| 摘要 |
PROBLEM TO BE SOLVED: To reliably decontaminate the contaminated soil in a contaminated region rapidly and to prevent contaminants from diffusing to the outside of the contaminated region. SOLUTION: When the contaminated soil of the ground is decontaminated with a treating agent, zones 10, 10, etc., to be pretreated with the treating agent by forcibly sending the treating agent are formed in substantially all around the periphery of the contaminated region Z in a planar view and to the depth necessary for substantially covering the region Z in the depth direction, and then zones 20, 20, etc., to be post-treated with the treating agent by forcibly sending the treating agent are formed in the zones 10, 10, etc. COPYRIGHT: (C)2004,JPO
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