This week we are carrying in out groundwater remediation beneath a communal garden in southwest England. A spillage of heating oil several years ago caused a plume of hydrocarbon contaminated groundwater. In-situ chemical oxidation was selected as a quick and cost effective way of reaching the agreed remediation targets. We expect to be on site for 5 days after which there will be little evidence of us ever being there.
Telluric Land Remediation were called in to carry out in-situ treatment of deep hydrocarbon contamination in order to discharge planning conditions on this medium sized housing development.
A historical spillage of heating oil resulted in significant contamination of subsurface soils. Previous remediation by others involved excavation of contaminated soils to a depth of about 7m and treatment above ground by bioremediation. However it was not practical to dig any deeper and oil hydrocarbons were found to be still present to depths of up to 18m.
Our solution was to use in-situ chemical oxidation to address the remaining deep contamination without the need for any soil excavation. Chemical oxidant was injected to depths of up to 20m below ground level and the site was validated to the requirements of the Regulators after 8 weeks.
Telluric Land Remediation is proud to announce that it has been successful in gaining accreditation to the new ISO 45001:2018 Health & Safety standard. ISO 45001 is the successor to OHSAS 18001, which was originally launched in 1999 as a British standard. Implemented in more than 80 countries around the world, ISO 45001 replaces OHSAS 18001 as the most well-known and important standard for Occupational Health and Safety Management Systems.
Telluric Land Remediation has completed a groundwater remediation project on the site of a parcel distribution depot in Bury St Edmunds. Groundwater was contaminated with petroleum hydrocarbons over an area of 400m2 as a result of a historical oil spill. A remediation options appraisal identified in-situ chemical oxidation as being the fastest and least disruptive option on this busy operational site. The After 6 weeks of remediation the regulators were satisfied that planning conditions relating to contamination issues could be discharged and expansion of the site could proceed.
Telluric Land Remediation has completed a ground remediation project on a former petrol filling station and car showroom in Slough. There were three subsurface plumes of petrol and diesel contamination which were cleaned up using in-situ chemical oxidation. This involved injection of chemical oxidant to the impacted zones which extended to a depth of 4m below ground level. Remediation works were complete in 5 weeks to the satisfaction of the Environment Agency and Local Authority Planning. The site will now be developed to accommodate a two-story residential care home.
Telluric Land Remediation has completed a contaminated land remediation project on a large housing development site in Taunton, Somerset. During construction of foundations for the last few remaining plots, a significant amount of oil contaminated soil was uncovered. The developer required a rapid solution that would satisfy the requirements of the Environment Agency and Local Authority Planning. Contaminated soil was excavated to a depth of 4m and transported to a soil treatment hub site, the void being filled with clean imported material. Residual dissolved phase hydrocarbons in the groundwater were then treated by in-situ chemical oxidation.
We have recently completed a ground remediation project on a commercial development site in Widnes, Cheshire. This 10 hectare site was heavily impacted with creosote as a result of its past use as a timber treatment yard. Full scale remediation work followed a successful field pilot trial that demonstrated the effectiveness of the proposed system for creosote recovery. More than 50,000 litres of free phase creosote were recovered over a 12 week period.
We have recently completed a ground remediation project on a housing development site in Aylesbury Vale, Buckinghamshire. This former paint factory site had two areas of contamination, one containing metal contamination and another larger area with organic contaminants including petroleum hydrocarbons, naphthalene, chloroethene and methyl benzene. The small volume of metal contaminated soil was removed from site to a disposal facility whereas the organic contamination was treated in-situ, initially by pump & treat, to remove grossly contaminated groundwater, and then by in-situ chemical oxidation. After 14 weeks of remediation work the Regulators were satisfied that the housing development could commence.
We have just completed a soil and groundwater remediation project on a site occupied by a utilities company in Portsmouth. Petroleum hydrocarbons present in made ground and perched groundwater were treated using in-situ chemical oxidation whilst chlorinated solvents in the underlying chalk aquifer were treated by in-situ anaerobic bioremediation, using DCL Biosolv. This project demonstrates the benefits of using more than one clean up technique to achieve cost effective remediation objectives without disrupting ongoing activities on this busy industrial site.
We have recently completed a groundwater remediation project on a development site in Wirral, Merseyside. Remediation of a localised plume of hydrocarbon contamination was needed to protect an adjacent watercourse that had been identified as at risk. In-situ chemical oxidation was used to treat the 15m deep plume which had resulted from a tank farm previously on the site. After 10 weeks of remediation work the regulators were satisfied that the site could be handed back to the developer with all planning conditions relating to contaminated groundwater being discharged.
We have recently completed a contaminated land remediation project in Southwark, London. This housing development site was heavily contaminated with hydrocarbons, including diesel and white spirit, due to leaking underground tanks from a previous site use. The site owner, a local housing developer, needed a cost-effective and rapid solution that would satisfy the requirements of the Environment Agency and Local Authority Planning. Following the removal of underground tanks, the next stage was removal of floating free phase contamination followed by in-situ chemical oxidation. After three months of remediation work the regulators were satisfied that the housing development could commence.