Handling of Soil and Rocks Containing Naturally Occurring Heavy Metals in Public Construction Works

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  • 建設工事における自然由来重金属等含有岩石・土壌への対応マニュアルの改訂

Abstract

<p>Rocks and soils may contain small amounts of heavy metals in their natural state. Rocks and soils excavated in large quantities in construction projects, such as tunnels and cut slopes, have long been used as effective resources for embankments and landfills. On the other hand, with the enactment of the Soil Contamination Countermeasures Act in 2003, there has been a social demand for environmental safety assessments and necessary countermeasures for rocks and soils containing naturally occurring heavy metals. In this paper, we discuss issues related to the handling of rocks and soils containing naturally occurring heavy metals in public construction works in Japan. In addition, we introduce the contents of the Ministry of Land, Infrastructure, Transport and Tourismʼs “Manual for Countermeasures against Rocks and Soils Containing Naturally Occurring Heavy Metals in Construction Work (2023 edition)” and touch up on future prospects.</p>

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