Ground Remediation and Installation of In-Situ Remediation Systems
Earlier this year LCM Environmental was asked to tender for a Site Decommission and Remediation project at a garage forecourt in Dorset. With the tender excepted we began planning the project in conjunction with Environmental Consultants, Arcadis GMI.
We attended site and started to demolish the forecourt shop and car wash, once they were down and all materials were sorted and removed from site, our decommissioning teams installed sheet piling to protect the site boundary which was adjacent to a public footpath. Once in place our teams began excavating the site.
From previous works and records we were aware that the site had a high water table and that the excavations would need to be de-watered to a workable level using an on site separator before a remediation system could be installed, the extent of the water level is clearly visible in the images you can see.
When the excavations were cleared and de-watered our teams installed three separate remediation systems, under the supervision of Arcadis GMI.
Once the systems were in place they were covered with shingle and then using an Oxygen Releasing Compound (O.R.C) our teams covered all areas of high contamination. This is done to aid the release of the Hydrocarbons within the water and soils.
The excavations were then backfilled using off site recycled crushed concrete and the site leveled off.
The remediation system was secured with a breathable cover so that the Oxygen Releasing Compound working on breaking down the Hydrocarbons could release its byproduct (Oxygen) into the air and not the soil.
The remediation system will stay in situ until it is deemed that the levels of Hydrocarbons have dropped to a satisfactory level.
If you would like any more information regarding our Site Decommissioning and Ground Remediation projects please contact us.
With over 20 years experience garage forecourt decommissioning and remediation projects such as these are common practice for LCM
Site decommissioning normally starts with demolishing and sorting soft materials from site shops, canopy and other buildings
A high water table was no problem for LCMs teams
Applying Oxygen Releasing Compounds (O.R.C) with the supervision of Arcadis GMI
Levelling off the site ready for securing and leaving the remediation system to do its work