site remediation
A contractor that performs environmental cleanup of a building site, especially contaminated ground.
A site remediation company is a contractor which performs advanced environmental cleanup of a building site, especially to remove toxic, radioactive, or otherwise health-threatening materials from the ground before construction begins.
The work done by this type of company is similar to that of explosives clearance companies, who clear undetonated explosives from the ground before construction work.
The work removes or deals with environmental contamination at the building site. Its defining purpose is cleanup of harmful material, rather than ordinary earth moving alone; explosives clearance has the related but distinct purpose of removing explosive hazards.