Designated Investigation Agency | Efficient Investigation of Residential Land History to Detect Risks from Past Land Categories
Geographical and historical survey
Reduce the cost of land and historical surveys. Quickly examine past land use change histories and mixed-use land risks, and visualize underground contamination at low cost through residential land transaction sampling.
This technical document serves as an efficiency guideline for quickly and cost-effectively extracting and assessing soil contamination risks in real estate development, land acquisition, or corporate asset management practices, particularly when there are budget and timeline constraints. Even for general residential land other than forests or wastelands, rapidly scrutinizing the historical "land category change records" becomes the most rational defense strategy to identify hidden defects while thoroughly eliminating unnecessary investigation costs. In particular, it explains the rigorous historical verification know-how to efficiently digitally match time-series aerial photographs and old maps against periods of past "mixed land risk," where concerns about contamination risks are high, accurately narrowing down the areas that require sampling. Additionally, it covers the optimization procedures for "residential land sale sampling" to minimize the number of samples and reduce analysis costs, as well as the rapid official analysis practices as a designated investigation agency. This document is an essential resource for preventing transaction cancellations and ensuring the safety of the underground environment with overwhelming cost performance.
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basic information
This specification is a standard for geological and soil surveys that pursues cost performance and speed. It supports high-speed screening extraction of past land use change history based on closed registration records, as well as digital mapping of the utilization range of mixed land using aerial photographs from three major eras. In the field sampling process, it targets first-class specific hazardous substances (volatile organic compounds) and second-class specific hazardous substances (heavy metals), conducting pinpoint official method sampling up to a depth of 1.0m using simple mechanical boring and other methods. Efficient bulk analysis in our in-house laboratory allows for the issuance of measurement certificates in a short turnaround time.
Price information
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Price range
P3
Delivery Time
P4
Applications/Examples of results
This survey is used for efficient real estate due diligence that emphasizes the cost-effectiveness of land acquisition for small to medium-sized projects, the assessment of ground conditions before construction with tight deadlines, and the evaluation of transaction prices. Before concluding a sales contract, it is ideal for quickly identifying risks of hazardous substances from past mixed-use land through tracking land use changes and confirming underground safety with minimal analysis costs through sampling. This helps reduce unnecessary paperwork and excessive on-site efforts, while achieving reliable risk management at a low cost.
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