The general object of this Act is to establish a process for investigating and (where appropriate) remediation of land areas where contamination presents a significant risk of harm to human health or some other aspect of the environment. Particular objects of this Act are: (a) to set out accountabilities for managing contamination if a significant risk of harm is identified, and (b) to set out the role of the EPA in the assessment of contamination and the supervision of the investigation, remediation and management of contaminated sites, and (c) to provide for the accreditation of site auditors of contaminated land to ensure appropriate standards of auditing in the management of contaminated land, and (d) to ensure that contaminated land is managed with regard to the principles of ecologically sustainable development.