New System for Contaminated Soil Remediation: The October 2001 "Interim Report" and Beyond

New System for Contaminated Soil Remediation: The October 2001 "Interim Report" and Beyond

In September 2001, a study group of the Ministry of the Environment released an "Interim Report on the System of Soil Environmental Conservation Measures. The aim was to establish a new system to prevent human health hazards by promoting the "understanding of contamination, risk reduction, and prevention of new risks" in an integrated manner. The framework of the new system is that the main trigger for investigation will be the closure of business sites and changes in land use, and that land with confirmed contamination will be managed by prefectural governments in ledgers, with entry restrictions, soil cover, pavement, and other measures to block exposure pathways (risk management) required. The interim report itself was put out for public comment, and the Central Environment Council has been discussing the details of institutionalization.

The business community and legal experts also voiced their opinions on the design of the system. In November of the same year, the Federation of Economic Organizations of Japan (Keidanren) requested that the survey trigger be limited to "abolition and change of use," and that consideration be given to the scope of responsibility and the practicality of technology and costs, while taking into account the concept of ledger management and risk management type. In December, the Japan Federation of Bar Associations (JFBA) raised the clarification of the principle of the causer's burden and the enhancement of information disclosure. The focus in both cases was on how to strike a balance between effectiveness and fairness, in view of the huge cleanup costs that tend to be incurred.

This trend led to legislation the following year: the Soil Contamination Countermeasures Law was passed in May 2002 and went into effect on February 15, 2003. Under the law, land requiring measures from the viewpoint of health risk (areas requiring measures) and areas requiring notification at the time of land transformation (areas requiring notification at the time of transformation) were designated, and investigation, measures, and information management were institutionalized. The purpose of the system is based on "understanding the contamination situation" and "preventing health hazards," which is in line with the concept of the interim report.

The background of the 1990s was the development of urban redevelopment projects and the emergence of soil contamination as a risk in land transactions and financing. There is a contemporaneous analysis that institutional development promoted the visualization and proper assessment of brownfields (contaminated sites) and provided the basis for balancing redevelopment and health protection.

In essence, the 2001 interim report was positioned as a bridge to the full-fledged institutionalization of the system in 2002-2003, by organizing the issues of ignition points for investigations (decommissioning and change of use), risk management through ledgers, practices to block exposure routes, and allocation of costs and responsibilities. The core of the project at that time was to formulate "a system that can be operated realistically based on health risks" while incorporating public comments and the opinions of related organizations.