Patrick M. Hicks, Ph.D. - ZEBRA Environmental Corporation; 30 N. Prospect Ave; Lynbrook, NY 11563

 The Membrane Interface Probe (MIP) provides semi quantitative/qualitative information on contaminant concentration levels, and lets the investigator collect targeted samples from contaminated zones to define concentration distribution. The data from the Cone Penetrometer (CPT) provide information on lithology and hydrology characteristics.  The Hydraulic Profiling Tool (HPT) provides information on the relative hydraulic conductivity of the subsurface. This information enhances development of an accurate site conceptual model, which can significantly reduce the cost of assessment and later remediation activities. 

 The MIP system:

• Detects volatile contaminants in real-time while probe is driven to depth.
  
• Heated direct sensing probe is driven into the ground using percussion-type probing.
  
• Sensor relies on diffusion rather than bulk flow of liquid or gas across membrane.
  
• Operates both in the vadose zone and in saturated zones.
  
• Can be used to detect dissolved chlorinated VOCs down to approx 250 ppb.
  
• Can be used to identify areas of high concentrations. 
  
• System provides simultaneous log of VOCs and soil conductivity.
  
• The MIP is a logging tool and indicates:            
  

 The CPT system:

• Determines the subsurface statigraphy in situ and geotechnical parameters of the materials present
  
• Parameters include Tip Pressure; Sleeve Friction; Friction Ratio and Pore Pressure.
  
• Combined parameters produce lithology description.
  

 The HPT System:

• Provides relative matrix backpressure as the probe is driven to depth.
  
• Can be used to estimate relative depth to water.
  
• Can be used to detect the presence of contaminants which cause a change in aquifer osmotic pressure.