Contamination characteristics of volatile organic compounds in the subsoil of a petrochemical contaminated site

In the course of investigation of a petrochemical contaminated site with a span of 35 years,the authors used a portable detecting soil gas method to rapidly and accurately detect volatile organic compounds(VOCs) concentrations in subsoil at various depths in more than 40 boreholes.Based on the knowledge of geology and hydrogeology near the site,data analysis and comparison,and using space variogram analytical method,the characteristics of VOCs concentration distribution in subsoil are summarized...