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» Resources : Site Evaluation Forms : Impacted Groundwater : Circulation Well Treatment (mGCW)

Microbiologically Enhanced Vertical Groundwater Circulation Well

Microbiologically enhanced vertical groundwater circulation well (mGCW) technology significantly modifies conventional GCW systems to effect the removal of inorganic constituents (e.g., heavy metals and nitrate) and/or accelerate the biodegradation of persistent organic compounds under aerobic (e.g., high-molecular-weight PAHs) or anaerobic (e.g., organic explosives, perchlorate, chlorinated hydrocarbons) conditions. The mGCW systems are specifically designed and uniquely configured to provide accelerated aerobic, enhanced anaerobic or sequential anaerobic/aerobic reactions. These reactions facilitate terminal destruction of persistent organics, appropriately coupled with the removal of inorganic constituents where needed.

mGCW technology can simultaneously provide in situ treatment of soil (vadose zone) and the saturated zone without removing groundwater.

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Site Details
Site Location

Site Description:

  • Historical Use
  • Buildings:
  • Source of Contamination
  • Current Remediation Activities
  • Etc.

Aquifer
Type
Note: Attach - lithologic cross section through the plume(s) at right angles.

Subsurface Impact
Vadose Zone
for more than one aquifer
specify separately
Note: Attach - soil analysis
Note: Attach - maps indicating horizontal and vertical distribution contaminants in vadose zone.
Phreatic Zone
for more than one aquifer
specify separately
Note: Attach - ground water contaminant analysis for monitoring wells in plume area.
Note: Attach - maps indicating horizontal and vertical distribution of groundwater contaminants in aquifer.

Field Data
Phreatic Zone
for more than one aquifer
specify separately
Direction of ground water flow
in an around plume
Hydraulic gradient in and
around plume
Horizontal hydraulic conductivity,
cm/sec
Effective porosity
Vertical hydraulic conductivity,
cm/sec
Depth to static water in plume
Depth to bottom of plume from
land surface
Note: Attach - All lithologic logs of monitoring wells in plume area, if available.
Note: Attach - Well construction logs of monitoring wells in plume area, if available.
Is Free Product present?
   If so
Chemical Composition of free
product
Density and conductivity of free
product
Confined or unconfined aquifer
conditions
Groundwater fluctuation
Viscosity of free product and
temperature at which
viscosity is measured
Aim of Remediation:
Total Clean-up
Site Containment
Hot Spot Remediation
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