Cleanup Activities
| Start Date | EPA Funding | Completion Date | CA | Accomplishment Counted? | Cleanup Documentation |
|---|
| 07/11/2019 | $129,000.00 | 09/28/2022 | Atlanta, City of | Yes | |
Cleanup/Treatment Implemented:
Y
Cleanup/Treatement Categories:
Addl Cleanup/Treatment info:
In July 2019, a soil vapor extraction system (SVE) was installed to address previously-documented chlorinated solvent contamination in Site media. Four 12-inch boreholes were advanced to depths of 19.5 to 20 feet below ground surface (bgs). Approximately 15-feet of 2-inch diameter schedule 80 PVC screened pipe was installed in each borehole with #57 aggregate backfill to approximately three feet below grade. The wells were completed with 2-inch PVC risers to subgrade vaults. The SVE system is comprised of stainless risers that are flanged to PVC piping which extends to a roof-mounted manifold and blower system comprised of a three phase, two horsepower stainless steel regenerative blower and manifold with on-off valves at the inlet to the regenerative blower. After startup in February 2020, the vacuum in each well and manifold leg was balanced and the system adjusted to achieve approximately 15-inches of vacuum in each well. To maximize potential VOC removal from the subsurface through extraction and to prevent potential vapor migration and intrusion into surrounding commercial and residential structures, the SVE system will operate continuously while the remediation system is in operation for its initial five-year operational period. Oasis Consulting will coordinate site visits on a quarterly basis to monitor the system's operating parameters, evaluate treatment effectiveness, and identify the need for adjustments to SVE system flow rates.
Additionally, floor surfaces (carpet/tile) were removed and disposed of by Hibernia in November 2019 after asbestos sampling by Oasis confirmed that no ACM was present. The exposed concrete surfaces were abraded and a continuous 6-mil layer of primer was applied to the concrete surfaces in November/December 2019 by Hybrid Environmental. Then, a 20-mil layer of vapor migration sealant was spray applied to the previously primed surface to minimize vapor migration through the building floor surfaces. The floors were allowed to cure, then broom cleaned before a final seal coat was sprayed to the finished surfaces.
Address of Data Source:
Total ACRES Cleaned Up: .78
Number of Cleanup Jobs Leveraged: 4
EPA Cleanup Funding: $129,000.00
Leveraged Funding:
Cost Share Funding:
Total Funding: $129,000.00
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