Four Georgia Coastal Plain Sites

At four contaminated sites in Georgia, Earth Systems derived alternate risk based cleanup levels based on results of a potential receptor survey and analytical, three dimensional, solute transport modeling. The sites are located in the coastal plain with hydrogeology similar to many Florida sites. The potential receptor survey identified points of withdrawal for water supply, down gradient surface water bodies, basements, and underground utilities. The fate and transport modeling characterized the human health (potable wells) and ecological risk (wetlands, tributaries, and lakes) associated with the contaminated sites. Rather than full scale remedial action, RBCA models indicated that No Further Action (NFA) was appropriate at two of the facilities. For the other two sites, the Georgia Department of Environmental Protection (EPD) approved monitoring instead of active cleanup. In all four cases, funds were prioritized in a realistic and cost-effective way to maximize protection of human health and the environment.

Jacksonville Marine Repair Facility

At a shipyard in Jacksonville, Florida, Earth Systems’ feasibility study resulted in an innovative engineering control for sand blasting grit contaminated with metals from marine paint. Rather than transporting the spent grit offsite for expensive disposal as hazardous waste, the grit was incorporated into concrete paving around the site. Risk management prevented impact to sensitive receptors and allowed survival of the business and productive use of the contaminated land.

Multiple Florida Retail Petroleum Facilities

 Earth Systems is a leader in the use of the Florida Department of Environmental Protection’s innovative risk-based No Further Action with Controls (NFAC) process. The FDEP Office of General Council has approved Restrictive Covenant Documents from Earth Systems to establish an NFAC status at dozens of sites.

To establish NFAC, reasonable risk assessment based restrictions must be established to ensure that the public and the environment are protected from contamination that is left in place. Property restrictions include engineering controls (generally as simple as the maintenance of an impermeable surface over the impacted area) and administrative controls (deed restrictions that prohibit the use of the property for purposes that might pose a risk to the public).