A pesticides contaminated site was targeted.Twice samplings were conducted and the comparison between analysis results of soil samples with the U.S.EPA Soil Screening Levels(SSLs) demonstrated that soil was mainly polluted by organochlorine pesticides(OCPs),namely HCHs(α-HCH,β-HCH,γ-HCH,δ-HCH),DDT,DDE,and DDD.The residue level of HCHs was from less than 0.01 mg/kg to 508 mg/kg and the residue level of DDTs was from less than 0.01 mg/kg to 390 mg/kg.This proved to be the uneven distribution of contaminants o...
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