A system is disclosed for remediation of contaminated earth from hazardous substances, comprising mobile equipment that are generally available. The mobile equipment are physically separate and temporarily organised at a location in the proximity of a contaminated site when the need arises and are dispersed or disposed of following remediation of the contaminated site. The generally available mobile equipment may include earth moving excavators, truck mixers equipped with tumblers used for mixing and delivering cement-concrete to the construction site, and centrifuges.