Client:
Services: Concerns: | Confidential Client, Garden City, Georgia
Former Georgia Pacific Plant Location Soil/Groundwater Investigation Landfill Permit Transfer/Revised Landfill Closure Plan Corrective Action to avoid HSI Notification Correspondence/Guidance for Site Demolition/Construction Well Closure Georgia Hazardous Sites Response Act Georgia Solid Waste Management Rules Georgia Water Well Standards Act |
Scope of Services:
AEM was contracted by the client for various services at a former Georgia Pacific plant in Garden City, Georgia. AEM was first contracted to perform a site-wide soil and groundwater investigation to evaluate potential impacts from recognized environmental conditions (RECs) identified during a Phase I Environmental Site Assessment. Potential concerns included areas where VOCs, SVOCs, and priority pollutant metals were potential pollutants from previous industrial activities on site.
The soil results indicated that no VOC, SVOC, or priority pollutant metals had concentrations above the HSRA notification concentrations; however, arsenic was detected in one well at a former resin plant area. This arsenic detection was determined to be above natural background concentrations and also slightly above the State drinking water Maximum Contaminant Level. Because of the toxicity level of arsenic and the nearby presence of drinking water wells, the site was subject to HSI listing under Georgia HSRA unless immediate corrective action was implemented.
AEM then developed and implemented a corrective action process that was completed within 30 days of discovery of the arsenic detection in groundwater. Saturated soils were excavated in the area around the monitoring well, and clean backfill (sampled in advance to confirm that there was no naturally occurring arsenic) was placed into the excavation. The critical area involved numerous subsurface water lines for an elaborate plant-wide fire suppression system; portions of the system had to be removed and then replaced during the course of the corrective action effort.
After the excavation was properly backfilled, a new monitoring well was installed at the same location as the previous well. Analytical results from the replacement well indicated that arsenic was below detection limits. At that point the soil and groundwater investigation effort was complete, and all active monitoring wells were closed in accordance with the State of Georgia Water Well Standards Act.
AEM also assisted the client with other tasks for the site. This work included transfer of an active solid waste permit for the on-site CDD landfill from Georgia Pacific to CenterPoint and the development and submittal of a revised landfill closure plan to Georgia EPD. AEM also performed an annual inspection of two non-HSI debris areas on site (previously the responsibility of Georgia Pacific) to verify that there were no erosion or sediment control issues at these areas. Notification under HSRA and the potential HSI listing was avoided.
The soil results indicated that no VOC, SVOC, or priority pollutant metals had concentrations above the HSRA notification concentrations; however, arsenic was detected in one well at a former resin plant area. This arsenic detection was determined to be above natural background concentrations and also slightly above the State drinking water Maximum Contaminant Level. Because of the toxicity level of arsenic and the nearby presence of drinking water wells, the site was subject to HSI listing under Georgia HSRA unless immediate corrective action was implemented.
AEM then developed and implemented a corrective action process that was completed within 30 days of discovery of the arsenic detection in groundwater. Saturated soils were excavated in the area around the monitoring well, and clean backfill (sampled in advance to confirm that there was no naturally occurring arsenic) was placed into the excavation. The critical area involved numerous subsurface water lines for an elaborate plant-wide fire suppression system; portions of the system had to be removed and then replaced during the course of the corrective action effort.
After the excavation was properly backfilled, a new monitoring well was installed at the same location as the previous well. Analytical results from the replacement well indicated that arsenic was below detection limits. At that point the soil and groundwater investigation effort was complete, and all active monitoring wells were closed in accordance with the State of Georgia Water Well Standards Act.
AEM also assisted the client with other tasks for the site. This work included transfer of an active solid waste permit for the on-site CDD landfill from Georgia Pacific to CenterPoint and the development and submittal of a revised landfill closure plan to Georgia EPD. AEM also performed an annual inspection of two non-HSI debris areas on site (previously the responsibility of Georgia Pacific) to verify that there were no erosion or sediment control issues at these areas. Notification under HSRA and the potential HSI listing was avoided.
