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Multilevel soil-vapor extraction test for heterogeneous soil

Journal Article · · Journal of Environmental Engineering
 [1];  [2];  [3]; ;  [4]
  1. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
  2. Goldie and Associates, Seneca, SC (United States)
  3. Northwestern Univ., Evanston, IL (United States). Dept. of Civil Engineering
  4. Univ. of South Carolina, Columbia, SC (United States)
+ Show Author Affiliations
The design, performance, and analysis of a field method for quantifying contaminant mass-extraction rates and air-phase permeability at discrete vertical locations of the vadose zones are presented. The test configuration consists of a multiscreen extraction well and multilevel observation probes located in soil layers adjacent to the extraction well. For each level tested an inflatable packer system is used to pneumatically isolate a single screen in the extraction well, and a vacuum is applied to induce air flow through the screen. Test data include contaminant concentration and flow characteristics at the extraction well, and transient or steady-state pressure drawdown data at observation probes located at variable radii from the extraction well. The test method is applicable to the design of soil-vapor extraction (SVE) and bioventing remediation systems in a variety of geologic settings, particularly stratified soils. Application of the test method at a gasoline-polluted site located in the Piedmont physiographic region is described. Contaminant mass-extraction rates, expressed in terms of volatile hydrocarbons, varied from 0.16 to 14 kg/d.
OSTI ID:
458255
Journal Information:
Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 2 Vol. 123; ISSN 0733-9372; ISSN JOEEDU
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
FIELD TESTS
HYDROCARBONS
OIL SPILLS
REMEDIAL ACTION
SITE CHARACTERIZATION
SOILS