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Savannah River Site - A-Area Burning/Rubble Pits and Misc Chemical Basin

January 1, 2009 - 12:00pm

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US Department of Energy Groundwater Database
Groundwater Master Report

InstallationName, State: Savannah River Site
Responsible DOE Office: Office of Environmental Management
Plume Name: A-Area Burning/Rubble Pits and Misc Chemical Basin
Remediation Contractor: Savannah River Nuclear Solutions, LLC
Report Last Updated: 2009

 

Contaminants

Halogenated VOCs/SVOCs Present?: Yes

 

VOC Name Concentration (ppb) Regulatory Driver Cleanup Requirement
PCE 50 Yes 5
TCE 300 Yes 5
cis-1, 2-DCE 50 Yes 70

 

Fuel Present? No
Metals Present? No
Isotopes Present? No
Explosives Present? No
Other Contaminants? No
Tritium Present? No
Nitrates Present? No
Sulfates Present? No

 

Hydrogeology

Conduit Flow? No Depth (feet): 130
Mulitple Units Affected? Yes Avg Velocity (feet/year): 300

 

Plume Information

Source: Controlled Area of Plume (acres): 300
Plume Status: Plume expanding but not expected to migrate offsite    

 

Remdial Approach

Remedy Name Status Start Date End Date
air sparge Confirmed 2001 2003
in-well stripping Confirmed 2002 2009
monitored natural attenuation Proposed 2009 2060
soil vapor extraction Confirmed 2001 2024

 

Groundwater Use / Exit Strategy

Potable? No Does an Exit Strategy Exist? Yes
Sole Source Aquifer?  No Basis for Exit Strategy: Target Concentration

 

Environmental Indicators (EIs)

Groundwater Migration Under Control? No Current Human Exposure Acceptable? Yes
Confirmed by Lead Regulator? Yes Confirmed by Lead Regulator? Yes

 

Regulatory

Decision Document? Remedial Approach Proposed Lead Regulatory Agency: State
Date Approved:   Regulatory Driver: RCRA
Regulatory Position on Groundwater Use Same as Site? No

 

Comments

If two aquifers are impacted; M-Area and Lost Lake aquifer. Air Sparging in M-Area aquifer is not capable of restoration in timely fashion. Remedial options for Lost Lake aquifer to be developed. MNA to be used for distal portions of plumes at a minimum. Basis for Exit Strategy: MCLs for 4 consecutive quarters at selective wells. If sparging is protracted, O&M will become LTS activity. IROD approved in 2000. MNA remedial approach proposed as part of Corrective Action Plan submitted in 3/07. Recirculation wells operating under an interim action. Although plume area greater than MCLs is
currently expanding, mass is decreasing. Groundwater EI “Groundwater migration under control” is No for SRS based on state determination for entire site.

 

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