Designated Investigation Agency | Investigation to Prevent Stagnation in Transactions of Cleaning Sites

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Soil contamination investigation

last updated：Oct 23, 2026

ジオテック

To facilitate the land transaction of the former cleaning store site, we will prevent transaction delays or cancellations through an immediate soil contamination survey conducted by a designated investigation agency.

This service is a comprehensive soil contamination investigation solution aimed at real estate brokerage companies and developers, designed to promote real estate transactions of former cleaning store sites safely and with a sense of urgency. In cleaning stores and factories, there are concerns about the residual risks of chemicals associated with the maintenance of past facilities and equipment, in addition to chlorine-based organic solvents such as tetrachloroethylene used in the cleaning process. GeoTech Co., Ltd. quickly arranges a historical investigation (Phase 1) that analyzes past operational history and notification information from the perspective of a designated investigation agency, a current condition survey (Phase 2) tailored to the building's status and site restrictions, and a detailed investigation (Phase 3) to determine the extent of contamination, including investigations of residual soil associated with construction. By gathering accurate and objective investigative evidence, we prevent legal risks and issues related to disclosure deficiencies in important matters. We ensure transparency that all transaction parties can agree upon and strongly support the success of land sales and negotiations for changes in use.

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basic information

This is an investigation system in accordance with the Soil Contamination Countermeasures Act, the Ministry of the Environment guidelines, and local government environmental conservation regulations, as designated by the Ministry of the Environment. It addresses first-class specified harmful substances (such as tetrachloroethylene and trichloroethylene), second-class specified harmful substances (such as lead and hexavalent chromium), and third-class specified harmful substances (such as simazine). The investigation methods include historical analysis through meticulous examination of residential maps and closed registration books, soil gas sampling and surface soil analysis considering the current buildings, boring and groundwater sampling using equipment for narrow sites, and analysis compliant with soil disposal regulations.

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Applications/Examples of results

It will be used as a risk supplement for the explanation and notification obligations before the sales contract in real estate brokerage practices, as well as safety certification materials for the buyer. Furthermore, it is suitable as administrative consultation materials during environmental due diligence when developers acquire land, as well as for land use change and redevelopment plans for condominiums and commercial facilities. Additionally, it can be widely used for confirming compliance with municipal soil regulations regarding construction-generated soil during the demolition of existing buildings and foundation work, as well as for obtaining evidence for pre-examination at disposal sites.