Soil Survey to Optimize Residual Soil from Condominiums for General Contractors | Geotech

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Soil contamination survey

last updated：Oct 19, 2026

ジオテック

Achieved a reduction in the construction period for soil removal and cost optimization through preliminary sorting using staged sampling.

At construction sites for condominiums managed by general contractors, it is extremely important to quickly and appropriately transport large amounts of excavated soil resulting from foundation work off-site to maintain the construction schedule. If compliance with soil disposal regulations and acceptance site standards cannot be demonstrated early, delays in the transportation plan may occur, posing a risk to the overall progress of the project. Geotech's comprehensive soil investigation systematizes the historical examination in Phase 1 and phased sampling, visualizing contamination risks for each work section, thereby enhancing the reliability of the transportation plan and supporting the shortening of the construction period. 【Usage Scenarios】 - Formulating transportation plans for excavated soil associated with deep excavation during large-scale condominium construction - Developing efficient sampling plans based on differences in contamination risk for each work section - Sites requiring proof of compliance with municipal soil disposal regulations and acceptance site standards 【Benefits of Implementation】 - Pre-sorting through phased sampling achieves efficiency in transportation work and shortens the construction period - Optimization of disposal costs through clear separation of non-compliant soil and reusable soil - Rapid acquisition of legal evidence through official analysis by a Ministry of the Environment-designated investigation agency

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【Features】 - High-precision contamination risk assessment through phased sampling from phases 1 to 3 - Support for drilling core sampling up to a maximum depth of 10 meters - Official analysis of 29 specific hazardous substances (total cyanide, lead, hexavalent chromium, etc.) based on measurement certification - Measurements fully compliant with construction soil removal standards of each prefecture and municipal soil regulations - Support for smooth on-site operations by providing analysis results in ultra-short turnaround times 【Our Strengths】 As a designated investigation agency by the Ministry of the Environment, we offer a one-stop service from ground surveys to soil contamination investigations, and ground reinforcement design and construction. With abundant experience and reliable technical skills, we provide comprehensive support for all ground-related tasks and create the future of urban areas.

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This survey method is used to obtain prior approval for the acceptance of excavated soil generated during large-scale excavation associated with underground pits and pile foundation work during urban condominium construction, as well as civil engineering works such as subway and infrastructure development. It provides evidence of full compliance with the strict chemical substance standards specified by the receiving sites and disposal sites, and is suitable for practical scenarios that prevent delays of loading and transporting trucks on-site. Additionally, it addresses public purposes such as minimizing disposal costs through grid-based management for each construction section, expediting administrative consultations based on residual soil regulations, and providing safety operation certifications for clients and surrounding residents.