Providence Park Remediation
KEMRON was contracted to provide environmental consulting services at Providence Park following the discovery of more than two hundred 2 gallon to 55 gallon drums and containers on the park premises located in Alpharetta, GA. The park was frequented by local residents who utilized the park’s hiking trails, rock climbing course, high ropes course, fishing lake and amphitheatre. The drums were reportedly dumped and buried at the park prior to 1970 after the property was utilized as a county road aggregate quarry and maintenance facility.
KEMRON was contracted to provide environmental consulting services at Providence Park following the discovery of more than two hundred 2 gallon to 55 gallon drums and containers on the park premises located in Alpharetta, GA. The park was frequented by local residents who utilized the park’s hiking trails, rock climbing course, high ropes course, fishing lake and amphitheatre. The drums were reportedly dumped and buried at the park prior to 1970 after the property was utilized as a county road aggregate quarry and maintenance facility.
KEMRON conducted an interim removal action by removing and disposing of several dozen of the drums and containers visible at the surface. KEMRON subsequently conducted a Site Investigation (SI) which included collecting superficial soil samples, sampling lake sediment, installing six monitoring wells and conducting a receptor survey. Numerous compounds were detected in the soil and groundwater samples including lead, tetrachloroethene, trichloroethene, vinyl chloride, benzene, xylenes, phenols, PCBs, pesticides and herbicides. More than forty private drinking water supplies were identified within a one mile radius of the site during the receptor survey. An electro-magnetic survey was conducted to identify potential buried debris and assess potential groundwater contaminant plumes. KEMRON was also an active participant in a town hall meeting organized to inform the community about site activities.
Following the initial SI, KEMRON was contracted to complete a Compliance Status Report (CSR) for submittal to the Georgia Environmental Protection Division (GAEPD). An expanded investigation was initiated to provide a complete horizontal and vertical delineation of the impact to soil and groundwater. Thirty additional soil borings and ten additional monitoring wells, including two Type III vertical delineation wells were installed. Drilling activities required the use of an ATV rig capable of installing double cased wells into rock. A track mounted remote control GeoProbe unit was utilized to complete the soil assessment.
KEMRON prepared the CSR which outlined the delineation activities, identified potential exposure routes, and determined the Site Specific Risk Reduction Standards (RRSs) for the site using RAGS equations. A statistical analysis to determine background metals concentrations in soil was also conducted as part of the CSR. Following the approval of the CSR, KEMRON conducted soil remediation activities at the site. Approximately 8,331 tons of impacted soil were removed from the site and disposed of under manifest at the Waste Management landfill in Ball Ground, Georgia. Confirmatory soil samples indicated that the impacted soil at the site was successfully remediated to below respective RRSs.
Details pertaining to this removal action were summarized in a Soil Excavation and Groundwater Sampling Summary Report. The removal activities required that KEMRON write an Erosion, Sedimentation, and Pollution Control Plan that was subsequently approved by the Fulton County Soil Erosion and Sedimentation Control Division. The removal activities also required that KEMRON obtain an encroachment buffer permit from the GAEPD prior to remediating areas within a state water embankment.
KEMRON won a second contract for the treatment of contaminated groundwater which included the installation of recovery wells and a groundwater treatment system. These activities involved clearing of trees, trenching, grading, installation of an infiltration gallery, and vegetative erosion control. KEMRON also conducted additional park restoration activities such as: clearing and disposing of fallen trees and debris, modified bank stabilization, replacing damaged fencing, improving the post excavation soil grade, addressing park security issues, and implementing erosion control actions including GADOT Class C silt fencing, rock check dams, and streambank stabilization using live stake permanent vegetation. Ongoing work at Providence Park includes the operation and maintenance of the treatment system and routine monitoring.