Solutions - In situ remediation

Traditional remediation involves the excavation of contaminated soil, but this is sometimes financially or technically infeasible. Occasionally, these restrictions also apply to the extraction, purification and discharge of groundwater. Concrete technical examples are contaminations underneath existing structures, (underground) infrastructure, production processes, surplus water and possibilities for discharge.

In these situations, a suitable alternative is in-situ remediation, which involves the removal of contaminations by means of underground pipes and filters using biological, chemical and/or physical techniques. In certain situations, introducing nutrients directly into the soil by means of a technique called 'direct injection' may suffice, enabling remediation underneath a building. Everything remains in place, keeping nuisance for users of the location to a minimum and allowing economic activities to continue as normal.

Biological in situ remediation

The addition of process substances or nutrients promotes the natural breakdown of the contamination, a process that tends to take several years but sometimes only needs monitoring.

Chemical in-situ remediation

The contamination is oxidised by injecting chemicals. Examples of oxidants are ozone, permanganate or hydrogen peroxide. The remediation process generally takes a few months.

Physical in-situ remediation

The contamination is removed using groundwater extraction, two-phase extraction, compressed air injection and/or soil air extraction. The remediation process usually takes several years.

BAM Milieu is certified and approved for the performance of in-situ remediation operations (BRL 7002).

Remediation of industrial estate