PROBLEM TO BE SOLVED: To provide a new determination method capable of accurately determining necessity of purification processing for oil contaminated soil and a purification target value independently of an oil type and an oil concentration.SOLUTION: The determination method includes: a step (S10) for analyzing the oil concentration of soil contaminated with oil a step (S20) for preparing a plurality of simulated contaminated soils a step (S30) for growing plants by using the prepared simulated contaminated soils a step (S40) for measuring a chlorophyll concentration of leaves of each grown plant and a step (S50) for determining the necessity of purification processing of contaminated soil and its purification target value on the basis of relation between the chlorophyll concentration of each plant and the oil concentration of each simulated contaminated soil.COPYRIGHT: (C)2013,JPO&INPIT【課題】油種やその濃度にかかわらず、油で汚染された土壌に対する浄化処理の必要性および浄化目標値の判定を正確に行うことができる新規な判定方法の提供。【解決手段】油で汚染された土壌の油分濃度を分析する工程(ステップS10)と、複数の模擬汚染土壌を調製する工程(ステップS20)と、調製した模擬汚染土壌を用いて植物を育成する工程(ステップS30)と、生育した各植物の葉のクロロフィル濃度を測定する工程(ステップS40)と、各植物のクロロフィル濃度と各模擬汚染土壌の油分濃度との関係に基づいて汚染土壌の浄化処理の必要性および浄化目標値を判定する工程(ステップS50)とを含む。【選択図】図1
