• Quantification of Uncertainty Associated with Environmental Site Assessments and Its Reduction Approaches
  • Kim, Geonha;Back, JongHwan;Song, Yong-Woo;
  • Department of Civil and Environmental Engineering, Hannam University;Center for Environment and Resource Analysis Certification of HNU(CERAC);Department of Civil and Environmental Engineering, Hannam University;
  • 부지 오염도 평가시 불확실성 정량화 및 저감방안
  • 김건하;백종환;송영우;
  • 한남대학교 건설시스템공학과;환경자원분석인증센터;한남대학교 건설시스템공학과;
Abstract
Uncertainty associated with a sampling method is very high in evaluating the degree of site contamination; therefore, such uncertainty affects the reliability of precise investigation and remediation verification. In particular, in evaluating a site for a small-sized filling station, underground utilities, such as connection pipes and oil storage tanks, make grid-unit sampling impossible and the resulting increase in uncertainty is inevitable. Accordingly, this study quantified the uncertainty related to the evaluation of the degree of contamination by total petroleum hydrocarbon and by benzene, toluene, ethylene, and xylene. When planning a grid aimed at detecting a hot spot, major factors that influence the increase in uncertainty include grid interval and the size and shape of the hot spot. The current guideline for soil sampling prescribes that the grid interval increase in proportion to the area of the evaluated site, but this heightens the possibility that a hot spot will not be detected. In evaluating a site, therefore, it is crucial to estimate the size and shape of the hot spot in advance and to establish a sampling plan considering a diversity of scenarios.

Keywords: Uncertainty;Protocol;Assessment;Site contamination;Sampling planning;

This Article

  • 2014; 19(1): 26-33

    Published on Feb 28, 2014

  • 10.7857/JSGE.2014.19.1.026
  • Received on Oct 22, 2013
  • Revised on Jan 16, 2014
  • Accepted on Jan 18, 2014

Correspondence to

  • E-mail: