Site Remediation: CTO Realty Growth Pumphouse Site
CTO Realty Growth (formerly Consolidated-Tomoka Land Company) is a Florida-based publicly traded real estate company, which owns a portfolio of income investments in diversified markets in the United States, including more than 1.9 million square feet of income properties, as well as approximately 8,200 acres of land in the Daytona Beach area.
CLIENT INFORMATION
- Client Since: 2015
- Location: Daytona Beach, Florida
- Industry Sector: Corporation
PROJECT INFORMATION
- Status: Ongoing
OBJECTIVE
This site was historically used as a pump station for surrounding citrus groves from the 1940s through the 1970s. Petroleum-related soil and groundwater contamination were first reported in the late 1990s, and remedial actions had included soil excavation, free product recovery, chemical oxidant injection, and air/biosparging. Under Polk County direction, HSA Golden was contracted to develop a groundwater recovery and treatment system to address remaining elevated (and recalcitrant) PAH and TPH concentrations.
PROJECT SCOPE
To properly design the pump-and-treat system, HSA Golden conducted aquifer performance testing, groundwater flow modeling, and engineering calculations. In total, 25 recovery wells were specified, which were manifolded to a diffused aerator (see photo), and treated water was discharged to an upgradient settlment basin and two infiltration trenches. In this fashion, treated groundwater was recirculated across the area of impact to assist with the flushing of contaminants from interstitial pore spaces.
RESULTS
The P&T system was operated for slightly over one year, at which point groundwater contaminant concentrations had been reduced to meet either Groundwater Cleanup Target Levels (GCTLs) or Natural Attenuation Default Concentrations (NADCs). Current activities have been reduced to once-a-year monitoring at a half-dozen monitoring well locations, and contaminant concentrations are approaching GCTLs across the site.