Accession Number : ADB097409

Title :   Installation Restoration General Environmental Technology Development. Task 11. In situ Air Stripping of Soils Pilot Study.

Descriptive Note : Final rept. Sep-Oct 85,

Corporate Author : WESTON (ROY F) INC WEST CHESTER PA

Personal Author(s) : Anastos,G. J. ; Marks,P. J. ; Corbin,M. H. ; Coia,M. F.

Report Date : OCT 1985

Pagination or Media Count : 99

Abstract : This report describes findings of an in situ pilot-scale air stripping study for treatment of volatile organic compounds (VOC) contaminated soils. In situ air stripping involves the removal of volatile organics from the soil matrix by mechanically drawing or venting air through the unsaturated contaminated soil layer. The pilot study was conducted during a 14-week field program from 19 November 1984 through 23 February 1985 at the Twin Cities Army Ammunition Plant (TCAAP), located in New Brighton, Minnesota. The in situ air stripping pilot study had two objectives. The primary objective of the pilot study was to determine the feasibility of applying in situ air stripping as a remedial action for removing TCE and other VOC's from a soil matrix. Although air stripping techniques have been applied for the removal of chlorinated organics and light molecular weight hydrocarbons from contaminated soils at other sites, the overall effectiveness, as well as system design and operating parameters, had not been previously established. Secondary objectives of this pilot study included the following: (a) Investigation of design parameters impacting the effectiveness of technology, including air flow rate and spacing requirements for air injection and extraction vent pipes, (b) Determination of removal effectiveness and removal rates compared to soil moisture, temperature, and initial VOC concentrations, (c) Preparation of conceptual engineering cost estimates (order-of-magnitude) for application of this technology, and (d) Identification of any future research for system optimization.

Descriptors :   *CONTAMINATION, *SOILS, AIR, AIR FLOW, CHLORINATION, CORRECTIONS, COST ESTIMATES, DETERMINATION, ENGINEERING, EXTRACTION, FLOW RATE, HYDROCARBONS, INJECTION, LAYERS, LIGHTWEIGHT, MINNESOTA, MOISTURE, MOLECULAR WEIGHT, OPTIMIZATION, ORGANIC COMPOUNDS, ORGANIC MATERIALS, PILOTS, PIPES, RATES, REMOVAL, REQUIREMENTS, SPACE(ROOM), UNSATURATED HYDROCARBONS, VENTING, VENTS, VOLATILITY

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE