The multifunctional Envirocone test system (METS), developed by ISMES for rapid, comprehensive in situ characterization of contaminated sites, enables sampling of pore water and soil gas up to depths of about 50m. The heart of METS is the 4.4cm-diameter Envirocone, the key element in the hydraulic connection between the subsurface strata of interest and the physico-chemical analytical instruments and/or sample receptacles in the penetrometer cabin at ground surface. A continuous flow of ground water sample is tagged in real-time with five indicator parameters: temperature, pH, redox potential, dissolved oxygen and electrical conductivity. Similarly, soil gas can be readily monitored for dissolved oxygen, total volatile organics, combustible gas, H2S, CO2, etc. Another METS module permits sampling of soil solids. Environmental data are complemented by the simultaneous acquisition of tip resistance, pore pressure and pore fluid temperature during Envirocone penetration and the option of conducting constant head permeability tests. Thus, geotechnical site characterization, ultimately required should the site be earmarked for construction, but also necessary for the rational design and implementation of clean-up and/or containment efforts, is facilitated. Such penetrometric systems also avoid various difficulties associated with conventional contaminated site characterization such as the generation of potentially polluted effluent from borehole drilling, purging and sampling of wells, etc. (A) For the covering abstract see IRRD 883023.


  • English

Media Info

  • Features: References;
  • Pagination: p. 421-37

Subject/Index Terms

Filing Info

  • Accession Number: 00729280
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2513-0
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM