• Analysis on the Risk-Based Screening Levels Determined by Various Risk Assessment Tools (III): Proposed Methodology for Lead Risk Assessment in Korea
  • Jung, Jae-Woong;Nam, Kyoungphile;
  • Department of Civil and Environmental Engineering, Seoul National University;Department of Civil and Environmental Engineering, Seoul National University;
  • 다양한 위해성평가 방법에 따라 도출한 토양오염 판정기준의 차이에 관한 연구(III): 우리나라 납 오염 위해성평가 방법 제안
  • 정재웅;남경필;
  • 서울대학교 건설환경공학부;서울대학교 건설환경공학부;
Abstract
The most critical health effect of lead exposure is the neurodevelopmental effect to children caused by the increased blood lead level. Therefore, the endpoint of the risk assessment for lead-contaminated sites should be set at the blood lead level of children. In foreign countries, the risk assessment for lead-contaminated sites is conducted by estimating the increased blood lead level of children via oral intake and/or inhalation (United States Environmental Protection Agency, USEPA), or by comparing the estimated oral dose to the threshold oral dose of lead, which is derived from the permissible blood lead level of children (Dutch National Institute for Public Health and the Environment, RIVM). For the risk assessment, USEPA employs Integrated-Exposure-Uptake-Biokinetic (IEUBK) Model to check whether the estimated portion of children whose blood lead level exceeds 10 ¥ìg/dL, threshold blood lead level determined by USEPA, is higher than 5%, while Dutch RIVM compares the estimated oral dose of lead to the threshold oral dose (2.8 ¥ìg/kg-day), which is derived from the permissible blood lead level of children. In Korea, like The Netherlands, risk assessment for lead-contaminated sites is conducted by comparing the estimated oral dose to the threshold oral dose; however, because the threshold oral dose listed in Korean risk assessment guidance is an unidentified value, it is recommended to revise the existing threshold oral dose described in Korean risk assessment guidance. And, if significant lead exposure via inhalation is suspected, it is useful to employ IEUBK Model to derive the risk posed via multimedia exposure (i.e., both oral ingestion and inhalation).

Keywords: Lead;Risk Assessment;Blood lead level;

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This Article

  • 2015; 20(6): 1-7

    Published on Nov 30, 2015

  • 10.7857/JSGE.2015.20.6.001
  • Received on Nov 20, 2014
  • Revised on Dec 15, 2014
  • Accepted on Oct 12, 2015