Due to ongoing changes in
Shield is currently assisting clients with these complex decisions based on the client’s risk profile and exit strategy.
If you have a site that is lingering or in regulatory limbo in
The site soil and groundwater were impacted by release from gasoline USTs. Investigation discovered both liquid and dissolved phase gasoline impacts to groundwater were threatening a nearby stream. The plume extended to properties on both sides of a state highway and was 350 feet long, 70 feet wide and up to 8 feet thick. To further complicate the site, the plume geometry was controlled by subsurface geologic features. Arresting the migration of the plume, using multiple and strategically located remedial technologies was required for remediating soil and groundwater.
Shield conducted extensive subsurface and aquifer tests to determine effectiveness of varied technologies. We utilized integrated subsurface mapping techniques to optimize air sparging (AS) and soil vapor extraction (SVE) well system layouts and depths. Shield then designed and installed the AS / SVE system, including specifying equipment and controls. For maximum system efficiency, Shield obtained North Carolina Department of Transportation under-road boring right-of-way permits to install the remedial system under a state highway. Shield utilized a Dual Phase groundwater Pump & Treat (P&T) system with SVE for hydraulic control of an expanding liquid phase plume as a support to the AS/SVE system. Shield prepared the required discharge permit for the remedial system treated groundwater.
