Vacuum-Enhanced Two-Phase Extraction (TPE) Pilot-Scale Test Work Plan
Abstract
This work plan describes a two-week, pilot-scale treatability study to be performed at Ellsworth Air Force Base (AFB), South Dakota, Operable Unit 11 (OU-11). The location of Ellsworth AFB is shown in Figure 1-1. The purpose of the study is to gather data to support a presumptive remedy for low to moderate permeability water table aquifers contaminated with volatile organic compounds (VOCs). This will be included in the Presumptive Remedy Engineering Evaluation Cost Analysis (PREECA) initiative being developed for Headquarters Air Combat Command (HQ ACC). Vacuum-enhanced two-phase extraction is the remedy of choice. This is defined as the simultaneous extraction of groundwater and soil gas from the same well with the application of a vacuum to the well. For this test, one version of this technology, known as the Xerox 2-PHASE Extraction (2-PHASE), will be used. This pilot study will provide site-specific contaminant removal data and subsurface response data to be applied toward the evaluation of vacuum-enhanced two-phase extraction as a presumptive remedy technology. The primary objectives of this short-term, pilot-scale test are to demonstrate the contaminant removal effectiveness of 2-PHASE at removing contaminants at this site, facilitate the engineering evaluation and cost analysis of 2-PHASE, and evaluate the feasibility of 2-PHASE as a presumptive remedy.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1996
- Accession Number
- ADA384385