Enhanced Deep Soil Vapor Extraction Process (EDSVEP) Treatability Study Report

摘要

A treatability study was conducted to evaluate whether the Enhanced Deep SoilVapor Extraction Process (EDSVEP) is practicable for the removal of low volatility compounds from unsaturated subsurface soils. Test results indicate that EDSVEP may be an effective in situ alternative for the remediation of subsurface soils contaminated with low volatility compounds. Based on the treatability study results, preliminary evaluation and economic analysis of a full-scale system has been provided. An objective of this study was to determine the appropriate balance between extraction and injection flow rates such that the injection rate may be maximized while containing and recovering the injected air. Helium tracer tests were utilized to evaluate the subsurface flows and injected air recovery rates. In addition, tracer tests conducted during soil heating were used to improve operating conditions as the test progressed.