Assisted developer with risk management activities, including evaluation of area hydrology and site hydraulics, property assessment results, hydraulic modeling studies, receptor surveys, etc., to determine feasibility of proposed “brownfields” redevelopment. Assistance included performing an initial, one-dimensional computer modeling study (TRANS1D) to determine feasibility of using monitored natural attenuation (MNA) for remediation of contaminated soils and ground water at this coastal zone site. Based upon this assessment, developer proceeded to close the purchase and begin construction of new commercial development (Eckerd Pharmacy).

Results of the initial study indicated partial soil remediation and contaminant source removal would be required to prevent contaminated ground water from reaching the nearby subsurface utility trenches at an unacceptable concentration. Directed removal of UST system (Georgia ID #06-30185), including tanks, piping and dispensers, over-excavation of contaminated soils, and collection of geotechnical soils data. New store construction began immediately following the partial remediation.

Using results of UST closure assessment, developed SAP for additional site investigation, including installation of off-site monitoring wells and sampling of nearby surface and ground water receptors. Prepared off-site access permit application with Georgia Dept of Transportation (GDOT) and secured construction approval.

Mobilized to site and directed construction of proposed wells, additional soil and ground water sample collection for laboratory analyses, re-surveyed site features with tie-in to nearby USGS boundary monument, and met with local government engineers to obtain maps of underground utility trenches. Performed aquifer tests by rapidly pumping ca. 50 gallons from three different monitoring wells and timed recovery.

Using results of additional site investigation, developed two-dimensional model (BIOSCREEN) of site hydraulics and contaminant transport with decaying source term to simulate partial soil remediation and source removal. Model predicted ground water plume would never reach nearby receptors at unacceptable concentrations.

Incorporated results into combined CAP Parts A & B for submittal to the Georgia Environmental Protection Division (GEPD). Quarterly monitoring confirmed model predictions were safely conservative and GEPD issued a No Further Action Required (NFAR) letter. New pharmacy store has opened to help re-vitalize formerly depressed area.