[For the Construction Industry] Designated Survey Agency | Soil Contamination Survey (Before Demolition) | Geotech

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Soil contamination consulting

last updated：Sep 07, 2026

ジオテック

Soil contamination risk assessment and measures before dismantling will be conducted by a designated investigation agency.

In the construction industry, early identification of soil contamination risks due to past land use is crucial in demolition work and land alteration to prevent delays and additional costs. Geotech, as a designated investigation agency, provides a one-stop service from historical land use surveys (Phase 1) to soil condition surveys (Phase 2) and detailed investigations (Phase 3), ensuring reliable sample collection and soil analysis, and promptly preparing and delivering reports for administrative submission. [Usage Scenarios] - Site investigation before structural demolition - Soil risk assessment before land alteration - Analysis of excavated soil from construction - Sampling in indoor or confined spaces [Benefits of Implementation] - Risk identification during the demolition planning stage - Prevention of construction delays due to unexpected soil contamination - Cost management through appropriate measures - Assurance of legal compliance

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basic information

【Features】 - Development of investigation plans tailored to objectives from Phase 1 (historical investigation) to Phase 3 (detailed investigation) - Reliable investigations and evaluations conducted by investigation agencies designated by the Ministry of the Environment (or prefectures) - Comprehensive services from the proposal of remediation measures in the event of soil contamination to construction and management - Investigation capabilities in narrow spaces and indoors using the small boring machine "SCSC" - Accurate risk assessment and cost-effective planning by specialized technicians 【Our Strengths】 Geotech, as a designated investigation agency by the Ministry of the Environment, provides one-stop services from historical investigations (Phase 1) required before demolition work to reliable soil gas and soil sample collection (sampling) and hazardous substance determination tests. With extensive experience and proven technology, we support our clients in solving their challenges.

Price information

Please consult us as it depends on the details of the investigation.

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Applications/Examples of results

* Conducting a historical land use analysis (Phase 1 of historical investigation) and environmental risk assessment related to pre-modifications before the demolition of structures and before the handover of the cleared land. * Ensuring reliable soil gas and soil sample collection (sampling) and hazardous substance determination tests at the demolition site, fully compliant with the Soil Contamination Countermeasures Act and the environmental regulations of each municipality. * Environmental hazardous substance determination tests for construction-generated soil (excess soil) to be transported off-site due to demolition and construction work, and preparation of environmental investigation reports in the name of the designated investigation agency.