-Clay Permeable Reactive Barrier to protect off-site receptors.  The resultant remediation costs were a fraction of the associated treatment / disposal costs and saved further cost and time by negating  the need to excavate and remove from site the existing foundry floor slab. Envirotreat were able to demonstrate the success of the remediation by groundwater monitoring following remediation.

Former steel works site.(click to view)

Envirotreat working with Hallams of Leicester have completed the remediation of the former gas works in Stamford in Lincolnshire, to enable a residential development. The council part of the site was remediated many years ago leaving the remaining part of the gas works un-remediated. Envirotreat working closely with the council and the local Environment Agency developed a remediation strategy which satisfied all parties involved. The remediation strategy involved the E-Clay stabilisation of grossly impacted soils remaining on-site associated with the former gas holder, gas purifier and other redundant structures. Envirotreat were able to demonstrate the effectiveness of the remediation by  undertaking leachability analysis of the treated soils and with the installation and monitoring of groundwater monitoring wells following remediation.

Picture shows former gas holder at the site.

Envirotreat were commissioned by the Hellens Group to undertake remediation of contaminated sediments at Stewart Park, Middlesbrough. One part of the overall regeneration scheme for Stewart  Park  involves the regeneration of three ornamental lakes which form part of a sustainable urban drainage system for the park and surrounding area. To increase the capacity of lakes, it was proposed that the sediment which had accumulated over many years be removed and the lakes expanded. Analysis indicated the sediments to be hazardous and therefore requiring disposal at a hazardous landfill, following pre-treatment on site. Envirotreat were able to deliver a remediation strategy which involved the chemical and physical stabilisation of their contaminated sediments by E-Clay to enable their re-use on site.

Picture shows excavation of contaminated sediments at Stewart Park

Legislative news – Landfill Tax escalator sees the standard Landfill Tax rise to a rate of £56 per tonne from 1 April 2011 to 31 March 2012, with further increases to:

• £64 per tonne on 1 April 2012
• £72 per tonne on 1 April 2013
• £80 per tonne on 1 April 2014

Changes to the Deployment of Mobile Treatment Licence (Environmental Permits) see charges per application introduced.

Envirotreat (Scotland) Limited is formed. January 2011

Envirotreat Technologies Ltd move into Scotland and form Envirotreat (Scotland) Ltd. This company has been formed to tackle the ever growing Scottish market and to enhance our presence in Scotland.

Envirotreat Scotland is committed to providing cost effective, sustainable, proven remediation solutions to developers operating within Scotland. Working closely with Envirotreat Technologies Ltd and Onsite Surveys Ltd we are confident that we can solve any contaminated land issues.

Traditionally remediation has consisted of source removal by “dig n dump” (excavation and removal to landfill), increasingly this is no longer an option, mainly as a consequence of escalating Landfill Tax (currently at £56/tonne) but also due to the greater emphasis on the whole sustainability of construction with the introduction of BREEAM and Waste Management Plans. Significantly the landfill tax exemption on contaminated soils will be withdrawn in April 2012. Envirotreat Scotland are able to offer alternatives to this approach through a range of unique patented remediation technologies to address many of the contamination problems expected to be encountered whilst developing brownfield sites.

December 2010

Having been approached by Ash Remediation for a specialist remediation solution for treating contaminated Gas Holder Waste at a former gas works in Manchester. Envirotreat were able to demonstrate treatability through a range of laboratory trials. Envirotreat were able to reduce leachability of a range of contaminants of concern (including benzene, naphthalene, cyanide and ammonium) as well as producing a geotechnical product suitable for re-use. The works were undertaken by Ash Remediation.

Picture shows “Tarry” gas works waste following treatment.

Envirotreat have completed an innovative waste treatment project for a South Wales manufacturing company. The waste product is a by-product of their water treatment facility. The waste was considered a special waste on the basis of its high leachable heavy metal content. Envirotreat were able crush and treat the waste with an E-Clay specifically suited to the stabilisation of heavy metal contamination, producing a material that met local landfill criteria, this resulted in a significant saving to the client.

Envirotreat,  along with Onsite Surveys Ltd complete the remediation of a site for a new commercial development on-behalf of  South Lanarkshire Council, working closely with Mason Evans Partnership. Historically  the site had been used for various industrial purposes, resulting in most of the site having significant hydrocarbon contamination. Envirotreat were able to demonstrate the efficacy of the proposed E-Clay stabilisation by undertaking a series of treatability trials. The overall remediation strategy was designed to protect both human health and groundwater receptors. Leachate analysis of treated soils and post remediation monitoring of groundwater was undertaken to demonstrate the successful remediation of the site.

Representatives  from the Local Authority, Main Contractor (LM Construction), Architects (McLennan Partnership), Environment Consultants (Mason Evans Partnership), Structural Engineers (Odin) and Envirotreat. (click to view full image)

Envirotreat Technologies are pleased to announce a new joint venture partnership with civil engineering contractors Onsite Surveys Ltd to help deliver projects throughout Scotland and the UK. This partnership allows us the capability to not only design remediation strategies, but also to deliver the projects on a complete design and build basis. The client can now be given land which is “ready to develop”, at a cost known from the outset.

We have already complete 2 projects in Scotland and 1 in England under this partnership, all within budget and to the agreed programme of works. We are very optimistic in the partnership for the future.