Technology:
In-Well Vapor Stripping (IWVS); demonstration of UVB system
- 7 UVB wells installed in Upper Glacial Aquifer perpendicular to the VOC plume
- Each well - 8-inch diameter steel casing and two 20-ft long stainless steel screed separated by 25-35 ft of casing and inflatable packer material; equipped with an air stripping tray
- Wells installed to depths between 193 and 243 ft below grade
- Extraction rate - 60 - 75 pgm per well; system average - 420 gpm
- Average air flow rate for each well - 425 to 791 cfm
- 34 monitoring wells screened in the Upper Glacial Aquifer
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Cleanup Authority:
CERLCA
DOE Contacts:
James Wright
DOE-SR
Subsurface Contaminants Focus Area
Telephone: (803) 725-5608
Vinnie Racaneillo
Brookhaven National Laboratory
Upton, NY
Telephone: (631) 344-5436 |
Contaminants:
VOCs
- Carbon tetrachloride, PCE, TCE, DCE, TCA
- Maximum well influent concentrations (ug/L) - carbon tetrachloride (1540), PCE (330), total VOC (1900) |
Waste Source:
Discharges from operations at the site and leaking underground storage tanks |
Type/Quantity of Media Treated:
Groundwater; Upper Glacial Aquifer
- Hydraulic conductivity - 634-1,115 gpd/ft2
- Groundwater flow direction - south
- Average horizontal groundwater velocity - 0.73 ft/day
- 278 million gallons of groundwater treated as of March 2001 |
Purpose/Significance of Application:
Demonstration of UVB recirculating well technology to treat groundwater contaminated with VOCs |
Regulatory Requirements/Cleanup Goals:
Not specified for the demonstration |
Results:
- Results reported through March 2001
- Average removal efficiencies for total VOCs ranged from 88.06% to 96.5% with an average system efficiency of 92.82%
- 278 million gallons of groundwater treated and 300 pounds of total VOCs removed
- Influent and effluent concentrations from the 7 wells have decreased since system startup
- Within the zone of influence of the recirculation cell, groundwater rate estimates for the system using field data range from 50% to 75% |
Cost Factors:
Estimated cost savings for the UVB system compared to a pump and treat system is $161,000 based on a discounted cash flow analysis |
Description:
At the DOE Brookhaven National Laboratory (BNL) in Upton, New York, groundwater is contaminated by various chlorinated organic compounds to depth ranging from 150 to 230 ft below surface. BNL is situated over a sole-source aquifer and was placed on the National Priorities List in 1989. DOE is remediating the site under a Federal Facilities Agreement, including OU 111, a groundwater plume originating near the south central portion of the site and extending beyond the sites boundaries. The groundwater plume is located within a complex glacial aquifer.
In September 1999, DOE began a demonstration of in-well vapor stripping technology at OU 111 using the patented UVB system from IEG-Technologies Corporation. Seven UVB wells, each equipped with an air stripper, were installed along the plume. As of March 2001, 300 pounds of VOCs have been removed and more that 278 million gallons of groundwater have been treated. The system is continuing to operate. According to DOE, the technical applicability of in well vapor stripping is dependent upon the hydrogeological properties of the saturated and unsaturated zones, the geochemistry of the aquifer, and the contaminants at the site. |
