Envirotreat was commissioned by Seconique to assist with surplus soil disposal. The waste was the result of ongoing enabling works to facilitate the “letting” of the site to third parties.
Envirotreat previously undertook a comprehensive remediation programme prior to Seconique taking occupation in 2018.
Third party enabling works had resulted in the generation of three stockpiles onsite. The client required these removing to facilitate the letting of the land.
Envirotreat initially attended site and undertook sampling in accordance with the prepared sampling plan.
Stockpile 1
This consisted of crushed demolition rubble resulting in a stockpile of circa 1,200 tonne.
Sampling / testing indicated the presence of visible ACMs. Consideration was given to hand picking, however this was dismissed as it may not have be 100% effective.
Based on the testing and subsequent WM3 assessment undertaken by Envirotreat, the waste was removed offsite under EWC 17.06.05 (construction materials containing asbestos mirror hazardous).
Stockpile 2
This consisted of predominantly tarmac planings, stockpile size assessed as circa 100 tonne.
Sampling / testing indicated elevated TPH and (PAH) marker benzo(a)pyrene over the hazardous threshold (HP7 & HP11).
Based on the testing and subsequent WM3 assessment undertaken by Envirotreat, the waste was removed offsite under EWC 17.05.03 (construction materials soil and stones containing hazardous substances).
Stockpile 3
This consisted of predominantly screened soils, stockpile size assessed as circa 4,000 tonne.
One of the samples taken returned (a marginal) elevated TPH and (PAH) marker benzo(a)pyrene in respect to the hazardous threshold. Envirotreat undertook further comprehensive testing of the soils local to this exceedance. This allowed Envirotreat to fully delineate this area.
A site visit by a representative of the receiver site was undertaken to verify these works and additionally verify the absence of any ACMs within the stockpiled soils.
Based on the testing and subsequent WM3 assessment undertaken by Envirotreat, the waste stockpile was assessed as being (EWC) 17.05.04 (construction materials soil and stones other than those mentioned in 17 05 03 – mirror non-hazardous).
Disposal
Envirotreat were able to remove all materials offsite in under two week.
Envirotreat maintained a watching brief during the offsite disposal to ensure the soils were fit for the facility they were intended.
In addition, Envirotreat commissioned Reassurance Air Monitoring during the works to ensure there were no risks to site workers and offsite receptors from asbestos fibres being generated from any of the stockpiles.
Envirotreat also undertook dust monitoring using a DustTrak II Handheld Aerosol Monitor 8532 (measuring real time total dust, PM10, respirable, PM2.5 and PM1.0). Where dust levels exceeded acceptable levels, damping down was undertaken.
Once complete Envirotreat left the site ready of letting.
